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Gopher protocol, patch by Toshimitsu Kimura, lovesyao gmail com
Originally committed as revision 17159 to svn://svn.ffmpeg.org/ffmpeg/trunk
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/* | ||
* Gopher protocol | ||
* | ||
* Copyright (c) 2009 Toshimitsu Kimura | ||
* | ||
* based on libavformat/http.c, Copyright (c) 2000, 2001 Fabrice Bellard | ||
* | ||
* 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 2.1 of the License, or (at your option) any later version. | ||
* | ||
* 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 FFmpeg; if not, write to the Free Software | ||
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | ||
*/ | ||
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#include "libavutil/avstring.h" | ||
#include "avformat.h" | ||
#include "network.h" | ||
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typedef struct { | ||
URLContext *hd; | ||
} GopherContext; | ||
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static int gopher_write(URLContext *h, uint8_t *buf, int size) | ||
{ | ||
GopherContext *s = h->priv_data; | ||
return url_write(s->hd, buf, size); | ||
} | ||
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static int gopher_connect(URLContext *h, const char *path) | ||
{ | ||
char buffer[1024]; | ||
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if (!*path) return AVERROR(EINVAL); | ||
switch (*++path) { | ||
case '5': | ||
case '9': | ||
path = strchr(path, '/'); | ||
if (!path) return AVERROR(EINVAL); | ||
break; | ||
default: | ||
av_log(NULL, AV_LOG_WARNING, | ||
"Gopher protocol type '%c' not supported yet!\n", | ||
*path); | ||
return AVERROR(EINVAL); | ||
} | ||
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/* send gopher sector */ | ||
snprintf(buffer, sizeof(buffer), "%s\r\n", path); | ||
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if (gopher_write(h, buffer, strlen(buffer)) < 0) | ||
return AVERROR(EIO); | ||
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return 0; | ||
} | ||
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static int gopher_close(URLContext *h) | ||
{ | ||
GopherContext *s = h->priv_data; | ||
if (s->hd) { | ||
url_close(s->hd); | ||
s->hd = NULL; | ||
} | ||
av_freep(&h->priv_data); | ||
return 0; | ||
} | ||
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static int gopher_open(URLContext *h, const char *uri, int flags) | ||
{ | ||
GopherContext *s; | ||
char hostname[1024], auth[1024], path[1024], buf[1024]; | ||
int port, err; | ||
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h->is_streamed = 1; | ||
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s = av_malloc(sizeof(GopherContext)); | ||
if (!s) { | ||
return AVERROR(ENOMEM); | ||
} | ||
h->priv_data = s; | ||
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/* needed in any case to build the host string */ | ||
url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port, | ||
path, sizeof(path), uri); | ||
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if (port < 0) | ||
port = 70; | ||
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snprintf(buf, sizeof(buf), "tcp://%s:%d", hostname, port); | ||
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s->hd = NULL; | ||
err = url_open(&s->hd, buf, URL_RDWR); | ||
if (err < 0) | ||
goto fail; | ||
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if ((err = gopher_connect(h, path)) < 0) | ||
goto fail; | ||
return 0; | ||
fail: | ||
gopher_close(h); | ||
return err; | ||
} | ||
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static int gopher_read(URLContext *h, uint8_t *buf, int size) | ||
{ | ||
GopherContext *s = h->priv_data; | ||
int len = url_read(s->hd, buf, size); | ||
return len; | ||
} | ||
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URLProtocol gopher_protocol = { | ||
"gopher", | ||
gopher_open, | ||
gopher_read, | ||
gopher_write, | ||
NULL, /*seek*/ | ||
gopher_close, | ||
}; |