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authorJörg Frings-Fürst <debian@jff-webhosting.net>2014-09-01 13:56:46 +0200
committerJörg Frings-Fürst <debian@jff-webhosting.net>2014-09-01 13:56:46 +0200
commit22f703cab05b7cd368f4de9e03991b7664dc5022 (patch)
tree6f4d50beaa42328e24b1c6b56b6ec059e4ef21a5 /spectro/mongoose.c
Initial import of argyll version 1.5.1-8debian/1.5.1-8
Diffstat (limited to 'spectro/mongoose.c')
-rw-r--r--spectro/mongoose.c4819
1 files changed, 4819 insertions, 0 deletions
diff --git a/spectro/mongoose.c b/spectro/mongoose.c
new file mode 100644
index 0000000..e1df94a
--- /dev/null
+++ b/spectro/mongoose.c
@@ -0,0 +1,4819 @@
+// Copyright (c) 2004-2012 Sergey Lyubka
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#if defined(_WIN32)
+#define _CRT_SECURE_NO_WARNINGS // Disable deprecation warning in VS2005
+#else
+#ifdef __linux__
+#define _XOPEN_SOURCE 600 // For flockfile() on Linux
+#endif
+#define _LARGEFILE_SOURCE // Enable 64-bit file offsets
+#define __STDC_FORMAT_MACROS // <inttypes.h> wants this for C++
+#define __STDC_LIMIT_MACROS // C++ wants that for INT64_MAX
+#endif
+
+//#ifdef WIN32_LEAN_AND_MEAN
+//#undef WIN32_LEAN_AND_MEAN // Disable WIN32_LEAN_AND_MEAN, if necessary
+//#endif
+
+#define WIN32_LEAN_AND_MEAN // Set WIN32_LEAN_AND_MEAN to prevent winsock2.h problem
+
+#if defined(__SYMBIAN32__)
+#define NO_SSL // SSL is not supported
+#define NO_CGI // CGI is not supported
+#define PATH_MAX FILENAME_MAX
+#endif // __SYMBIAN32__
+
+#ifndef _WIN32_WCE // Some ANSI #includes are not available on Windows CE
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <errno.h>
+#include <signal.h>
+#include <fcntl.h>
+#endif // !_WIN32_WCE
+
+#include <time.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <assert.h>
+#include <string.h>
+#include <ctype.h>
+#include <limits.h>
+#include <stddef.h>
+#include <stdio.h>
+
+#if defined(_WIN32) && !defined(__SYMBIAN32__) // Windows specific
+#if _WIN32_WINNT < 0x0400
+# define _WIN32_WINNT 0x0400 // To make it link in VS2005
+#endif
+#ifndef WIN32
+# define WIN32
+#endif
+#include <winsock2.h>
+#include <windows.h>
+#include <ws2tcpip.h>
+
+#ifndef PATH_MAX
+# define PATH_MAX MAX_PATH
+#endif
+
+#ifndef _WIN32_WCE
+# include <process.h>
+# include <direct.h>
+# include <io.h>
+#else // _WIN32_WCE
+# define NO_CGI // WinCE has no pipes
+
+typedef long off_t;
+
+# define errno GetLastError()
+# define strerror(x) _ultoa(x, (char *) _alloca(sizeof(x) *3 ), 10)
+#endif // _WIN32_WCE
+
+#define MAKEUQUAD(lo, hi) ((uint64_t)(((uint32_t)(lo)) | \
+ ((uint64_t)((uint32_t)(hi))) << 32))
+#define RATE_DIFF 10000000 // 100 nsecs
+#define EPOCH_DIFF MAKEUQUAD(0xd53e8000, 0x019db1de)
+#define SYS2UNIX_TIME(lo, hi) \
+ (time_t) ((MAKEUQUAD((lo), (hi)) - EPOCH_DIFF) / RATE_DIFF)
+
+// Visual Studio 6 does not know __func__ or __FUNCTION__
+// The rest of MS compilers use __FUNCTION__, not C99 __func__
+// Also use _strtoui64 on modern M$ compilers
+#if defined(_MSC_VER) && _MSC_VER < 1300
+# define STRX(x) #x
+# define STR(x) STRX(x)
+# define __func__ "line " STR(__LINE__)
+# define strtoull(x, y, z) strtoul(x, y, z)
+# define strtoll(x, y, z) strtol(x, y, z)
+#else
+# define __func__ __FUNCTION__
+# define strtoull(x, y, z) _strtoui64(x, y, z)
+# define strtoll(x, y, z) _strtoi64(x, y, z)
+#endif // _MSC_VER
+
+#define ERRNO GetLastError()
+#define NO_SOCKLEN_T
+#define SSL_LIB "ssleay32.dll"
+#define CRYPTO_LIB "libeay32.dll"
+#define O_NONBLOCK 0
+#if !defined(EWOULDBLOCK)
+# define EWOULDBLOCK WSAEWOULDBLOCK
+#endif // !EWOULDBLOCK
+#define _POSIX_
+#define INT64_FMT "I64d"
+
+#define WINCDECL __cdecl
+#define SHUT_WR 1
+#define snprintf _snprintf
+#define vsnprintf _vsnprintf
+#define mg_sleep(x) Sleep(x)
+
+#define pipe(x) _pipe(x, MG_BUF_LEN, _O_BINARY)
+#ifndef popen
+# define popen(x, y) _popen(x, y)
+# define pclose(x) _pclose(x)
+#endif
+#define close(x) _close(x)
+#define dlsym(x,y) GetProcAddress((HINSTANCE) (x), (y))
+#define RTLD_LAZY 0
+#define fseeko(x, y, z) _lseeki64(_fileno(x), (y), (z))
+#define fdopen(x, y) _fdopen((x), (y))
+#define write(x, y, z) _write((x), (y), (unsigned) z)
+#define read(x, y, z) _read((x), (y), (unsigned) z)
+#define flockfile(x) EnterCriticalSection(&global_log_file_lock)
+#define funlockfile(x) LeaveCriticalSection(&global_log_file_lock)
+#define sleep(x) Sleep((x) * 1000)
+
+#if !defined(fileno)
+#define fileno(x) _fileno(x)
+#endif // !fileno MINGW #defines fileno
+
+typedef HANDLE pthread_mutex_t;
+typedef struct {HANDLE signal, broadcast;} pthread_cond_t;
+typedef DWORD pthread_t;
+#define pid_t HANDLE // MINGW typedefs pid_t to int. Using #define here.
+
+static int pthread_mutex_lock(pthread_mutex_t *);
+static int pthread_mutex_unlock(pthread_mutex_t *);
+static FILE *mg_fopen(const char *path, const char *mode);
+
+#if defined(HAVE_STDINT) || defined(INT64_MAX)
+#include <stdint.h>
+#else
+typedef unsigned int uint32_t;
+typedef unsigned short uint16_t;
+typedef unsigned __int64 uint64_t;
+typedef __int64 int64_t;
+#define INT64_MAX 9223372036854775807
+#endif // HAVE_STDINT
+
+// POSIX dirent interface
+struct dirent {
+ char d_name[PATH_MAX];
+};
+
+typedef struct DIR {
+ HANDLE handle;
+ WIN32_FIND_DATAW info;
+ struct dirent result;
+} DIR;
+
+// Mark required libraries
+#pragma comment(lib, "Ws2_32.lib")
+
+#else // UNIX specific
+#include <sys/wait.h>
+#include <sys/socket.h>
+#include <sys/select.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+#include <sys/time.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <netdb.h>
+
+#include <pwd.h>
+#include <unistd.h>
+#include <dirent.h>
+#if !defined(NO_SSL_DL) && !defined(NO_SSL)
+#include <dlfcn.h>
+#endif
+#include <pthread.h>
+#if defined(__MACH__)
+#define SSL_LIB "libssl.dylib"
+#define CRYPTO_LIB "libcrypto.dylib"
+#else
+#if !defined(SSL_LIB)
+#define SSL_LIB "libssl.so"
+#endif
+#if !defined(CRYPTO_LIB)
+#define CRYPTO_LIB "libcrypto.so"
+#endif
+#endif
+#ifndef O_BINARY
+#define O_BINARY 0
+#endif // O_BINARY
+#define closesocket(a) close(a)
+#define mg_fopen(x, y) fopen(x, y)
+#define mg_mkdir(x, y) mkdir(x, y)
+#define mg_remove(x) remove(x)
+#define mg_rename(x, y) rename(x, y)
+#define mg_sleep(x) usleep((x) * 1000)
+#define ERRNO errno
+#define INVALID_SOCKET (-1)
+#define INT64_FMT PRId64
+typedef int SOCKET;
+#define WINCDECL
+
+#endif // End of Windows and UNIX specific includes
+
+#include "mongoose.h"
+
+#define MONGOOSE_VERSION "3.3"
+#define PASSWORDS_FILE_NAME ".htpasswd"
+#define CGI_ENVIRONMENT_SIZE 4096
+#define MAX_CGI_ENVIR_VARS 64
+#define MG_BUF_LEN 8192
+#define MAX_REQUEST_SIZE 16384
+#define ARRAY_SIZE(array) (sizeof(array) / sizeof(array[0]))
+
+#ifdef _WIN32
+static CRITICAL_SECTION global_log_file_lock;
+static pthread_t pthread_self(void) {
+ return GetCurrentThreadId();
+}
+#endif // _WIN32
+
+#ifdef DEBUG_TRACE
+#undef DEBUG_TRACE
+#define DEBUG_TRACE(x)
+#else
+#if defined(DEBUG)
+#define DEBUG_TRACE(x) do { \
+ flockfile(stdout); \
+ printf("*** %lu.%p.%s.%d: ", \
+ (unsigned long) time(NULL), (void *) pthread_self(), \
+ __func__, __LINE__); \
+ printf x; \
+ putchar('\n'); \
+ fflush(stdout); \
+ funlockfile(stdout); \
+} while (0)
+#else
+#define DEBUG_TRACE(x)
+#endif // DEBUG
+#endif // DEBUG_TRACE
+
+// Darwin prior to 7.0 and Win32 do not have socklen_t
+#ifdef NO_SOCKLEN_T
+typedef int socklen_t;
+#endif // NO_SOCKLEN_T
+#define _DARWIN_UNLIMITED_SELECT
+
+#if !defined(MSG_NOSIGNAL)
+#define MSG_NOSIGNAL 0
+#endif
+
+#if !defined(SOMAXCONN)
+#define SOMAXCONN 100
+#endif
+
+#if !defined(PATH_MAX)
+#define PATH_MAX 4096
+#endif
+
+static const char *http_500_error = "Internal Server Error";
+
+// Snatched from OpenSSL includes. I put the prototypes here to be independent
+// from the OpenSSL source installation. Having this, mongoose + SSL can be
+// built on any system with binary SSL libraries installed.
+typedef struct ssl_st SSL;
+typedef struct ssl_method_st SSL_METHOD;
+typedef struct ssl_ctx_st SSL_CTX;
+
+#define SSL_ERROR_WANT_READ 2
+#define SSL_ERROR_WANT_WRITE 3
+#define SSL_FILETYPE_PEM 1
+#define CRYPTO_LOCK 1
+
+#if defined(NO_SSL_DL)
+extern void SSL_free(SSL *);
+extern int SSL_accept(SSL *);
+extern int SSL_connect(SSL *);
+extern int SSL_read(SSL *, void *, int);
+extern int SSL_write(SSL *, const void *, int);
+extern int SSL_get_error(const SSL *, int);
+extern int SSL_set_fd(SSL *, int);
+extern SSL *SSL_new(SSL_CTX *);
+extern SSL_CTX *SSL_CTX_new(SSL_METHOD *);
+extern SSL_METHOD *SSLv23_server_method(void);
+extern SSL_METHOD *SSLv23_client_method(void);
+extern int SSL_library_init(void);
+extern void SSL_load_error_strings(void);
+extern int SSL_CTX_use_PrivateKey_file(SSL_CTX *, const char *, int);
+extern int SSL_CTX_use_certificate_file(SSL_CTX *, const char *, int);
+extern int SSL_CTX_use_certificate_chain_file(SSL_CTX *, const char *);
+extern void SSL_CTX_set_default_passwd_cb(SSL_CTX *, mg_callback_t);
+extern void SSL_CTX_free(SSL_CTX *);
+extern unsigned long ERR_get_error(void);
+extern char *ERR_error_string(unsigned long, char *);
+extern int CRYPTO_num_locks(void);
+extern void CRYPTO_set_locking_callback(void (*)(int, int, const char *, int));
+extern void CRYPTO_set_id_callback(unsigned long (*)(void));
+#else
+// Dynamically loaded SSL functionality
+struct ssl_func {
+ const char *name; // SSL function name
+ void (*ptr)(void); // Function pointer
+};
+
+#define SSL_free (* (void (*)(SSL *)) ssl_sw[0].ptr)
+#define SSL_accept (* (int (*)(SSL *)) ssl_sw[1].ptr)
+#define SSL_connect (* (int (*)(SSL *)) ssl_sw[2].ptr)
+#define SSL_read (* (int (*)(SSL *, void *, int)) ssl_sw[3].ptr)
+#define SSL_write (* (int (*)(SSL *, const void *,int)) ssl_sw[4].ptr)
+#define SSL_get_error (* (int (*)(SSL *, int)) ssl_sw[5].ptr)
+#define SSL_set_fd (* (int (*)(SSL *, SOCKET)) ssl_sw[6].ptr)
+#define SSL_new (* (SSL * (*)(SSL_CTX *)) ssl_sw[7].ptr)
+#define SSL_CTX_new (* (SSL_CTX * (*)(SSL_METHOD *)) ssl_sw[8].ptr)
+#define SSLv23_server_method (* (SSL_METHOD * (*)(void)) ssl_sw[9].ptr)
+#define SSL_library_init (* (int (*)(void)) ssl_sw[10].ptr)
+#define SSL_CTX_use_PrivateKey_file (* (int (*)(SSL_CTX *, \
+ const char *, int)) ssl_sw[11].ptr)
+#define SSL_CTX_use_certificate_file (* (int (*)(SSL_CTX *, \
+ const char *, int)) ssl_sw[12].ptr)
+#define SSL_CTX_set_default_passwd_cb \
+ (* (void (*)(SSL_CTX *, mg_callback_t)) ssl_sw[13].ptr)
+#define SSL_CTX_free (* (void (*)(SSL_CTX *)) ssl_sw[14].ptr)
+#define SSL_load_error_strings (* (void (*)(void)) ssl_sw[15].ptr)
+#define SSL_CTX_use_certificate_chain_file \
+ (* (int (*)(SSL_CTX *, const char *)) ssl_sw[16].ptr)
+#define SSLv23_client_method (* (SSL_METHOD * (*)(void)) ssl_sw[17].ptr)
+
+#define CRYPTO_num_locks (* (int (*)(void)) crypto_sw[0].ptr)
+#define CRYPTO_set_locking_callback \
+ (* (void (*)(void (*)(int, int, const char *, int))) crypto_sw[1].ptr)
+#define CRYPTO_set_id_callback \
+ (* (void (*)(unsigned long (*)(void))) crypto_sw[2].ptr)
+#define ERR_get_error (* (unsigned long (*)(void)) crypto_sw[3].ptr)
+#define ERR_error_string (* (char * (*)(unsigned long,char *)) crypto_sw[4].ptr)
+
+// set_ssl_option() function updates this array.
+// It loads SSL library dynamically and changes NULLs to the actual addresses
+// of respective functions. The macros above (like SSL_connect()) are really
+// just calling these functions indirectly via the pointer.
+static struct ssl_func ssl_sw[] = {
+ {"SSL_free", NULL},
+ {"SSL_accept", NULL},
+ {"SSL_connect", NULL},
+ {"SSL_read", NULL},
+ {"SSL_write", NULL},
+ {"SSL_get_error", NULL},
+ {"SSL_set_fd", NULL},
+ {"SSL_new", NULL},
+ {"SSL_CTX_new", NULL},
+ {"SSLv23_server_method", NULL},
+ {"SSL_library_init", NULL},
+ {"SSL_CTX_use_PrivateKey_file", NULL},
+ {"SSL_CTX_use_certificate_file",NULL},
+ {"SSL_CTX_set_default_passwd_cb",NULL},
+ {"SSL_CTX_free", NULL},
+ {"SSL_load_error_strings", NULL},
+ {"SSL_CTX_use_certificate_chain_file", NULL},
+ {"SSLv23_client_method", NULL},
+ {NULL, NULL}
+};
+
+// Similar array as ssl_sw. These functions could be located in different lib.
+#if !defined(NO_SSL)
+static struct ssl_func crypto_sw[] = {
+ {"CRYPTO_num_locks", NULL},
+ {"CRYPTO_set_locking_callback", NULL},
+ {"CRYPTO_set_id_callback", NULL},
+ {"ERR_get_error", NULL},
+ {"ERR_error_string", NULL},
+ {NULL, NULL}
+};
+#endif // NO_SSL
+#endif // NO_SSL_DL
+
+static const char *month_names[] = {
+ "Jan", "Feb", "Mar", "Apr", "May", "Jun",
+ "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
+};
+
+// Unified socket address. For IPv6 support, add IPv6 address structure
+// in the union u.
+union usa {
+ struct sockaddr sa;
+ struct sockaddr_in sin;
+#if defined(USE_IPV6)
+ struct sockaddr_in6 sin6;
+#endif
+};
+
+// Describes a string (chunk of memory).
+struct vec {
+ const char *ptr;
+ size_t len;
+};
+
+// Structure used by mg_stat() function. Uses 64 bit file length.
+struct mgstat {
+ int is_directory; // Directory marker
+ int64_t size; // File size
+ time_t mtime; // Modification time
+};
+
+// Describes listening socket, or socket which was accept()-ed by the master
+// thread and queued for future handling by the worker thread.
+struct socket {
+ struct socket *next; // Linkage
+ SOCKET sock; // Listening socket
+ union usa lsa; // Local socket address
+ union usa rsa; // Remote socket address
+ int is_ssl; // Is socket SSL-ed
+};
+
+// NOTE(lsm): this enum shoulds be in sync with the config_options below.
+enum {
+ CGI_EXTENSIONS, CGI_ENVIRONMENT, PUT_DELETE_PASSWORDS_FILE, CGI_INTERPRETER,
+ PROTECT_URI, AUTHENTICATION_DOMAIN, SSI_EXTENSIONS, THROTTLE,
+ ACCESS_LOG_FILE, ENABLE_DIRECTORY_LISTING, ERROR_LOG_FILE,
+ GLOBAL_PASSWORDS_FILE, INDEX_FILES, ENABLE_KEEP_ALIVE, ACCESS_CONTROL_LIST,
+ EXTRA_MIME_TYPES, LISTENING_PORTS, DOCUMENT_ROOT, SSL_CERTIFICATE,
+ NUM_THREADS, RUN_AS_USER, REWRITE, HIDE_FILES,
+ NUM_OPTIONS
+};
+
+static const char *config_options[] = {
+ "C", "cgi_pattern", "**.cgi$|**.pl$|**.php$",
+ "E", "cgi_environment", NULL,
+ "G", "put_delete_passwords_file", NULL,
+ "I", "cgi_interpreter", NULL,
+ "P", "protect_uri", NULL,
+ "R", "authentication_domain", "mydomain.com",
+ "S", "ssi_pattern", "**.shtml$|**.shtm$",
+ "T", "throttle", NULL,
+ "a", "access_log_file", NULL,
+ "d", "enable_directory_listing", "yes",
+ "e", "error_log_file", NULL,
+ "g", "global_passwords_file", NULL,
+ "i", "index_files", "index.html,index.htm,index.cgi,index.shtml,index.php",
+ "k", "enable_keep_alive", "no",
+ "l", "access_control_list", NULL,
+ "m", "extra_mime_types", NULL,
+ "p", "listening_ports", "8080",
+ "r", "document_root", ".",
+ "s", "ssl_certificate", NULL,
+ "t", "num_threads", "20",
+ "u", "run_as_user", NULL,
+ "w", "url_rewrite_patterns", NULL,
+ "x", "hide_files_patterns", NULL,
+ NULL
+};
+#define ENTRIES_PER_CONFIG_OPTION 3
+
+struct mg_context {
+ volatile int stop_flag; // Should we stop event loop
+ SSL_CTX *ssl_ctx; // SSL context
+ SSL_CTX *client_ssl_ctx; // Client SSL context
+ char *config[NUM_OPTIONS]; // Mongoose configuration parameters
+ mg_callback_t user_callback; // User-defined callback function
+ void *user_data; // User-defined data
+
+ struct socket *listening_sockets;
+
+ volatile int num_threads; // Number of threads
+ pthread_mutex_t mutex; // Protects (max|num)_threads
+ pthread_cond_t cond; // Condvar for tracking workers terminations
+
+ struct socket queue[20]; // Accepted sockets
+ volatile int sq_head; // Head of the socket queue
+ volatile int sq_tail; // Tail of the socket queue
+ pthread_cond_t sq_full; // Signaled when socket is produced
+ pthread_cond_t sq_empty; // Signaled when socket is consumed
+};
+
+struct mg_connection {
+ struct mg_request_info request_info;
+ struct mg_context *ctx;
+ SSL *ssl; // SSL descriptor
+ struct socket client; // Connected client
+ time_t birth_time; // Time when request was received
+ int64_t num_bytes_sent; // Total bytes sent to client
+ int64_t content_len; // Content-Length header value
+ int64_t consumed_content; // How many bytes of content have been read
+ char *buf; // Buffer for received data
+ char *path_info; // PATH_INFO part of the URL
+ char *log_message; // Placeholder for the mongoose error log message
+ int must_close; // 1 if connection must be closed
+ int buf_size; // Buffer size
+ int request_len; // Size of the request + headers in a buffer
+ int data_len; // Total size of data in a buffer
+ int status_code; // HTTP reply status code, e.g. 200
+ int throttle; // Throttling, bytes/sec. <= 0 means no throttle
+ time_t last_throttle_time; // Last time throttled data was sent
+ int64_t last_throttle_bytes;// Bytes sent this second
+};
+
+const char **mg_get_valid_option_names(void) {
+ return config_options;
+}
+
+static void *call_user(struct mg_connection *conn, enum mg_event event) {
+ return conn == NULL || conn->ctx == NULL || conn->ctx->user_callback == NULL ?
+ NULL : conn->ctx->user_callback(event, conn);
+}
+
+void *mg_get_user_data(struct mg_connection *conn) {
+ return conn != NULL && conn->ctx != NULL ? conn->ctx->user_data : NULL;
+}
+
+const char *mg_get_log_message(const struct mg_connection *conn) {
+ return conn == NULL ? NULL : conn->log_message;
+}
+
+int mg_get_reply_status_code(const struct mg_connection *conn) {
+ return conn == NULL ? -1 : conn->status_code;
+}
+
+void *mg_get_ssl_context(const struct mg_connection *conn) {
+ return conn == NULL || conn->ctx == NULL ? NULL : conn->ctx->ssl_ctx;
+}
+
+static int get_option_index(const char *name) {
+ int i;
+
+ for (i = 0; config_options[i] != NULL; i += ENTRIES_PER_CONFIG_OPTION) {
+ if (strcmp(config_options[i], name) == 0 ||
+ strcmp(config_options[i + 1], name) == 0) {
+ return i / ENTRIES_PER_CONFIG_OPTION;
+ }
+ }
+ return -1;
+}
+
+const char *mg_get_option(const struct mg_context *ctx, const char *name) {
+ int i;
+ if ((i = get_option_index(name)) == -1) {
+ return NULL;
+ } else if (ctx->config[i] == NULL) {
+ return "";
+ } else {
+ return ctx->config[i];
+ }
+}
+
+static void sockaddr_to_string(char *buf, size_t len,
+ const union usa *usa) {
+ buf[0] = '\0';
+#if defined(USE_IPV6)
+ inet_ntop(usa->sa.sa_family, usa->sa.sa_family == AF_INET ?
+ (void *) &usa->sin.sin_addr :
+ (void *) &usa->sin6.sin6_addr, buf, len);
+#elif defined(_WIN32)
+ // Only Windoze Vista (and newer) have inet_ntop()
+ strncpy(buf, inet_ntoa(usa->sin.sin_addr), len);
+#else
+ inet_ntop(usa->sa.sa_family, (void *) &usa->sin.sin_addr, buf, len);
+#endif
+}
+
+static void cry(struct mg_connection *conn,
+ PRINTF_FORMAT_STRING(const char *fmt), ...) PRINTF_ARGS(2, 3);
+
+// Print error message to the opened error log stream.
