mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-07 11:13:41 +02:00
5509bffa88
Originally committed as revision 4842 to svn://svn.ffmpeg.org/ffmpeg/trunk
333 lines
7.8 KiB
C
333 lines
7.8 KiB
C
/*
|
|
* HTTP protocol for ffmpeg client
|
|
* Copyright (c) 2000, 2001 Fabrice Bellard.
|
|
*
|
|
* This library 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.
|
|
*
|
|
* This library 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
#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 */
|
|
|
|
//#define DEBUG
|
|
|
|
/* used for protocol handling */
|
|
#define BUFFER_SIZE 1024
|
|
#define URL_SIZE 4096
|
|
|
|
typedef struct {
|
|
URLContext *hd;
|
|
unsigned char buffer[BUFFER_SIZE], *buf_ptr, *buf_end;
|
|
int line_count;
|
|
int http_code;
|
|
char location[URL_SIZE];
|
|
} HTTPContext;
|
|
|
|
static int http_connect(URLContext *h, const char *path, const char *hoststr,
|
|
const char *auth);
|
|
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)
|
|
{
|
|
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;
|
|
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);
|
|
|
|
/* 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);
|
|
if (port > 0) {
|
|
snprintf(hoststr, sizeof(hoststr), "%s:%d", hostname, port);
|
|
} else {
|
|
pstrcpy(hoststr, sizeof(hoststr), hostname);
|
|
}
|
|
|
|
if (use_proxy) {
|
|
url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
|
|
NULL, 0, proxy_path);
|
|
path = uri;
|
|
} else {
|
|
if (path1[0] == '\0')
|
|
path = "/";
|
|
else
|
|
path = path1;
|
|
}
|
|
if (port < 0)
|
|
port = 80;
|
|
|
|
snprintf(buf, sizeof(buf), "tcp://%s:%d", hostname, port);
|
|
err = url_open(&hd, buf, URL_RDWR);
|
|
if (err < 0)
|
|
goto fail;
|
|
|
|
s->hd = hd;
|
|
if (http_connect(h, path, hoststr, auth) < 0)
|
|
goto fail;
|
|
if (s->http_code == 303 && s->location[0] != '\0') {
|
|
/* url moved, get next */
|
|
uri = s->location;
|
|
url_close(hd);
|
|
goto redo;
|
|
}
|
|
return 0;
|
|
fail:
|
|
if (hd)
|
|
url_close(hd);
|
|
av_free(s);
|
|
return AVERROR_IO;
|
|
}
|
|
|
|
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;
|
|
} else if (len == 0) {
|
|
return -1;
|
|
} else {
|
|
s->buf_ptr = s->buffer;
|
|
s->buf_end = s->buffer + len;
|
|
}
|
|
}
|
|
return *s->buf_ptr++;
|
|
}
|
|
|
|
static int process_line(HTTPContext *s, char *line, int line_count)
|
|
{
|
|
char *tag, *p;
|
|
|
|
/* end of header */
|
|
if (line[0] == '\0')
|
|
return 0;
|
|
|
|
p = line;
|
|
if (line_count == 0) {
|
|
while (!isspace(*p) && *p != '\0')
|
|
p++;
|
|
while (isspace(*p))
|
|
p++;
|
|
s->http_code = strtol(p, NULL, 10);
|
|
#ifdef DEBUG
|
|
printf("http_code=%d\n", s->http_code);
|
|
#endif
|
|
} else {
|
|
while (*p != '\0' && *p != ':')
|
|
p++;
|
|
if (*p != ':')
|
|
return 1;
|
|
|
|
*p = '\0';
|
|
tag = line;
|
|
p++;
|
|
while (isspace(*p))
|
|
p++;
|
|
if (!strcmp(tag, "Location")) {
|
|
strcpy(s->location, p);
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
static int http_connect(URLContext *h, const char *path, const char *hoststr,
|
|
const char *auth)
|
|
{
|
|
HTTPContext *s = h->priv_data;
|
|
int post, err, ch;
|
|
char line[1024], *q;
|
|
|
|
|
|
/* send http header */
|
|
post = h->flags & URL_WRONLY;
|
|
|
|
snprintf(s->buffer, sizeof(s->buffer),
|
|
"%s %s HTTP/1.0\r\n"
|
|
"User-Agent: %s\r\n"
|
|
"Accept: */*\r\n"
|
|
"Host: %s\r\n"
|
|
"Authorization: Basic %s\r\n"
|
|
"\r\n",
|
|
post ? "POST" : "GET",
|
|
path,
|
|
LIBAVFORMAT_IDENT,
|
|
hoststr,
|
|
b64_encode(auth));
|
|
|
|
if (http_write(h, s->buffer, strlen(s->buffer)) < 0)
|
|
return AVERROR_IO;
|
|
|
|
/* init input buffer */
|
|
s->buf_ptr = s->buffer;
|
|
s->buf_end = s->buffer;
|
|
s->line_count = 0;
|
|
s->location[0] = '\0';
|
|
if (post) {
|
|
sleep(1);
|
|
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;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
static int http_read(URLContext *h, uint8_t *buf, int size)
|
|
{
|
|
HTTPContext *s = h->priv_data;
|
|
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 len;
|
|
}
|
|
|
|
/* used only when posting data */
|
|
static int http_write(URLContext *h, uint8_t *buf, int size)
|
|
{
|
|
HTTPContext *s = h->priv_data;
|
|
return url_write(s->hd, buf, size);
|
|
}
|
|
|
|
static int http_close(URLContext *h)
|
|
{
|
|
HTTPContext *s = h->priv_data;
|
|
url_close(s->hd);
|
|
av_free(s);
|
|
return 0;
|
|
}
|
|
|
|
URLProtocol http_protocol = {
|
|
"http",
|
|
http_open,
|
|
http_read,
|
|
http_write,
|
|
NULL, /* seek */
|
|
http_close,
|
|
};
|
|
|
|
/*****************************************************************************
|
|
* 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;
|
|
}
|
|
|