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source: protocols/http_client.c @ d25f6fc

Last change on this file since d25f6fc was ad8b8a3, checked in by Wilmer van der Gaast <wilmer@…>, at 2005-12-17T20:54:06Z
Passport authentication works now.
Property mode set to `100644`
File size: 8.4 KB

Rev	Line
[8a9afe4]	1	/********************************************************************\
	2	* BitlBee -- An IRC to other IM-networks gateway *
	3	* *
	4	* Copyright 2002-2005 Wilmer van der Gaast and others *
	5	\********************************************************************/
	6
[52b3a99]	7	/* HTTP(S) module */
[8a9afe4]	8
	9	/*
	10	This program is free software; you can redistribute it and/or modify
	11	it under the terms of the GNU General Public License as published by
	12	the Free Software Foundation; either version 2 of the License, or
	13	(at your option) any later version.
	14
	15	This program is distributed in the hope that it will be useful,
	16	but WITHOUT ANY WARRANTY; without even the implied warranty of
	17	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	18	GNU General Public License for more details.
	19
	20	You should have received a copy of the GNU General Public License with
	21	the Debian GNU/Linux distribution in /usr/share/common-licenses/GPL;
	22	if not, write to the Free Software Foundation, Inc., 59 Temple Place,
	23	Suite 330, Boston, MA 02111-1307 USA
	24	*/
	25
	26	#include <string.h>
[52b3a99]	27	#include <stdio.h>
[8a9afe4]	28
	29	#include "sock.h"
	30	#include "http_client.h"
[52b3a99]	31	#include "url.h"
[8a9afe4]	32
	33
	34	static void http_connected( gpointer data, int source, GaimInputCondition cond );
	35	static void http_ssl_connected( gpointer data, void *source, GaimInputCondition cond );
	36	static void http_incoming_data( gpointer data, int source, GaimInputCondition cond );
	37
	38
[f3e1e92]	39	void http_dorequest( char host, int port, int ssl, char *request, http_input_function func, gpointer data )
[8a9afe4]	40	{
	41	struct http_request *req;
	42	int error = 0;
	43
	44	req = g_new0( struct http_request, 1 );
	45
	46	if( ssl )
	47	{
	48	req->ssl = ssl_connect( host, port, http_ssl_connected, req );
	49	if( req->ssl == NULL )
	50	error = 1;
	51	}
	52	else
	53	{
	54	req->fd = proxy_connect( host, port, http_connected, req );
	55	if( req->fd < 0 )
	56	error = 1;
	57	}
	58
	59	if( error )
	60	{
	61	g_free( req );
	62	return( NULL );
	63	}
	64
[52b3a99]	65	req->func = func;
	66	req->data = data;
[8a9afe4]	67	req->request = g_strdup( request );
	68	req->request_length = strlen( request );
	69
	70	return( req );
	71	}
	72
	73	/* This one is actually pretty simple... Might get more calls if we can't write
	74	the whole request at once. */
	75	static void http_connected( gpointer data, int source, GaimInputCondition cond )
	76	{
	77	struct http_request *req = data;
	78	int st;
	79
	80	if( source < 0 )
	81	goto error;
	82
	83	if( req->inpa > 0 )
	84	gaim_input_remove( req->inpa );
	85
	86	sock_make_nonblocking( req->fd );
	87
	88	if( req->ssl )
	89	{
	90	st = ssl_write( req->ssl, req->request + req->bytes_written,
	91	req->request_length - req->bytes_written );
	92	if( st < 0 )
	93	{
	94	if( ssl_errno != SSL_AGAIN )
	95	{
	96	ssl_disconnect( req->ssl );
	97	goto error;
	98	}
	99	}
	100	}
	101	else
	102	{