+static void cry(struct mg_connection *conn, const char *fmt, ...) {
+ char buf[MG_BUF_LEN], src_addr[20];
+ va_list ap;
+ FILE *fp;
+ time_t timestamp;
+
+ va_start(ap, fmt);
+ (void) vsnprintf(buf, sizeof(buf), fmt, ap);
+ va_end(ap);
+
+ // Do not lock when getting the callback value, here and below.
+ // I suppose this is fine, since function cannot disappear in the
+ // same way string option can.
+ conn->log_message = buf;
+ if (call_user(conn, MG_EVENT_LOG) == NULL) {
+ fp = conn->ctx == NULL || conn->ctx->config[ERROR_LOG_FILE] == NULL ? NULL :
+ mg_fopen(conn->ctx->config[ERROR_LOG_FILE], "a+");
+
+ if (fp != NULL) {
+ flockfile(fp);
+ timestamp = time(NULL);
+
+ sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa);
+ fprintf(fp, "[%010lu] [error] [client %s] ", (unsigned long) timestamp,
+ src_addr);
+
+ if (conn->request_info.request_method != NULL) {
+ fprintf(fp, "%s %s: ", conn->request_info.request_method,
+ conn->request_info.uri);
+ }
+
+ (void) fprintf(fp, "%s", buf);
+ fputc('\n', fp);
+ funlockfile(fp);
+ if (fp != stderr) {
+ fclose(fp);
+ }
+ }
+ }
+ conn->log_message = NULL;
+}
+
+// Return fake connection structure. Used for logging, if connection
+// is not applicable at the moment of logging.
+static struct mg_connection *fc(struct mg_context *ctx) {
+ static struct mg_connection fake_connection;
+ fake_connection.ctx = ctx;
+ return &fake_connection;
+}
+
+const char *mg_version(void) {
+ return MONGOOSE_VERSION;
+}
+
+const struct mg_request_info *
+mg_get_request_info(const struct mg_connection *conn) {
+ return &conn->request_info;
+}
+
+static void mg_strlcpy(register char *dst, register const char *src, size_t n) {
+ for (; *src != '\0' && n > 1; n--) {
+ *dst++ = *src++;
+ }
+ *dst = '\0';
+}
+
+static int lowercase(const char *s) {
+ return tolower(* (const unsigned char *) s);
+}
+
+static int mg_strncasecmp(const char *s1, const char *s2, size_t len) {
+ int diff = 0;
+
+ if (len > 0)
+ do {
+ diff = lowercase(s1++) - lowercase(s2++);
+ } while (diff == 0 && s1[-1] != '\0' && --len > 0);
+
+ return diff;
+}
+
+static int mg_strcasecmp(const char *s1, const char *s2) {
+ int diff;
+
+ do {
+ diff = lowercase(s1++) - lowercase(s2++);
+ } while (diff == 0 && s1[-1] != '\0');
+
+ return diff;
+}
+
+static char * mg_strndup(const char *ptr, size_t len) {
+ char *p;
+
+ if ((p = (char *) malloc(len + 1)) != NULL) {
+ mg_strlcpy(p, ptr, len + 1);
+ }
+
+ return p;
+}
+
+static char * mg_strdup(const char *str) {
+ return mg_strndup(str, strlen(str));
+}
+
+// Like snprintf(), but never returns negative value, or a value
+// that is larger than a supplied buffer.
+// Thanks to Adam Zeldis to pointing snprintf()-caused vulnerability
+// in his audit report.
+static int mg_vsnprintf(struct mg_connection *conn, char *buf, size_t buflen,
+ const char *fmt, va_list ap) {
+ int n;
+
+ if (buflen == 0)
+ return 0;
+
+ n = vsnprintf(buf, buflen, fmt, ap);
+
+ if (n < 0) {
+ cry(conn, "vsnprintf error");
+ n = 0;
+ } else if (n >= (int) buflen) {
+ cry(conn, "truncating vsnprintf buffer: [%.*s]",
+ n > 200 ? 200 : n, buf);
+ n = (int) buflen - 1;
+ }
+ buf[n] = '\0';
+
+ return n;
+}
+
+static int mg_snprintf(struct mg_connection *conn, char *buf, size_t buflen,
+ PRINTF_FORMAT_STRING(const char *fmt), ...)
+ PRINTF_ARGS(4, 5);
+
+static int mg_snprintf(struct mg_connection *conn, char *buf, size_t buflen,
+ const char *fmt, ...) {
+ va_list ap;
+ int n;
+
+ va_start(ap, fmt);
+ n = mg_vsnprintf(conn, buf, buflen, fmt, ap);
+ va_end(ap);
+
+ return n;
+}
+
+// Skip the characters until one of the delimiters characters found.
+// 0-terminate resulting word. Skip the delimiter and following whitespaces if any.
+// Advance pointer to buffer to the next word. Return found 0-terminated word.
+// Delimiters can be quoted with quotechar.
+static char *skip_quoted(char **buf, const char *delimiters,
+ const char *whitespace, char quotechar) {
+ char *p, *begin_word, *end_word, *end_whitespace;
+
+ begin_word = *buf;
+ end_word = begin_word + strcspn(begin_word, delimiters);
+
+ // Check for quotechar
+ if (end_word > begin_word) {
+ p = end_word - 1;
+ while (*p == quotechar) {
+ // If there is anything beyond end_word, copy it
+ if (*end_word == '\0') {
+ *p = '\0';
+ break;
+ } else {
+ size_t end_off = strcspn(end_word + 1, delimiters);
+ memmove (p, end_word, end_off + 1);
+ p += end_off; // p must correspond to end_word - 1
+ end_word += end_off + 1;
+ }
+ }
+ for (p++; p < end_word; p++) {
+ *p = '\0';
+ }
+ }
+
+ if (*end_word == '\0') {
+ *buf = end_word;
+ } else {
+ end_whitespace = end_word + 1 + strspn(end_word + 1, whitespace);
+
+ for (p = end_word; p < end_whitespace; p++) {
+ *p = '\0';
+ }
+
+ *buf = end_whitespace;
+ }
+
+ return begin_word;
+}
+
+// Simplified version of skip_quoted without quote char
+// and whitespace == delimiters
+static char *skip(char **buf, const char *delimiters) {
+ return skip_quoted(buf, delimiters, delimiters, 0);
+}
+
+
+// Return HTTP header value, or NULL if not found.
+static const char *get_header(const struct mg_request_info *ri,
+ const char *name) {
+ int i;
+
+ for (i = 0; i < ri->num_headers; i++)
+ if (!mg_strcasecmp(name, ri->http_headers[i].name))
+ return ri->http_headers[i].value;
+
+ return NULL;
+}
+
+const char *mg_get_header(const struct mg_connection *conn, const char *name) {
+ return get_header(&conn->request_info, name);
+}
+
+// A helper function for traversing a comma separated list of values.
+// It returns a list pointer shifted to the next value, or NULL if the end
+// of the list found.
+// Value is stored in val vector. If value has form "x=y", then eq_val
+// vector is initialized to point to the "y" part, and val vector length
+// is adjusted to point only to "x".
+static const char *next_option(const char *list, struct vec *val,
+ struct vec *eq_val) {
+ if (list == NULL || *list == '\0') {
+ // End of the list
+ list = NULL;
+ } else {
+ val->ptr = list;
+ if ((list = strchr(val->ptr, ',')) != NULL) {
+ // Comma found. Store length and shift the list ptr
+ val->len = list - val->ptr;
+ list++;
+ } else {
+ // This value is the last one
+ list = val->ptr + strlen(val->ptr);
+ val->len = list - val->ptr;
+ }
+
+ if (eq_val != NULL) {
+ // Value has form "x=y", adjust pointers and lengths
+ // so that val points to "x", and eq_val points to "y".
+ eq_val->len = 0;
+ eq_val->ptr = (const char *) memchr(val->ptr, '=', val->len);
+ if (eq_val->ptr != NULL) {
+ eq_val->ptr++; // Skip over '=' character
+ eq_val->len = val->ptr + val->len - eq_val->ptr;
+ val->len = (eq_val->ptr - val->ptr) - 1;
+ }
+ }
+ }
+
+ return list;
+}
+
+static int match_prefix(const char *pattern, int pattern_len, const char *str) {
+ const char *or_str;
+ int i, j, len, res;
+
+ if ((or_str = (const char *) memchr(pattern, '|', pattern_len)) != NULL) {
+ res = match_prefix(pattern, or_str - pattern, str);
+ return res > 0 ? res :
+ match_prefix(or_str + 1, (pattern + pattern_len) - (or_str + 1), str);
+ }
+
+ i = j = 0;
+ res = -1;
+ for (; i < pattern_len; i++, j++) {
+ if (pattern[i] == '?' && str[j] != '\0') {
+ continue;
+ } else if (pattern[i] == '$') {
+ return str[j] == '\0' ? j : -1;
+ } else if (pattern[i] == '*') {
+ i++;
+ if (pattern[i] == '*') {
+ i++;
+ len = (int) strlen(str + j);
+ } else {
+ len = (int) strcspn(str + j, "/");
+ }
+ if (i == pattern_len) {
+ return j + len;
+ }
+ do {
+ res = match_prefix(pattern + i, pattern_len - i, str + j + len);
+ } while (res == -1 && len-- > 0);
+ return res == -1 ? -1 : j + res + len;
+ } else if (pattern[i] != str[j]) {
+ return -1;
+ }
+ }
+ return j;
+}
+
+// HTTP 1.1 assumes keep alive if "Connection:" header is not set
+// This function must tolerate situations when connection info is not
+// set up, for example if request parsing failed.
+static int should_keep_alive(const struct mg_connection *conn) {
+ const char *http_version = conn->request_info.http_version;
+ const char *header = mg_get_header(conn, "Connection");
+ if (conn->must_close ||
+ conn->status_code == 401 ||
+ mg_strcasecmp(conn->ctx->config[ENABLE_KEEP_ALIVE], "yes") != 0 ||
+ (header != NULL && mg_strcasecmp(header, "keep-alive") != 0) ||
+ (header == NULL && http_version && strcmp(http_version, "1.1"))) {
+ return 0;
+ }
+ return 1;
+}
+
+static const char *suggest_connection_header(const struct mg_connection *conn) {
+ return should_keep_alive(conn) ? "keep-alive" : "close";
+}
+
+static void send_http_error(struct mg_connection *, int, const char *,
+ PRINTF_FORMAT_STRING(const char *fmt), ...)
+ PRINTF_ARGS(4, 5);
+
+
+static void send_http_error(struct mg_connection *conn, int status,
+ const char *reason, const char *fmt, ...) {
+ char buf[MG_BUF_LEN];
+ va_list ap;
+ int len;
+
+ conn->status_code = status;
+ if (call_user(conn, MG_HTTP_ERROR) == NULL) {
+ buf[0] = '\0';
+ len = 0;
+
+ // Errors 1xx, 204 and 304 MUST NOT send a body
+ if (status > 199 && status != 204 && status != 304) {
+ len = mg_snprintf(conn, buf, sizeof(buf), "Error %d: %s", status, reason);
+ buf[len++] = '\n';
+
+ va_start(ap, fmt);
+ len += mg_vsnprintf(conn, buf + len, sizeof(buf) - len, fmt, ap);
+ va_end(ap);
+ }
+ DEBUG_TRACE(("[%s]", buf));
+
+ mg_printf(conn, "HTTP/1.1 %d %s\r\n"
+ "Content-Length: %d\r\n"
+ "Connection: %s\r\n\r\n", status, reason, len,
+ suggest_connection_header(conn));
+ conn->num_bytes_sent += mg_printf(conn, "%s", buf);
+ }
+}
+
+#if defined(_WIN32) && !defined(__SYMBIAN32__)
+static int pthread_mutex_init(pthread_mutex_t *mutex, void *unused) {
+ unused = NULL;
+ *mutex = CreateMutex(NULL, FALSE, NULL);
+ return *mutex == NULL ? -1 : 0;
+}
+
+static int pthread_mutex_destroy(pthread_mutex_t *mutex) {
+ return CloseHandle(*mutex) == 0 ? -1 : 0;
+}
+
+static int pthread_mutex_lock(pthread_mutex_t *mutex) {
+ return WaitForSingleObject(*mutex, INFINITE) == WAIT_OBJECT_0? 0 : -1;
+}
+
+static int pthread_mutex_unlock(pthread_mutex_t *mutex) {
+ return ReleaseMutex(*mutex) == 0 ? -1 : 0;
+}
+
+static int pthread_cond_init(pthread_cond_t *cv, const void *unused) {
+ unused = NULL;
+ cv->signal = CreateEvent(NULL, FALSE, FALSE, NULL);
+ cv->broadcast = CreateEvent(NULL, TRUE, FALSE, NULL);
+ return cv->signal != NULL && cv->broadcast != NULL ? 0 : -1;
+}
+
+static int pthread_cond_wait(pthread_cond_t *cv, pthread_mutex_t *mutex) {
+ HANDLE handles[] = {cv->signal, cv->broadcast};
+ ReleaseMutex(*mutex);
+ WaitForMultipleObjects(2, handles, FALSE, INFINITE);
+ return WaitForSingleObject(*mutex, INFINITE) == WAIT_OBJECT_0? 0 : -1;
+}
+
+static int pthread_cond_signal(pthread_cond_t *cv) {
+ return SetEvent(cv->signal) == 0 ? -1 : 0;
+}
+
+static int pthread_cond_broadcast(pthread_cond_t *cv) {
+ // Implementation with PulseEvent() has race condition, see
+ // http://www.cs.wustl.edu/~schmidt/win32-cv-1.html
+ return PulseEvent(cv->broadcast) == 0 ? -1 : 0;
+}
+
+static int pthread_cond_destroy(pthread_cond_t *cv) {
+ return CloseHandle(cv->signal) && CloseHandle(cv->broadcast) ? 0 : -1;
+}
+
+// For Windows, change all slashes to backslashes in path names.
+static void change_slashes_to_backslashes(char *path) {
+ int i;
+
+ for (i = 0; path[i] != '\0'; i++) {
+ if (path[i] == '/')
+ path[i] = '\\';
+ // i > 0 check is to preserve UNC paths, like \\server\file.txt
+ if (path[i] == '\\' && i > 0)
+ while (path[i + 1] == '\\' || path[i + 1] == '/')
+ (void) memmove(path + i + 1,
+ path + i + 2, strlen(path + i + 1));
+ }
+}
+
+// Encode 'path' which is assumed UTF-8 string, into UNICODE string.
+// wbuf and wbuf_len is a target buffer and its length.
+static void to_unicode(const char *path, wchar_t *wbuf, size_t wbuf_len) {
+ char buf[PATH_MAX], buf2[PATH_MAX], *p;
+
+ mg_strlcpy(buf, path, sizeof(buf));
+ change_slashes_to_backslashes(buf);
+
+ // Point p to the end of the file name
+ p = buf + strlen(buf) - 1;
+
+ // Trim trailing backslash character
+ while (p > buf && *p == '\\' && p[-1] != ':') {
+ *p-- = '\0';
+ }
+
+ // Protect from CGI code disclosure.
+ // This is very nasty hole. Windows happily opens files with
+ // some garbage in the end of file name. So fopen("a.cgi ", "r")
+ // actually opens "a.cgi", and does not return an error!
+ if (*p == 0x20 || // No space at the end
+ (*p == 0x2e && p > buf) || // No '.' but allow '.' as full path
+ *p == 0x2b || // No '+'
+ (*p & ~0x7f)) { // And generally no non-ASCII chars
+ (void) fprintf(stderr, "Rejecting suspicious path: [%s]", buf);
+ wbuf[0] = L'\0';
+ } else {
+ // Convert to Unicode and back. If doubly-converted string does not
+ // match the original, something is fishy, reject.
+ memset(wbuf, 0, wbuf_len * sizeof(wchar_t));
+ MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, (int) wbuf_len);
+ WideCharToMultiByte(CP_UTF8, 0, wbuf, (int) wbuf_len, buf2, sizeof(buf2),
+ NULL, NULL);
+ if (strcmp(buf, buf2) != 0) {
+ wbuf[0] = L'\0';
+ }
+ }
+}
+
+#if defined(_WIN32_WCE)
+static time_t time(time_t *ptime) {
+ time_t t;
+ SYSTEMTIME st;
+ FILETIME ft;
+
+ GetSystemTime(&st);
+ SystemTimeToFileTime(&st, &ft);
+ t = SYS2UNIX_TIME(ft.dwLowDateTime, ft.dwHighDateTime);
+
+ if (ptime != NULL) {
+ *ptime = t;
+ }
+
+ return t;
+}
+
+static struct tm *localtime(const time_t *ptime, struct tm *ptm) {
+ int64_t t = ((int64_t) *ptime) * RATE_DIFF + EPOCH_DIFF;
+ FILETIME ft, lft;
+ SYSTEMTIME st;
+ TIME_ZONE_INFORMATION tzinfo;
+
+ if (ptm == NULL) {
+ return NULL;
+ }
+
+ * (int64_t *) &ft = t;
+ FileTimeToLocalFileTime(&ft, &lft);
+ FileTimeToSystemTime(&lft, &st);
+ ptm->tm_year = st.wYear - 1900;
+ ptm->tm_mon = st.wMonth - 1;
+ ptm->tm_wday = st.wDayOfWeek;
+ ptm->tm_mday = st.wDay;
+ ptm->tm_hour = st.wHour;
+ ptm->tm_min = st.wMinute;
+ ptm->tm_sec = st.wSecond;
+ ptm->tm_yday = 0; // hope nobody uses this
+ ptm->tm_isdst =
+ GetTimeZoneInformation(&tzinfo) == TIME_ZONE_ID_DAYLIGHT ? 1 : 0;
+
+ return ptm;
+}
+
+static struct tm *gmtime(const time_t *ptime, struct tm *ptm) {
+ // FIXME(lsm): fix this.
+ return localtime(ptime, ptm);
+}
+
+static size_t strftime(char *dst, size_t dst_size, const char *fmt,
+ const struct tm *tm) {
+ (void) snprintf(dst, dst_size, "implement strftime() for WinCE");
+ return 0;
+}
+#endif
+
+static int mg_rename(const char* oldname, const char* newname) {
+ wchar_t woldbuf[PATH_MAX];
+ wchar_t wnewbuf[PATH_MAX];
+
+ to_unicode(oldname, woldbuf, ARRAY_SIZE(woldbuf));
+ to_unicode(newname, wnewbuf, ARRAY_SIZE(wnewbuf));
+
+ return MoveFileW(woldbuf, wnewbuf) ? 0 : -1;
+}
+
+
+static FILE *mg_fopen(const char *path, const char *mode) {
+ wchar_t wbuf[PATH_MAX], wmode[20];
+
+ to_unicode(path, wbuf, ARRAY_SIZE(wbuf));
+ MultiByteToWideChar(CP_UTF8, 0, mode, -1, wmode, ARRAY_SIZE(wmode));
+
+ return _wfopen(wbuf, wmode);
+}
+
+static int mg_stat(const char *path, struct mgstat *stp) {
+ int ok = -1; // Error
+ wchar_t wbuf[PATH_MAX];
+ WIN32_FILE_ATTRIBUTE_DATA info;
+
+ to_unicode(path, wbuf, ARRAY_SIZE(wbuf));
+
+ if (GetFileAttributesExW(wbuf, GetFileExInfoStandard, &info) != 0) {
+ stp->size = MAKEUQUAD(info.nFileSizeLow, info.nFileSizeHigh);
+ stp->mtime = SYS2UNIX_TIME(info.ftLastWriteTime.dwLowDateTime,
+ info.ftLastWriteTime.dwHighDateTime);
+ stp->is_directory =
+ info.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY;
+ ok = 0; // Success
+ }
+
+ return ok;
+}
+
+static int mg_remove(const char *path) {
+ wchar_t wbuf[PATH_MAX];
+ to_unicode(path, wbuf, ARRAY_SIZE(wbuf));
+ return DeleteFileW(wbuf) ? 0 : -1;
+}
+
+static int mg_mkdir(const char *path, int mode) {
+ char buf[PATH_MAX];
+ wchar_t wbuf[PATH_MAX];
+
+ mode = 0; // Unused
+ mg_strlcpy(buf, path, sizeof(buf));
+ change_slashes_to_backslashes(buf);
+
+ (void) MultiByteToWideChar(CP_UTF8, 0, buf, -1, wbuf, sizeof(wbuf));
+
+ return CreateDirectoryW(wbuf, NULL) ? 0 : -1;
+}
+
+// Implementation of POSIX opendir/closedir/readdir for Windows.
+static DIR * opendir(const char *name) {
+ DIR *dir = NULL;
+ wchar_t wpath[PATH_MAX];
+ DWORD attrs;
+
+ if (name == NULL) {
+ SetLastError(ERROR_BAD_ARGUMENTS);
+ } else if ((dir = (DIR *) malloc(sizeof(*dir))) == NULL) {
+ SetLastError(ERROR_NOT_ENOUGH_MEMORY);
+ } else {
+ to_unicode(name, wpath, ARRAY_SIZE(wpath));
+ attrs = GetFileAttributesW(wpath);
+ if (attrs != 0xFFFFFFFF &&
+ ((attrs & FILE_ATTRIBUTE_DIRECTORY) == FILE_ATTRIBUTE_DIRECTORY)) {
+ (void) wcscat(wpath, L"\\*");
+ dir->handle = FindFirstFileW(wpath, &dir->info);
+ dir->result.d_name[0] = '\0';
+ } else {
+ free(dir);
+ dir = NULL;
+ }
+ }
+
+ return dir;
+}
+
+static int closedir(DIR *dir) {
+ int result = 0;
+
+ if (dir != NULL) {
+ if (dir->handle != INVALID_HANDLE_VALUE)
+ result = FindClose(dir->handle) ? 0 : -1;
+
+ free(dir);
+ } else {
+ result = -1;
+ SetLastError(ERROR_BAD_ARGUMENTS);
+ }
+
+ return result;
+}
+
+static struct dirent *readdir(DIR *dir) {
+ struct dirent *result = 0;
+
+ if (dir) {
+ if (dir->handle != INVALID_HANDLE_VALUE) {
+ result = &dir->result;
+ (void) WideCharToMultiByte(CP_UTF8, 0,
+ dir->info.cFileName, -1, result->d_name,
+ sizeof(result->d_name), NULL, NULL);
+
+ if (!FindNextFileW(dir->handle, &dir->info)) {
+ (void) FindClose(dir->handle);
+ dir->handle = INVALID_HANDLE_VALUE;
+ }
+
+ } else {
+ SetLastError(ERROR_FILE_NOT_FOUND);
+ }
+ } else {
+ SetLastError(ERROR_BAD_ARGUMENTS);
+ }
+
+ return result;
+}
+
+#define set_close_on_exec(fd) // No FD_CLOEXEC on Windows
+
+int mg_start_thread(mg_thread_func_t f, void *p) {
+ return _beginthread((void (__cdecl *)(void *)) f, 0, p) == -1L ? -1 : 0;
+}
+
+static HANDLE dlopen(const char *dll_name, int flags) {
+ wchar_t wbuf[PATH_MAX];
+ flags = 0; // Unused
+ to_unicode(dll_name, wbuf, ARRAY_SIZE(wbuf));
+ return LoadLibraryW(wbuf);
+}
+
+#if !defined(NO_CGI)
+#define SIGKILL 0
+static int kill(pid_t pid, int sig_num) {
+ (void) TerminateProcess(pid, sig_num);
+ (void) CloseHandle(pid);
+ return 0;
+}
+
+static pid_t spawn_process(struct mg_connection *conn, const char *prog,
+ char *envblk, char *envp[], int fd_stdin,
+ int fd_stdout, const char *dir) {
+ HANDLE me;
+ char *p, *interp, full_interp[PATH_MAX], cmdline[PATH_MAX], buf[PATH_MAX];
+ FILE *fp;
+ STARTUPINFOA si = { sizeof(si) };
+ PROCESS_INFORMATION pi = { 0 };
+
+ envp = NULL; // Unused
+
+ // TODO(lsm): redirect CGI errors to the error log file
+ si.dwFlags = STARTF_USESTDHANDLES | STARTF_USESHOWWINDOW;
+ si.wShowWindow = SW_HIDE;
+
+ me = GetCurrentProcess();
+ DuplicateHandle(me, (HANDLE) _get_osfhandle(fd_stdin), me,
+ &si.hStdInput, 0, TRUE, DUPLICATE_SAME_ACCESS);
+ DuplicateHandle(me, (HANDLE) _get_osfhandle(fd_stdout), me,
+ &si.hStdOutput, 0, TRUE, DUPLICATE_SAME_ACCESS);
+
+ // If CGI file is a script, try to read the interpreter line
+ interp = conn->ctx->config[CGI_INTERPRETER];
+ if (interp == NULL) {
+ buf[0] = buf[2] = '\0';
+
+ // Read the first line of the script into the buffer
+ snprintf(cmdline, sizeof(cmdline), "%s%c%s", dir, '/', prog);
+ if ((fp = mg_fopen(cmdline, "r")) != NULL) {
+ fgets(buf, sizeof(buf), fp);
+ fclose(fp);
+ buf[sizeof(buf) - 1] = '\0';
+ }
+
+ if (buf[0] == '#' && buf[1] == '!') {
+ // Trim whitespace in interpreter name
+ for (p = buf + 2; *p != '\0' && isspace(* (unsigned char *) p); )
+ p++;
+ *p = '\0';
+ }
+ interp = buf + 2;
+ }
+
+ if (interp[0] != '\0') {
+ GetFullPathName(interp, sizeof(full_interp), full_interp, NULL);
+ interp = full_interp;
+ }
+
+ mg_snprintf(conn, cmdline, sizeof(cmdline), "%s%s%s",
+ interp, interp[0] == '\0' ? "" : " ", prog);
+
+ DEBUG_TRACE(("Running [%s]", cmdline));
+ if (CreateProcessA(NULL, cmdline, NULL, NULL, TRUE,
+ CREATE_NEW_PROCESS_GROUP, envblk, dir, &si, &pi) == 0) {
+ cry(conn, "%s: CreateProcess(%s): %d",
+ __func__, cmdline, ERRNO);
+ pi.hProcess = (pid_t) -1;
+ }
+
+ // Always close these to prevent handle leakage.
