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source: protocols/yahoo/yahoo_httplib.c @ de26f3c

Last change on this file since de26f3c was 9034ba0, checked in by Wilmer van der Gaast <wilmer@…>, at 2010-07-24T10:57:08Z
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1	/*
2	* libyahoo2: yahoo_httplib.c
3	*
4	* Copyright (C) 2002-2004, Philip S Tellis <philip.tellis AT gmx.net>
5	*
6	* This program is free software; you can redistribute it and/or modify
7	* it under the terms of the GNU General Public License as published by
8	* the Free Software Foundation; either version 2 of the License, or
9	* (at your option) any later version.
10	*
11	* This program is distributed in the hope that it will be useful,
12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14	* GNU General Public License for more details.
15	*
16	* You should have received a copy of the GNU General Public License
17	* along with this program; if not, write to the Free Software
18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
19	*
20	*/
21
22	#include <stdio.h>
23	#include <stdlib.h>
24
25	#if STDC_HEADERS
26	# include <string.h>
27	#else
28	# if !HAVE_STRCHR
29	# define strchr index
30	# define strrchr rindex
31	# endif
32	char strchr(), strrchr();
33	# if !HAVE_MEMCPY
34	# define memcpy(d, s, n) bcopy ((s), (d), (n))
35	# define memmove(d, s, n) bcopy ((s), (d), (n))
36	# endif
37	#endif
38
39	#include <errno.h>
40	#ifndef _WIN32
41	#include <unistd.h>
42	#endif
43	#include <ctype.h>
44	#include "yahoo2.h"
45	#include "yahoo2_callbacks.h"
46	#include "yahoo_httplib.h"
47	#include "yahoo_util.h"
48
49	#include "yahoo_debug.h"
50	#ifdef __MINGW32__
51	# include <winsock2.h>
52	# define snprintf _snprintf
53	#endif
54
55	#ifdef USE_STRUCT_CALLBACKS
56	extern struct yahoo_callbacks *yc;
57	#define YAHOO_CALLBACK(x) yc->x
58	#else
59	#define YAHOO_CALLBACK(x) x
60	#endif
61
62	extern enum yahoo_log_level log_level;
63
64	int yahoo_tcp_readline(char ptr, int maxlen, void fd)
65	{
66	int n, rc;
67	char c;
68
69	for (n = 1; n < maxlen; n++) {
70
71	do {
72	rc = YAHOO_CALLBACK(ext_yahoo_read) (fd, &c, 1);
73	} while (rc == -1 && (errno == EINTR \|\| errno == EAGAIN)); /* this is bad - it should be done asynchronously */
74
75	if (rc == 1) {
76	if (c == '\r') /* get rid of \r */
77	continue;
78	*ptr = c;
79	if (c == '\n')
80	break;
81	ptr++;
82	} else if (rc == 0) {
83	if (n == 1)
84	return (0); /* EOF, no data */
85	else
86	break; /* EOF, w/ data */
87	} else {
88	return -1;
89	}
90	}
91
92	*ptr = 0;
93	return (n);
94	}
95
96	static int url_to_host_port_path(const char *url,
97	char host, int port, char path, int ssl)
98	{
99	char *urlcopy = NULL;
100	char *slash = NULL;
101	char *colon = NULL;
102
103	/*
104	* http://hostname
105	* http://hostname/
106	* http://hostname/path
107	* http://hostname/path:foo
108	* http://hostname:port
109	* http://hostname:port/
110	* http://hostname:port/path
111	* http://hostname:port/path:foo
112	* and https:// variants of the above
113	*/
114
115	if (strstr(url, "http://") == url) {
116	urlcopy = strdup(url + 7);
117	} else if (strstr(url, "https://") == url) {
118	urlcopy = strdup(url + 8);
119	*ssl = 1;
120	} else {
121	WARNING(("Weird url - unknown protocol: %s", url));
122	return 0;
123	}
124
125	slash = strchr(urlcopy, '/');
126	colon = strchr(urlcopy, ':');
