1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
|
/*
* bitz-server, An ICAP server implementation in C++
* Copyright (C) 2012 Uditha Atukorala
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "worker.h"
#include "util.h"
#include "options_request_handler.h"
#include "reqmod_request_handler.h"
#include "respmod_request_handler.h"
#include <icap/util.h>
#include <icap/request_header.h>
namespace bitz {
Worker::Worker() {
// logger
_logger = spdlog::get( "bitz-server" );
// load request handlers
load_req_handlers();
}
Worker::~Worker() {
_logger->debug( "[worker] exiting" );
// cleanup request handlers
util::delete_req_handlers( _req_handlers );
delete _req_handlers["OPTIONS"];
}
void Worker::run( psocksxx::tcpnsockstream * server_sock, unsigned int max_requests,
unsigned int comm_timeout ) throw() {
// client socket stream
psocksxx::nsockstream * client_sock;
while ( max_requests > 0 ) {
_logger->debug( std::string( "[worker] waiting for a connection" ) );
try {
// accept a client connection
client_sock = server_sock->accept();
// FIXME: log accepted client details (e.g. address, port etc.)
_logger->debug( std::string( "[worker] new connection accepted on [...]" ) );
// set timeout value
if ( comm_timeout > 0 ) {
client_sock->timeout( comm_timeout, 0 );
// TODO: add debug logging
}
} catch ( psocksxx::sockexception &e ) {
// failed to accept client connection
_logger->error( std::string( "[worker] failed to accept connection: " ).append( e.what() ) );
// update request count
max_requests--;
continue;
}
// handle client request(s)
max_requests = serve_client( client_sock, max_requests );
// destroy / close connection
delete client_sock;
};
}
void Worker::load_req_handlers() throw() {
OptionsRequestHandler * options_handler;
// OPTIONS handler
options_handler = new OptionsRequestHandler();
_req_handlers["OPTIONS"] = options_handler;
/* request handlers */
// REQMOD
_req_handlers["REQMOD"] = new ReqmodRequestHandler();
options_handler->register_handler( _req_handlers["REQMOD"] );
// RESPMOD
_req_handlers["RESPMOD"] = new RespmodRequestHandler();
options_handler->register_handler( _req_handlers["RESPMOD"] );
}
unsigned int Worker::serve_client( psocksxx::nsockstream * client_sock, unsigned int max_requests ) throw() {
icap::RequestHeader * req_header = NULL;
icap::Response * response;
RequestHandler * req_handler;
do {
// cleanup request header
if ( req_header != NULL ) {
delete req_header;
}
// request header
req_header = icap::util::read_req_header( client_sock );
_logger->debug( std::string( "[worker] request header:\r\n" ).append( req_header->raw_data() ) );
// check timeout
if ( client_sock->timedout() ) {
_logger->warn( "[worker] communication timed out..." );
return --max_requests;
}
// try to find a handler for the request
req_handler = util::find_req_handler( _req_handlers, req_header->method() );
// sanity check
if ( req_handler != NULL ) {
_logger->debug( std::string( "[worker] handling request: " ).append( req_header->method() ) );
// process the request and grab the response
response = req_handler->process( req_header, client_sock );
} else {
// unsupported request
_logger->info( std::string( "[worker] unsupported request: " ).append( req_header->method() ) );
response = new icap::Response( new icap::ResponseHeader( icap::ResponseHeader::NOT_ALLOWED ) );
}
// FIXME: this should be configurable and should default to close
// connection if the client doesn't send a connection header
if ( req_header->value( "Connection" ) == "keep-alive" ) {
response->header()->attach( "Connection" , "keep-alive" );
}
// send the response back to the client
icap::util::send_response( response, client_sock );
// cleanup
delete response;
} while ( ( --max_requests > 0 ) && ( req_header->value( "Connection" ) == "keep-alive" ) );
// cleanup request header
if ( req_header != NULL ) {
delete req_header;
}
return max_requests;
}
} /* end of namespace bitz */
|