+ (void) close(fd_stdin);
+ (void) close(fd_stdout);
+
+ (void) CloseHandle(si.hStdOutput);
+ (void) CloseHandle(si.hStdInput);
+ (void) CloseHandle(pi.hThread);
+
+ return (pid_t) pi.hProcess;
+}
+#endif // !NO_CGI
+
+static int set_non_blocking_mode(SOCKET sock) {
+ unsigned long on = 1;
+ return ioctlsocket(sock, FIONBIO, &on);
+}
+
+#else
+static int mg_stat(const char *path, struct mgstat *stp) {
+ struct stat st;
+ int ok;
+
+ if (stat(path, &st) == 0) {
+ ok = 0;
+ stp->size = st.st_size;
+ stp->mtime = st.st_mtime;
+ stp->is_directory = S_ISDIR(st.st_mode);
+ } else {
+ ok = -1;
+ }
+
+ return ok;
+}
+
+static void set_close_on_exec(int fd) {
+ (void) fcntl(fd, F_SETFD, FD_CLOEXEC);
+}
+
+int mg_start_thread(mg_thread_func_t func, void *param) {
+ pthread_t thread_id;
+ pthread_attr_t attr;
+
+ (void) pthread_attr_init(&attr);
+ (void) pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_DETACHED);
+ // TODO(lsm): figure out why mongoose dies on Linux if next line is enabled
+ // (void) pthread_attr_setstacksize(&attr, sizeof(struct mg_connection) * 5);
+
+ return pthread_create(&thread_id, &attr, func, param);
+}
+
+#ifndef NO_CGI
+static pid_t spawn_process(struct mg_connection *conn, const char *prog,
+ char *envblk, char *envp[], int fd_stdin,
+ int fd_stdout, const char *dir) {
+ pid_t pid;
+ const char *interp;
+
+ envblk = NULL; // Unused
+
+ if ((pid = fork()) == -1) {
+ // Parent
+ send_http_error(conn, 500, http_500_error, "fork(): %s", strerror(ERRNO));
+ } else if (pid == 0) {
+ // Child
+ if (chdir(dir) != 0) {
+ cry(conn, "%s: chdir(%s): %s", __func__, dir, strerror(ERRNO));
+ } else if (dup2(fd_stdin, 0) == -1) {
+ cry(conn, "%s: dup2(%d, 0): %s", __func__, fd_stdin, strerror(ERRNO));
+ } else if (dup2(fd_stdout, 1) == -1) {
+ cry(conn, "%s: dup2(%d, 1): %s", __func__, fd_stdout, strerror(ERRNO));
+ } else {
+ (void) dup2(fd_stdout, 2);
+ (void) close(fd_stdin);
+ (void) close(fd_stdout);
+
+ interp = conn->ctx->config[CGI_INTERPRETER];
+ if (interp == NULL) {
+ (void) execle(prog, prog, NULL, envp);
+ cry(conn, "%s: execle(%s): %s", __func__, prog, strerror(ERRNO));
+ } else {
+ (void) execle(interp, interp, prog, NULL, envp);
+ cry(conn, "%s: execle(%s %s): %s", __func__, interp, prog,
+ strerror(ERRNO));
+ }
+ }
+ exit(EXIT_FAILURE);
+ }
+
+ // Parent. Close stdio descriptors
+ (void) close(fd_stdin);
+ (void) close(fd_stdout);
+
+ return pid;
+}
+#endif // !NO_CGI
+
+static int set_non_blocking_mode(SOCKET sock) {
+ int flags;
+
+ flags = fcntl(sock, F_GETFL, 0);
+ (void) fcntl(sock, F_SETFL, flags | O_NONBLOCK);
+
+ return 0;
+}
+#endif // _WIN32
+
+// Write data to the IO channel - opened file descriptor, socket or SSL
+// descriptor. Return number of bytes written.
+static int64_t push(FILE *fp, SOCKET sock, SSL *ssl, const char *buf,
+ int64_t len) {
+ int64_t sent;
+ int n, k;
+
+ sent = 0;
+ while (sent < len) {
+
+ // How many bytes we send in this iteration
+ k = len - sent > INT_MAX ? INT_MAX : (int) (len - sent);
+
+ if (ssl != NULL) {
+ n = SSL_write(ssl, buf + sent, k);
+ } else if (fp != NULL) {
+ n = (int) fwrite(buf + sent, 1, (size_t) k, fp);
+ if (ferror(fp))
+ n = -1;
+ } else {
+ n = send(sock, buf + sent, (size_t) k, MSG_NOSIGNAL);
+ }
+
+ if (n < 0)
+ break;
+
+ sent += n;
+ }
+
+ return sent;
+}
+
+// This function is needed to prevent Mongoose to be stuck in a blocking
+// socket read when user requested exit. To do that, we sleep in select
+// with a timeout, and when returned, check the context for the stop flag.
+// If it is set, we return 0, and this means that we must not continue
+// reading, must give up and close the connection and exit serving thread.
+static int wait_until_socket_is_readable(struct mg_connection *conn) {
+ int result;
+ struct timeval tv;
+ fd_set set;
+
+ do {
+ tv.tv_sec = 0;
+ tv.tv_usec = 300 * 1000;
+ FD_ZERO(&set);
+ FD_SET(conn->client.sock, &set);
+ result = select(conn->client.sock + 1, &set, NULL, NULL, &tv);
+ } while ((result == 0 || (result < 0 && ERRNO == EINTR)) &&
+ conn->ctx->stop_flag == 0);
+
+ return conn->ctx->stop_flag || result < 0 ? 0 : 1;
+}
+
+// Read from IO channel - opened file descriptor, socket, or SSL descriptor.
+// Return negative value on error, or number of bytes read on success.
+static int pull(FILE *fp, struct mg_connection *conn, char *buf, int len) {
+ int nread;
+
+ if (fp != NULL) {
+ // Use read() instead of fread(), because if we're reading from the CGI
+ // pipe, fread() may block until IO buffer is filled up. We cannot afford
+ // to block and must pass all read bytes immediately to the client.
+ nread = read(fileno(fp), buf, (size_t) len);
+ } else if (!wait_until_socket_is_readable(conn)) {
+ nread = -1;
+ } else if (conn->ssl != NULL) {
+ nread = SSL_read(conn->ssl, buf, len);
+ } else {
+ nread = recv(conn->client.sock, buf, (size_t) len, 0);
+ }
+
+ return conn->ctx->stop_flag ? -1 : nread;
+}
+
+int mg_read(struct mg_connection *conn, void *buf, size_t len) {
+ int n, buffered_len, nread;
+ const char *body;
+
+ nread = 0;
+ if (conn->consumed_content < conn->content_len) {
+ // Adjust number of bytes to read.
+ int64_t to_read = conn->content_len - conn->consumed_content;
+ if (to_read < (int64_t) len) {
+ len = (size_t) to_read;
+ }
+
+ // Return buffered data
+ body = conn->buf + conn->request_len + conn->consumed_content;
+ buffered_len = &conn->buf[conn->data_len] - body;
+ if (buffered_len > 0) {
+ if (len < (size_t) buffered_len) {
+ buffered_len = (int) len;
+ }
+ memcpy(buf, body, (size_t) buffered_len);
+ len -= buffered_len;
+ conn->consumed_content += buffered_len;
+ nread += buffered_len;
+ buf = (char *) buf + buffered_len;
+ }
+
+ // We have returned all buffered data. Read new data from the remote socket.
+ while (len > 0) {
+ n = pull(NULL, conn, (char *) buf, (int) len);
+ if (n < 0) {
+ nread = n; // Propagate the error
+ break;
+ } else if (n == 0) {
+ break; // No more data to read
+ } else {
+ buf = (char *) buf + n;
+ conn->consumed_content += n;
+ nread += n;
+ len -= n;
+ }
+ }
+ }
+ return nread;
+}
+
+int mg_write(struct mg_connection *conn, const void *buf, size_t len) {
+ time_t now;
+ int64_t n, total, allowed;
+
+ if (conn->throttle > 0) {
+ if ((now = time(NULL)) != conn->last_throttle_time) {
+ conn->last_throttle_time = now;
+ conn->last_throttle_bytes = 0;
+ }
+ allowed = conn->throttle - conn->last_throttle_bytes;
+ if (allowed > (int64_t) len) {
+ allowed = len;
+ }
+ if ((total = push(NULL, conn->client.sock, conn->ssl, (const char *) buf,
+ (int64_t) allowed)) == allowed) {
+ buf = (char *) buf + total;
+ conn->last_throttle_bytes += total;
+ while (total < (int64_t) len && conn->ctx->stop_flag == 0) {
+ allowed = conn->throttle > (int64_t) len - total ?
+ len - total : conn->throttle;
+ if ((n = push(NULL, conn->client.sock, conn->ssl, (const char *) buf,
+ (int64_t) allowed)) != allowed) {
+ break;
+ }
+ sleep(1);
+ conn->last_throttle_bytes = allowed;
+ conn->last_throttle_time = time(NULL);
+ buf = (char *) buf + n;
+ total += n;
+ }
+ }
+ } else {
+ total = push(NULL, conn->client.sock, conn->ssl, (const char *) buf,
+ (int64_t) len);
+ }
+ return (int) total;
+}
+
+int mg_printf(struct mg_connection *conn, const char *fmt, ...) {
+ char mem[MG_BUF_LEN], *buf = mem;
+ int len;
+ va_list ap;
+
+ // Print in a local buffer first, hoping that it is large enough to
+ // hold the whole message
+ va_start(ap, fmt);
+ len = vsnprintf(mem, sizeof(mem), fmt, ap);
+ va_end(ap);
+
+ if (len == 0) {
+ // Do nothing. mg_printf(conn, "%s", "") was called.
+ } else if (len < 0) {
+ // vsnprintf() error, give up
+ len = -1;
+ cry(conn, "%s(%s, ...): vsnprintf() error", __func__, fmt);
+ } else if (len > (int) sizeof(mem) && (buf = (char *) malloc(len + 1)) != NULL) {
+ // Local buffer is not large enough, allocate big buffer on heap
+ va_start(ap, fmt);
+ vsnprintf(buf, len + 1, fmt, ap);
+ va_end(ap);
+ len = mg_write(conn, buf, (size_t) len);
+ free(buf);
+ } else if (len > (int) sizeof(mem)) {
+ // Failed to allocate large enough buffer, give up
+ cry(conn, "%s(%s, ...): Can't allocate %d bytes, not printing anything",
+ __func__, fmt, len);
+ len = -1;
+ } else {
+ // Copy to the local buffer succeeded
+ len = mg_write(conn, buf, (size_t) len);
+ }
+
+ return len;
+}
+
+// URL-decode input buffer into destination buffer.
+// 0-terminate the destination buffer. Return the length of decoded data.
+// form-url-encoded data differs from URI encoding in a way that it
+// uses '+' as character for space, see RFC 1866 section 8.2.1
+// http://ftp.ics.uci.edu/pub/ietf/html/rfc1866.txt
+static size_t url_decode(const char *src, size_t src_len, char *dst,
+ size_t dst_len, int is_form_url_encoded) {
+ size_t i, j;
+ int a, b;
+#define HEXTOI(x) (isdigit(x) ? x - '0' : x - 'W')
+
+ for (i = j = 0; i < src_len && j < dst_len - 1; i++, j++) {
+ if (src[i] == '%' &&
+ isxdigit(* (const unsigned char *) (src + i + 1)) &&
+ isxdigit(* (const unsigned char *) (src + i + 2))) {
+ a = tolower(* (const unsigned char *) (src + i + 1));
+ b = tolower(* (const unsigned char *) (src + i + 2));
+ dst[j] = (char) ((HEXTOI(a) << 4) | HEXTOI(b));
+ i += 2;
+ } else if (is_form_url_encoded && src[i] == '+') {
+ dst[j] = ' ';
+ } else {
+ dst[j] = src[i];
+ }
+ }
+
+ dst[j] = '\0'; // Null-terminate the destination
+
+ return j;
+}
+
+// Scan given buffer and fetch the value of the given variable.
+// It can be specified in query string, or in the POST data.
+// Return -1 if the variable not found, or length of the URL-decoded value
+// stored in dst. The dst buffer is guaranteed to be NUL-terminated if it
+// is not NULL or zero-length. If dst is NULL or zero-length, then
+// -2 is returned.
+int mg_get_var(const char *buf, size_t buf_len, const char *name,
+ char *dst, size_t dst_len) {
+ const char *p, *e, *s;
+ size_t name_len;
+ int len;
+
+ if (dst == NULL || dst_len == 0) {
+ len = -2;
+ } else if (buf == NULL || name == NULL || buf_len == 0) {
+ len = -1;
+ dst[0] = '\0';
+ } else {
+ name_len = strlen(name);
+ e = buf + buf_len;
+ len = -1;
+ dst[0] = '\0';
+
+ // buf is "var1=val1&var2=val2...". Find variable first
+ for (p = buf; p + name_len < e; p++) {
+ if ((p == buf || p[-1] == '&') && p[name_len] == '=' &&
+ !mg_strncasecmp(name, p, name_len)) {
+
+ // Point p to variable value
+ p += name_len + 1;
+
+ // Point s to the end of the value
+ s = (const char *) memchr(p, '&', (size_t)(e - p));
+ if (s == NULL) {
+ s = e;
+ }
+ assert(s >= p);
+
+ // Decode variable into destination buffer
+ if ((size_t) (s - p) < dst_len) {
+ len = (int) url_decode(p, (size_t)(s - p), dst, dst_len, 1);
+ }
+ break;
+ }
+ }
+ }
+
+ return len;
+}
+
+int mg_get_cookie(const struct mg_connection *conn, const char *cookie_name,
+ char *dst, size_t dst_size) {
+ const char *s, *p, *end;
+ int name_len, len = -1;
+
+ dst[0] = '\0';
+ if ((s = mg_get_header(conn, "Cookie")) == NULL) {
+ return -1;
+ }
+
+ name_len = (int) strlen(cookie_name);
+ end = s + strlen(s);
+
+ for (; (s = strstr(s, cookie_name)) != NULL; s += name_len)
+ if (s[name_len] == '=') {
+ s += name_len + 1;
+ if ((p = strchr(s, ' ')) == NULL)
+ p = end;
+ if (p[-1] == ';')
+ p--;
+ if (*s == '"' && p[-1] == '"' && p > s + 1) {
+ s++;
+ p--;
+ }
+ if ((size_t) (p - s) < dst_size) {
+ len = p - s;
+ mg_strlcpy(dst, s, (size_t) len + 1);
+ }
+ break;
+ }
+
+ return len;
+}
+
+static int convert_uri_to_file_name(struct mg_connection *conn, char *buf,
+ size_t buf_len, struct mgstat *st) {
+ struct vec a, b;
+ const char *rewrite, *uri = conn->request_info.uri;
+ char *p;
+ int match_len, stat_result;
+
+ buf_len--; // This is because memmove() for PATH_INFO may shift part
+ // of the path one byte on the right.
+ mg_snprintf(conn, buf, buf_len, "%s%s", conn->ctx->config[DOCUMENT_ROOT],
+ uri);
+
+ rewrite = conn->ctx->config[REWRITE];
+ while ((rewrite = next_option(rewrite, &a, &b)) != NULL) {
+ if ((match_len = match_prefix(a.ptr, a.len, uri)) > 0) {
+ mg_snprintf(conn, buf, buf_len, "%.*s%s", (int) b.len, b.ptr,
+ uri + match_len);
+ break;
+ }
+ }
+
+ if ((stat_result = mg_stat(buf, st)) != 0) {
+ // Support PATH_INFO for CGI scripts.
+ for (p = buf + strlen(buf); p > buf + 1; p--) {
+ if (*p == '/') {
+ *p = '\0';
+ if (match_prefix(conn->ctx->config[CGI_EXTENSIONS],
+ strlen(conn->ctx->config[CGI_EXTENSIONS]), buf) > 0 &&
+ (stat_result = mg_stat(buf, st)) == 0) {
+ // Shift PATH_INFO block one character right, e.g.
+ // "/x.cgi/foo/bar\x00" => "/x.cgi\x00/foo/bar\x00"
+ // conn->path_info is pointing to the local variable "path" declared
+ // in handle_request(), so PATH_INFO is not valid after
+ // handle_request returns.
+ conn->path_info = p + 1;
+ memmove(p + 2, p + 1, strlen(p + 1) + 1); // +1 is for trailing \0
+ p[1] = '/';
+ break;
+ } else {
+ *p = '/';
+ stat_result = -1;
+ }
+ }
+ }
+ }
+
+ return stat_result;
+}
+
+static int sslize(struct mg_connection *conn, SSL_CTX *s, int (*func)(SSL *)) {
+ return (conn->ssl = SSL_new(s)) != NULL &&
+ SSL_set_fd(conn->ssl, conn->client.sock) == 1 &&
+ func(conn->ssl) == 1;
+}
+
+// Check whether full request is buffered. Return:
+// -1 if request is malformed
+// 0 if request is not yet fully buffered
+// >0 actual request length, including last \r\n\r\n
+static int get_request_len(const char *buf, int buflen) {
+ const char *s, *e;
+ int len = 0;
+
+ for (s = buf, e = s + buflen - 1; len <= 0 && s < e; s++)
+ // Control characters are not allowed but >=128 is.
+ if (!isprint(* (const unsigned char *) s) && *s != '\r' &&
+ *s != '\n' && * (const unsigned char *) s < 128) {
+ len = -1;
+ break; // [i_a] abort scan as soon as one malformed character is found; don't let subsequent \r\n\r\n win us over anyhow
+ } else if (s[0] == '\n' && s[1] == '\n') {
+ len = (int) (s - buf) + 2;
+ } else if (s[0] == '\n' && &s[1] < e &&
+ s[1] == '\r' && s[2] == '\n') {
+ len = (int) (s - buf) + 3;
+ }
+
+ return len;
+}
+
+// Convert month to the month number. Return -1 on error, or month number
+static int get_month_index(const char *s) {
+ size_t i;
+
+ for (i = 0; i < ARRAY_SIZE(month_names); i++)
+ if (!strcmp(s, month_names[i]))
+ return (int) i;
+
+ return -1;
+}
+
+static int num_leap_years(int year) {
+ return year / 4 - year / 100 + year / 400;
+}
+
+// Parse UTC date-time string, and return the corresponding time_t value.
+static time_t parse_date_string(const char *datetime) {
+ static const unsigned short days_before_month[] = {
+ 0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334
+ };
+ char month_str[32];
+ int second, minute, hour, day, month, year, leap_days, days;
+ time_t result = (time_t) 0;
+
+ if (((sscanf(datetime, "%d/%3s/%d %d:%d:%d",
+ &day, month_str, &year, &hour, &minute, &second) == 6) ||
+ (sscanf(datetime, "%d %3s %d %d:%d:%d",
+ &day, month_str, &year, &hour, &minute, &second) == 6) ||
+ (sscanf(datetime, "%*3s, %d %3s %d %d:%d:%d",
+ &day, month_str, &year, &hour, &minute, &second) == 6) ||
+ (sscanf(datetime, "%d-%3s-%d %d:%d:%d",
+ &day, month_str, &year, &hour, &minute, &second) == 6)) &&
+ year > 1970 &&
+ (month = get_month_index(month_str)) != -1) {
+ leap_days = num_leap_years(year) - num_leap_years(1970);
+ year -= 1970;
+ days = year * 365 + days_before_month[month] + (day - 1) + leap_days;
+ result = days * 24 * 3600 + hour * 3600 + minute * 60 + second;
+ }
+
+ return result;
+}
+
+// Protect against directory disclosure attack by removing '..',
+// excessive '/' and '\' characters
+static void remove_double_dots_and_double_slashes(char *s) {
+ char *p = s;
+
+ while (*s != '\0') {
+ *p++ = *s++;
+ if (s[-1] == '/' || s[-1] == '\\') {
+ // Skip all following slashes, backslashes and double-dots
+ while (s[0] != '\0') {
+ if (s[0] == '/' || s[0] == '\\') {
+ s++;
+ } else if (s[0] == '.' && s[1] == '.') {
+ s += 2;
+ } else {
+ break;
+ }
+ }
+ }
+ }
+ *p = '\0';
+}
+
+static const struct {
+ const char *extension;
+ size_t ext_len;
+ const char *mime_type;
+} builtin_mime_types[] = {
+ {".html", 5, "text/html"},
+ {".htm", 4, "text/html"},
+ {".shtm", 5, "text/html"},
+ {".shtml", 6, "text/html"},
+ {".css", 4, "text/css"},
+ {".js", 3, "application/x-javascript"},
+ {".ico", 4, "image/x-icon"},
+ {".gif", 4, "image/gif"},
+ {".jpg", 4, "image/jpeg"},
+ {".jpeg", 5, "image/jpeg"},
+ {".png", 4, "image/png"},
+ {".svg", 4, "image/svg+xml"},
+ {".txt", 4, "text/plain"},
+ {".torrent", 8, "application/x-bittorrent"},
+ {".wav", 4, "audio/x-wav"},
+ {".mp3", 4, "audio/x-mp3"},
+ {".mid", 4, "audio/mid"},
+ {".m3u", 4, "audio/x-mpegurl"},
+ {".ram", 4, "audio/x-pn-realaudio"},
+ {".xml", 4, "text/xml"},
+ {".json", 5, "text/json"},
+ {".xslt", 5, "application/xml"},
+ {".ra", 3, "audio/x-pn-realaudio"},
+ {".doc", 4, "application/msword"},
+ {".exe", 4, "application/octet-stream"},
+ {".zip", 4, "application/x-zip-compressed"},
+ {".xls", 4, "application/excel"},
+ {".tgz", 4, "application/x-tar-gz"},
+ {".tar", 4, "application/x-tar"},
+ {".gz", 3, "application/x-gunzip"},
+ {".arj", 4, "application/x-arj-compressed"},
+ {".rar", 4, "application/x-arj-compressed"},
+ {".rtf", 4, "application/rtf"},
+ {".pdf", 4, "application/pdf"},
+ {".swf", 4, "application/x-shockwave-flash"},
+ {".mpg", 4, "video/mpeg"},
+ {".webm", 5, "video/webm"},
+ {".mpeg", 5, "video/mpeg"},
+ {".mp4", 4, "video/mp4"},
+ {".m4v", 4, "video/x-m4v"},
+ {".asf", 4, "video/x-ms-asf"},
+ {".avi", 4, "video/x-msvideo"},
+ {".bmp", 4, "image/bmp"},
+ {NULL, 0, NULL}
+};
+
+const char *mg_get_builtin_mime_type(const char *path) {
+ const char *ext;
+ size_t i, path_len;
+
+ path_len = strlen(path);
+
+ for (i = 0; builtin_mime_types[i].extension != NULL; i++) {
+ ext = path + (path_len - builtin_mime_types[i].ext_len);
+ if (path_len > builtin_mime_types[i].ext_len &&
+ mg_strcasecmp(ext, builtin_mime_types[i].extension) == 0) {
+ return builtin_mime_types[i].mime_type;
+ }
+ }
+
+ return "text/plain";
+}
+
+// Look at the "path" extension and figure what mime type it has.