	103	st = write( source, req->request + req->bytes_written,
	104	req->request_length - req->bytes_written );
	105	if( st < 0 )
	106	{
	107	if( !sockerr_again() )
	108	{
[52b3a99]	109	closesocket( req->fd );
[8a9afe4]	110	goto error;
	111	}
	112	}
	113	}
	114
	115	if( st > 0 )
	116	req->bytes_written += st;
	117
	118	if( req->bytes_written < req->request_length )
	119	req->inpa = gaim_input_add( source,
	120	req->ssl ? ssl_getdirection( req->ssl ) : GAIM_INPUT_WRITE,
	121	http_connected, req );
	122	else
	123	req->inpa = gaim_input_add( source, GAIM_INPUT_READ, http_incoming_data, req );
	124
	125	return;
	126
	127	error:
	128	req->func( req );
	129
	130	g_free( req->request );
	131	g_free( req );
	132
	133	return;
	134	}
	135
	136	static void http_ssl_connected( gpointer data, void *source, GaimInputCondition cond )
	137	{
	138	struct http_request *req = data;
	139
	140	if( source == NULL )
	141	return http_connected( data, -1, cond );
	142
	143	req->fd = ssl_getfd( source );
	144
	145	return http_connected( data, req->fd, cond );
	146	}
	147
	148	static void http_incoming_data( gpointer data, int source, GaimInputCondition cond )
	149	{
	150	struct http_request *req = data;
	151	int evil_server = 0;
	152	char buffer[2048];
	153	char end1, end2;
	154	int st;
	155
	156	if( req->inpa > 0 )
	157	gaim_input_remove( req->inpa );
	158
	159	if( req->ssl )
	160	{
	161	st = ssl_read( req->ssl, buffer, sizeof( buffer ) );
	162	if( st < 0 )
	163	{
	164	if( ssl_errno != SSL_AGAIN )
	165	{
[ad8b8a3]	166	/* goto cleanup; */
	167
	168	/* YAY! We have to deal with crappy Microsoft
	169	servers that LOVE to send invalid TLS
	170	packets that abort connections! \o/ */
	171
	172	goto got_reply;
[8a9afe4]	173	}
	174	}
	175	else if( st == 0 )
	176	{
	177	goto got_reply;
	178	}
	179	}
	180	else
	181	{
	182	st = read( req->fd, buffer, sizeof( buffer ) );
	183	if( st < 0 )
	184	{
	185	if( !sockerr_again() )
	186	{
	187	goto cleanup;
	188	}
	189	}
	190	else if( st == 0 )
	191	{
	192	goto got_reply;
	193	}
	194	}
	195
	196	if( st > 0 )
	197	{
	198	req->reply_headers = g_realloc( req->reply_headers, req->bytes_read + st + 1 );
	199	memcpy( req->reply_headers + req->bytes_read, buffer, st );
[52b3a99]	200	req->bytes_read += st;
[8a9afe4]	201	}
	202
	203	/* There will be more! */
	204	req->inpa = gaim_input_add( req->fd,
	205	req->ssl ? ssl_getdirection( req->ssl ) : GAIM_INPUT_READ,
	206	http_incoming_data, req );
	207
	208	return;
	209
	210	got_reply:
	211	/* Zero termination is very convenient. */
	212	req->reply_headers[req->bytes_read] = 0;
	213
	214	/* Find the separation between headers and body, and keep stupid
	215	webservers in mind. */
	216	end1 = strstr( req->reply_headers, "\r\n\r\n" );
	217	end2 = strstr( req->reply_headers, "\n\n" );
	218
	219	if( end2 && end2 < end1 )
	220	{
[52b3a99]	221	end1 = end2 + 1;
[8a9afe4]	222	evil_server = 1;
	223	}
[52b3a99]	224	else
	225	{
	226	end1 += 2;
	227	}
[8a9afe4]	228
	229	if( end1 )
	230	{
	231	*end1 = 0;
	232
	233	if( evil_server )
[52b3a99]	234	req->reply_body = end1 + 1;
	235	else
[8a9afe4]	236	req->reply_body = end1 + 2;
[52b3a99]	237	}
	238
	239	if( ( end1 = strchr( req->reply_headers, ' ' ) ) != NULL )
	240	{
	241	if( sscanf( end1 + 1, "%d", &req->status_code ) != 1 )
	242	req->status_code = -1;
	243	}
	244	else
	245	{
	246	req->status_code = -1;
	247	}
	248
