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https://git.videolan.org/git/ffmpeg.git
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2758cdedfb
Instead of a linked list constructed at av_register_all(), store them in a constant array of pointers. Since no registration is necessary now, this removes some global state from lavf. This will also allow the urlprotocol layer caller to limit the available protocols in a simple and flexible way in the following commits.
126 lines
3.3 KiB
C
126 lines
3.3 KiB
C
/*
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* Gopher protocol
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*
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* Copyright (c) 2009 Toshimitsu Kimura
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*
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* based on libavformat/http.c, Copyright (c) 2000, 2001 Fabrice Bellard
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/avstring.h"
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#include "avformat.h"
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#include "internal.h"
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#include "network.h"
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#include "url.h"
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typedef struct GopherContext {
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URLContext *hd;
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} GopherContext;
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static int gopher_write(URLContext *h, const uint8_t *buf, int size)
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{
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GopherContext *s = h->priv_data;
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return ffurl_write(s->hd, buf, size);
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}
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static int gopher_connect(URLContext *h, const char *path)
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{
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char buffer[1024];
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if (!*path) return AVERROR(EINVAL);
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switch (*++path) {
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case '5':
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case '9':
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path = strchr(path, '/');
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if (!path) return AVERROR(EINVAL);
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break;
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default:
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av_log(h, AV_LOG_WARNING,
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"Gopher protocol type '%c' not supported yet!\n",
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*path);
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return AVERROR(EINVAL);
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}
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/* send gopher sector */
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snprintf(buffer, sizeof(buffer), "%s\r\n", path);
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if (gopher_write(h, buffer, strlen(buffer)) < 0)
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return AVERROR(EIO);
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return 0;
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}
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static int gopher_close(URLContext *h)
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{
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GopherContext *s = h->priv_data;
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if (s->hd) {
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ffurl_close(s->hd);
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s->hd = NULL;
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}
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return 0;
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}
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static int gopher_open(URLContext *h, const char *uri, int flags)
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{
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GopherContext *s = h->priv_data;
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char hostname[1024], auth[1024], path[1024], buf[1024];
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int port, err;
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h->is_streamed = 1;
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/* needed in any case to build the host string */
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av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port,
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path, sizeof(path), uri);
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if (port < 0)
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port = 70;
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ff_url_join(buf, sizeof(buf), "tcp", NULL, hostname, port, NULL);
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s->hd = NULL;
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err = ffurl_open(&s->hd, buf, AVIO_FLAG_READ_WRITE,
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&h->interrupt_callback, NULL);
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if (err < 0)
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goto fail;
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if ((err = gopher_connect(h, path)) < 0)
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goto fail;
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return 0;
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fail:
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gopher_close(h);
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return err;
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}
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static int gopher_read(URLContext *h, uint8_t *buf, int size)
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{
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GopherContext *s = h->priv_data;
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int len = ffurl_read(s->hd, buf, size);
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return len;
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}
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const URLProtocol ff_gopher_protocol = {
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.name = "gopher",
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.url_open = gopher_open,
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.url_read = gopher_read,
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.url_write = gopher_write,
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.url_close = gopher_close,
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.priv_data_size = sizeof(GopherContext),
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.flags = URL_PROTOCOL_FLAG_NETWORK,
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};
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