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/*
* 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 "logger.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() {
// load request handlers
load_req_handlers();
}
Worker::~Worker() {
// logger
Logger &logger = Logger::instance();
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() {
// logger
Logger &logger = Logger::instance();
// 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() {
// logger
Logger &logger = Logger::instance();
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 */
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