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
28 /* XXX: POST protocol is not completely implemented because ffmpeg uses
29 only a subset of it. */
33 /* used for protocol handling */
34 #define BUFFER_SIZE 1024
36 #define MAX_REDIRECTS 8
40 unsigned char buffer[BUFFER_SIZE], *buf_ptr, *buf_end;
43 offset_t off, filesize;
44 char location[URL_SIZE];
47 static int http_connect(URLContext *h, const char *path, const char *hoststr,
48 const char *auth, int *new_location);
49 static int http_write(URLContext *h, uint8_t *buf, int size);
52 /* return non zero if error */
53 static int http_open_cnx(URLContext *h)
55 const char *path, *proxy_path;
56 char hostname[1024], hoststr[1024];
60 int port, use_proxy, err, location_changed = 0, redirects = 0;
61 HTTPContext *s = h->priv_data;
62 URLContext *hd = NULL;
64 proxy_path = getenv("http_proxy");
65 use_proxy = (proxy_path != NULL) && !getenv("no_proxy") &&
66 av_strstart(proxy_path, "http://", NULL);
68 /* fill the dest addr */
70 /* needed in any case to build the host string */
71 url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
72 path1, sizeof(path1), s->location);
74 snprintf(hoststr, sizeof(hoststr), "%s:%d", hostname, port);
76 av_strlcpy(hoststr, hostname, sizeof(hoststr));
80 url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
92 snprintf(buf, sizeof(buf), "tcp://%s:%d", hostname, port);
93 err = url_open(&hd, buf, URL_RDWR);
98 if (http_connect(h, path, hoststr, auth, &location_changed) < 0)
100 if ((s->http_code == 302 || s->http_code == 303) && location_changed == 1) {
101 /* url moved, get next */
103 if (redirects++ >= MAX_REDIRECTS)
105 location_changed = 0;
115 static int http_open(URLContext *h, const char *uri, int flags)
122 s = av_malloc(sizeof(HTTPContext));
124 return AVERROR(ENOMEM);
129 av_strlcpy(s->location, uri, URL_SIZE);
131 ret = http_open_cnx(h);
136 static int http_getc(HTTPContext *s)
139 if (s->buf_ptr >= s->buf_end) {
140 len = url_read(s->hd, s->buffer, BUFFER_SIZE);
143 } else if (len == 0) {
146 s->buf_ptr = s->buffer;
147 s->buf_end = s->buffer + len;
150 return *s->buf_ptr++;
153 static int process_line(URLContext *h, char *line, int line_count,
156 HTTPContext *s = h->priv_data;
164 if (line_count == 0) {
165 while (!isspace(*p) && *p != '\0')
169 s->http_code = strtol(p, NULL, 10);
171 printf("http_code=%d\n", s->http_code);
173 /* error codes are 4xx and 5xx */
174 if (s->http_code >= 400 && s->http_code < 600)
177 while (*p != '\0' && *p != ':')
187 if (!strcmp(tag, "Location")) {
188 strcpy(s->location, p);
190 } else if (!strcmp (tag, "Content-Length") && s->filesize == -1) {
191 s->filesize = atoll(p);
192 } else if (!strcmp (tag, "Content-Range")) {
193 /* "bytes $from-$to/$document_size" */
195 if (!strncmp (p, "bytes ", 6)) {
198 if ((slash = strchr(p, '/')) && strlen(slash) > 0)
199 s->filesize = atoll(slash+1);
201 h->is_streamed = 0; /* we _can_ in fact seek */
207 static int http_connect(URLContext *h, const char *path, const char *hoststr,
208 const char *auth, int *new_location)
210 HTTPContext *s = h->priv_data;
214 int auth_b64_len = strlen(auth)* 4 / 3 + 12;
215 offset_t off = s->off;
218 /* send http header */
219 post = h->flags & URL_WRONLY;
220 auth_b64 = av_malloc(auth_b64_len);
221 av_base64_encode(auth_b64, auth_b64_len, (uint8_t *)auth, strlen(auth));
222 snprintf(s->buffer, sizeof(s->buffer),
226 "Range: bytes=%"PRId64"-\r\n"
228 "Authorization: Basic %s\r\n"
229 "Connection: close\r\n"
231 post ? "POST" : "GET",
239 if (http_write(h, s->buffer, strlen(s->buffer)) < 0)
242 /* init input buffer */
243 s->buf_ptr = s->buffer;
244 s->buf_end = s->buffer;
253 /* wait for header */
261 if (q > line && q[-1] == '\r')
265 printf("header='%s'\n", line);
267 err = process_line(h, line, s->line_count, new_location);
275 if ((q - line) < sizeof(line) - 1)
280 return (off == s->off) ? 0 : -1;
284 static int http_read(URLContext *h, uint8_t *buf, int size)
286 HTTPContext *s = h->priv_data;
289 /* read bytes from input buffer first */
290 len = s->buf_end - s->buf_ptr;
294 memcpy(buf, s->buf_ptr, len);
297 len = url_read(s->hd, buf, size);
304 /* used only when posting data */
305 static int http_write(URLContext *h, uint8_t *buf, int size)
307 HTTPContext *s = h->priv_data;
308 return url_write(s->hd, buf, size);
311 static int http_close(URLContext *h)
313 HTTPContext *s = h->priv_data;
319 static offset_t http_seek(URLContext *h, offset_t off, int whence)
321 HTTPContext *s = h->priv_data;
322 URLContext *old_hd = s->hd;
323 offset_t old_off = s->off;
325 if (whence == AVSEEK_SIZE)
327 else if ((s->filesize == -1 && whence == SEEK_END) || h->is_streamed)
330 /* we save the old context in case the seek fails */
332 if (whence == SEEK_CUR)
334 else if (whence == SEEK_END)
338 /* if it fails, continue on old connection */
339 if (http_open_cnx(h) < 0) {
348 URLProtocol http_protocol = {