127
128	if (!colon \|\| (slash && slash < colon)) {
129	if (*ssl)
130	*port = 443;
131	else
132	*port = 80;
133	} else {
134	*colon = 0;
135	*port = atoi(colon + 1);
136	}
137
138	if (!slash) {
139	strcpy(path, "/");
140	} else {
141	strcpy(path, slash);
142	*slash = 0;
143	}
144
145	strcpy(host, urlcopy);
146
147	FREE(urlcopy);
148
149	return 1;
150	}
151
152	static int isurlchar(unsigned char c)
153	{
154	return (isalnum(c));
155	}
156
157	char yahoo_urlencode(const char instr)
158	{
159	int ipos = 0, bpos = 0;
160	char *str = NULL;
161	int len = strlen(instr);
162
163	if (!(str = y_new(char, 3 *len + 1)))
164	return "";
165
166	while (instr[ipos]) {
167	while (isurlchar(instr[ipos]))
168	str[bpos++] = instr[ipos++];
169	if (!instr[ipos])
170	break;
171
172	snprintf(&str[bpos], 4, "%%%02x", instr[ipos] & 0xff);
173	bpos += 3;
174	ipos++;
175	}
176	str[bpos] = '\0';
177
178	/* free extra alloc'ed mem. */
179	len = strlen(str);
180	str = y_renew(char, str, len + 1);
181
182	return (str);
183	}
184
185	char yahoo_urldecode(const char instr)
186	{
187	int ipos = 0, bpos = 0;
188	char *str = NULL;
189	char entity[3] = { 0, 0, 0 };
190	unsigned dec;
191	int len = strlen(instr);
192
193	if (!(str = y_new(char, len + 1)))
194	return "";
195
196	while (instr[ipos]) {
197	while (instr[ipos] && instr[ipos] != '%')
198	if (instr[ipos] == '+') {
199	str[bpos++] = ' ';
200	ipos++;
201	} else
202	str[bpos++] = instr[ipos++];
203	if (!instr[ipos])
204	break;
205
206	if (instr[ipos + 1] && instr[ipos + 2]) {
207	ipos++;
208	entity[0] = instr[ipos++];
209	entity[1] = instr[ipos++];
210	sscanf(entity, "%2x", &dec);
211	str[bpos++] = (char)dec;
212	} else {
213	str[bpos++] = instr[ipos++];
214	}
215	}
216	str[bpos] = '\0';
217
218	/* free extra alloc'ed mem. */
219	len = strlen(str);
220	str = y_renew(char, str, len + 1);
221
222	return (str);
223	}
224
225	char yahoo_xmldecode(const char instr)
226	{
227	int ipos = 0, bpos = 0, epos = 0;
228	char *str = NULL;
229	char entity[4] = { 0, 0, 0, 0 };
230	char *entitymap[5][2] = {
231	{"amp;", "&"},
232	{"quot;", "\""},
233	{"lt;", "<"},
234	{"gt;", "<"},
235	{"nbsp;", " "}
236	};
237	unsigned dec;
238	int len = strlen(instr);
239
240	if (!(str = y_new(char, len + 1)))
241	return "";
242
243	while (instr[ipos]) {
244	while (instr[ipos] && instr[ipos] != '&')
245	if (instr[ipos] == '+') {
246	str[bpos++] = ' ';
247	ipos++;
248	} else
249	str[bpos++] = instr[ipos++];
250	if (!instr[ipos] \|\| !instr[ipos + 1])
251	break;
252	ipos++;
253
254	if (instr[ipos] == '#') {
255	ipos++;
256	epos = 0;
257	while (instr[ipos] != ';')
258	entity[epos++] = instr[ipos++];
259	sscanf(entity, "%u", &dec);
260	str[bpos++] = (char)dec;
261	ipos++;
262	} else {
263	int i;
264	for (i = 0; i < 5; i++)
265	if (!strncmp(instr + ipos, entitymap[i][0],
266	strlen(entitymap[i][0]))) {
267	str[bpos++] = entitymap[i][1][0];
268	ipos += strlen(entitymap[i][0]);
269	break;
270	}
271	}
272	}
273	str[bpos] = '\0';
274
275	/* free extra alloc'ed mem. */
276	len = strlen(str);
277	str = y_renew(char, str, len + 1);
278
279	return (str);
280	}
281
282	typedef void (http_connected) (int id, void fd, int error);
283
284	struct callback_data {
285	int id;
286	yahoo_get_fd_callback callback;
287	char *request;
288	void *user_data;
289	};
290
291	static void connect_complete(void fd, int error, void data)
