* HTTP protocol for ffmpeg client
* Copyright (c) 2000, 2001 Fabrice Bellard.
*
- * This library is free software; you can redistribute it and/or
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
+
+#include "libavutil/base64.h"
+#include "libavutil/avstring.h"
#include "avformat.h"
#include <unistd.h>
-#include <ctype.h>
-#include <sys/types.h>
-#include <sys/socket.h>
-#include <netinet/in.h>
-#ifndef __BEOS__
-# include <arpa/inet.h>
-#else
-# include "barpainet.h"
-#endif
-#include <netdb.h>
-
+#include "network.h"
+#include "os_support.h"
-/* XXX: POST protocol is not completly implemented because ffmpeg use
- only a subset of it */
+/* XXX: POST protocol is not completely implemented because ffmpeg uses
+ only a subset of it. */
//#define DEBUG
/* used for protocol handling */
#define BUFFER_SIZE 1024
#define URL_SIZE 4096
+#define MAX_REDIRECTS 8
typedef struct {
URLContext *hd;
unsigned char buffer[BUFFER_SIZE], *buf_ptr, *buf_end;
int line_count;
int http_code;
+ offset_t off, filesize;
char location[URL_SIZE];
} HTTPContext;
-static int http_connect(URLContext *h, const char *path, const char *hoststr);
+static int http_connect(URLContext *h, const char *path, const char *hoststr,
+ const char *auth, int *new_location);
static int http_write(URLContext *h, uint8_t *buf, int size);
/* return non zero if error */
-static int http_open(URLContext *h, const char *uri, int flags)
+static int http_open_cnx(URLContext *h)
{
const char *path, *proxy_path;
char hostname[1024], hoststr[1024];
+ char auth[1024];
char path1[1024];
char buf[1024];
- int port, use_proxy, err;
- HTTPContext *s;
+ int port, use_proxy, err, location_changed = 0, redirects = 0;
+ HTTPContext *s = h->priv_data;
URLContext *hd = NULL;
- h->is_streamed = 1;
-
- s = av_malloc(sizeof(HTTPContext));
- if (!s) {
- return -ENOMEM;
- }
- h->priv_data = s;
-
proxy_path = getenv("http_proxy");
- use_proxy = (proxy_path != NULL) && !getenv("no_proxy") &&
- strstart(proxy_path, "http://", NULL);
+ use_proxy = (proxy_path != NULL) && !getenv("no_proxy") &&
+ av_strstart(proxy_path, "http://", NULL);
/* fill the dest addr */
redo:
/* needed in any case to build the host string */
- url_split(NULL, 0, hostname, sizeof(hostname), &port,
- path1, sizeof(path1), uri);
+ url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
+ path1, sizeof(path1), s->location);
if (port > 0) {
snprintf(hoststr, sizeof(hoststr), "%s:%d", hostname, port);
} else {
- pstrcpy(hoststr, sizeof(hoststr), hostname);
+ av_strlcpy(hoststr, hostname, sizeof(hoststr));
}
if (use_proxy) {
- url_split(NULL, 0, hostname, sizeof(hostname), &port,
+ url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
NULL, 0, proxy_path);
- path = uri;
+ path = s->location;
} else {
if (path1[0] == '\0')
path = "/";
goto fail;
s->hd = hd;
- if (http_connect(h, path, hoststr) < 0)
+ if (http_connect(h, path, hoststr, auth, &location_changed) < 0)
goto fail;
- if (s->http_code == 303 && s->location[0] != '\0') {
+ if ((s->http_code == 302 || s->http_code == 303) && location_changed == 1) {
/* url moved, get next */
- uri = s->location;
url_close(hd);
+ if (redirects++ >= MAX_REDIRECTS)
+ return AVERROR(EIO);
+ location_changed = 0;
goto redo;
}
return 0;
fail:
if (hd)
url_close(hd);
- av_free(s);
- return -EIO;
+ return AVERROR(EIO);
}
+static int http_open(URLContext *h, const char *uri, int flags)
+{
+ HTTPContext *s;
+ int ret;
+
+ h->is_streamed = 1;
+
+ s = av_malloc(sizeof(HTTPContext));
+ if (!s) {
+ return AVERROR(ENOMEM);
+ }
+ h->priv_data = s;
+ s->filesize = -1;
+ s->off = 0;
+ av_strlcpy(s->location, uri, URL_SIZE);
+
+ ret = http_open_cnx(h);
+ if (ret != 0)
+ av_free (s);
+ return ret;
+}
static int http_getc(HTTPContext *s)
{
int len;
if (s->buf_ptr >= s->buf_end) {
len = url_read(s->hd, s->buffer, BUFFER_SIZE);
if (len < 0) {
- return -EIO;
+ return AVERROR(EIO);
} else if (len == 0) {
return -1;
} else {
return *s->buf_ptr++;
}
-static int process_line(HTTPContext *s, char *line, int line_count)
+static int process_line(URLContext *h, char *line, int line_count,
+ int *new_location)
{
+ HTTPContext *s = h->priv_data;
char *tag, *p;
-
+
/* end of header */
if (line[0] == '\0')
