/*
* HTTP protocol for ffmpeg client
- * Copyright (c) 2000, 2001 Fabrice Bellard.
+ * 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 <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>
-
-
-/* XXX: POST protocol is not completly implemented because ffmpeg use
- only a subset of it */
+#include <strings.h>
+#include "network.h"
+#include "os_support.h"
-//#define DEBUG
+/* XXX: POST protocol is not completely implemented because ffmpeg uses
+ only a subset of it. */
/* 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;
+ int64_t chunksize; /**< Used if "Transfer-Encoding: chunked" otherwise -1. */
+ int64_t off, filesize;
char location[URL_SIZE];
} HTTPContext;
static int http_connect(URLContext *h, const char *path, const char *hoststr,
- const char *auth);
+ const char *auth, int *new_location);
static int http_write(URLContext *h, uint8_t *buf, int size);
-static char *b64_encode(const unsigned char *src );
/* 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);
+ av_strstart(proxy_path, "http://", NULL);
/* fill the dest addr */
redo:
/* needed in any case to build the host string */
url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
- path1, sizeof(path1), uri);
+ 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, 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, auth) < 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 AVERROR_IO;
+ 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->chunksize = -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 AVERROR_IO;
+ 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 http_get_line(HTTPContext *s, char *line, int line_size)
{
+ int ch;
+ char *q;
+
+ q = line;
+ for(;;) {
+ ch = http_getc(s);
+ if (ch < 0)
+ return AVERROR(EIO);
+ if (ch == '\n') {
+ /* process line */
+ if (q > line && q[-1] == '\r')
+ q--;
+ *q = '\0';
+
+ return 0;
+ } else {
+ if ((q - line) < line_size - 1)
+ *q++ = ch;
+ }
+ }
+}
+
+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 */
while (isspace(*p))
p++;
s->http_code = strtol(p, NULL, 10);
-#ifdef DEBUG
- printf("http_code=%d\n", s->http_code);
-#endif
+
+ dprintf(NULL, "http_code=%d\n", s->http_code);
+
+ /* error codes are 4xx and 5xx */
+ if (s->http_code >= 400 && s->http_code < 600)
+ return -1;
} else {
while (*p != '\0' && *p != ':')
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 */
+ } else if (!strcmp (tag, "Transfer-Encoding") && !strncasecmp(p, "chunked", 7)) {
+ s->filesize = -1;
+ s->chunksize = 0;
}
}
return 1;
}
static int http_connect(URLContext *h, const char *path, const char *hoststr,
- const char *auth)
+ const char *auth, int *new_location)
{
HTTPContext *s = h->priv_data;
- int post, err, ch;
- char line[1024], *q;
+ int post, err;
+ char line[1024];
+ char *auth_b64;
+ int auth_b64_len = (strlen(auth) + 2) / 3 * 4 + 1;
+ int64_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\r\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"
+ "%s"
"\r\n",
post ? "POST" : "GET",
path,
LIBAVFORMAT_IDENT,
+ s->off,
hoststr,
- b64_encode(auth));
+ auth_b64,
+ post ? "Transfer-Encoding: chunked\r\n" : "");
+ av_freep(&auth_b64);
if (http_write(h, s->buffer, strlen(s->buffer)) < 0)
- return AVERROR_IO;
+ 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);
+ /* always use chunked encoding for upload data */
+ s->chunksize = 0;
return 0;
}
/* wait for header */
- q = line;
for(;;) {
- ch = http_getc(s);
- if (ch < 0)
- return AVERROR_IO;
- if (ch == '\n') {
- /* process line */
- if (q > line && q[-1] == '\r')
- q--;
- *q = '\0';
-#ifdef DEBUG
- printf("header='%s'\n", line);
-#endif
- err = process_line(s, line, s->line_count);
- if (err < 0)
- return err;
- if (err == 0)
- return 0;
- s->line_count++;
- q = line;
- } else {
- if ((q - line) < sizeof(line) - 1)
- *q++ = ch;
- }
+ if (http_get_line(s, line, sizeof(line)) < 0)
+ return AVERROR(EIO);