292	{
293	struct callback_data *ccd = data;
294	if (error == 0)
295	YAHOO_CALLBACK(ext_yahoo_write) (fd, ccd->request,
296	strlen(ccd->request));
297	free(ccd->request);
298	ccd->callback(ccd->id, fd, error, ccd->user_data);
299	FREE(ccd);
300	}
301
302	static void yahoo_send_http_request(int id, char host, int port, char request,
303	yahoo_get_fd_callback callback, void *data, int use_ssl)
304	{
305	struct callback_data *ccd = y_new0(struct callback_data, 1);
306	ccd->callback = callback;
307	ccd->id = id;
308	ccd->request = strdup(request);
309	ccd->user_data = data;
310
311	YAHOO_CALLBACK(ext_yahoo_connect_async) (id, host, port,
312	connect_complete, ccd, use_ssl);
313	}
314
315	void yahoo_http_post(int id, const char url, const char cookies,
316	long content_length, yahoo_get_fd_callback callback, void *data)
317	{
318	char host[255];
319	int port = 80;
320	char path[255];
321	char buff[1024];
322	int ssl = 0;
323
324	if (!url_to_host_port_path(url, host, &port, path, &ssl))
325	return;
326
327	/* thanks to kopete dumpcap */
328	snprintf(buff, sizeof(buff),
329	"POST %s HTTP/1.1\r\n"
330	"Cookie: %s\r\n"
331	"User-Agent: Mozilla/5.0\r\n"
332	"Host: %s\r\n"
333	"Content-Length: %ld\r\n"
334	"Cache-Control: no-cache\r\n"
335	"\r\n", path, cookies, host, content_length);
336
337	yahoo_send_http_request(id, host, port, buff, callback, data, ssl);
338	}
339
340	void yahoo_http_get(int id, const char url, const char cookies, int http11,
341	int keepalive, yahoo_get_fd_callback callback, void *data)
342	{
343	char host[255];
344	int port = 80;
345	char path[255];
346	char buff[2048];
347	char cookiebuff[1024];
348	int ssl = 0;
349
350	if (!url_to_host_port_path(url, host, &port, path, &ssl))
351	return;
352
353	/* Allow cases when we don't need to send a cookie */
354	if (cookies)
355	snprintf(cookiebuff, sizeof(cookiebuff), "Cookie: %s\r\n",
356	cookies);
357	else
358	cookiebuff[0] = '\0';
359
360	snprintf(buff, sizeof(buff),
361	"GET %s HTTP/1.%s\r\n"
362	"%sHost: %s\r\n"
363	"User-Agent: Mozilla/4.5 [en] (" PACKAGE "/" VERSION ")\r\n"
364	"Accept: /\r\n"
365	"%s" "\r\n", path, http11?"1":"0", cookiebuff, host,
366	keepalive? "Connection: Keep-Alive\r\n":"Connection: close\r\n");
367
368	yahoo_send_http_request(id, host, port, buff, callback, data, ssl);
369	}
370
371	void yahoo_http_head(int id, const char url, const char cookies, int len,
372	char payload, yahoo_get_fd_callback callback, void data)
373	{
374	char host[255];
375	int port = 80;
376	char path[255];
377	char buff[2048];
378	char cookiebuff[1024];
379	int ssl = 0;
380
381	if (!url_to_host_port_path(url, host, &port, path, &ssl))
382	return;
383
384	/* Allow cases when we don't need to send a cookie */
385	if (cookies)
386	snprintf(cookiebuff, sizeof(cookiebuff), "Cookie: %s\r\n",
387	cookies);
388	else
389	cookiebuff[0] = '\0';
390
391	snprintf(buff, sizeof(buff),
392	"HEAD %s HTTP/1.0\r\n"
393	"Accept: /\r\n"
394	"Host: %s:%d\r\n"
395	"User-Agent: Mozilla/4.5 [en] (" PACKAGE "/" VERSION ")\r\n"
396	"%s"
397	"Content-Length: %d\r\n"
398	"Cache-Control: no-cache\r\n"
399	"\r\n%s", path, host, port, cookiebuff, len,
400	payload?payload:"");
401
402	yahoo_send_http_request(id, host, port, buff, callback, data, ssl);
403	}
404

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