+// Store mime type in the vector.
+static void get_mime_type(struct mg_context *ctx, const char *path,
+ struct vec *vec) {
+ struct vec ext_vec, mime_vec;
+ const char *list, *ext;
+ size_t path_len;
+
+ path_len = strlen(path);
+
+ // Scan user-defined mime types first, in case user wants to
+ // override default mime types.
+ list = ctx->config[EXTRA_MIME_TYPES];
+ while ((list = next_option(list, &ext_vec, &mime_vec)) != NULL) {
+ // ext now points to the path suffix
+ ext = path + path_len - ext_vec.len;
+ if (mg_strncasecmp(ext, ext_vec.ptr, ext_vec.len) == 0) {
+ *vec = mime_vec;
+ return;
+ }
+ }
+
+ vec->ptr = mg_get_builtin_mime_type(path);
+ vec->len = strlen(vec->ptr);
+}
+
+#ifndef HAVE_MD5
+typedef struct MD5Context {
+ uint32_t buf[4];
+ uint32_t bits[2];
+ unsigned char in[64];
+} MD5_CTX;
+
+#if defined(__BYTE_ORDER) && (__BYTE_ORDER == 1234)
+#define byteReverse(buf, len) // Do nothing
+#else
+static void byteReverse(unsigned char *buf, unsigned longs) {
+ uint32_t t;
+ do {
+ t = (uint32_t) ((unsigned) buf[3] << 8 | buf[2]) << 16 |
+ ((unsigned) buf[1] << 8 | buf[0]);
+ *(uint32_t *) buf = t;
+ buf += 4;
+ } while (--longs);
+}
+#endif
+
+#define F1(x, y, z) (z ^ (x & (y ^ z)))
+#define F2(x, y, z) F1(z, x, y)
+#define F3(x, y, z) (x ^ y ^ z)
+#define F4(x, y, z) (y ^ (x | ~z))
+
+#define MD5STEP(f, w, x, y, z, data, s) \
+ ( w += f(x, y, z) + data, w = w<<s | w>>(32-s), w += x )
+
+// Start MD5 accumulation. Set bit count to 0 and buffer to mysterious
+// initialization constants.
+static void MD5Init(MD5_CTX *ctx) {
+ ctx->buf[0] = 0x67452301;
+ ctx->buf[1] = 0xefcdab89;
+ ctx->buf[2] = 0x98badcfe;
+ ctx->buf[3] = 0x10325476;
+
+ ctx->bits[0] = 0;
+ ctx->bits[1] = 0;
+}
+
+static void MD5Transform(uint32_t buf[4], uint32_t const in[16]) {
+ register uint32_t a, b, c, d;
+
+ a = buf[0];
+ b = buf[1];
+ c = buf[2];
+ d = buf[3];
+
+ MD5STEP(F1, a, b, c, d, in[0] + 0xd76aa478, 7);
+ MD5STEP(F1, d, a, b, c, in[1] + 0xe8c7b756, 12);
+ MD5STEP(F1, c, d, a, b, in[2] + 0x242070db, 17);
+ MD5STEP(F1, b, c, d, a, in[3] + 0xc1bdceee, 22);
+ MD5STEP(F1, a, b, c, d, in[4] + 0xf57c0faf, 7);
+ MD5STEP(F1, d, a, b, c, in[5] + 0x4787c62a, 12);
+ MD5STEP(F1, c, d, a, b, in[6] + 0xa8304613, 17);
+ MD5STEP(F1, b, c, d, a, in[7] + 0xfd469501, 22);
+ MD5STEP(F1, a, b, c, d, in[8] + 0x698098d8, 7);
+ MD5STEP(F1, d, a, b, c, in[9] + 0x8b44f7af, 12);
+ MD5STEP(F1, c, d, a, b, in[10] + 0xffff5bb1, 17);
+ MD5STEP(F1, b, c, d, a, in[11] + 0x895cd7be, 22);
+ MD5STEP(F1, a, b, c, d, in[12] + 0x6b901122, 7);
+ MD5STEP(F1, d, a, b, c, in[13] + 0xfd987193, 12);
+ MD5STEP(F1, c, d, a, b, in[14] + 0xa679438e, 17);
+ MD5STEP(F1, b, c, d, a, in[15] + 0x49b40821, 22);
+
+ MD5STEP(F2, a, b, c, d, in[1] + 0xf61e2562, 5);
+ MD5STEP(F2, d, a, b, c, in[6] + 0xc040b340, 9);
+ MD5STEP(F2, c, d, a, b, in[11] + 0x265e5a51, 14);
+ MD5STEP(F2, b, c, d, a, in[0] + 0xe9b6c7aa, 20);
+ MD5STEP(F2, a, b, c, d, in[5] + 0xd62f105d, 5);
+ MD5STEP(F2, d, a, b, c, in[10] + 0x02441453, 9);
+ MD5STEP(F2, c, d, a, b, in[15] + 0xd8a1e681, 14);
+ MD5STEP(F2, b, c, d, a, in[4] + 0xe7d3fbc8, 20);
+ MD5STEP(F2, a, b, c, d, in[9] + 0x21e1cde6, 5);
+ MD5STEP(F2, d, a, b, c, in[14] + 0xc33707d6, 9);
+ MD5STEP(F2, c, d, a, b, in[3] + 0xf4d50d87, 14);
+ MD5STEP(F2, b, c, d, a, in[8] + 0x455a14ed, 20);
+ MD5STEP(F2, a, b, c, d, in[13] + 0xa9e3e905, 5);
+ MD5STEP(F2, d, a, b, c, in[2] + 0xfcefa3f8, 9);
+ MD5STEP(F2, c, d, a, b, in[7] + 0x676f02d9, 14);
+ MD5STEP(F2, b, c, d, a, in[12] + 0x8d2a4c8a, 20);
+
+ MD5STEP(F3, a, b, c, d, in[5] + 0xfffa3942, 4);
+ MD5STEP(F3, d, a, b, c, in[8] + 0x8771f681, 11);
+ MD5STEP(F3, c, d, a, b, in[11] + 0x6d9d6122, 16);
+ MD5STEP(F3, b, c, d, a, in[14] + 0xfde5380c, 23);
+ MD5STEP(F3, a, b, c, d, in[1] + 0xa4beea44, 4);
+ MD5STEP(F3, d, a, b, c, in[4] + 0x4bdecfa9, 11);
+ MD5STEP(F3, c, d, a, b, in[7] + 0xf6bb4b60, 16);
+ MD5STEP(F3, b, c, d, a, in[10] + 0xbebfbc70, 23);
+ MD5STEP(F3, a, b, c, d, in[13] + 0x289b7ec6, 4);
+ MD5STEP(F3, d, a, b, c, in[0] + 0xeaa127fa, 11);
+ MD5STEP(F3, c, d, a, b, in[3] + 0xd4ef3085, 16);
+ MD5STEP(F3, b, c, d, a, in[6] + 0x04881d05, 23);
+ MD5STEP(F3, a, b, c, d, in[9] + 0xd9d4d039, 4);
+ MD5STEP(F3, d, a, b, c, in[12] + 0xe6db99e5, 11);
+ MD5STEP(F3, c, d, a, b, in[15] + 0x1fa27cf8, 16);
+ MD5STEP(F3, b, c, d, a, in[2] + 0xc4ac5665, 23);
+
+ MD5STEP(F4, a, b, c, d, in[0] + 0xf4292244, 6);
+ MD5STEP(F4, d, a, b, c, in[7] + 0x432aff97, 10);
+ MD5STEP(F4, c, d, a, b, in[14] + 0xab9423a7, 15);
+ MD5STEP(F4, b, c, d, a, in[5] + 0xfc93a039, 21);
+ MD5STEP(F4, a, b, c, d, in[12] + 0x655b59c3, 6);
+ MD5STEP(F4, d, a, b, c, in[3] + 0x8f0ccc92, 10);
+ MD5STEP(F4, c, d, a, b, in[10] + 0xffeff47d, 15);
+ MD5STEP(F4, b, c, d, a, in[1] + 0x85845dd1, 21);
+ MD5STEP(F4, a, b, c, d, in[8] + 0x6fa87e4f, 6);
+ MD5STEP(F4, d, a, b, c, in[15] + 0xfe2ce6e0, 10);
+ MD5STEP(F4, c, d, a, b, in[6] + 0xa3014314, 15);
+ MD5STEP(F4, b, c, d, a, in[13] + 0x4e0811a1, 21);
+ MD5STEP(F4, a, b, c, d, in[4] + 0xf7537e82, 6);
+ MD5STEP(F4, d, a, b, c, in[11] + 0xbd3af235, 10);
+ MD5STEP(F4, c, d, a, b, in[2] + 0x2ad7d2bb, 15);
+ MD5STEP(F4, b, c, d, a, in[9] + 0xeb86d391, 21);
+
+ buf[0] += a;
+ buf[1] += b;
+ buf[2] += c;
+ buf[3] += d;
+}
+
+static void MD5Update(MD5_CTX *ctx, unsigned char const *buf, unsigned len) {
+ uint32_t t;
+
+ t = ctx->bits[0];
+ if ((ctx->bits[0] = t + ((uint32_t) len << 3)) < t)
+ ctx->bits[1]++;
+ ctx->bits[1] += len >> 29;
+
+ t = (t >> 3) & 0x3f;
+
+ if (t) {
+ unsigned char *p = (unsigned char *) ctx->in + t;
+
+ t = 64 - t;
+ if (len < t) {
+ memcpy(p, buf, len);
+ return;
+ }
+ memcpy(p, buf, t);
+ byteReverse(ctx->in, 16);
+ MD5Transform(ctx->buf, (uint32_t *) ctx->in);
+ buf += t;
+ len -= t;
+ }
+
+ while (len >= 64) {
+ memcpy(ctx->in, buf, 64);
+ byteReverse(ctx->in, 16);
+ MD5Transform(ctx->buf, (uint32_t *) ctx->in);
+ buf += 64;
+ len -= 64;
+ }
+
+ memcpy(ctx->in, buf, len);
+}
+
+static void MD5Final(unsigned char digest[16], MD5_CTX *ctx) {
+ unsigned count;
+ unsigned char *p;
+
+ count = (ctx->bits[0] >> 3) & 0x3F;
+
+ p = ctx->in + count;
+ *p++ = 0x80;
+ count = 64 - 1 - count;
+ if (count < 8) {
+ memset(p, 0, count);
+ byteReverse(ctx->in, 16);
+ MD5Transform(ctx->buf, (uint32_t *) ctx->in);
+ memset(ctx->in, 0, 56);
+ } else {
+ memset(p, 0, count - 8);
+ }
+ byteReverse(ctx->in, 14);
+
+ ((uint32_t *) ctx->in)[14] = ctx->bits[0];
+ ((uint32_t *) ctx->in)[15] = ctx->bits[1];
+
+ MD5Transform(ctx->buf, (uint32_t *) ctx->in);
+ byteReverse((unsigned char *) ctx->buf, 4);
+ memcpy(digest, ctx->buf, 16);
+ memset((char *) ctx, 0, sizeof(*ctx));
+}
+#endif // !HAVE_MD5
+
+// Stringify binary data. Output buffer must be twice as big as input,
+// because each byte takes 2 bytes in string representation
+static void bin2str(char *to, const unsigned char *p, size_t len) {
+ static const char *hex = "0123456789abcdef";
+
+ for (; len--; p++) {
+ *to++ = hex[p[0] >> 4];
+ *to++ = hex[p[0] & 0x0f];
+ }
+ *to = '\0';
+}
+
+// Return stringified MD5 hash for list of strings. Buffer must be 33 bytes.
+void mg_md5(char buf[33], ...) {
+ unsigned char hash[16];
+ const char *p;
+ va_list ap;
+ MD5_CTX ctx;
+
+ MD5Init(&ctx);
+
+ va_start(ap, buf);
+ while ((p = va_arg(ap, const char *)) != NULL) {
+ MD5Update(&ctx, (const unsigned char *) p, (unsigned) strlen(p));
+ }
+ va_end(ap);
+
+ MD5Final(hash, &ctx);
+ bin2str(buf, hash, sizeof(hash));
+}
+
+// Check the user's password, return 1 if OK
+static int check_password(const char *method, const char *ha1, const char *uri,
+ const char *nonce, const char *nc, const char *cnonce,
+ const char *qop, const char *response) {
+ char ha2[32 + 1], expected_response[32 + 1];
+
+ // Some of the parameters may be NULL
+ if (method == NULL || nonce == NULL || nc == NULL || cnonce == NULL ||
+ qop == NULL || response == NULL) {
+ return 0;
+ }
+
+ // NOTE(lsm): due to a bug in MSIE, we do not compare the URI
+ // TODO(lsm): check for authentication timeout
+ if (// strcmp(dig->uri, c->ouri) != 0 ||
+ strlen(response) != 32
+ // || now - strtoul(dig->nonce, NULL, 10) > 3600
+ ) {
+ return 0;
+ }
+
+ mg_md5(ha2, method, ":", uri, NULL);
+ mg_md5(expected_response, ha1, ":", nonce, ":", nc,
+ ":", cnonce, ":", qop, ":", ha2, NULL);
+
+ return mg_strcasecmp(response, expected_response) == 0;
+}
+
+// Use the global passwords file, if specified by auth_gpass option,
+// or search for .htpasswd in the requested directory.
+static FILE *open_auth_file(struct mg_connection *conn, const char *path) {
+ struct mg_context *ctx = conn->ctx;
+ char name[PATH_MAX];
+ const char *p, *e;
+ struct mgstat st;
+ FILE *fp;
+
+ if (ctx->config[GLOBAL_PASSWORDS_FILE] != NULL) {
+ // Use global passwords file
+ fp = mg_fopen(ctx->config[GLOBAL_PASSWORDS_FILE], "r");
+ if (fp == NULL)
+ cry(fc(ctx), "fopen(%s): %s",
+ ctx->config[GLOBAL_PASSWORDS_FILE], strerror(ERRNO));
+ } else if (!mg_stat(path, &st) && st.is_directory) {
+ (void) mg_snprintf(conn, name, sizeof(name), "%s%c%s",
+ path, '/', PASSWORDS_FILE_NAME);
+ fp = mg_fopen(name, "r");
+ } else {
+ // Try to find .htpasswd in requested directory.
+ for (p = path, e = p + strlen(p) - 1; e > p; e--)
+ if (e[0] == '/')
+ break;
+ (void) mg_snprintf(conn, name, sizeof(name), "%.*s%c%s",
+ (int) (e - p), p, '/', PASSWORDS_FILE_NAME);
+ fp = mg_fopen(name, "r");
+ }
+
+ return fp;
+}
+
+// Parsed Authorization header
+struct ah {
+ char *user, *uri, *cnonce, *response, *qop, *nc, *nonce;
+};
+
+// Return 1 on success. Always initializes the ah structure.
+static int parse_auth_header(struct mg_connection *conn, char *buf,
+ size_t buf_size, struct ah *ah) {
+ char *name, *value, *s;
+ const char *auth_header;
+
+ (void) memset(ah, 0, sizeof(*ah));
+ if ((auth_header = mg_get_header(conn, "Authorization")) == NULL ||
+ mg_strncasecmp(auth_header, "Digest ", 7) != 0) {
+ return 0;
+ }
+
+ // Make modifiable copy of the auth header
+ (void) mg_strlcpy(buf, auth_header + 7, buf_size);
+ s = buf;
+
+ // Parse authorization header
+ for (;;) {
+ // Gobble initial spaces
+ while (isspace(* (unsigned char *) s)) {
+ s++;
+ }
+ name = skip_quoted(&s, "=", " ", 0);
+ // Value is either quote-delimited, or ends at first comma or space.
+ if (s[0] == '\"') {
+ s++;
+ value = skip_quoted(&s, "\"", " ", '\\');
+ if (s[0] == ',') {
+ s++;
+ }
+ } else {
+ value = skip_quoted(&s, ", ", " ", 0); // IE uses commas, FF uses spaces
+ }
+ if (*name == '\0') {
+ break;
+ }
+
+ if (!strcmp(name, "username")) {
+ ah->user = value;
+ } else if (!strcmp(name, "cnonce")) {
+ ah->cnonce = value;
+ } else if (!strcmp(name, "response")) {
+ ah->response = value;
+ } else if (!strcmp(name, "uri")) {
+ ah->uri = value;
+ } else if (!strcmp(name, "qop")) {
+ ah->qop = value;
+ } else if (!strcmp(name, "nc")) {
+ ah->nc = value;
+ } else if (!strcmp(name, "nonce")) {
+ ah->nonce = value;
+ }
+ }
+
+ // CGI needs it as REMOTE_USER
+ if (ah->user != NULL) {
+ conn->request_info.remote_user = mg_strdup(ah->user);
+ } else {
+ return 0;
+ }
+
+ return 1;
+}
+
+// Authorize against the opened passwords file. Return 1 if authorized.
+static int authorize(struct mg_connection *conn, FILE *fp) {
+ struct ah ah;
+ char line[256], f_user[256], ha1[256], f_domain[256], buf[MG_BUF_LEN];
+
+ if (!parse_auth_header(conn, buf, sizeof(buf), &ah)) {
+ return 0;
+ }
+
+ // Loop over passwords file
+ while (fgets(line, sizeof(line), fp) != NULL) {
+ if (sscanf(line, "%[^:]:%[^:]:%s", f_user, f_domain, ha1) != 3) {
+ continue;
+ }
+
+ if (!strcmp(ah.user, f_user) &&
+ !strcmp(conn->ctx->config[AUTHENTICATION_DOMAIN], f_domain))
+ return check_password(
+ conn->request_info.request_method,
+ ha1, ah.uri, ah.nonce, ah.nc, ah.cnonce, ah.qop,
+ ah.response);
+ }
+
+ return 0;
+}
+
+// Return 1 if request is authorised, 0 otherwise.
+static int check_authorization(struct mg_connection *conn, const char *path) {
+ FILE *fp;
+ char fname[PATH_MAX];
+ struct vec uri_vec, filename_vec;
+ const char *list;
+ int authorized;
+
+ fp = NULL;
+ authorized = 1;
+
+ list = conn->ctx->config[PROTECT_URI];
+ while ((list = next_option(list, &uri_vec, &filename_vec)) != NULL) {
+ if (!memcmp(conn->request_info.uri, uri_vec.ptr, uri_vec.len)) {
+ mg_snprintf(conn, fname, sizeof(fname), "%.*s",
+ (int) filename_vec.len, filename_vec.ptr);
+ if ((fp = mg_fopen(fname, "r")) == NULL) {
+ cry(conn, "%s: cannot open %s: %s", __func__, fname, strerror(errno));
+ }
+ break;
+ }
+ }
+
+ if (fp == NULL) {
+ fp = open_auth_file(conn, path);
+ }
+
+ if (fp != NULL) {
+ authorized = authorize(conn, fp);
+ (void) fclose(fp);
+ }
+
+ return authorized;
+}
+
+static void send_authorization_request(struct mg_connection *conn) {
+ conn->status_code = 401;
+ (void) mg_printf(conn,
+ "HTTP/1.1 401 Unauthorized\r\n"
+ "Content-Length: 0\r\n"
+ "WWW-Authenticate: Digest qop=\"auth\", "
+ "realm=\"%s\", nonce=\"%lu\"\r\n\r\n",
+ conn->ctx->config[AUTHENTICATION_DOMAIN],
+ (unsigned long) time(NULL));
+}
+
+static int is_authorized_for_put(struct mg_connection *conn) {
+ FILE *fp;
+ int ret = 0;
+
+ fp = conn->ctx->config[PUT_DELETE_PASSWORDS_FILE] == NULL ? NULL :
+ mg_fopen(conn->ctx->config[PUT_DELETE_PASSWORDS_FILE], "r");
+
+ if (fp != NULL) {
+ ret = authorize(conn, fp);
+ (void) fclose(fp);
+ }
+
+ return ret;
+}
+
+int mg_modify_passwords_file(const char *fname, const char *domain,
+ const char *user, const char *pass) {
+ int found;
+ char line[512], u[512], d[512], ha1[33], tmp[PATH_MAX];
+ FILE *fp, *fp2;
+
+ found = 0;
+ fp = fp2 = NULL;
+
+ // Regard empty password as no password - remove user record.
+ if (pass != NULL && pass[0] == '\0') {
+ pass = NULL;
+ }
+
+ (void) snprintf(tmp, sizeof(tmp), "%s.tmp", fname);
+
+ // Create the file if does not exist
+ if ((fp = mg_fopen(fname, "a+")) != NULL) {
+ (void) fclose(fp);
+ }
+
+ // Open the given file and temporary file
+ if ((fp = mg_fopen(fname, "r")) == NULL) {
+ return 0;
+ } else if ((fp2 = mg_fopen(tmp, "w+")) == NULL) {
+ fclose(fp);
+ return 0;
+ }
+
+ // Copy the stuff to temporary file
+ while (fgets(line, sizeof(line), fp) != NULL) {
+ if (sscanf(line, "%[^:]:%[^:]:%*s", u, d) != 2) {
+ continue;
+ }
+
+ if (!strcmp(u, user) && !strcmp(d, domain)) {
+ found++;
+ if (pass != NULL) {
+ mg_md5(ha1, user, ":", domain, ":", pass, NULL);
+ fprintf(fp2, "%s:%s:%s\n", user, domain, ha1);
+ }
+ } else {
+ (void) fprintf(fp2, "%s", line);
+ }
+ }
+
+ // If new user, just add it
+ if (!found && pass != NULL) {
+ mg_md5(ha1, user, ":", domain, ":", pass, NULL);
+ (void) fprintf(fp2, "%s:%s:%s\n", user, domain, ha1);
+ }
+
+ // Close files
+ (void) fclose(fp);
+ (void) fclose(fp2);
+
+ // Put the temp file in place of real file
+ (void) mg_remove(fname);
+ (void) mg_rename(tmp, fname);
+
+ return 1;
+}
+
+struct de {
+ struct mg_connection *conn;
+ char *file_name;
+ struct mgstat st;
+};
+
+static void url_encode(const char *src, char *dst, size_t dst_len) {
+ static const char *dont_escape = "._-$,;~()";
+ static const char *hex = "0123456789abcdef";
+ const char *end = dst + dst_len - 1;
+
+ for (; *src != '\0' && dst < end; src++, dst++) {
+ if (isalnum(*(const unsigned char *) src) ||
+ strchr(dont_escape, * (const unsigned char *) src) != NULL) {
+ *dst = *src;
+ } else if (dst + 2 < end) {
+ dst[0] = '%';
+ dst[1] = hex[(* (const unsigned char *) src) >> 4];
+ dst[2] = hex[(* (const unsigned char *) src) & 0xf];
+ dst += 2;
+ }
+ }
+
+ *dst = '\0';
+}
+
+static void print_dir_entry(struct de *de) {
+ char size[64], mod[64], href[PATH_MAX];
+
+ if (de->st.is_directory) {
+ (void) mg_snprintf(de->conn, size, sizeof(size), "%s", "[DIRECTORY]");
+ } else {
+ // We use (signed) cast below because MSVC 6 compiler cannot
+ // convert unsigned __int64 to double. Sigh.