+
+ dprintf(NULL, "header='%s'\n", line);
+
+ err = process_line(h, line, s->line_count, new_location);
+ if (err < 0)
+ return err;
+ if (err == 0)
+ break;
+ s->line_count++;
}
+
+ return (off == s->off) ? 0 : -1;
}
HTTPContext *s = h->priv_data;
int len;
+ if (s->chunksize >= 0) {
+ if (!s->chunksize) {
+ char line[32];
+
+ for(;;) {
+ do {
+ if (http_get_line(s, line, sizeof(line)) < 0)
+ return AVERROR(EIO);
+ } while (!*line); /* skip CR LF from last chunk */
+
+ s->chunksize = strtoll(line, NULL, 16);
+
+ dprintf(NULL, "Chunked encoding data size: %"PRId64"'\n", s->chunksize);
+
+ if (!s->chunksize)
+ return 0;
+ break;
+ }
+ }
+ size = FFMIN(size, s->chunksize);
+ }
/* read bytes from input buffer first */
len = s->buf_end - s->buf_ptr;
if (len > 0) {
} else {
len = url_read(s->hd, buf, size);
}
+ if (len > 0) {
+ s->off += len;
+ if (s->chunksize > 0)
+ s->chunksize -= len;
+ }
return len;
}
/* used only when posting data */
static int http_write(URLContext *h, uint8_t *buf, int size)
{
+ char temp[11]; /* 32-bit hex + CRLF + nul */
+ int ret;
+ char crlf[] = "\r\n";
HTTPContext *s = h->priv_data;
- return url_write(s->hd, buf, size);
+
+ if (s->chunksize == -1) {
+ /* headers are sent without any special encoding */
+ return url_write(s->hd, buf, size);
+ }
+
+ /* silently ignore zero-size data since chunk encoding that would
+ * signal EOF */
+ if (size > 0) {
+ /* upload data using chunked encoding */
+ snprintf(temp, sizeof(temp), "%x\r\n", size);
+
+ if ((ret = url_write(s->hd, temp, strlen(temp))) < 0 ||
+ (ret = url_write(s->hd, buf, size)) < 0 ||
+ (ret = url_write(s->hd, crlf, sizeof(crlf) - 1)) < 0)
+ return ret;
+ }
+ return size;
}
static int http_close(URLContext *h)
{
+ int ret = 0;
+ char footer[] = "0\r\n\r\n";
HTTPContext *s = h->priv_data;
+
+ /* signal end of chunked encoding if used */
+ if ((h->flags & URL_WRONLY) && s->chunksize != -1) {
+ ret = url_write(s->hd, footer, sizeof(footer) - 1);
+ ret = ret > 0 ? 0 : ret;
+ }
+
url_close(s->hd);
av_free(s);
- return 0;
+ return ret;
+}
+
+static int64_t http_seek(URLContext *h, int64_t off, int whence)
+{
+ HTTPContext *s = h->priv_data;
+ URLContext *old_hd = s->hd;
+ int64_t old_off = s->off;
+ uint8_t old_buf[BUFFER_SIZE];
+ int old_buf_size;
+
+ 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 */
+ old_buf_size = s->buf_end - s->buf_ptr;
+ memcpy(old_buf, s->buf_ptr, old_buf_size);
+ 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) {
+ memcpy(s->buffer, old_buf, old_buf_size);
+ s->buf_ptr = s->buffer;
+ s->buf_end = s->buffer + old_buf_size;
+ s->hd = old_hd;
+ s->off = old_off;
+ return -1;
+ }
+ url_close(old_hd);
+ return off;
+}
+
+static int
+http_get_file_handle(URLContext *h)
+{
+ HTTPContext *s = h->priv_data;
+ return url_get_file_handle(s->hd);
}
URLProtocol http_protocol = {
http_open,
http_read,
http_write,
- NULL, /* seek */
+ http_seek,
http_close,
+ .url_get_file_handle = http_get_file_handle,
};
-
-/*****************************************************************************
- * b64_encode: stolen from VLC's http.c
- *****************************************************************************/
-
-static char *b64_encode( const unsigned char *src )
-{
- static const char b64[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
- unsigned int len= strlen(src);
- char *ret, *dst;
- unsigned i_bits = 0;
- unsigned i_shift = 0;
-
- if(len < UINT_MAX/4){
- ret=dst= av_malloc( len * 4 / 3 + 12 );
- }else
- return NULL;
-
- for( ;; )
- {
- if( *src )
- {
- i_bits = ( i_bits << 8 )|( *src++ );
- i_shift += 8;
- }
- else if( i_shift > 0 )
- {
- i_bits <<= 6 - i_shift;
- i_shift = 6;
- }
- else
- {
- *dst++ = '=';
- break;
- }
-
- while( i_shift >= 6 )
- {
- i_shift -= 6;
- *dst++ = b64[(i_bits >> i_shift)&0x3f];
- }
- }
-
- *dst++ = '\0';
-
- return ret;
-}
-
projects / ffmpeg / blobdiff