1 // httpd.hxx -- FGFS http property manager interface / external script
4 // Written by Curtis Olson, started June 2001.
6 // Copyright (C) 2001 Curtis L. Olson - http://www.flightgear.org/~curt
8 // Jpeg Image Support added August 2001
9 // by Norman Vine - nhv@cape.com
11 // This program is free software; you can redistribute it and/or
12 // modify it under the terms of the GNU General Public License as
13 // published by the Free Software Foundation; either version 2 of the
14 // License, or (at your option) any later version.
16 // This program is distributed in the hope that it will be useful, but
17 // WITHOUT ANY WARRANTY; without even the implied warranty of
18 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19 // General Public License for more details.
21 // You should have received a copy of the GNU General Public License
22 // along with this program; if not, write to the Free Software
23 // Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
32 #include <simgear/compiler.h>
34 #include <stdlib.h> // atoi() atof()
38 #include <simgear/debug/logstream.hxx>
39 #include <simgear/io/iochannel.hxx>
40 #include <simgear/math/sg_types.hxx>
41 #include <simgear/props/props.hxx>
43 #include <Main/fg_props.hxx>
44 #include <Main/globals.hxx>
46 #include "jpg-httpd.hxx"
49 #define __MAX_HTTP_BLOCK_SIZE 4096
50 #define __MAX_STRING_SIZE 2048
51 #define __TIMEOUT_COUNT 5
52 #define __HTTP_GET_STRING "GET "
59 bool FGJpegHttpd::open() {
61 SG_LOG( SG_IO, SG_ALERT, "This shouldn't happen, but the channel "
62 << "is already in use, ignoring" );
66 imageServer = new HttpdImageServer( port );
68 set_hz( 5 ); // default to processing requests @ 5Hz
75 bool FGJpegHttpd::process() {
82 bool FGJpegHttpd::close() {
88 // Handle http GET requests
89 void HttpdImageChannel :: foundTerminator( void ) {
94 char szResponse[__MAX_STRING_SIZE];
95 char *pRequest = buffer.getData();
98 int nTimeoutCount = 0;
104 if ( strstr( pRequest, __HTTP_GET_STRING ) != NULL ) {
106 SG_LOG( SG_IO, SG_DEBUG, "<<<<<<<<< HTTP Request : " << pRequest );
108 nImageLen = JpgFactory -> render();
109 nBlockSize = ( nImageLen < __MAX_HTTP_BLOCK_SIZE ? nImageLen : __MAX_HTTP_BLOCK_SIZE );
112 strcpy( szResponse, "HTTP/1.1 200 OK" );
113 strcat( szResponse, getTerminator() );
114 strcat( szResponse, "Content-Type: image/jpeg" );
115 strcat( szResponse, getTerminator() );
117 SG_LOG( SG_IO, SG_DEBUG, "info->numbytes = " << nImageLen );
118 sprintf( szTemp, "Content-Length: %d", nImageLen );
119 strcat( szResponse, szTemp );
121 strcat( szResponse, getTerminator() );
122 strcat( szResponse, "Connection: close" );
123 strcat( szResponse, getTerminator() );
124 strcat( szResponse, getTerminator() );
126 if( getHandle() == -1 ) {
127 SG_LOG( SG_IO, SG_DEBUG, "<<<<<<<<< Invalid socket handle. Ignoring request.\n" );
129 SG_LOG( SG_IO, SG_DEBUG, "<<<<<<<<< End of image Transmission.\n" );
133 if( send( ( char * ) szResponse, strlen( szResponse ) ) <= 0 ) {
134 SG_LOG( SG_IO, SG_DEBUG, "<<<<<<<<< Error to send HTTP response. Ignoring request.\n" );
136 SG_LOG( SG_IO, SG_DEBUG, "<<<<<<<<< End of image Transmission.\n" );
141 * Send block with size defined by __MAX_HTTP_BLOCK_SIZE
143 while( nStep <= nImageLen ) {
146 if( getHandle() == -1 ) {
147 SG_LOG( SG_IO, SG_DEBUG, "<<<<<<<<< Invalid socket handle. Ignoring request.\n" );
151 nBytesSent = send( ( char * ) JpgFactory -> data() + nStep, nBlockSize );
153 if( nBytesSent <= 0 ) {
154 if( nTimeoutCount == __TIMEOUT_COUNT ) {
155 SG_LOG( SG_IO, SG_DEBUG, "<<<<<<<<< Timeout reached. Exiting before end of image transmission.\n" );
160 SG_LOG( SG_IO, SG_DEBUG, "<<<<<<<<< Zero bytes sent.\n" );
171 SG_LOG( SG_IO, SG_DEBUG, ">>>>>>>>> (" << nBufferCount << ") BLOCK STEP " << nStep << " - IMAGELEN " << nImageLen << " - BLOCKSIZE " << nBlockSize << " - SENT " << nBytesSent );
174 * Calculate remaining image.
176 if( ( nStep + nBlockSize ) >= nImageLen ) {
177 nBlockSize = ( nImageLen - nStep );
190 SG_LOG( SG_IO, SG_DEBUG, "<<<<<<<<< End of image Transmission.\n" );
193 SG_LOG( SG_IO, SG_DEBUG, "!!! NO IMAGE !!! info -> numbytes = " << nImageLen );
197 * Release JPEG buffer.
199 JpgFactory -> destroy();