+ if (de->st.size < 1024) {
+ (void) mg_snprintf(de->conn, size, sizeof(size),
+ "%lu", (unsigned long) de->st.size);
+ } else if (de->st.size < 0x100000) {
+ (void) mg_snprintf(de->conn, size, sizeof(size),
+ "%.1fk", (double) de->st.size / 1024.0);
+ } else if (de->st.size < 0x40000000) {
+ (void) mg_snprintf(de->conn, size, sizeof(size),
+ "%.1fM", (double) de->st.size / 1048576);
+ } else {
+ (void) mg_snprintf(de->conn, size, sizeof(size),
+ "%.1fG", (double) de->st.size / 1073741824);
+ }
+ }
+ (void) strftime(mod, sizeof(mod), "%d-%b-%Y %H:%M", localtime(&de->st.mtime));
+ url_encode(de->file_name, href, sizeof(href));
+ de->conn->num_bytes_sent += mg_printf(de->conn,
+ "<tr><td><a href=\"%s%s%s\">%s%s</a></td>"
+ "<td>&nbsp;%s</td><td>&nbsp;&nbsp;%s</td></tr>\n",
+ de->conn->request_info.uri, href, de->st.is_directory ? "/" : "",
+ de->file_name, de->st.is_directory ? "/" : "", mod, size);
+}
+
+// This function is called from send_directory() and used for
+// sorting directory entries by size, or name, or modification time.
+// On windows, __cdecl specification is needed in case if project is built
+// with __stdcall convention. qsort always requires __cdels callback.
+static int WINCDECL compare_dir_entries(const void *p1, const void *p2) {
+ const struct de *a = (const struct de *) p1, *b = (const struct de *) p2;
+ const char *query_string = a->conn->request_info.query_string;
+ int cmp_result = 0;
+
+ if (query_string == NULL) {
+ query_string = "na";
+ }
+
+ if (a->st.is_directory && !b->st.is_directory) {
+ return -1; // Always put directories on top
+ } else if (!a->st.is_directory && b->st.is_directory) {
+ return 1; // Always put directories on top
+ } else if (*query_string == 'n') {
+ cmp_result = strcmp(a->file_name, b->file_name);
+ } else if (*query_string == 's') {
+ cmp_result = a->st.size == b->st.size ? 0 :
+ a->st.size > b->st.size ? 1 : -1;
+ } else if (*query_string == 'd') {
+ cmp_result = a->st.mtime == b->st.mtime ? 0 :
+ a->st.mtime > b->st.mtime ? 1 : -1;
+ }
+
+ return query_string[1] == 'd' ? -cmp_result : cmp_result;
+}
+
+static int must_hide_file(struct mg_connection *conn, const char *path) {
+ const char *pw_pattern = "**" PASSWORDS_FILE_NAME "$";
+ const char *pattern = conn->ctx->config[HIDE_FILES];
+ return match_prefix(pw_pattern, strlen(pw_pattern), path) > 0 ||
+ (pattern != NULL && match_prefix(pattern, strlen(pattern), path) > 0);
+}
+
+static int scan_directory(struct mg_connection *conn, const char *dir,
+ void *data, void (*cb)(struct de *, void *)) {
+ char path[PATH_MAX];
+ struct dirent *dp;
+ DIR *dirp;
+ struct de de;
+
+ if ((dirp = opendir(dir)) == NULL) {
+ return 0;
+ } else {
+ de.conn = conn;
+
+ while ((dp = readdir(dirp)) != NULL) {
+ // Do not show current dir and hidden files
+ if (!strcmp(dp->d_name, ".") ||
+ !strcmp(dp->d_name, "..") ||
+ must_hide_file(conn, dp->d_name)) {
+ continue;
+ }
+
+ mg_snprintf(conn, path, sizeof(path), "%s%c%s", dir, '/', dp->d_name);
+
+ // If we don't memset stat structure to zero, mtime will have
+ // garbage and strftime() will segfault later on in
+ // print_dir_entry(). memset is required only if mg_stat()
+ // fails. For more details, see
+ // http://code.google.com/p/mongoose/issues/detail?id=79
+ if (mg_stat(path, &de.st) != 0) {
+ memset(&de.st, 0, sizeof(de.st));
+ }
+ de.file_name = dp->d_name;
+
+ cb(&de, data);
+ }
+ (void) closedir(dirp);
+ }
+ return 1;
+}
+
+struct dir_scan_data {
+ struct de *entries;
+ int num_entries;
+ int arr_size;
+};
+
+static void dir_scan_callback(struct de *de, void *data) {
+ struct dir_scan_data *dsd = (struct dir_scan_data *) data;
+
+ if (dsd->entries == NULL || dsd->num_entries >= dsd->arr_size) {
+ dsd->arr_size *= 2;
+ dsd->entries = (struct de *) realloc(dsd->entries, dsd->arr_size *
+ sizeof(dsd->entries[0]));
+ }
+ if (dsd->entries == NULL) {
+ // TODO(lsm): propagate an error to the caller
+ dsd->num_entries = 0;
+ } else {
+ dsd->entries[dsd->num_entries].file_name = mg_strdup(de->file_name);
+ dsd->entries[dsd->num_entries].st = de->st;
+ dsd->entries[dsd->num_entries].conn = de->conn;
+ dsd->num_entries++;
+ }
+}
+
+static void handle_directory_request(struct mg_connection *conn,
+ const char *dir) {
+ int i, sort_direction;
+ struct dir_scan_data data = { NULL, 0, 128 };
+
+ if (!scan_directory(conn, dir, &data, dir_scan_callback)) {
+ send_http_error(conn, 500, "Cannot open directory",
+ "Error: opendir(%s): %s", dir, strerror(ERRNO));
+ return;
+ }
+
+ sort_direction = conn->request_info.query_string != NULL &&
+ conn->request_info.query_string[1] == 'd' ? 'a' : 'd';
+
+ conn->must_close = 1;
+ mg_printf(conn, "%s",
+ "HTTP/1.1 200 OK\r\n"
+ "Connection: close\r\n"
+ "Content-Type: text/html; charset=utf-8\r\n\r\n");
+
+ conn->num_bytes_sent += mg_printf(conn,
+ "<html><head><title>Index of %s</title>"
+ "<style>th {text-align: left;}</style></head>"
+ "<body><h1>Index of %s</h1><pre><table cellpadding=\"0\">"
+ "<tr><th><a href=\"?n%c\">Name</a></th>"
+ "<th><a href=\"?d%c\">Modified</a></th>"
+ "<th><a href=\"?s%c\">Size</a></th></tr>"
+ "<tr><td colspan=\"3\"><hr></td></tr>",
+ conn->request_info.uri, conn->request_info.uri,
+ sort_direction, sort_direction, sort_direction);
+
+ // Print first entry - link to a parent directory
+ conn->num_bytes_sent += mg_printf(conn,
+ "<tr><td><a href=\"%s%s\">%s</a></td>"
+ "<td>&nbsp;%s</td><td>&nbsp;&nbsp;%s</td></tr>\n",
+ conn->request_info.uri, "..", "Parent directory", "-", "-");
+
+ // Sort and print directory entries
+ qsort(data.entries, (size_t) data.num_entries, sizeof(data.entries[0]),
+ compare_dir_entries);
+ for (i = 0; i < data.num_entries; i++) {
+ print_dir_entry(&data.entries[i]);
+ free(data.entries[i].file_name);
+ }
+ free(data.entries);
+
+ conn->num_bytes_sent += mg_printf(conn, "%s", "</table></body></html>");
+ conn->status_code = 200;
+}
+
+// Send len bytes from the opened file to the client.
+static void send_file_data(struct mg_connection *conn, FILE *fp, int64_t len) {
+ char buf[MG_BUF_LEN];
+ int to_read, num_read, num_written;
+
+ while (len > 0) {
+ // Calculate how much to read from the file in the buffer
+ to_read = sizeof(buf);
+ if ((int64_t) to_read > len) {
+ to_read = (int) len;
+ }
+
+ // Read from file, exit the loop on error
+ if ((num_read = fread(buf, 1, (size_t)to_read, fp)) <= 0) {
+ break;
+ }
+
+ // Send read bytes to the client, exit the loop on error
+ if ((num_written = mg_write(conn, buf, (size_t)num_read)) != num_read) {
+ break;
+ }
+
+ // Both read and were successful, adjust counters
+ conn->num_bytes_sent += num_written;
+ len -= num_written;
+ }
+}
+
+static int parse_range_header(const char *header, int64_t *a, int64_t *b) {
+ return sscanf(header, "bytes=%" INT64_FMT "-%" INT64_FMT, a, b);
+}
+
+static void gmt_time_string(char *buf, size_t buf_len, time_t *t) {
+ strftime(buf, buf_len, "%a, %d %b %Y %H:%M:%S GMT", gmtime(t));
+}
+
+static void construct_etag(char *buf, size_t buf_len,
+ const struct mgstat *stp) {
+ snprintf(buf, buf_len, "\"%lx.%" INT64_FMT "\"",
+ (unsigned long) stp->mtime, stp->size);
+}
+
+static void handle_file_request(struct mg_connection *conn, const char *path,
+ struct mgstat *stp) {
+ char date[64], lm[64], etag[64], range[64];
+ const char *msg = "OK", *hdr;
+ time_t curtime = time(NULL);
+ int64_t cl, r1, r2;
+ struct vec mime_vec;
+ FILE *fp;
+ int n;
+
+ get_mime_type(conn->ctx, path, &mime_vec);
+ cl = stp->size;
+ conn->status_code = 200;
+ range[0] = '\0';
+
+ if ((fp = mg_fopen(path, "rb")) == NULL) {
+ send_http_error(conn, 500, http_500_error,
+ "fopen(%s): %s", path, strerror(ERRNO));
+ return;
+ }
+ set_close_on_exec(fileno(fp));
+
+ // If Range: header specified, act accordingly
+ r1 = r2 = 0;
+ hdr = mg_get_header(conn, "Range");
+ if (hdr != NULL && (n = parse_range_header(hdr, &r1, &r2)) > 0) {
+ conn->status_code = 206;
+ (void) fseeko(fp, r1, SEEK_SET);
+ cl = n == 2 ? r2 - r1 + 1: cl - r1;
+ (void) mg_snprintf(conn, range, sizeof(range),
+ "Content-Range: bytes "
+ "%" INT64_FMT "-%"
+ INT64_FMT "/%" INT64_FMT "\r\n",
+ r1, r1 + cl - 1, stp->size);
+ msg = "Partial Content";
+ }
+
+ // Prepare Etag, Date, Last-Modified headers. Must be in UTC, according to
+ // http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.3
+ gmt_time_string(date, sizeof(date), &curtime);
+ gmt_time_string(lm, sizeof(lm), &stp->mtime);
+ construct_etag(etag, sizeof(etag), stp);
+
+ (void) mg_printf(conn,
+ "HTTP/1.1 %d %s\r\n"
+ "Date: %s\r\n"
+ "Last-Modified: %s\r\n"
+ "Etag: %s\r\n"
+ "Content-Type: %.*s\r\n"
+ "Content-Length: %" INT64_FMT "\r\n"
+ "Connection: %s\r\n"
+ "Accept-Ranges: bytes\r\n"
+ "%s\r\n",
+ conn->status_code, msg, date, lm, etag, (int) mime_vec.len,
+ mime_vec.ptr, cl, suggest_connection_header(conn), range);
+
+ if (strcmp(conn->request_info.request_method, "HEAD") != 0) {
+ send_file_data(conn, fp, cl);
+ }
+ (void) fclose(fp);
+}
+
+void mg_send_file(struct mg_connection *conn, const char *path) {
+ struct mgstat st;
+ if (mg_stat(path, &st) == 0) {
+ handle_file_request(conn, path, &st);
+ } else {
+ send_http_error(conn, 404, "Not Found", "%s", "File not found");
+ }
+}
+
+
+// Parse HTTP headers from the given buffer, advance buffer to the point
+// where parsing stopped.
+static void parse_http_headers(char **buf, struct mg_request_info *ri) {
+ int i;
+
+ for (i = 0; i < (int) ARRAY_SIZE(ri->http_headers); i++) {
+ ri->http_headers[i].name = skip_quoted(buf, ":", " ", 0);
+ ri->http_headers[i].value = skip(buf, "\r\n");
+ if (ri->http_headers[i].name[0] == '\0')
+ break;
+ ri->num_headers = i + 1;
+ }
+}
+
+static int is_valid_http_method(const char *method) {
+ return !strcmp(method, "GET") || !strcmp(method, "POST") ||
+ !strcmp(method, "HEAD") || !strcmp(method, "CONNECT") ||
+ !strcmp(method, "PUT") || !strcmp(method, "DELETE") ||
+ !strcmp(method, "OPTIONS") || !strcmp(method, "PROPFIND");
+}
+
+// Parse HTTP request, fill in mg_request_info structure.
+// This function modifies the buffer by NUL-terminating
+// HTTP request components, header names and header values.
+static int parse_http_message(char *buf, int len, struct mg_request_info *ri) {
+ int request_length = get_request_len(buf, len);
+ if (request_length > 0) {
+ // Reset attributes. DO NOT TOUCH is_ssl, remote_ip, remote_port
+ ri->remote_user = ri->request_method = ri->uri = ri->http_version = NULL;
+ ri->num_headers = 0;
+
+ buf[request_length - 1] = '\0';
+
+ // RFC says that all initial whitespaces should be ingored
+ while (*buf != '\0' && isspace(* (unsigned char *) buf)) {
+ buf++;
+ }
+ ri->request_method = skip(&buf, " ");
+ ri->uri = skip(&buf, " ");
+ ri->http_version = skip(&buf, "\r\n");
+ parse_http_headers(&buf, ri);
+ }
+ return request_length;
+}
+
+static int parse_http_request(char *buf, int len, struct mg_request_info *ri) {
+ int result = parse_http_message(buf, len, ri);
+ if (result > 0 &&
+ is_valid_http_method(ri->request_method) &&
+ !strncmp(ri->http_version, "HTTP/", 5)) {
+ ri->http_version += 5; // Skip "HTTP/"
+ } else {
+ result = -1;
+ }
+ return result;
+}
+
+static int parse_http_response(char *buf, int len, struct mg_request_info *ri) {
+ int result = parse_http_message(buf, len, ri);
+ return result > 0 && !strncmp(ri->request_method, "HTTP/", 5) ? result : -1;
+}
+
+// Keep reading the input (either opened file descriptor fd, or socket sock,
+// or SSL descriptor ssl) into buffer buf, until \r\n\r\n appears in the
+// buffer (which marks the end of HTTP request). Buffer buf may already
+// have some data. The length of the data is stored in nread.
+// Upon every read operation, increase nread by the number of bytes read.
+static int read_request(FILE *fp, struct mg_connection *conn,
+ char *buf, int bufsiz, int *nread) {
+ int request_len, n = 1;
+
+ request_len = get_request_len(buf, *nread);
+ while (*nread < bufsiz && request_len == 0 && n > 0) {
+ n = pull(fp, conn, buf + *nread, bufsiz - *nread);
+ if (n > 0) {
+ *nread += n;
+ request_len = get_request_len(buf, *nread);
+ }
+ }
+
+ if (n < 0) {
+ // recv() error -> propagate error; do not process a b0rked-with-very-high-probability request
+ return -1;
+ }
+ return request_len;
+}
+
+// For given directory path, substitute it to valid index file.
+// Return 0 if index file has been found, -1 if not found.
+// If the file is found, it's stats is returned in stp.
+static int substitute_index_file(struct mg_connection *conn, char *path,
+ size_t path_len, struct mgstat *stp) {
+ const char *list = conn->ctx->config[INDEX_FILES];
+ struct mgstat st;
+ struct vec filename_vec;
+ size_t n = strlen(path);
+ int found = 0;
+
+ // The 'path' given to us points to the directory. Remove all trailing
+ // directory separator characters from the end of the path, and
+ // then append single directory separator character.
+ while (n > 0 && path[n - 1] == '/') {
+ n--;
+ }
+ path[n] = '/';
+
+ // Traverse index files list. For each entry, append it to the given
+ // path and see if the file exists. If it exists, break the loop
+ while ((list = next_option(list, &filename_vec, NULL)) != NULL) {
+
+ // Ignore too long entries that may overflow path buffer
+ if (filename_vec.len > path_len - (n + 2))
+ continue;
+
+ // Prepare full path to the index file
+ (void) mg_strlcpy(path + n + 1, filename_vec.ptr, filename_vec.len + 1);
+
+ // Does it exist?
+ if (mg_stat(path, &st) == 0) {
+ // Yes it does, break the loop
+ *stp = st;
+ found = 1;
+ break;
+ }
+ }
+
+ // If no index file exists, restore directory path
+ if (!found) {
+ path[n] = '\0';
+ }
+
+ return found;
+}
+
+// Return True if we should reply 304 Not Modified.
+static int is_not_modified(const struct mg_connection *conn,
+ const struct mgstat *stp) {
+ char etag[64];
+ const char *ims = mg_get_header(conn, "If-Modified-Since");
+ const char *inm = mg_get_header(conn, "If-None-Match");
+ construct_etag(etag, sizeof(etag), stp);
+ return (inm != NULL && !mg_strcasecmp(etag, inm)) ||
+ (ims != NULL && stp->mtime <= parse_date_string(ims));
+}
+
+static int forward_body_data(struct mg_connection *conn, FILE *fp,
+ SOCKET sock, SSL *ssl) {
+ const char *expect, *body;
+ char buf[MG_BUF_LEN];
+ int to_read, nread, buffered_len, success = 0;
+
+ expect = mg_get_header(conn, "Expect");
+ assert(fp != NULL);
+
+ if (conn->content_len == -1) {
+ send_http_error(conn, 411, "Length Required", "%s", "");
+ } else if (expect != NULL && mg_strcasecmp(expect, "100-continue")) {
+ send_http_error(conn, 417, "Expectation Failed", "%s", "");
+ } else {
+ if (expect != NULL) {
+ (void) mg_printf(conn, "%s", "HTTP/1.1 100 Continue\r\n\r\n");
+ }
+
+ body = conn->buf + conn->request_len + conn->consumed_content;
+ buffered_len = &conn->buf[conn->data_len] - body;
+ assert(buffered_len >= 0);
+ assert(conn->consumed_content == 0);
+
+ if (buffered_len > 0) {
+ if ((int64_t) buffered_len > conn->content_len) {
+ buffered_len = (int) conn->content_len;
+ }
+ push(fp, sock, ssl, body, (int64_t) buffered_len);
+ conn->consumed_content += buffered_len;
+ }
+
+ nread = 0;
+ while (conn->consumed_content < conn->content_len) {
+ to_read = sizeof(buf);
+ if ((int64_t) to_read > conn->content_len - conn->consumed_content) {
+ to_read = (int) (conn->content_len - conn->consumed_content);
+ }
+ nread = pull(NULL, conn, buf, to_read);
+ if (nread <= 0 || push(fp, sock, ssl, buf, nread) != nread) {
+ break;
+ }
+ conn->consumed_content += nread;
+ }
+
+ if (conn->consumed_content == conn->content_len) {
+ success = nread >= 0;
+ }
+
+ // Each error code path in this function must send an error
+ if (!success) {
+ send_http_error(conn, 577, http_500_error, "%s", "");
+ }
+ }
+
+ return success;
+}
+
+#if !defined(NO_CGI)
+// This structure helps to create an environment for the spawned CGI program.
+// Environment is an array of "VARIABLE=VALUE\0" ASCIIZ strings,
+// last element must be NULL.
+// However, on Windows there is a requirement that all these VARIABLE=VALUE\0
+// strings must reside in a contiguous buffer. The end of the buffer is
+// marked by two '\0' characters.
+// We satisfy both worlds: we create an envp array (which is vars), all
+// entries are actually pointers inside buf.
+struct cgi_env_block {
+ struct mg_connection *conn;
+ char buf[CGI_ENVIRONMENT_SIZE]; // Environment buffer
+ int len; // Space taken
+ char *vars[MAX_CGI_ENVIR_VARS]; // char **envp
+ int nvars; // Number of variables
+};
+
+static char *addenv(struct cgi_env_block *block,
+ PRINTF_FORMAT_STRING(const char *fmt), ...)
+ PRINTF_ARGS(2, 3);
+
+// Append VARIABLE=VALUE\0 string to the buffer, and add a respective
+// pointer into the vars array.
+static char *addenv(struct cgi_env_block *block, const char *fmt, ...) {
+ int n, space;
+ char *added;
+ va_list ap;
+
+ // Calculate how much space is left in the buffer
+ space = sizeof(block->buf) - block->len - 2;
+ assert(space >= 0);
+
+ // Make a pointer to the free space int the buffer
+ added = block->buf + block->len;
+
+ // Copy VARIABLE=VALUE\0 string into the free space
+ va_start(ap, fmt);
+ n = mg_vsnprintf(block->conn, added, (size_t) space, fmt, ap);
+ va_end(ap);
+
+ // Make sure we do not overflow buffer and the envp array
+ if (n > 0 && n + 1 < space &&
+ block->nvars < (int) ARRAY_SIZE(block->vars) - 2) {
+ // Append a pointer to the added string into the envp array
+ block->vars[block->nvars++] = added;
+ // Bump up used length counter. Include \0 terminator
+ block->len += n + 1;
+ } else {
+ cry(block->conn, "%s: CGI env buffer truncated for [%s]", __func__, fmt);
+ }
+
+ return added;
+}
+
+static void prepare_cgi_environment(struct mg_connection *conn,
+ const char *prog,
+ struct cgi_env_block *blk) {
+ const char *s, *slash;
+ struct vec var_vec;
+ char *p, src_addr[20];
+ int i;
+
+ blk->len = blk->nvars = 0;
+ blk->conn = conn;
+ sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa);
+
+ addenv(blk, "SERVER_NAME=%s", conn->ctx->config[AUTHENTICATION_DOMAIN]);
+ addenv(blk, "SERVER_ROOT=%s", conn->ctx->config[DOCUMENT_ROOT]);
+ addenv(blk, "DOCUMENT_ROOT=%s", conn->ctx->config[DOCUMENT_ROOT]);
+
+ // Prepare the environment block
+ addenv(blk, "%s", "GATEWAY_INTERFACE=CGI/1.1");
+ addenv(blk, "%s", "SERVER_PROTOCOL=HTTP/1.1");
+ addenv(blk, "%s", "REDIRECT_STATUS=200"); // For PHP
+
+ // TODO(lsm): fix this for IPv6 case
+ addenv(blk, "SERVER_PORT=%d", ntohs(conn->client.lsa.sin.sin_port));
+
+ addenv(blk, "REQUEST_METHOD=%s", conn->request_info.request_method);
+ addenv(blk, "REMOTE_ADDR=%s", src_addr);
+ addenv(blk, "REMOTE_PORT=%d", conn->request_info.remote_port);
+ addenv(blk, "REQUEST_URI=%s", conn->request_info.uri);
+
+ // SCRIPT_NAME
+ assert(conn->request_info.uri[0] == '/');
+ slash = strrchr(conn->request_info.uri, '/');
+ if ((s = strrchr(prog, '/')) == NULL)
+ s = prog;
+ addenv(blk, "SCRIPT_NAME=%.*s%s", (int) (slash - conn->request_info.uri),
+ conn->request_info.uri, s);
+
+ addenv(blk, "SCRIPT_FILENAME=%s", prog);
+ addenv(blk, "PATH_TRANSLATED=%s", prog);
+ addenv(blk, "HTTPS=%s", conn->ssl == NULL ? "off" : "on");
+
+ if ((s = mg_get_header(conn, "Content-Type")) != NULL)
+ addenv(blk, "CONTENT_TYPE=%s", s);
+
+ if (conn->request_info.query_string != NULL)
+ addenv(blk, "QUERY_STRING=%s", conn->request_info.query_string);
+
+ if ((s = mg_get_header(conn, "Content-Length")) != NULL)
+ addenv(blk, "CONTENT_LENGTH=%s", s);
+
+ if ((s = getenv("PATH")) != NULL)
+ addenv(blk, "PATH=%s", s);
+
+ if (conn->path_info != NULL) {
+ addenv(blk, "PATH_INFO=%s", conn->path_info);
+ }
+
+#if defined(_WIN32)
+ if ((s = getenv("COMSPEC")) != NULL) {
+ addenv(blk, "COMSPEC=%s", s);
+ }
+ if ((s = getenv("SYSTEMROOT")) != NULL) {
+ addenv(blk, "SYSTEMROOT=%s", s);
+ }
+ if ((s = getenv("SystemDrive")) != NULL) {
+ addenv(blk, "SystemDrive=%s", s);
+ }
+#else
+ if ((s = getenv("LD_LIBRARY_PATH")) != NULL)
+ addenv(blk, "LD_LIBRARY_PATH=%s", s);
+#endif // _WIN32
+
+ if ((s = getenv("PERLLIB")) != NULL)
+ addenv(blk, "PERLLIB=%s", s);
+
+ if (conn->request_info.remote_user != NULL) {
+ addenv(blk, "REMOTE_USER=%s", conn->request_info.remote_user);
+ addenv(blk, "%s", "AUTH_TYPE=Digest");
+ }
+
+ // Add all headers as HTTP_* variables
+ for (i = 0; i < conn->request_info.num_headers; i++) {
+ p = addenv(blk, "HTTP_%s=%s",
+ conn->request_info.http_headers[i].name,
+ conn->request_info.http_headers[i].value);
+
+ // Convert variable name into uppercase, and change - to _
+ for (; *p != '=' && *p != '\0'; p++) {
+ if (*p == '-')
+ *p = '_';
+ *p = (char) toupper(* (unsigned char *) p);
+ }
+ }
+
+ // Add user-specified variables
+ s = conn->ctx->config[CGI_ENVIRONMENT];
+ while ((s = next_option(s, &var_vec, NULL)) != NULL) {
+ addenv(blk, "%.*s", (int) var_vec.len, var_vec.ptr);
+ }
+
+ blk->vars[blk->nvars++] = NULL;
+ blk->buf[blk->len++] = '\0';
+
+ assert(blk->nvars < (int) ARRAY_SIZE(blk->vars));
+ assert(blk->len > 0);
+ assert(blk->len < (int) sizeof(blk->buf));
+}
+
+static void handle_cgi_request(struct mg_connection *conn, const char *prog) {
+ int headers_len, data_len, i, fd_stdin[2], fd_stdout[2];
+ const char *status, *status_text;
+ char buf[16384], *pbuf, dir[PATH_MAX], *p;
+ struct mg_request_info ri;
+ struct cgi_env_block blk;
+ FILE *in, *out;
+ pid_t pid;
+
+ prepare_cgi_environment(conn, prog, &blk);
+
+ // CGI must be executed in its own directory. 'dir' must point to the
+ // directory containing executable program, 'p' must point to the
+ // executable program name relative to 'dir'.