return 0;
#ifdef DEBUG
printf("http_code=%d\n", s->http_code);
#endif
+ /* error codes are 4xx and 5xx */
+ if (s->http_code >= 400 && s->http_code < 600)
+ return -1;
} else {
while (*p != '\0' && *p != ':')
p++;
- if (*p != ':')
+ if (*p != ':')
return 1;
-
+
*p = '\0';
tag = line;
p++;
p++;
if (!strcmp(tag, "Location")) {
strcpy(s->location, p);
+ *new_location = 1;
+ } else if (!strcmp (tag, "Content-Length") && s->filesize == -1) {
+ s->filesize = atoll(p);
+ } else if (!strcmp (tag, "Content-Range")) {
+ /* "bytes $from-$to/$document_size" */
+ const char *slash;
+ if (!strncmp (p, "bytes ", 6)) {
+ p += 6;
+ s->off = atoll(p);
+ if ((slash = strchr(p, '/')) && strlen(slash) > 0)
+ s->filesize = atoll(slash+1);
+ }
+ h->is_streamed = 0; /* we _can_ in fact seek */
}
}
return 1;
}
-static int http_connect(URLContext *h, const char *path, const char *hoststr)
+static int http_connect(URLContext *h, const char *path, const char *hoststr,
+ const char *auth, int *new_location)
{
HTTPContext *s = h->priv_data;
int post, err, ch;
char line[1024], *q;
+ char *auth_b64;
+ int auth_b64_len = strlen(auth)* 4 / 3 + 12;
+ offset_t off = s->off;
/* send http header */
post = h->flags & URL_WRONLY;
-
+ auth_b64 = av_malloc(auth_b64_len);
+ av_base64_encode(auth_b64, auth_b64_len, auth, strlen(auth));
snprintf(s->buffer, sizeof(s->buffer),
- "%s %s HTTP/1.0\n"
- "User-Agent: FFmpeg %s\n"
- "Accept: */*\n"
- "Host: %s\n"
- "\n",
+ "%s %s HTTP/1.1\r\n"
+ "User-Agent: %s\r\n"
+ "Accept: */*\r\n"
+ "Range: bytes=%"PRId64"-\r\n"
+ "Host: %s\r\n"
+ "Authorization: Basic %s\r\n"
+ "Connection: close\r\n"
+ "\r\n",
post ? "POST" : "GET",
path,
- LIBAVFORMAT_VERSION,
- hoststr);
-
+ LIBAVFORMAT_IDENT,
+ s->off,
+ hoststr,
+ auth_b64);
+
+ av_freep(&auth_b64);
if (http_write(h, s->buffer, strlen(s->buffer)) < 0)
- return -EIO;
-
+ return AVERROR(EIO);
+
/* init input buffer */
s->buf_ptr = s->buffer;
s->buf_end = s->buffer;
s->line_count = 0;
- s->location[0] = '\0';
+ s->off = 0;
+ s->filesize = -1;
if (post) {
- sleep(1);
return 0;
}
-
+
/* wait for header */
q = line;
for(;;) {
ch = http_getc(s);
if (ch < 0)
- return -EIO;
+ return AVERROR(EIO);
if (ch == '\n') {
/* process line */
if (q > line && q[-1] == '\r')
#ifdef DEBUG
printf("header='%s'\n", line);
#endif
- err = process_line(s, line, s->line_count);
+ err = process_line(h, line, s->line_count, new_location);
if (err < 0)
return err;
if (err == 0)
- return 0;
+ break;
s->line_count++;
q = line;
} else {
*q++ = ch;
}
}
+
+ return (off == s->off) ? 0 : -1;
}
static int http_read(URLContext *h, uint8_t *buf, int size)
{
HTTPContext *s = h->priv_data;
- int size1, len;
-
- size1 = size;
- while (size > 0) {
- /* read bytes from input buffer first */
- len = s->buf_end - s->buf_ptr;
- if (len > 0) {
- if (len > size)
- len = size;
- memcpy(buf, s->buf_ptr, len);
- s->buf_ptr += len;
- } else {
- len = url_read (s->hd, buf, size);
- if (len < 0) {
- return len;
- } else if (len == 0) {
- break;
- }
- }
- size -= len;
- buf += len;
+ int len;
+
+ /* read bytes from input buffer first */
+ len = s->buf_end - s->buf_ptr;
+ if (len > 0) {
+ if (len > size)
+ len = size;
+ memcpy(buf, s->buf_ptr, len);
+ s->buf_ptr += len;
+ } else {
+ len = url_read(s->hd, buf, size);
}
- return size1 - size;
+ if (len > 0)
+ s->off += len;
+ return len;
}
/* used only when posting data */
return 0;
}
+static offset_t http_seek(URLContext *h, offset_t off, int whence)
+{
+ HTTPContext *s = h->priv_data;
+ URLContext *old_hd = s->hd;
+ offset_t old_off = s->off;
+
+ if (whence == AVSEEK_SIZE)
+ return s->filesize;
+ else if ((s->filesize == -1 && whence == SEEK_END) || h->is_streamed)
+ return -1;
+
+ /* we save the old context in case the seek fails */
+ s->hd = NULL;
+ if (whence == SEEK_CUR)
+ off += s->off;
+ else if (whence == SEEK_END)
+ off += s->filesize;
+ s->off = off;
+
+ /* if it fails, continue on old connection */
+ if (http_open_cnx(h) < 0) {
+ s->hd = old_hd;
+ s->off = old_off;
+ return -1;
+ }
+ url_close(old_hd);
+ return off;
+}
+
URLProtocol http_protocol = {
"http",
http_open,
http_read,
http_write,
- NULL, /* seek */
+ http_seek,
http_close,
};
-
projects / ffmpeg / blobdiff