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
24 #include "os_support.h"
29 /* XXX: POST protocol is not completely implemented because ffmpeg uses
30 only a subset of it. */
34 /* used for protocol handling */
35 #define BUFFER_SIZE 1024
37 #define MAX_REDIRECTS 8
41 unsigned char buffer[BUFFER_SIZE], *buf_ptr, *buf_end;
44 offset_t off, filesize;
45 char location[URL_SIZE];
48 static int http_connect(URLContext *h, const char *path, const char *hoststr,
49 const char *auth, int *new_location);
50 static int http_write(URLContext *h, uint8_t *buf, int size);
53 /* return non zero if error */
54 static int http_open_cnx(URLContext *h)
56 const char *path, *proxy_path;
57 char hostname[1024], hoststr[1024];
61 int port, use_proxy, err, location_changed = 0, redirects = 0;
62 HTTPContext *s = h->priv_data;
63 URLContext *hd = NULL;
65 proxy_path = getenv("http_proxy");
66 use_proxy = (proxy_path != NULL) && !getenv("no_proxy") &&
67 av_strstart(proxy_path, "http://", NULL);
69 /* fill the dest addr */
71 /* needed in any case to build the host string */
72 url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
73 path1, sizeof(path1), s->location);
75 snprintf(hoststr, sizeof(hoststr), "%s:%d", hostname, port);
77 av_strlcpy(hoststr, hostname, sizeof(hoststr));
81 url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
93 snprintf(buf, sizeof(buf), "tcp://%s:%d", hostname, port);
94 err = url_open(&hd, buf, URL_RDWR);
99 if (http_connect(h, path, hoststr, auth, &location_changed) < 0)
101 if ((s->http_code == 302 || s->http_code == 303) && location_changed == 1) {
102 /* url moved, get next */
104 if (redirects++ >= MAX_REDIRECTS)
106 location_changed = 0;
116 static int http_open(URLContext *h, const char *uri, int flags)
123 s = av_malloc(sizeof(HTTPContext));
125 return AVERROR(ENOMEM);
130 av_strlcpy(s->location, uri, URL_SIZE);
132 ret = http_open_cnx(h);
137 static int http_getc(HTTPContext *s)
140 if (s->buf_ptr >= s->buf_end) {
141 len = url_read(s->hd, s->buffer, BUFFER_SIZE);
144 } else if (len == 0) {
147 s->buf_ptr = s->buffer;
148 s->buf_end = s->buffer + len;
151 return *s->buf_ptr++;
154 static int process_line(URLContext *h, char *line, int line_count,
157 HTTPContext *s = h->priv_data;
165 if (line_count == 0) {
166 while (!isspace(*p) && *p != '\0')
170 s->http_code = strtol(p, NULL, 10);
172 printf("http_code=%d\n", s->http_code);
174 /* error codes are 4xx and 5xx */
175 if (s->http_code >= 400 && s->http_code < 600)
178 while (*p != '\0' && *p != ':')
188 if (!strcmp(tag, "Location")) {
189 strcpy(s->location, p);
191 } else if (!strcmp (tag, "Content-Length") && s->filesize == -1) {
192 s->filesize = atoll(p);
193 } else if (!strcmp (tag, "Content-Range")) {
194 /* "bytes $from-$to/$document_size" */
196 if (!strncmp (p, "bytes ", 6)) {
199 if ((slash = strchr(p, '/')) && strlen(slash) > 0)
200 s->filesize = atoll(slash+1);
202 h->is_streamed = 0; /* we _can_ in fact seek */
208 static int http_connect(URLContext *h, const char *path, const char *hoststr,
209 const char *auth, int *new_location)
211 HTTPContext *s = h->priv_data;
215 int auth_b64_len = strlen(auth)* 4 / 3 + 12;
216 offset_t off = s->off;
219 /* send http header */
220 post = h->flags & URL_WRONLY;
221 auth_b64 = av_malloc(auth_b64_len);
222 av_base64_encode(auth_b64, auth_b64_len, (uint8_t *)auth, strlen(auth));
223 snprintf(s->buffer, sizeof(s->buffer),
227 "Range: bytes=%"PRId64"-\r\n"
229 "Authorization: Basic %s\r\n"
230 "Connection: close\r\n"
232 post ? "POST" : "GET",
240 if (http_write(h, s->buffer, strlen(s->buffer)) < 0)
243 /* init input buffer */
244 s->buf_ptr = s->buffer;
245 s->buf_end = s->buffer;
254 /* wait for header */
262 if (q > line && q[-1] == '\r')
266 printf("header='%s'\n", line);
268 err = process_line(h, line, s->line_count, new_location);
276 if ((q - line) < sizeof(line) - 1)
281 return (off == s->off) ? 0 : -1;
285 static int http_read(URLContext *h, uint8_t *buf, int size)
287 HTTPContext *s = h->priv_data;
290 /* read bytes from input buffer first */
291 len = s->buf_end - s->buf_ptr;
295 memcpy(buf, s->buf_ptr, len);
298 len = url_read(s->hd, buf, size);
305 /* used only when posting data */
306 static int http_write(URLContext *h, uint8_t *buf, int size)
308 HTTPContext *s = h->priv_data;
309 return url_write(s->hd, buf, size);
312 static int http_close(URLContext *h)
314 HTTPContext *s = h->priv_data;
320 static offset_t http_seek(URLContext *h, offset_t off, int whence)
322 HTTPContext *s = h->priv_data;
323 URLContext *old_hd = s->hd;
324 offset_t old_off = s->off;
326 if (whence == AVSEEK_SIZE)
328 else if ((s->filesize == -1 && whence == SEEK_END) || h->is_streamed)
331 /* we save the old context in case the seek fails */
333 if (whence == SEEK_CUR)
335 else if (whence == SEEK_END)
339 /* if it fails, continue on old connection */
340 if (http_open_cnx(h) < 0) {
349 URLProtocol http_protocol = {