+ (void) mg_snprintf(conn, dir, sizeof(dir), "%s", prog);
+ if ((p = strrchr(dir, '/')) != NULL) {
+ *p++ = '\0';
+ } else {
+ dir[0] = '.', dir[1] = '\0';
+ p = (char *) prog;
+ }
+
+ pid = (pid_t) -1;
+ fd_stdin[0] = fd_stdin[1] = fd_stdout[0] = fd_stdout[1] = -1;
+ in = out = NULL;
+
+ if (pipe(fd_stdin) != 0 || pipe(fd_stdout) != 0) {
+ send_http_error(conn, 500, http_500_error,
+ "Cannot create CGI pipe: %s", strerror(ERRNO));
+ goto done;
+ } else if ((pid = spawn_process(conn, p, blk.buf, blk.vars,
+ fd_stdin[0], fd_stdout[1], dir)) == (pid_t) -1) {
+ send_http_error(conn, 500, http_500_error,
+ "Cannot spawn CGI process [%s]: %s", prog, strerror(ERRNO));
+ goto done;
+ }
+
+ // spawn_process() must close those!
+ // If we don't mark them as closed, close() attempt before
+ // return from this function throws an exception on Windows.
+ // Windows does not like when closed descriptor is closed again.
+ fd_stdin[0] = fd_stdout[1] = -1;
+
+ if ((in = fdopen(fd_stdin[1], "wb")) == NULL ||
+ (out = fdopen(fd_stdout[0], "rb")) == NULL) {
+ send_http_error(conn, 500, http_500_error,
+ "fopen: %s", strerror(ERRNO));
+ goto done;
+ }
+
+ setbuf(in, NULL);
+ setbuf(out, NULL);
+
+ // Send POST data to the CGI process if needed
+ if (!strcmp(conn->request_info.request_method, "POST") &&
+ !forward_body_data(conn, in, INVALID_SOCKET, NULL)) {
+ goto done;
+ }
+
+ // Close so child gets an EOF.
+ fclose(in);
+ in = NULL;
+ fd_stdin[1] = -1;
+
+ // Now read CGI reply into a buffer. We need to set correct
+ // status code, thus we need to see all HTTP headers first.
+ // Do not send anything back to client, until we buffer in all
+ // HTTP headers.
+ data_len = 0;
+ headers_len = read_request(out, conn, buf, sizeof(buf), &data_len);
+ if (headers_len <= 0) {
+ send_http_error(conn, 500, http_500_error,
+ "CGI program sent malformed or too big (>%u bytes) "
+ "HTTP headers: [%.*s]",
+ (unsigned) sizeof(buf), data_len, buf);
+ goto done;
+ }
+ pbuf = buf;
+ buf[headers_len - 1] = '\0';
+ parse_http_headers(&pbuf, &ri);
+
+ // Make up and send the status line
+ status_text = "OK";
+ if ((status = get_header(&ri, "Status")) != NULL) {
+ conn->status_code = atoi(status);
+ status_text = status;
+ while (isdigit(* (unsigned char *) status_text) || *status_text == ' ') {
+ status_text++;
+ }
+ } else if (get_header(&ri, "Location") != NULL) {
+ conn->status_code = 302;
+ } else {
+ conn->status_code = 200;
+ }
+ if (get_header(&ri, "Connection") != NULL &&
+ !mg_strcasecmp(get_header(&ri, "Connection"), "keep-alive")) {
+ conn->must_close = 1;
+ }
+ (void) mg_printf(conn, "HTTP/1.1 %d %s\r\n", conn->status_code,
+ status_text);
+
+ // Send headers
+ for (i = 0; i < ri.num_headers; i++) {
+ mg_printf(conn, "%s: %s\r\n",
+ ri.http_headers[i].name, ri.http_headers[i].value);
+ }
+ (void) mg_write(conn, "\r\n", 2);
+
+ // Send chunk of data that may have been read after the headers
+ conn->num_bytes_sent += mg_write(conn, buf + headers_len,
+ (size_t)(data_len - headers_len));
+
+ // Read the rest of CGI output and send to the client
+ send_file_data(conn, out, INT64_MAX);
+
+done:
+ if (pid != (pid_t) -1) {
+ kill(pid, SIGKILL);
+ }
+ if (fd_stdin[0] != -1) {
+ (void) close(fd_stdin[0]);
+ }
+ if (fd_stdout[1] != -1) {
+ (void) close(fd_stdout[1]);
+ }
+
+ if (in != NULL) {
+ (void) fclose(in);
+ } else if (fd_stdin[1] != -1) {
+ (void) close(fd_stdin[1]);
+ }
+
+ if (out != NULL) {
+ (void) fclose(out);
+ } else if (fd_stdout[0] != -1) {
+ (void) close(fd_stdout[0]);
+ }
+}
+#endif // !NO_CGI
+
+// For a given PUT path, create all intermediate subdirectories
+// for given path. Return 0 if the path itself is a directory,
+// or -1 on error, 1 if OK.
+static int put_dir(const char *path) {
+ char buf[PATH_MAX];
+ const char *s, *p;
+ struct mgstat st;
+ int len, res = 1;
+
+ for (s = p = path + 2; (p = strchr(s, '/')) != NULL; s = ++p) {
+ len = p - path;
+ if (len >= (int) sizeof(buf)) {
+ res = -1;
+ break;
+ }
+ memcpy(buf, path, len);
+ buf[len] = '\0';
+
+ // Try to create intermediate directory
+ DEBUG_TRACE(("mkdir(%s)", buf));
+ if (mg_stat(buf, &st) == -1 && mg_mkdir(buf, 0755) != 0) {
+ res = -1;
+ break;
+ }
+
+ // Is path itself a directory?
+ if (p[1] == '\0') {
+ res = 0;
+ }
+ }
+
+ return res;
+}
+
+static void put_file(struct mg_connection *conn, const char *path) {
+ struct mgstat st;
+ const char *range;
+ int64_t r1, r2;
+ FILE *fp;
+ int rc;
+
+ conn->status_code = mg_stat(path, &st) == 0 ? 200 : 201;
+
+ if ((rc = put_dir(path)) == 0) {
+ mg_printf(conn, "HTTP/1.1 %d OK\r\n\r\n", conn->status_code);
+ } else if (rc == -1) {
+ send_http_error(conn, 500, http_500_error,
+ "put_dir(%s): %s", path, strerror(ERRNO));
+ } else if ((fp = mg_fopen(path, "wb+")) == NULL) {
+ send_http_error(conn, 500, http_500_error,
+ "fopen(%s): %s", path, strerror(ERRNO));
+ } else {
+ set_close_on_exec(fileno(fp));
+ range = mg_get_header(conn, "Content-Range");
+ r1 = r2 = 0;
+ if (range != NULL && parse_range_header(range, &r1, &r2) > 0) {
+ conn->status_code = 206;
+ // TODO(lsm): handle seek error
+ (void) fseeko(fp, r1, SEEK_SET);
+ }
+ if (forward_body_data(conn, fp, INVALID_SOCKET, NULL)) {
+ (void) mg_printf(conn, "HTTP/1.1 %d OK\r\n\r\n", conn->status_code);
+ }
+ (void) fclose(fp);
+ }
+}
+
+static void send_ssi_file(struct mg_connection *, const char *, FILE *, int);
+
+static void do_ssi_include(struct mg_connection *conn, const char *ssi,
+ char *tag, int include_level) {
+ char file_name[MG_BUF_LEN], path[PATH_MAX], *p;
+ FILE *fp;
+
+ // sscanf() is safe here, since send_ssi_file() also uses buffer
+ // of size MG_BUF_LEN to get the tag. So strlen(tag) is always < MG_BUF_LEN.
+ if (sscanf(tag, " virtual=\"%[^\"]\"", file_name) == 1) {
+ // File name is relative to the webserver root
+ (void) mg_snprintf(conn, path, sizeof(path), "%s%c%s",
+ conn->ctx->config[DOCUMENT_ROOT], '/', file_name);
+ } else if (sscanf(tag, " file=\"%[^\"]\"", file_name) == 1) {
+ // File name is relative to the webserver working directory
+ // or it is absolute system path
+ (void) mg_snprintf(conn, path, sizeof(path), "%s", file_name);
+ } else if (sscanf(tag, " \"%[^\"]\"", file_name) == 1) {
+ // File name is relative to the currect document
+ (void) mg_snprintf(conn, path, sizeof(path), "%s", ssi);
+ if ((p = strrchr(path, '/')) != NULL) {
+ p[1] = '\0';
+ }
+ (void) mg_snprintf(conn, path + strlen(path),
+ sizeof(path) - strlen(path), "%s", file_name);
+ } else {
+ cry(conn, "Bad SSI #include: [%s]", tag);
+ return;
+ }
+
+ if ((fp = mg_fopen(path, "rb")) == NULL) {
+ cry(conn, "Cannot open SSI #include: [%s]: fopen(%s): %s",
+ tag, path, strerror(ERRNO));
+ } else {
+ set_close_on_exec(fileno(fp));
+ if (match_prefix(conn->ctx->config[SSI_EXTENSIONS],
+ strlen(conn->ctx->config[SSI_EXTENSIONS]), path) > 0) {
+ send_ssi_file(conn, path, fp, include_level + 1);
+ } else {
+ send_file_data(conn, fp, INT64_MAX);
+ }
+ (void) fclose(fp);
+ }
+}
+
+#if !defined(NO_POPEN)
+static void do_ssi_exec(struct mg_connection *conn, char *tag) {
+ char cmd[MG_BUF_LEN];
+ FILE *fp;
+
+ if (sscanf(tag, " \"%[^\"]\"", cmd) != 1) {
+ cry(conn, "Bad SSI #exec: [%s]", tag);
+ } else if ((fp = popen(cmd, "r")) == NULL) {
+ cry(conn, "Cannot SSI #exec: [%s]: %s", cmd, strerror(ERRNO));
+ } else {
+ send_file_data(conn, fp, INT64_MAX);
+ (void) pclose(fp);
+ }
+}
+#endif // !NO_POPEN
+
+static void send_ssi_file(struct mg_connection *conn, const char *path,
+ FILE *fp, int include_level) {
+ char buf[MG_BUF_LEN];
+ int ch, len, in_ssi_tag;
+
+ if (include_level > 10) {
+ cry(conn, "SSI #include level is too deep (%s)", path);
+ return;
+ }
+
+ in_ssi_tag = 0;
+ len = 0;
+
+ while ((ch = fgetc(fp)) != EOF) {
+ if (in_ssi_tag && ch == '>') {
+ in_ssi_tag = 0;
+ buf[len++] = (char) ch;
+ buf[len] = '\0';
+ assert(len <= (int) sizeof(buf));
+ if (len < 6 || memcmp(buf, "<!--#", 5) != 0) {
+ // Not an SSI tag, pass it
+ (void) mg_write(conn, buf, (size_t)len);
+ } else {
+ if (!memcmp(buf + 5, "include", 7)) {
+ do_ssi_include(conn, path, buf + 12, include_level);
+#if !defined(NO_POPEN)
+ } else if (!memcmp(buf + 5, "exec", 4)) {
+ do_ssi_exec(conn, buf + 9);
+#endif // !NO_POPEN
+ } else {
+ cry(conn, "%s: unknown SSI " "command: \"%s\"", path, buf);
+ }
+ }
+ len = 0;
+ } else if (in_ssi_tag) {
+ if (len == 5 && memcmp(buf, "<!--#", 5) != 0) {
+ // Not an SSI tag
+ in_ssi_tag = 0;
+ } else if (len == (int) sizeof(buf) - 2) {
+ cry(conn, "%s: SSI tag is too large", path);
+ len = 0;
+ }
+ buf[len++] = ch & 0xff;
+ } else if (ch == '<') {
+ in_ssi_tag = 1;
+ if (len > 0) {
+ (void) mg_write(conn, buf, (size_t)len);
+ }
+ len = 0;
+ buf[len++] = ch & 0xff;
+ } else {
+ buf[len++] = ch & 0xff;
+ if (len == (int) sizeof(buf)) {
+ (void) mg_write(conn, buf, (size_t)len);
+ len = 0;
+ }
+ }
+ }
+
+ // Send the rest of buffered data
+ if (len > 0) {
+ (void) mg_write(conn, buf, (size_t)len);
+ }
+}
+
+static void handle_ssi_file_request(struct mg_connection *conn,
+ const char *path) {
+ FILE *fp;
+
+ if ((fp = mg_fopen(path, "rb")) == NULL) {
+ send_http_error(conn, 500, http_500_error, "fopen(%s): %s", path,
+ strerror(ERRNO));
+ } else {
+ conn->must_close = 1;
+ set_close_on_exec(fileno(fp));
+ mg_printf(conn, "HTTP/1.1 200 OK\r\n"
+ "Content-Type: text/html\r\nConnection: %s\r\n\r\n",
+ suggest_connection_header(conn));
+ send_ssi_file(conn, path, fp, 0);
+ (void) fclose(fp);
+ }
+}
+
+static void send_options(struct mg_connection *conn) {
+ conn->status_code = 200;
+
+ (void) mg_printf(conn,
+ "HTTP/1.1 200 OK\r\n"
+ "Allow: GET, POST, HEAD, CONNECT, PUT, DELETE, OPTIONS\r\n"
+ "DAV: 1\r\n\r\n");
+}
+
+// Writes PROPFIND properties for a collection element
+static void print_props(struct mg_connection *conn, const char* uri,
+ struct mgstat* st) {
+ char mtime[64];
+ gmt_time_string(mtime, sizeof(mtime), &st->mtime);
+ conn->num_bytes_sent += mg_printf(conn,
+ "<d:response>"
+ "<d:href>%s</d:href>"
+ "<d:propstat>"
+ "<d:prop>"
+ "<d:resourcetype>%s</d:resourcetype>"
+ "<d:getcontentlength>%" INT64_FMT "</d:getcontentlength>"
+ "<d:getlastmodified>%s</d:getlastmodified>"
+ "</d:prop>"
+ "<d:status>HTTP/1.1 200 OK</d:status>"
+ "</d:propstat>"
+ "</d:response>\n",
+ uri,
+ st->is_directory ? "<d:collection/>" : "",
+ st->size,
+ mtime);
+}
+
+static void print_dav_dir_entry(struct de *de, void *data) {
+ char href[PATH_MAX];
+ struct mg_connection *conn = (struct mg_connection *) data;
+ mg_snprintf(conn, href, sizeof(href), "%s%s",
+ conn->request_info.uri, de->file_name);
+ print_props(conn, href, &de->st);
+}
+
+static void handle_propfind(struct mg_connection *conn, const char* path,
+ struct mgstat* st) {
+ const char *depth = mg_get_header(conn, "Depth");
+
+ conn->must_close = 1;
+ conn->status_code = 207;
+ mg_printf(conn, "HTTP/1.1 207 Multi-Status\r\n"
+ "Connection: close\r\n"
+ "Content-Type: text/xml; charset=utf-8\r\n\r\n");
+
+ conn->num_bytes_sent += mg_printf(conn,
+ "<?xml version=\"1.0\" encoding=\"utf-8\"?>"
+ "<d:multistatus xmlns:d='DAV:'>\n");
+
+ // Print properties for the requested resource itself
+ print_props(conn, conn->request_info.uri, st);
+
+ // If it is a directory, print directory entries too if Depth is not 0
+ if (st->is_directory &&
+ !mg_strcasecmp(conn->ctx->config[ENABLE_DIRECTORY_LISTING], "yes") &&
+ (depth == NULL || strcmp(depth, "0") != 0)) {
+ scan_directory(conn, path, conn, &print_dav_dir_entry);
+ }
+
+ conn->num_bytes_sent += mg_printf(conn, "%s\n", "</d:multistatus>");
+}
+
+#if defined(USE_WEBSOCKET)
+
+// START OF SHA-1 code
+// Copyright(c) By Steve Reid <steve@edmweb.com>
+#define SHA1HANDSOFF
+#if defined(__sun)
+#include "solarisfixes.h"
+#endif
+#define rol(value, bits) (((value) << (bits)) | ((value) >> (32 - (bits))))
+#if BYTE_ORDER == LITTLE_ENDIAN
+#define blk0(i) (block->l[i] = (rol(block->l[i],24)&0xFF00FF00) \
+ |(rol(block->l[i],8)&0x00FF00FF))
+#elif BYTE_ORDER == BIG_ENDIAN
+#define blk0(i) block->l[i]
+#else
+#error "Endianness not defined!"
