2 * HTTP protocol for ffmpeg client
3 * Copyright (c) 2000, 2001 Fabrice Bellard.
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
27 /* XXX: POST protocol is not completely implemented because ffmpeg uses
28 only a subset of it. */
32 /* used for protocol handling */
33 #define BUFFER_SIZE 1024
35 #define MAX_REDIRECTS 8
39 unsigned char buffer[BUFFER_SIZE], *buf_ptr, *buf_end;
42 offset_t off, filesize;
43 char location[URL_SIZE];
46 static int http_connect(URLContext *h, const char *path, const char *hoststr,
47 const char *auth, int *new_location);
48 static int http_write(URLContext *h, uint8_t *buf, int size);
51 /* return non zero if error */
52 static int http_open_cnx(URLContext *h)
54 const char *path, *proxy_path;
55 char hostname[1024], hoststr[1024];
59 int port, use_proxy, err, location_changed = 0, redirects = 0;
60 HTTPContext *s = h->priv_data;
61 URLContext *hd = NULL;
63 proxy_path = getenv("http_proxy");
64 use_proxy = (proxy_path != NULL) && !getenv("no_proxy") &&
65 strstart(proxy_path, "http://", NULL);
67 /* fill the dest addr */
69 /* needed in any case to build the host string */
70 url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
71 path1, sizeof(path1), s->location);
73 snprintf(hoststr, sizeof(hoststr), "%s:%d", hostname, port);
75 pstrcpy(hoststr, sizeof(hoststr), hostname);
79 url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
91 snprintf(buf, sizeof(buf), "tcp://%s:%d", hostname, port);
92 err = url_open(&hd, buf, URL_RDWR);
97 if (http_connect(h, path, hoststr, auth, &location_changed) < 0)
99 if ((s->http_code == 302 || s->http_code == 303) && location_changed == 1) {
100 /* url moved, get next */
102 if (redirects++ >= MAX_REDIRECTS)
104 location_changed = 0;
114 static int http_open(URLContext *h, const char *uri, int flags)
121 s = av_malloc(sizeof(HTTPContext));
123 return AVERROR(ENOMEM);
128 pstrcpy (s->location, URL_SIZE, uri);
130 ret = http_open_cnx(h);
135 static int http_getc(HTTPContext *s)
138 if (s->buf_ptr >= s->buf_end) {
139 len = url_read(s->hd, s->buffer, BUFFER_SIZE);
142 } else if (len == 0) {
145 s->buf_ptr = s->buffer;
146 s->buf_end = s->buffer + len;
149 return *s->buf_ptr++;
152 static int process_line(URLContext *h, char *line, int line_count,
155 HTTPContext *s = h->priv_data;
163 if (line_count == 0) {
164 while (!isspace(*p) && *p != '\0')
168 s->http_code = strtol(p, NULL, 10);
170 printf("http_code=%d\n", s->http_code);
172 /* error codes are 4xx and 5xx */
173 if (s->http_code >= 400 && s->http_code < 600)
176 while (*p != '\0' && *p != ':')
186 if (!strcmp(tag, "Location")) {
187 strcpy(s->location, p);
189 } else if (!strcmp (tag, "Content-Length") && s->filesize == -1) {
190 s->filesize = atoll(p);
191 } else if (!strcmp (tag, "Content-Range")) {
192 /* "bytes $from-$to/$document_size" */
194 if (!strncmp (p, "bytes ", 6)) {
197 if ((slash = strchr(p, '/')) && strlen(slash) > 0)
198 s->filesize = atoll(slash+1);
200 h->is_streamed = 0; /* we _can_ in fact seek */
206 static int http_connect(URLContext *h, const char *path, const char *hoststr,
207 const char *auth, int *new_location)
209 HTTPContext *s = h->priv_data;
213 int auth_b64_len = strlen(auth)* 4 / 3 + 12;
214 offset_t off = s->off;
217 /* send http header */
218 post = h->flags & URL_WRONLY;
219 auth_b64 = av_malloc(auth_b64_len);
220 av_base64_encode(auth_b64, auth_b64_len, (uint8_t *)auth, strlen(auth));
221 snprintf(s->buffer, sizeof(s->buffer),
225 "Range: bytes=%"PRId64"-\r\n"
227 "Authorization: Basic %s\r\n"
228 "Connection: close\r\n"
230 post ? "POST" : "GET",
238 if (http_write(h, s->buffer, strlen(s->buffer)) < 0)
241 /* init input buffer */
242 s->buf_ptr = s->buffer;
243 s->buf_end = s->buffer;
252 /* wait for header */
260 if (q > line && q[-1] == '\r')
264 printf("header='%s'\n", line);
266 err = process_line(h, line, s->line_count, new_location);
274 if ((q - line) < sizeof(line) - 1)
279 return (off == s->off) ? 0 : -1;
283 static int http_read(URLContext *h, uint8_t *buf, int size)
285 HTTPContext *s = h->priv_data;
288 /* read bytes from input buffer first */
289 len = s->buf_end - s->buf_ptr;
293 memcpy(buf, s->buf_ptr, len);
296 len = url_read(s->hd, buf, size);
303 /* used only when posting data */
304 static int http_write(URLContext *h, uint8_t *buf, int size)
306 HTTPContext *s = h->priv_data;
307 return url_write(s->hd, buf, size);
310 static int http_close(URLContext *h)
312 HTTPContext *s = h->priv_data;
318 static offset_t http_seek(URLContext *h, offset_t off, int whence)
320 HTTPContext *s = h->priv_data;
321 URLContext *old_hd = s->hd;
322 offset_t old_off = s->off;
324 if (whence == AVSEEK_SIZE)
326 else if ((s->filesize == -1 && whence == SEEK_END) || h->is_streamed)
329 /* we save the old context in case the seek fails */
331 if (whence == SEEK_CUR)
333 else if (whence == SEEK_END)
337 /* if it fails, continue on old connection */
338 if (http_open_cnx(h) < 0) {
347 URLProtocol http_protocol = {