http_client lib

1 files changed, 239 insertions, 0 deletions

diff --git a/protocols/http_client.c b/protocols/http_client.c
new file mode 100644
index 00000000..f631981f
--- /dev/null
+++ b/protocols/http_client.c
@@ -0,0 +1,239 @@
+  /********************************************************************\
+  * BitlBee -- An IRC to other IM-networks gateway                     *
+  *                                                                    *
+  * Copyright 2002-2005 Wilmer van der Gaast and others                *
+  \********************************************************************/
+
+/* HTTP(S) module (actually, it only does HTTPS right now)              */
+
+/*
+  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 2 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 with
+  the Debian GNU/Linux distribution in /usr/share/common-licenses/GPL;
+  if not, write to the Free Software Foundation, Inc., 59 Temple Place,
+  Suite 330, Boston, MA  02111-1307  USA
+*/
+
+#include <string.h>
+
+#include "sock.h"
+#include "http_client.h"
+
+
+static void http_connected( gpointer data, int source, GaimInputCondition cond );
+static void http_ssl_connected( gpointer data, void *source, GaimInputCondition cond );
+static void http_incoming_data( gpointer data, int source, GaimInputCondition cond );
+
+
+void *http_dorequest( char *host, int port, http_input_function func, int ssl, char *request, gpointer data )
+{
+	struct http_request *req;
+	int error = 0;
+	
+	req = g_new0( struct http_request, 1 );
+	
+	if( ssl )
+	{
+		req->ssl = ssl_connect( host, port, http_ssl_connected, req );
+		if( req->ssl == NULL )
+			error = 1;
+	}
+	else
+	{
+		req->fd = proxy_connect( host, port, http_connected, req );
+		if( req->fd < 0 )
+			error = 1;
+	}
+	
+	if( error )
+	{
+		g_free( req );
+		return( NULL );
+	}
+	
+	req->request = g_strdup( request );
+	req->request_length = strlen( request );
+	
+	return( req );
+}
+
+/* This one is actually pretty simple... Might get more calls if we can't write 
+   the whole request at once. */
+static void http_connected( gpointer data, int source, GaimInputCondition cond )
+{
+	struct http_request *req = data;
+	int st;
+	
+	if( source < 0 )
+		goto error;
+	
+	if( req->inpa > 0 )
+		gaim_input_remove( req->inpa );
+	
+	sock_make_nonblocking( req->fd );
+	
+	if( req->ssl )
+	{
+		st = ssl_write( req->ssl, req->request + req->bytes_written,
+		                req->request_length - req->bytes_written );
+		if( st < 0 )
+		{
+			if( ssl_errno != SSL_AGAIN )
+			{
+				ssl_disconnect( req->ssl );
+				goto error;
+			}
+		}
+	}
+	else
+	{
+		st = write( source, req->request + req->bytes_written,
+		                    req->request_length - req->bytes_written );
+		if( st < 0 )
+		{
+			if( !sockerr_again() )
+			{
+				close( req->fd );
+				goto error;
+			}
+		}
+	}
+	
+	if( st > 0 )
+		req->bytes_written += st;
+	
+	if( req->bytes_written < req->request_length )
+		req->inpa = gaim_input_add( source,
+		                            req->ssl ? ssl_getdirection( req->ssl ) : GAIM_INPUT_WRITE,
+	        	                    http_connected, req );
+	else
+		req->inpa = gaim_input_add( source, GAIM_INPUT_READ, http_incoming_data, req );
+	
+	return;
+	
+error:
+	req->func( req );
+	
+	g_free( req->request );
+	g_free( req );
+	
+	return;
+}
+
+static void http_ssl_connected( gpointer data, void *source, GaimInputCondition cond )
+{
+	struct http_request *req = data;
+	
+	if( source == NULL )
+		return http_connected( data, -1, cond );
+	
+	req->fd = ssl_getfd( source );
+	
+	return http_connected( data, req->fd, cond );
+}
+
+static void http_incoming_data( gpointer data, int source, GaimInputCondition cond )
+{
+	struct http_request *req = data;
+	int evil_server = 0;
+	char buffer[2048];
+	char *end1, *end2;
+	int st;
+	
+	if( req->inpa > 0 )
+		gaim_input_remove( req->inpa );
+	
+	if( req->ssl )
+	{
+		st = ssl_read( req->ssl, buffer, sizeof( buffer ) );
+		if( st < 0 )
+		{
+			if( ssl_errno != SSL_AGAIN )
+			{
+				goto cleanup;
+			}
+		}
+		else if( st == 0 )
+		{
+			goto got_reply;
+		}
+	}
+	else
+	{
+		st = read( req->fd, buffer, sizeof( buffer ) );
+		if( st < 0 )
+		{
+			if( !sockerr_again() )
+			{
+				goto cleanup;
+			}
+		}
+		else if( st == 0 )
+		{
+			goto got_reply;
+		}
+	}
+	
+	if( st > 0 )
+	{
+		req->reply_headers = g_realloc( req->reply_headers, req->bytes_read + st + 1 );
+		memcpy( req->reply_headers + req->bytes_read, buffer, st );
+	}
+	
+	/* There will be more! */
+	req->inpa = gaim_input_add( req->fd,
+	                            req->ssl ? ssl_getdirection( req->ssl ) : GAIM_INPUT_READ,
+	                            http_incoming_data, req );
+	
+	return;
+
+got_reply:
+	/* Zero termination is very convenient. */
+	req->reply_headers[req->bytes_read] = 0;
+	
+	/* Find the separation between headers and body, and keep stupid
+	   webservers in mind. */
+	end1 = strstr( req->reply_headers, "\r\n\r\n" );
+	end2 = strstr( req->reply_headers, "\n\n" );
+	
+	if( end2 && end2 < end1 )
+	{
+		end1 = end2;
+		evil_server = 1;
+	}
+	
+	if( end1 )
+	{
+		*end1 = 0;
+		
+		if( evil_server )
+			req->reply_body = end1 + 2;
+		else
+			req->reply_body = end1 + 4;
+	}
+	
+	/* Assume that a closed connection means we're finished, this indeed
+	   breaks with keep-alive connections and faulty connections. */
+	req->finished = 1;
+
+cleanup:
+	if( req->ssl )
+		ssl_disconnect( req->ssl );
+	else
+		close( req->fd );
+	
+	req->func( req );
+	
+	g_free( req->request );
+	g_free( req->reply_headers );
+	g_free( req );
+}