+#endif
+#define blk(i) (block->l[i&15] = rol(block->l[(i+13)&15]^block->l[(i+8)&15] \
+ ^block->l[(i+2)&15]^block->l[i&15],1))
+#define R0(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk0(i)+0x5A827999+rol(v,5);w=rol(w,30);
+#define R1(v,w,x,y,z,i) z+=((w&(x^y))^y)+blk(i)+0x5A827999+rol(v,5);w=rol(w,30);
+#define R2(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0x6ED9EBA1+rol(v,5);w=rol(w,30);
+#define R3(v,w,x,y,z,i) z+=(((w|x)&y)|(w&x))+blk(i)+0x8F1BBCDC+rol(v,5);w=rol(w,30);
+#define R4(v,w,x,y,z,i) z+=(w^x^y)+blk(i)+0xCA62C1D6+rol(v,5);w=rol(w,30);
+
+typedef struct {
+ uint32_t state[5];
+ uint32_t count[2];
+ unsigned char buffer[64];
+} SHA1_CTX;
+
+static void SHA1Transform(uint32_t state[5], const unsigned char buffer[64]) {
+ uint32_t a, b, c, d, e;
+ typedef union { unsigned char c[64]; uint32_t l[16]; } CHAR64LONG16;
+
+ CHAR64LONG16 block[1];
+ memcpy(block, buffer, 64);
+ a = state[0];
+ b = state[1];
+ c = state[2];
+ d = state[3];
+ e = state[4];
+ R0(a,b,c,d,e, 0); R0(e,a,b,c,d, 1); R0(d,e,a,b,c, 2); R0(c,d,e,a,b, 3);
+ R0(b,c,d,e,a, 4); R0(a,b,c,d,e, 5); R0(e,a,b,c,d, 6); R0(d,e,a,b,c, 7);
+ R0(c,d,e,a,b, 8); R0(b,c,d,e,a, 9); R0(a,b,c,d,e,10); R0(e,a,b,c,d,11);
+ R0(d,e,a,b,c,12); R0(c,d,e,a,b,13); R0(b,c,d,e,a,14); R0(a,b,c,d,e,15);
+ R1(e,a,b,c,d,16); R1(d,e,a,b,c,17); R1(c,d,e,a,b,18); R1(b,c,d,e,a,19);
+ R2(a,b,c,d,e,20); R2(e,a,b,c,d,21); R2(d,e,a,b,c,22); R2(c,d,e,a,b,23);
+ R2(b,c,d,e,a,24); R2(a,b,c,d,e,25); R2(e,a,b,c,d,26); R2(d,e,a,b,c,27);
+ R2(c,d,e,a,b,28); R2(b,c,d,e,a,29); R2(a,b,c,d,e,30); R2(e,a,b,c,d,31);
+ R2(d,e,a,b,c,32); R2(c,d,e,a,b,33); R2(b,c,d,e,a,34); R2(a,b,c,d,e,35);
+ R2(e,a,b,c,d,36); R2(d,e,a,b,c,37); R2(c,d,e,a,b,38); R2(b,c,d,e,a,39);
+ R3(a,b,c,d,e,40); R3(e,a,b,c,d,41); R3(d,e,a,b,c,42); R3(c,d,e,a,b,43);
+ R3(b,c,d,e,a,44); R3(a,b,c,d,e,45); R3(e,a,b,c,d,46); R3(d,e,a,b,c,47);
+ R3(c,d,e,a,b,48); R3(b,c,d,e,a,49); R3(a,b,c,d,e,50); R3(e,a,b,c,d,51);
+ R3(d,e,a,b,c,52); R3(c,d,e,a,b,53); R3(b,c,d,e,a,54); R3(a,b,c,d,e,55);
+ R3(e,a,b,c,d,56); R3(d,e,a,b,c,57); R3(c,d,e,a,b,58); R3(b,c,d,e,a,59);
+ R4(a,b,c,d,e,60); R4(e,a,b,c,d,61); R4(d,e,a,b,c,62); R4(c,d,e,a,b,63);
+ R4(b,c,d,e,a,64); R4(a,b,c,d,e,65); R4(e,a,b,c,d,66); R4(d,e,a,b,c,67);
+ R4(c,d,e,a,b,68); R4(b,c,d,e,a,69); R4(a,b,c,d,e,70); R4(e,a,b,c,d,71);
+ R4(d,e,a,b,c,72); R4(c,d,e,a,b,73); R4(b,c,d,e,a,74); R4(a,b,c,d,e,75);
+ R4(e,a,b,c,d,76); R4(d,e,a,b,c,77); R4(c,d,e,a,b,78); R4(b,c,d,e,a,79);
+ state[0] += a;
+ state[1] += b;
+ state[2] += c;
+ state[3] += d;
+ state[4] += e;
+ a = b = c = d = e = 0;
+ memset(block, '\0', sizeof(block));
+}
+
+static void SHA1Init(SHA1_CTX* context) {
+ context->state[0] = 0x67452301;
+ context->state[1] = 0xEFCDAB89;
+ context->state[2] = 0x98BADCFE;
+ context->state[3] = 0x10325476;
+ context->state[4] = 0xC3D2E1F0;
+ context->count[0] = context->count[1] = 0;
+}
+
+static void SHA1Update(SHA1_CTX* context, const unsigned char* data,
+ uint32_t len) {
+ uint32_t i, j;
+
+ j = context->count[0];
+ if ((context->count[0] += len << 3) < j)
+ context->count[1]++;
+ context->count[1] += (len>>29);
+ j = (j >> 3) & 63;
+ if ((j + len) > 63) {
+ memcpy(&context->buffer[j], data, (i = 64-j));
+ SHA1Transform(context->state, context->buffer);
+ for ( ; i + 63 < len; i += 64) {
+ SHA1Transform(context->state, &data[i]);
+ }
+ j = 0;
+ }
+ else i = 0;
+ memcpy(&context->buffer[j], &data[i], len - i);
+}
+
+static void SHA1Final(unsigned char digest[20], SHA1_CTX* context) {
+ unsigned i;
+ unsigned char finalcount[8], c;
+
+ for (i = 0; i < 8; i++) {
+ finalcount[i] = (unsigned char)((context->count[(i >= 4 ? 0 : 1)]
+ >> ((3-(i & 3)) * 8) ) & 255);
+ }
+ c = 0200;
+ SHA1Update(context, &c, 1);
+ while ((context->count[0] & 504) != 448) {
+ c = 0000;
+ SHA1Update(context, &c, 1);
+ }
+ SHA1Update(context, finalcount, 8);
+ for (i = 0; i < 20; i++) {
+ digest[i] = (unsigned char)
+ ((context->state[i>>2] >> ((3-(i & 3)) * 8) ) & 255);
+ }
+ memset(context, '\0', sizeof(*context));
+ memset(&finalcount, '\0', sizeof(finalcount));
+}
+// END OF SHA1 CODE
+
+static void base64_encode(const unsigned char *src, int src_len, char *dst) {
+ static const char *b64 =
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+ int i, j, a, b, c;
+
+ for (i = j = 0; i < src_len; i += 3) {
+ a = src[i];
+ b = i + 1 >= src_len ? 0 : src[i + 1];
+ c = i + 2 >= src_len ? 0 : src[i + 2];
+
+ dst[j++] = b64[a >> 2];
+ dst[j++] = b64[((a & 3) << 4) | (b >> 4)];
+ if (i + 1 < src_len) {
+ dst[j++] = b64[(b & 15) << 2 | (c >> 6)];
+ }
+ if (i + 2 < src_len) {
+ dst[j++] = b64[c & 63];
+ }
+ }
+ while (j % 4 != 0) {
+ dst[j++] = '=';
+ }
+ dst[j++] = '\0';
+}
+
+static void send_websocket_handshake(struct mg_connection *conn) {
+ static const char *magic = "258EAFA5-E914-47DA-95CA-C5AB0DC85B11";
+ char buf[100], sha[20], b64_sha[sizeof(sha) * 2];
+ SHA1_CTX sha_ctx;
+
+ mg_snprintf(conn, buf, sizeof(buf), "%s%s",
+ mg_get_header(conn, "Sec-WebSocket-Key"), magic);
+ SHA1Init(&sha_ctx);
+ SHA1Update(&sha_ctx, (unsigned char *) buf, strlen(buf));
+ SHA1Final((unsigned char *) sha, &sha_ctx);
+ base64_encode((unsigned char *) sha, sizeof(sha), b64_sha);
+ mg_printf(conn, "%s%s%s",
+ "HTTP/1.1 101 Switching Protocols\r\n"
+ "Upgrade: websocket\r\n"
+ "Connection: Upgrade\r\n"
+ "Sec-WebSocket-Accept: ", b64_sha, "\r\n\r\n");
+}
+
+static void read_websocket(struct mg_connection *conn) {
+ unsigned char *mask, *buf = (unsigned char *) conn->buf + conn->request_len;
+ int n, len, mask_len, body_len, discard_len;
+
+ for (;;) {
+ if ((body_len = conn->data_len - conn->request_len) >= 2) {
+ len = buf[1] & 127;
+ mask_len = buf[1] & 128 ? 4 : 0;
+ if (len < 126) {
+ conn->content_len = 2 + mask_len + len;
+ mask = buf + 2;
+ } else if (len == 126 && body_len >= 4) {
+ conn->content_len = 2 + mask_len + ((((int) buf[2]) << 8) + buf[3]);
+ mask = buf + 4;
+ } else if (body_len >= 10) {
+ conn->content_len = 2 + mask_len +
+ ((uint64_t) htonl(* (uint32_t *) &buf[2])) << 32 |
+ htonl(* (uint32_t *) &buf[6]);
+ mask = buf + 10;
+ }
+ }
+
+ if (conn->content_len > 0) {
+ if (call_user(conn, MG_WEBSOCKET_MESSAGE) != NULL) {
+ break; // Callback signalled to exit
+ }
+ discard_len = conn->content_len > body_len ? body_len : conn->content_len;
+ memmove(buf, buf + discard_len, conn->data_len - discard_len);
+ conn->data_len -= discard_len;
+ conn->content_len = conn->consumed_content = 0;
+ } else {
+ if (wait_until_socket_is_readable(conn) == 0) {
+ break;
+ }
+ n = pull(NULL, conn, conn->buf + conn->data_len,
+ conn->buf_size - conn->data_len);
+ if (n <= 0) {
+ break;
+ }
+ conn->data_len += n;
+ }
+ }
+}
+
+static void handle_websocket_request(struct mg_connection *conn) {
+ if (strcmp(mg_get_header(conn, "Sec-WebSocket-Version"), "13") != 0) {
+ send_http_error(conn, 426, "Upgrade Required", "%s", "Upgrade Required");
+ } else if (call_user(conn, MG_WEBSOCKET_CONNECT) != NULL) {
+ // Callback has returned non-NULL, do not proceed with handshake
+ } else {
+ send_websocket_handshake(conn);
+ call_user(conn, MG_WEBSOCKET_READY);
+ read_websocket(conn);
+ call_user(conn, MG_WEBSOCKET_CLOSE);
+ }
+}
+
+static int is_websocket_request(const struct mg_connection *conn) {
+ const char *host, *upgrade, *connection, *version, *key;
+
+ host = mg_get_header(conn, "Host");
+ upgrade = mg_get_header(conn, "Upgrade");
+ connection = mg_get_header(conn, "Connection");
+ key = mg_get_header(conn, "Sec-WebSocket-Key");
+ version = mg_get_header(conn, "Sec-WebSocket-Version");
+
+ return host != NULL && upgrade != NULL && connection != NULL &&
+ key != NULL && version != NULL &&
+ !mg_strcasecmp(upgrade, "websocket") &&
+ !mg_strcasecmp(connection, "Upgrade");
+}
+#endif // !USE_WEBSOCKET
+
+static int isbyte(int n) {
+ return n >= 0 && n <= 255;
+}
+
+static int parse_net(const char *spec, uint32_t *net, uint32_t *mask) {
+ int n, a, b, c, d, slash = 32, len = 0;
+
+ if ((sscanf(spec, "%d.%d.%d.%d/%d%n", &a, &b, &c, &d, &slash, &n) == 5 ||
+ sscanf(spec, "%d.%d.%d.%d%n", &a, &b, &c, &d, &n) == 4) &&
+ isbyte(a) && isbyte(b) && isbyte(c) && isbyte(d) &&
+ slash >= 0 && slash < 33) {
+ len = n;
+ *net = ((uint32_t)a << 24) | ((uint32_t)b << 16) | ((uint32_t)c << 8) | d;
+ *mask = slash ? 0xffffffffU << (32 - slash) : 0;
+ }
+
+ return len;
+}
+
+static int set_throttle(const char *spec, uint32_t remote_ip, const char *uri) {
+ int throttle = 0;
+ struct vec vec, val;
+ uint32_t net, mask;
+ char mult;
+ double v;
+
+ while ((spec = next_option(spec, &vec, &val)) != NULL) {
+ mult = ',';
+ if (sscanf(val.ptr, "%lf%c", &v, &mult) < 1 || v < 0 ||
+ (lowercase(&mult) != 'k' && lowercase(&mult) != 'm' && mult != ',')) {
+ continue;
+ }
+ v *= lowercase(&mult) == 'k' ? 1024 : lowercase(&mult) == 'm' ? 1048576 : 1;
+ if (vec.len == 1 && vec.ptr[0] == '*') {
+ throttle = (int) v;
+ } else if (parse_net(vec.ptr, &net, &mask) > 0) {
+ if ((remote_ip & mask) == net) {
+ throttle = (int) v;
+ }
+ } else if (match_prefix(vec.ptr, vec.len, uri) > 0) {
+ throttle = (int) v;
+ }
+ }
+
+ return throttle;
+}
+
+static uint32_t get_remote_ip(const struct mg_connection *conn) {
+ return ntohl(* (uint32_t *) &conn->client.rsa.sin.sin_addr);
+}
+
+// This is the heart of the Mongoose's logic.
+// This function is called when the request is read, parsed and validated,
+// and Mongoose must decide what action to take: serve a file, or
+// a directory, or call embedded function, etcetera.
+static void handle_request(struct mg_connection *conn) {
+ struct mg_request_info *ri = &conn->request_info;
+ char path[PATH_MAX];
+ int stat_result, uri_len;
+ struct mgstat st;
+
+ if ((conn->request_info.query_string = strchr(ri->uri, '?')) != NULL) {
+ *conn->request_info.query_string++ = '\0';
+ }
+ uri_len = (int) strlen(ri->uri);
+ url_decode(ri->uri, (size_t)uri_len, ri->uri, (size_t)(uri_len + 1), 0);
+ remove_double_dots_and_double_slashes(ri->uri);
+ stat_result = convert_uri_to_file_name(conn, path, sizeof(path), &st);
+ conn->throttle = set_throttle(conn->ctx->config[THROTTLE],
+ get_remote_ip(conn), ri->uri);
+
+ DEBUG_TRACE(("%s", ri->uri));
+ if (!check_authorization(conn, path)) {
+ send_authorization_request(conn);
+#if defined(USE_WEBSOCKET)
+ } else if (is_websocket_request(conn)) {
+ handle_websocket_request(conn);
+#endif
+ } else if (call_user(conn, MG_NEW_REQUEST) != NULL) {
+ // Do nothing, callback has served the request
+ } else if (!strcmp(ri->request_method, "OPTIONS")) {
+ send_options(conn);
+ } else if (conn->ctx->config[DOCUMENT_ROOT] == NULL) {
+ send_http_error(conn, 404, "Not Found", "Not Found");
+ } else if ((!strcmp(ri->request_method, "PUT") ||
+ !strcmp(ri->request_method, "DELETE")) &&
+ (conn->ctx->config[PUT_DELETE_PASSWORDS_FILE] == NULL ||
+ is_authorized_for_put(conn) != 1)) {
+ send_authorization_request(conn);
+ } else if (!strcmp(ri->request_method, "PUT")) {
+ put_file(conn, path);
+ } else if (!strcmp(ri->request_method, "DELETE")) {
+ if (mg_remove(path) == 0) {
+ send_http_error(conn, 200, "OK", "%s", "");
+ } else {
+ send_http_error(conn, 500, http_500_error, "remove(%s): %s", path,
+ strerror(ERRNO));
+ }
+ } else if (stat_result != 0 || must_hide_file(conn, path)) {
+ send_http_error(conn, 404, "Not Found", "%s", "File not found");
+ } else if (st.is_directory && ri->uri[uri_len - 1] != '/') {
+ (void) mg_printf(conn, "HTTP/1.1 301 Moved Permanently\r\n"
+ "Location: %s/\r\n\r\n", ri->uri);
+ } else if (!strcmp(ri->request_method, "PROPFIND")) {
+ handle_propfind(conn, path, &st);
+ } else if (st.is_directory &&
+ !substitute_index_file(conn, path, sizeof(path), &st)) {
+ if (!mg_strcasecmp(conn->ctx->config[ENABLE_DIRECTORY_LISTING], "yes")) {
+ handle_directory_request(conn, path);
+ } else {
+ send_http_error(conn, 403, "Directory Listing Denied",
+ "Directory listing denied");
+ }
+#if !defined(NO_CGI)
+ } else if (match_prefix(conn->ctx->config[CGI_EXTENSIONS],
+ strlen(conn->ctx->config[CGI_EXTENSIONS]),
+ path) > 0) {
+ if (strcmp(ri->request_method, "POST") &&
+ strcmp(ri->request_method, "GET")) {
+ send_http_error(conn, 501, "Not Implemented",
+ "Method %s is not implemented", ri->request_method);
+ } else {
+ handle_cgi_request(conn, path);
+ }
+#endif // !NO_CGI
+ } else if (match_prefix(conn->ctx->config[SSI_EXTENSIONS],
+ strlen(conn->ctx->config[SSI_EXTENSIONS]),
+ path) > 0) {
+ handle_ssi_file_request(conn, path);
+ } else if (is_not_modified(conn, &st)) {
+ send_http_error(conn, 304, "Not Modified", "%s", "");
+ } else {
+ handle_file_request(conn, path, &st);
+ }
+}
+
+static void close_all_listening_sockets(struct mg_context *ctx) {
+ struct socket *sp, *tmp;
+ for (sp = ctx->listening_sockets; sp != NULL; sp = tmp) {
+ tmp = sp->next;
+ (void) closesocket(sp->sock);
+ free(sp);
+ }
+}
+
+// Valid listening port specification is: [ip_address:]port[s]
+// Examples: 80, 443s, 127.0.0.1:3128, 1.2.3.4:8080s
+// TODO(lsm): add parsing of the IPv6 address
+static int parse_port_string(const struct vec *vec, struct socket *so) {
+ int a, b, c, d, port, len;
+
+ // MacOS needs that. If we do not zero it, subsequent bind() will fail.
+ // Also, all-zeroes in the socket address means binding to all addresses
+ // for both IPv4 and IPv6 (INADDR_ANY and IN6ADDR_ANY_INIT).
+ memset(so, 0, sizeof(*so));
+
+ if (sscanf(vec->ptr, "%d.%d.%d.%d:%d%n", &a, &b, &c, &d, &port, &len) == 5) {
+ // Bind to a specific IPv4 address
+ so->lsa.sin.sin_addr.s_addr = htonl((a << 24) | (b << 16) | (c << 8) | d);
+ } else if (sscanf(vec->ptr, "%d%n", &port, &len) != 1 ||
+ len <= 0 ||
+ len > (int) vec->len ||
+ (vec->ptr[len] && vec->ptr[len] != 's' && vec->ptr[len] != ',')) {
+ return 0;
+ }
+
+ so->is_ssl = vec->ptr[len] == 's';
+#if defined(USE_IPV6)
+ so->lsa.sin6.sin6_family = AF_INET6;
+ so->lsa.sin6.sin6_port = htons((uint16_t) port);
+#else
+ so->lsa.sin.sin_family = AF_INET;
+ so->lsa.sin.sin_port = htons((uint16_t) port);
+#endif
+
+ return 1;
+}
+
+static int set_ports_option(struct mg_context *ctx) {
+ const char *list = ctx->config[LISTENING_PORTS];
+ int on = 1, success = 1;
+ SOCKET sock;
+ struct vec vec;
+ struct socket so, *listener;
+
+ while (success && (list = next_option(list, &vec, NULL)) != NULL) {
+ if (!parse_port_string(&vec, &so)) {
+ cry(fc(ctx), "%s: %.*s: invalid port spec. Expecting list of: %s",
+ __func__, (int) vec.len, vec.ptr, "[IP_ADDRESS:]PORT[s|p]");
+ success = 0;
+ } else if (so.is_ssl &&
+ (ctx->ssl_ctx == NULL || ctx->config[SSL_CERTIFICATE] == NULL)) {
+ cry(fc(ctx), "Cannot add SSL socket, is -ssl_certificate option set?");
+ success = 0;
+ } else if ((sock = socket(so.lsa.sa.sa_family, SOCK_STREAM, 6)) ==
+ INVALID_SOCKET ||
+ // On Windows, SO_REUSEADDR is recommended only for
+ // broadcast UDP sockets
+ setsockopt(sock, SOL_SOCKET, SO_REUSEADDR, (const char *) &on,
+ sizeof(on)) != 0 ||
+ // Set TCP keep-alive. This is needed because if HTTP-level
+ // keep-alive is enabled, and client resets the connection,
+ // server won't get TCP FIN or RST and will keep the connection
+ // open forever. With TCP keep-alive, next keep-alive
+ // handshake will figure out that the client is down and
+ // will close the server end.
+ // Thanks to Igor Klopov who suggested the patch.
+ setsockopt(sock, SOL_SOCKET, SO_KEEPALIVE, (char *) &on,
+ sizeof(on)) != 0 ||
+ bind(sock, &so.lsa.sa, sizeof(so.lsa)) != 0 ||
+ listen(sock, SOMAXCONN) != 0) {
+ closesocket(sock);
+ cry(fc(ctx), "%s: cannot bind to %.*s: %s", __func__,
+ (int) vec.len, vec.ptr, strerror(ERRNO));
+ success = 0;
+ } else if ((listener = (struct socket *)
+ calloc(1, sizeof(*listener))) == NULL) {
+ // NOTE(lsm): order is important: call cry before closesocket(),
+ // cause closesocket() alters the errno.
+ cry(fc(ctx), "%s: %s", __func__, strerror(ERRNO));
+ closesocket(sock);
+ success = 0;
+ } else {
+ *listener = so;
+ listener->sock = sock;
+ set_close_on_exec(listener->sock);
+ listener->next = ctx->listening_sockets;
+ ctx->listening_sockets = listener;
+ }
+ }
+
+ if (!success) {
+ close_all_listening_sockets(ctx);
+ }
+
+ return success;
+}
+
+static void log_header(const struct mg_connection *conn, const char *header,
+ FILE *fp) {
+ const char *header_value;
+
+ if ((header_value = mg_get_header(conn, header)) == NULL) {
+ (void) fprintf(fp, "%s", " -");
+ } else {
+ (void) fprintf(fp, " \"%s\"", header_value);
+ }
+}
+
+static void log_access(const struct mg_connection *conn) {
+ const struct mg_request_info *ri;
+ FILE *fp;
+ char date[64], src_addr[20];
+
+ fp = conn->ctx->config[ACCESS_LOG_FILE] == NULL ? NULL :
+ mg_fopen(conn->ctx->config[ACCESS_LOG_FILE], "a+");
+
+ if (fp == NULL)
+ return;
+
+ strftime(date, sizeof(date), "%d/%b/%Y:%H:%M:%S %z",
+ localtime(&conn->birth_time));
+
+ ri = &conn->request_info;
+ flockfile(fp);
+
+ sockaddr_to_string(src_addr, sizeof(src_addr), &conn->client.rsa);
+ fprintf(fp, "%s - %s [%s] \"%s %s HTTP/%s\" %d %" INT64_FMT,
+ src_addr, ri->remote_user == NULL ? "-" : ri->remote_user, date,
+ ri->request_method ? ri->request_method : "-",
+ ri->uri ? ri->uri : "-", ri->http_version,
+ conn->status_code, conn->num_bytes_sent);
+ log_header(conn, "Referer", fp);
+ log_header(conn, "User-Agent", fp);
+ fputc('\n', fp);
+ fflush(fp);
+
+ funlockfile(fp);
+ fclose(fp);
+}
+
+// Verify given socket address against the ACL.
+// Return -1 if ACL is malformed, 0 if address is disallowed, 1 if allowed.
+static int check_acl(struct mg_context *ctx, uint32_t remote_ip) {
+ int allowed, flag;
+ uint32_t net, mask;
+ struct vec vec;
+ const char *list = ctx->config[ACCESS_CONTROL_LIST];
+
+ // If any ACL is set, deny by default
+ allowed = list == NULL ? '+' : '-';
+
+ while ((list = next_option(list, &vec, NULL)) != NULL) {
+ flag = vec.ptr[0];
+ if ((flag != '+' && flag != '-') ||
+ parse_net(&vec.ptr[1], &net, &mask) == 0) {
+ cry(fc(ctx), "%s: subnet must be [+|-]x.x.x.x[/x]", __func__);
+ return -1;
+ }
+
+ if (net == (remote_ip & mask)) {
+ allowed = flag;
+ }
+ }
+
+ return allowed == '+';
+}
+
+static void add_to_set(SOCKET fd, fd_set *set, int *max_fd) {
+ FD_SET(fd, set);
+ if (fd > (SOCKET) *max_fd) {
+ *max_fd = (int) fd;
+ }
+}
+
+#if !defined(_WIN32)
+static int set_uid_option(struct mg_context *ctx) {
+ struct passwd *pw;
+ const char *uid = ctx->config[RUN_AS_USER];
+ int success = 0;
+
+ if (uid == NULL) {
+ success = 1;
+ } else {
+ if ((pw = getpwnam(uid)) == NULL) {
+ cry(fc(ctx), "%s: unknown user [%s]", __func__, uid);
+ } else if (setgid(pw->pw_gid) == -1) {
+ cry(fc(ctx), "%s: setgid(%s): %s", __func__, uid, strerror(errno));
+ } else if (setuid(pw->pw_uid) == -1) {
+ cry(fc(ctx), "%s: setuid(%s): %s", __func__, uid, strerror(errno));
+ } else {
+ success = 1;
+ }
+ }
+
+ return success;
+}
+#endif // !_WIN32
+
+#if !defined(NO_SSL)
+static pthread_mutex_t *ssl_mutexes;
+
+// Return OpenSSL error message
+static const char *ssl_error(void) {
+ unsigned long err;
+ err = ERR_get_error();
+ return err == 0 ? "" : ERR_error_string(err, NULL);
+}
+
+static void ssl_locking_callback(int mode, int mutex_num, const char *file,
+ int line) {
+ line = 0; // Unused
+ file = NULL; // Unused
+
+ if (mode & CRYPTO_LOCK) {
+ (void) pthread_mutex_lock(&ssl_mutexes[mutex_num]);
+ } else {
+ (void) pthread_mutex_unlock(&ssl_mutexes[mutex_num]);
+ }
+}
+
+static unsigned long ssl_id_callback(void) {
+ return (unsigned long) pthread_self();
+}
+
+#if !defined(NO_SSL_DL)
+static int load_dll(struct mg_context *ctx, const char *dll_name,
+ struct ssl_func *sw) {
+ union {void *p; void (*fp)(void);} u;
+ void *dll_handle;
+ struct ssl_func *fp;
+
+ if ((dll_handle = dlopen(dll_name, RTLD_LAZY)) == NULL) {
+ cry(fc(ctx), "%s: cannot load %s", __func__, dll_name);
+ return 0;
+ }
+
+ for (fp = sw; fp->name != NULL; fp++) {
+#ifdef _WIN32
+ // GetProcAddress() returns pointer to function
+ u.fp = (void (*)(void)) dlsym(dll_handle, fp->name);
+#else
+ // dlsym() on UNIX returns void *. ISO C forbids casts of data pointers to
+ // function pointers. We need to use a union to make a cast.
+ u.p = dlsym(dll_handle, fp->name);
+#endif // _WIN32
+ if (u.fp == NULL) {
+ cry(fc(ctx), "%s: %s: cannot find %s", __func__, dll_name, fp->name);
+ return 0;
+ } else {
+ fp->ptr = u.fp;
+ }
+ }
+
+ return 1;
+}
+#endif // NO_SSL_DL
+
+// Dynamically load SSL library. Set up ctx->ssl_ctx pointer.
+static int set_ssl_option(struct mg_context *ctx) {
+ int i, size;
+ const char *pem;
+
+ // If PEM file is not specified, skip SSL initialization.
+ if ((pem = ctx->config[SSL_CERTIFICATE]) == NULL) {
+ return 1;
+ }
+
+#if !defined(NO_SSL_DL)
+ if (!load_dll(ctx, SSL_LIB, ssl_sw) ||
+ !load_dll(ctx, CRYPTO_LIB, crypto_sw)) {
+ return 0;
+ }
+#endif // NO_SSL_DL
+
+ // Initialize SSL crap
+ SSL_library_init();
+ SSL_load_error_strings();
+
+ if ((ctx->client_ssl_ctx = SSL_CTX_new(SSLv23_client_method())) == NULL) {
+ cry(fc(ctx), "SSL_CTX_new (client) error: %s", ssl_error());
+ }
+
+ if ((ctx->ssl_ctx = SSL_CTX_new(SSLv23_server_method())) == NULL) {
+ cry(fc(ctx), "SSL_CTX_new (server) error: %s", ssl_error());
+ return 0;
+ }
+
+ // If user callback returned non-NULL, that means that user callback has
+ // set up certificate itself. In this case, skip sertificate setting.
+ if (call_user(fc(ctx), MG_INIT_SSL) == NULL &&
+ (SSL_CTX_use_certificate_file(ctx->ssl_ctx, pem, SSL_FILETYPE_PEM) == 0 ||
+ SSL_CTX_use_PrivateKey_file(ctx->ssl_ctx, pem, SSL_FILETYPE_PEM) == 0)) {
+ cry(fc(ctx), "%s: cannot open %s: %s", __func__, pem, ssl_error());
+ return 0;
+ }
+
+ if (pem != NULL) {
+ (void) SSL_CTX_use_certificate_chain_file(ctx->ssl_ctx, pem);
+ }
+
+ // Initialize locking callbacks, needed for thread safety.
