> The problem was if a client connects and closes the connection for
> whatever reason while the jpg-httpd is sending the image (e.g. web
> browser refreshes when loading the first image), a SIGPIPE will be
> raised which isn't handled and causes FG to simply exits.
>
> The attached fix calls send with MSG_NOSIGNAL which tells the call
> not to raise SIGPIPE, and so we can handle the EPIPE.
>
> This patch works with both plib and osg branch.
Patch redone, since MSG_NOSIGNAL seems to be a Linux only thing.
Pigeon.
diff --git a/src/Network/jpg-httpd.cxx b/src/Network/jpg-httpd.cxx
index 3deadf4..c94f472 100644
--- a/src/Network/jpg-httpd.cxx
+++ b/src/Network/jpg-httpd.cxx
@@ -44,6 +44,10 @@
#include <Main/globals.hxx>
#include <Main/renderer.hxx>
+#if defined(__linux__)
+#include <sys/socket.h>
+#endif
+
#include "jpg-httpd.hxx"
#define __MAX_HTTP_BLOCK_SIZE 4096
@@ -143,7 +147,12 @@ void HttpdImageChannel :: foundTerminator( void ) {
return;
}
- if( send( ( char * ) szResponse, strlen( szResponse ) ) <= 0 ) {
+ int flags = 0;
+#if defined(__linux__)
+ flags = MSG_NOSIGNAL;
+#endif
+
+ if( send( ( char * ) szResponse, strlen( szResponse ), flags ) <= 0 ) {
SG_LOG( SG_IO, SG_DEBUG, "<<<<<<<<< Error to send HTTP response. Ignoring request.\n" );
buffer.remove();
SG_LOG( SG_IO, SG_DEBUG, "<<<<<<<<< End of image Transmission.\n" );
@@ -161,9 +170,18 @@ void HttpdImageChannel :: foundTerminator( void ) {
break;
}
- nBytesSent = send( ( char * ) JpgFactory -> data() + nStep, nBlockSize );
+ errno = 0;
+ nBytesSent = send( ( char * ) JpgFactory -> data() + nStep, nBlockSize, flags );
if( nBytesSent <= 0 ) {
+
+ if( errno == EPIPE ) {
+ SG_LOG( SG_IO, SG_DEBUG, "<<<<<<<<< Error sending image. Aborting.\n" );
+ buffer.remove();
+ SG_LOG( SG_IO, SG_DEBUG, "<<<<<<<<< End of image Transmission.\n" );
+ return;
+ }
+
if( nTimeoutCount == __TIMEOUT_COUNT ) {
SG_LOG( SG_IO, SG_DEBUG, "<<<<<<<<< Timeout reached. Exiting before end of image transmission.\n" );
nTimeoutCount = 0;
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