	249	if( req->status_code == 301 \|\| req->status_code == 302 )
	250	{
	251	char loc, new_request, *new_host;
	252	int error = 0, new_port, new_proto;
	253
	254	loc = strstr( req->reply_headers, "\nLocation: " );
	255	if( loc == NULL ) /* We can't handle this redirect... */
	256	goto cleanup;
	257
	258	loc += 11;
	259	while( *loc == ' ' )
	260	loc ++;
	261
	262	/* TODO/FIXME: Possibly have to handle relative redirections,
	263	and rewrite Host: headers. Not necessary for now, it's
	264	enough for passport authentication like this. */
	265
	266	if( *loc == '/' )
	267	{
	268	/* Just a different pathname... */
	269
	270	/* Since we don't cache the servername, and since we
	271	don't need this yet anyway, I won't implement it. */
	272
	273	goto cleanup;
	274	}
[8a9afe4]	275	else
[52b3a99]	276	{
	277	/* A whole URL */
	278	url_t *url;
	279	char *s;
	280
	281	s = strstr( loc, "\r\n" );
	282	if( s == NULL )
	283	goto cleanup;
	284
	285	url = g_new0( url_t, 1 );
	286	*s = 0;
	287
	288	if( !url_set( url, loc ) )
	289	{
	290	g_free( url );
	291	goto cleanup;
	292	}
	293
	294	/* Okay, this isn't fun! We have to rebuild the request... :-( */
	295	new_request = g_malloc( req->request_length + strlen( url->file ) );
	296
	297	/* So, now I just allocated enough memory, so I'm
	298	going to use strcat(), whether you like it or not. :-) */
	299
	300	/* First, find the GET/POST/whatever from the original request. */
	301	s = strchr( req->request, ' ' );
	302	if( s == NULL )
	303	{
	304	g_free( new_request );
	305	g_free( url );
	306	goto cleanup;
	307	}
	308
	309	*s = 0;
	310	sprintf( new_request, "%s %s HTTP/1.0\r\n", req->request, url->file );
	311	*s = ' ';
	312
	313	s = strstr( req->request, "\r\n" );
	314	if( s == NULL )
	315	{
	316	g_free( new_request );
	317	g_free( url );
	318	goto cleanup;
	319	}
	320
	321	strcat( new_request, s + 2 );
	322	new_host = g_strdup( url->host );
	323	new_port = url->port;
	324	new_proto = url->proto;
	325
	326	g_free( url );
	327	}
	328
	329	if( req->ssl )
	330	ssl_disconnect( req->ssl );
	331	else
	332	closesocket( req->fd );
	333
	334	req->fd = -1;
	335	req->ssl = 0;
	336
	337	if( new_proto == PROTO_HTTPS )
	338	{
	339	req->ssl = ssl_connect( new_host, new_port, http_ssl_connected, req );
	340	if( req->ssl == NULL )
	341	error = 1;
	342	}
	343	else
	344	{
	345	req->fd = proxy_connect( new_host, new_port, http_connected, req );
	346	if( req->fd < 0 )
	347	error = 1;
	348	}
[2db811a]	349	g_free( new_host );
[52b3a99]	350
	351	if( error )
	352	{
	353	g_free( new_request );
	354	goto cleanup;
	355	}
	356
	357	g_free( req->request );
	358	g_free( req->reply_headers );
	359	req->request = new_request;
	360	req->request_length = strlen( new_request );
	361	req->bytes_read = req->bytes_written = req->inpa = 0;
	362	req->reply_headers = req->reply_body = NULL;
	363
	364	return;
[8a9afe4]	365	}
	366
	367	/* Assume that a closed connection means we're finished, this indeed
	368	breaks with keep-alive connections and faulty connections. */
	369	req->finished = 1;
	370
	371	cleanup:
	372	if( req->ssl )
	373	ssl_disconnect( req->ssl );
	374	else
[52b3a99]	375	closesocket( req->fd );
[8a9afe4]	376
	377	req->func( req );
	378
	379	g_free( req->request );
	380	g_free( req->reply_headers );
	381	g_free( req );
	382	}

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