+ // http://www.openssl.org/support/faq.html#PROG1
+ size = sizeof(pthread_mutex_t) * CRYPTO_num_locks();
+ if ((ssl_mutexes = (pthread_mutex_t *) malloc((size_t)size)) == NULL) {
+ cry(fc(ctx), "%s: cannot allocate mutexes: %s", __func__, ssl_error());
+ return 0;
+ }
+
+ for (i = 0; i < CRYPTO_num_locks(); i++) {
+ pthread_mutex_init(&ssl_mutexes[i], NULL);
+ }
+
+ CRYPTO_set_locking_callback(&ssl_locking_callback);
+ CRYPTO_set_id_callback(&ssl_id_callback);
+
+ return 1;
+}
+
+static void uninitialize_ssl(struct mg_context *ctx) {
+ int i;
+ if (ctx->ssl_ctx != NULL) {
+ CRYPTO_set_locking_callback(NULL);
+ for (i = 0; i < CRYPTO_num_locks(); i++) {
+ pthread_mutex_destroy(&ssl_mutexes[i]);
+ }
+ CRYPTO_set_locking_callback(NULL);
+ CRYPTO_set_id_callback(NULL);
+ }
+}
+#endif // !NO_SSL
+
+static int set_gpass_option(struct mg_context *ctx) {
+ struct mgstat mgstat;
+ const char *path = ctx->config[GLOBAL_PASSWORDS_FILE];
+ return path == NULL || mg_stat(path, &mgstat) == 0;
+}
+
+static int set_acl_option(struct mg_context *ctx) {
+ return check_acl(ctx, (uint32_t) 0x7f000001UL) != -1;
+}
+
+static void reset_per_request_attributes(struct mg_connection *conn) {
+ conn->path_info = conn->log_message = NULL;
+ conn->num_bytes_sent = conn->consumed_content = 0;
+ conn->status_code = -1;
+ conn->must_close = conn->request_len = conn->throttle = 0;
+}
+
+static void close_socket_gracefully(struct mg_connection *conn) {
+ char buf[MG_BUF_LEN];
+ struct linger linger;
+ int n, sock = conn->client.sock;
+
+ // Set linger option to avoid socket hanging out after close. This prevent
+ // ephemeral port exhaust problem under high QPS.
+ linger.l_onoff = 1;
+ linger.l_linger = 1;
+ setsockopt(sock, SOL_SOCKET, SO_LINGER, (char *) &linger, sizeof(linger));
+
+ // Send FIN to the client
+ (void) shutdown(sock, SHUT_WR);
+ set_non_blocking_mode(sock);
+
+ // Read and discard pending incoming data. If we do not do that and close the
+ // socket, the data in the send buffer may be discarded. This
+ // behaviour is seen on Windows, when client keeps sending data
+ // when server decides to close the connection; then when client
+ // does recv() it gets no data back.
+ do {
+ n = pull(NULL, conn, buf, sizeof(buf));
+ } while (n > 0);
+
+ // Now we know that our FIN is ACK-ed, safe to close
+ (void) closesocket(sock);
+}
+
+static void close_connection(struct mg_connection *conn) {
+ if (conn->ssl) {
+ SSL_free(conn->ssl);
+ conn->ssl = NULL;
+ }
+
+ if (conn->client.sock != INVALID_SOCKET) {
+ close_socket_gracefully(conn);
+ }
+}
+
+void mg_close_connection(struct mg_connection *conn) {
+ close_connection(conn);
+ free(conn);
+}
+
+struct mg_connection *mg_connect(struct mg_context *ctx,
+ const char *host, int port, int use_ssl) {
+ struct mg_connection *newconn = NULL;
+ struct sockaddr_in sin;
+ struct hostent *he;
+ int sock;
+
+ if (use_ssl && (ctx == NULL || ctx->client_ssl_ctx == NULL)) {
+ cry(fc(ctx), "%s: SSL is not initialized", __func__);
+ } else if ((he = gethostbyname(host)) == NULL) {
+ cry(fc(ctx), "%s: gethostbyname(%s): %s", __func__, host, strerror(ERRNO));
+ } else if ((sock = socket(PF_INET, SOCK_STREAM, 0)) == INVALID_SOCKET) {
+ cry(fc(ctx), "%s: socket: %s", __func__, strerror(ERRNO));
+ } else {
+ sin.sin_family = AF_INET;
+ sin.sin_port = htons((uint16_t) port);
+ sin.sin_addr = * (struct in_addr *) he->h_addr_list[0];
+ if (connect(sock, (struct sockaddr *) &sin, sizeof(sin)) != 0) {
+ cry(fc(ctx), "%s: connect(%s:%d): %s", __func__, host, port,
+ strerror(ERRNO));
+ closesocket(sock);
+ } else if ((newconn = (struct mg_connection *)
+ calloc(1, sizeof(*newconn))) == NULL) {
+ cry(fc(ctx), "%s: calloc: %s", __func__, strerror(ERRNO));
+ closesocket(sock);
+ } else {
+ newconn->ctx = ctx;
+ newconn->client.sock = sock;
+ newconn->client.rsa.sin = sin;
+ newconn->client.is_ssl = use_ssl;
+ if (use_ssl) {
+ sslize(newconn, ctx->client_ssl_ctx, SSL_connect);
+ }
+ }
+ }
+
+ return newconn;
+}
+
+FILE *mg_fetch(struct mg_context *ctx, const char *url, const char *path,
+ char *buf, size_t buf_len, struct mg_request_info *ri) {
+ struct mg_connection *newconn;
+ int n, req_length, data_length, port;
+ char host[1025], proto[10], buf2[MG_BUF_LEN];
+ FILE *fp = NULL;
+
+ if (sscanf(url, "%9[htps]://%1024[^:]:%d/%n", proto, host, &port, &n) == 3) {
+ } else if (sscanf(url, "%9[htps]://%1024[^/]/%n", proto, host, &n) == 2) {
+ port = mg_strcasecmp(proto, "https") == 0 ? 443 : 80;
+ } else {
+ cry(fc(ctx), "%s: invalid URL: [%s]", __func__, url);
+ return NULL;
+ }
+
+ if ((newconn = mg_connect(ctx, host, port,
+ !strcmp(proto, "https"))) == NULL) {
+ cry(fc(ctx), "%s: mg_connect(%s): %s", __func__, url, strerror(ERRNO));
+ } else {
+ mg_printf(newconn, "GET /%s HTTP/1.0\r\nHost: %s\r\n\r\n", url + n, host);
+ data_length = 0;
+ req_length = read_request(NULL, newconn, buf, buf_len, &data_length);
+ if (req_length <= 0) {
+ cry(fc(ctx), "%s(%s): invalid HTTP reply", __func__, url);
+ } else if (parse_http_response(buf, req_length, ri) <= 0) {
+ cry(fc(ctx), "%s(%s): cannot parse HTTP headers", __func__, url);
+ } else if ((fp = fopen(path, "w+b")) == NULL) {
+ cry(fc(ctx), "%s: fopen(%s): %s", __func__, path, strerror(ERRNO));
+ } else {
+ // Write chunk of data that may be in the user's buffer
+ data_length -= req_length;
+ if (data_length > 0 &&
+ fwrite(buf + req_length, 1, data_length, fp) != (size_t) data_length) {
+ cry(fc(ctx), "%s: fwrite(%s): %s", __func__, path, strerror(ERRNO));
+ fclose(fp);
+ fp = NULL;
+ }
+ // Read the rest of the response and write it to the file. Do not use
+ // mg_read() cause we didn't set newconn->content_len properly.
+ while (fp && (data_length = pull(0, newconn, buf2, sizeof(buf2))) > 0) {
+ if (fwrite(buf2, 1, data_length, fp) != (size_t) data_length) {
+ cry(fc(ctx), "%s: fwrite(%s): %s", __func__, path, strerror(ERRNO));
+ fclose(fp);
+ fp = NULL;
+ break;
+ }
+ }
+ }
+ mg_close_connection(newconn);
+ }
+
+ return fp;
+}
+
+static int is_valid_uri(const char *uri) {
+ // Conform to http://www.w3.org/Protocols/rfc2616/rfc2616-sec5.html#sec5.1.2
+ // URI can be an asterisk (*) or should start with slash.
+ return uri[0] == '/' || (uri[0] == '*' && uri[1] == '\0');
+}
+
+static void process_new_connection(struct mg_connection *conn) {
+ struct mg_request_info *ri = &conn->request_info;
+ int keep_alive_enabled, discard_len;
+ const char *cl;
+
+ keep_alive_enabled = !strcmp(conn->ctx->config[ENABLE_KEEP_ALIVE], "yes");
+
+ do {
+ reset_per_request_attributes(conn);
+ conn->request_len = read_request(NULL, conn, conn->buf, conn->buf_size,
+ &conn->data_len);
+ assert(conn->request_len < 0 || conn->data_len >= conn->request_len);
+ if (conn->request_len == 0 && conn->data_len == conn->buf_size) {
+ send_http_error(conn, 413, "Request Too Large", "%s", "");
+ return;
+ } if (conn->request_len <= 0) {
+ return; // Remote end closed the connection
+ }
+ if (parse_http_request(conn->buf, conn->buf_size, ri) <= 0 ||
+ !is_valid_uri(ri->uri)) {
+ // Do not put garbage in the access log, just send it back to the client
+ send_http_error(conn, 400, "Bad Request",
+ "Cannot parse HTTP request: [%.*s]", conn->data_len, conn->buf);
+ conn->must_close = 1;
+ } else if (strcmp(ri->http_version, "1.0") &&
+ strcmp(ri->http_version, "1.1")) {
+ // Request seems valid, but HTTP version is strange
+ send_http_error(conn, 505, "HTTP version not supported", "%s", "");
+ log_access(conn);
+ } else {
+ // Request is valid, handle it
+ if ((cl = get_header(ri, "Content-Length")) != NULL) {
+ conn->content_len = strtoll(cl, NULL, 10);
+ } else if (!mg_strcasecmp(ri->request_method, "POST") ||
+ !mg_strcasecmp(ri->request_method, "PUT")) {
+ conn->content_len = -1;
+ } else {
+ conn->content_len = 0;
+ }
+ conn->birth_time = time(NULL);
+ handle_request(conn);
+ call_user(conn, MG_REQUEST_COMPLETE);
+ log_access(conn);
+ }
+ if (ri->remote_user != NULL) {
+ free((void *) ri->remote_user);
+ }
+
+ // Discard all buffered data for this request
+ discard_len = conn->content_len >= 0 &&
+ conn->request_len + conn->content_len < (int64_t) conn->data_len ?
+ (int) (conn->request_len + conn->content_len) : conn->data_len;
+ memmove(conn->buf, conn->buf + discard_len, conn->data_len - discard_len);
+ conn->data_len -= discard_len;
+ assert(conn->data_len >= 0);
+ assert(conn->data_len <= conn->buf_size);
+
+ } while (conn->ctx->stop_flag == 0 &&
+ keep_alive_enabled &&
+ conn->content_len >= 0 &&
+ should_keep_alive(conn));
+}
+
+// Worker threads take accepted socket from the queue
+static int consume_socket(struct mg_context *ctx, struct socket *sp) {
+ (void) pthread_mutex_lock(&ctx->mutex);
+ DEBUG_TRACE(("going idle"));
+
+ // If the queue is empty, wait. We're idle at this point.
+ while (ctx->sq_head == ctx->sq_tail && ctx->stop_flag == 0) {
+ pthread_cond_wait(&ctx->sq_full, &ctx->mutex);
+ }
+
+ // If we're stopping, sq_head may be equal to sq_tail.
+ if (ctx->sq_head > ctx->sq_tail) {
+ // Copy socket from the queue and increment tail
+ *sp = ctx->queue[ctx->sq_tail % ARRAY_SIZE(ctx->queue)];
+ ctx->sq_tail++;
+ DEBUG_TRACE(("grabbed socket %d, going busy", sp->sock));
+
+ // Wrap pointers if needed
+ while (ctx->sq_tail > (int) ARRAY_SIZE(ctx->queue)) {
+ ctx->sq_tail -= ARRAY_SIZE(ctx->queue);
+ ctx->sq_head -= ARRAY_SIZE(ctx->queue);
+ }
+ }
+
+ (void) pthread_cond_signal(&ctx->sq_empty);
+ (void) pthread_mutex_unlock(&ctx->mutex);
+
+ return !ctx->stop_flag;
+}
+
+static void worker_thread(struct mg_context *ctx) {
+ struct mg_connection *conn;
+
+ conn = (struct mg_connection *) calloc(1, sizeof(*conn) + MAX_REQUEST_SIZE);
+ if (conn == NULL) {
+ cry(fc(ctx), "%s", "Cannot create new connection struct, OOM");
+ } else {
+ conn->buf_size = MAX_REQUEST_SIZE;
+ conn->buf = (char *) (conn + 1);
+
+ // Call consume_socket() even when ctx->stop_flag > 0, to let it signal
+ // sq_empty condvar to wake up the master waiting in produce_socket()
+ while (consume_socket(ctx, &conn->client)) {
+ conn->birth_time = time(NULL);
+ conn->ctx = ctx;
+
+ // Fill in IP, port info early so even if SSL setup below fails,
+ // error handler would have the corresponding info.
+ // Thanks to Johannes Winkelmann for the patch.
+ // TODO(lsm): Fix IPv6 case
+ conn->request_info.remote_port = ntohs(conn->client.rsa.sin.sin_port);
+ memcpy(&conn->request_info.remote_ip,
+ &conn->client.rsa.sin.sin_addr.s_addr, 4);
+ conn->request_info.remote_ip = ntohl(conn->request_info.remote_ip);
+ conn->request_info.is_ssl = conn->client.is_ssl;
+
+ if (!conn->client.is_ssl ||
+ (conn->client.is_ssl &&
+ sslize(conn, conn->ctx->ssl_ctx, SSL_accept))) {
+ process_new_connection(conn);
+ }
+
+ close_connection(conn);
+ }
+ free(conn);
+ }
+
+ // Signal master that we're done with connection and exiting
+ (void) pthread_mutex_lock(&ctx->mutex);
+ ctx->num_threads--;
+ (void) pthread_cond_signal(&ctx->cond);
+ assert(ctx->num_threads >= 0);
+ (void) pthread_mutex_unlock(&ctx->mutex);
+
+ DEBUG_TRACE(("exiting"));
+}
+
+// Master thread adds accepted socket to a queue
+static void produce_socket(struct mg_context *ctx, const struct socket *sp) {
+ (void) pthread_mutex_lock(&ctx->mutex);
+
+ // If the queue is full, wait
+ while (ctx->stop_flag == 0 &&
+ ctx->sq_head - ctx->sq_tail >= (int) ARRAY_SIZE(ctx->queue)) {
+ (void) pthread_cond_wait(&ctx->sq_empty, &ctx->mutex);
+ }
+
+ if (ctx->sq_head - ctx->sq_tail < (int) ARRAY_SIZE(ctx->queue)) {
+ // Copy socket to the queue and increment head
+ ctx->queue[ctx->sq_head % ARRAY_SIZE(ctx->queue)] = *sp;
+ ctx->sq_head++;
+ DEBUG_TRACE(("queued socket %d", sp->sock));
+ }
+
+ (void) pthread_cond_signal(&ctx->sq_full);
+ (void) pthread_mutex_unlock(&ctx->mutex);
+}
+
+static void accept_new_connection(const struct socket *listener,
+ struct mg_context *ctx) {
+ struct socket accepted;
+ char src_addr[20];
+ socklen_t len;
+ int allowed;
+
+ len = sizeof(accepted.rsa);
+ accepted.lsa = listener->lsa;
+ accepted.sock = accept(listener->sock, &accepted.rsa.sa, &len);
+ if (accepted.sock != INVALID_SOCKET) {
+ allowed = check_acl(ctx, ntohl(* (uint32_t *) &accepted.rsa.sin.sin_addr));
+ if (allowed) {
+ // Put accepted socket structure into the queue
+ DEBUG_TRACE(("accepted socket %d", accepted.sock));
+ accepted.is_ssl = listener->is_ssl;
+ produce_socket(ctx, &accepted);
+ } else {
+ sockaddr_to_string(src_addr, sizeof(src_addr), &accepted.rsa);
+ cry(fc(ctx), "%s: %s is not allowed to connect", __func__, src_addr);
+ (void) closesocket(accepted.sock);
+ }
+ }
+}
+
+static void master_thread(struct mg_context *ctx) {
+ fd_set read_set;
+ struct timeval tv;
+ struct socket *sp;
+ int max_fd;
+
+ // Increase priority of the master thread
+#if defined(_WIN32)
+ SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_ABOVE_NORMAL);
+#endif
+
+#if defined(ISSUE_317)
+ struct sched_param sched_param;
+ sched_param.sched_priority = sched_get_priority_max(SCHED_RR);
+ pthread_setschedparam(pthread_self(), SCHED_RR, &sched_param);
+#endif
+
+ while (ctx->stop_flag == 0) {
+ FD_ZERO(&read_set);
+ max_fd = -1;
+
+ // Add listening sockets to the read set
+ for (sp = ctx->listening_sockets; sp != NULL; sp = sp->next) {
+ add_to_set(sp->sock, &read_set, &max_fd);
+ }
+
+ tv.tv_sec = 0;
+ tv.tv_usec = 200 * 1000;
+
+ if (select(max_fd + 1, &read_set, NULL, NULL, &tv) < 0) {
+#ifdef _WIN32
+ // On windows, if read_set and write_set are empty,
+ // select() returns "Invalid parameter" error
+ // (at least on my Windows XP Pro). So in this case, we sleep here.
+ mg_sleep(1000);
+#endif // _WIN32
+ } else {
+ for (sp = ctx->listening_sockets; sp != NULL; sp = sp->next) {
+ if (ctx->stop_flag == 0 && FD_ISSET(sp->sock, &read_set)) {
+ accept_new_connection(sp, ctx);
+ }
+ }
+ }
+ }
+ DEBUG_TRACE(("stopping workers"));
+
+ // Stop signal received: somebody called mg_stop. Quit.
+ close_all_listening_sockets(ctx);
+
+ // Wakeup workers that are waiting for connections to handle.
+ pthread_cond_broadcast(&ctx->sq_full);
+
+ // Wait until all threads finish
+ (void) pthread_mutex_lock(&ctx->mutex);
+ while (ctx->num_threads > 0) {
+ (void) pthread_cond_wait(&ctx->cond, &ctx->mutex);
+ }
+ (void) pthread_mutex_unlock(&ctx->mutex);
+
+ // All threads exited, no sync is needed. Destroy mutex and condvars
+ (void) pthread_mutex_destroy(&ctx->mutex);
+ (void) pthread_cond_destroy(&ctx->cond);
+ (void) pthread_cond_destroy(&ctx->sq_empty);
+ (void) pthread_cond_destroy(&ctx->sq_full);
+
+#if !defined(NO_SSL)
+ uninitialize_ssl(ctx);
+#endif
+ DEBUG_TRACE(("exiting"));
+
+ // Signal mg_stop() that we're done.
+ // WARNING: This must be the very last thing this
+ // thread does, as ctx becomes invalid after this line.
+ ctx->stop_flag = 2;
+}
+
+static void free_context(struct mg_context *ctx) {
+ int i;
+
+ // Deallocate config parameters
+ for (i = 0; i < NUM_OPTIONS; i++) {
+ if (ctx->config[i] != NULL)
+ free(ctx->config[i]);
+ }
+
+ // Deallocate SSL context
+ if (ctx->ssl_ctx != NULL) {
+ SSL_CTX_free(ctx->ssl_ctx);
+ }
+ if (ctx->client_ssl_ctx != NULL) {
+ SSL_CTX_free(ctx->client_ssl_ctx);
+ }
+#ifndef NO_SSL
+ if (ssl_mutexes != NULL) {
+ free(ssl_mutexes);
+ ssl_mutexes = NULL;
+ }
+#endif // !NO_SSL
+
+ // Deallocate context itself
+ free(ctx);
+}
+
+void mg_stop(struct mg_context *ctx) {
+ ctx->stop_flag = 1;
+
+ // Wait until mg_fini() stops
+ while (ctx->stop_flag != 2) {
+ (void) mg_sleep(10);
+ }
+ free_context(ctx);
+
+#if defined(_WIN32) && !defined(__SYMBIAN32__)
+ (void) WSACleanup();
+#endif // _WIN32
+}
+
+struct mg_context *mg_start(mg_callback_t user_callback, void *user_data,
+ const char **options) {
+ struct mg_context *ctx;
+ const char *name, *value, *default_value;
+ int i;
+
+#if defined(_WIN32) && !defined(__SYMBIAN32__)
+ WSADATA data;
+ WSAStartup(MAKEWORD(2,2), &data);
+ InitializeCriticalSection(&global_log_file_lock);
+#endif // _WIN32
+
+ // Allocate context and initialize reasonable general case defaults.
+ // TODO(lsm): do proper error handling here.
+ if ((ctx = (struct mg_context *) calloc(1, sizeof(*ctx))) == NULL) {
+ return NULL;
+ }
+ ctx->user_callback = user_callback;
+ ctx->user_data = user_data;
+
+ while (options && (name = *options++) != NULL) {
+ if ((i = get_option_index(name)) == -1) {
+ cry(fc(ctx), "Invalid option: %s", name);
+ free_context(ctx);
+ return NULL;
+ } else if ((value = *options++) == NULL) {
+ cry(fc(ctx), "%s: option value cannot be NULL", name);
+ free_context(ctx);
+ return NULL;
+ }
+ if (ctx->config[i] != NULL) {
+ cry(fc(ctx), "warning: %s: duplicate option", name);
+ }
+ ctx->config[i] = mg_strdup(value);
+ DEBUG_TRACE(("[%s] -> [%s]", name, value));
+ }
+
+ // Set default value if needed
+ for (i = 0; config_options[i * ENTRIES_PER_CONFIG_OPTION] != NULL; i++) {
+ default_value = config_options[i * ENTRIES_PER_CONFIG_OPTION + 2];
+ if (ctx->config[i] == NULL && default_value != NULL) {
+ ctx->config[i] = mg_strdup(default_value);
+ DEBUG_TRACE(("Setting default: [%s] -> [%s]",
+ config_options[i * ENTRIES_PER_CONFIG_OPTION + 1],
+ default_value));
+ }
+ }
+
+ // NOTE(lsm): order is important here. SSL certificates must
+ // be initialized before listening ports. UID must be set last.
+ if (!set_gpass_option(ctx) ||
+#if !defined(NO_SSL)
+ !set_ssl_option(ctx) ||
+#endif
+ !set_ports_option(ctx) ||
+#if !defined(_WIN32)
+ !set_uid_option(ctx) ||
+#endif
+ !set_acl_option(ctx)) {
+ free_context(ctx);
+ return NULL;
+ }
+
+#if !defined(_WIN32) && !defined(__SYMBIAN32__)
+ // Ignore SIGPIPE signal, so if browser cancels the request, it
+ // won't kill the whole process.
+ (void) signal(SIGPIPE, SIG_IGN);
+ // Also ignoring SIGCHLD to let the OS to reap zombies properly.
+ (void) signal(SIGCHLD, SIG_IGN);
+#endif // !_WIN32
+
+ (void) pthread_mutex_init(&ctx->mutex, NULL);
+ (void) pthread_cond_init(&ctx->cond, NULL);
+ (void) pthread_cond_init(&ctx->sq_empty, NULL);
+ (void) pthread_cond_init(&ctx->sq_full, NULL);
+
+ // Start master (listening) thread
+ mg_start_thread((mg_thread_func_t) master_thread, ctx);
+
+ // Start worker threads
+ for (i = 0; i < atoi(ctx->config[NUM_THREADS]); i++) {
+ if (mg_start_thread((mg_thread_func_t) worker_thread, ctx) != 0) {
+ cry(fc(ctx), "Cannot start worker thread: %d", ERRNO);
+ } else {
+ ctx->num_threads++;
+ }
+ }
+
+ return ctx;
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-01 01:04:50 +0000