131 lines
3.2 KiB
C
131 lines
3.2 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 {
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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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av_freep(&h->priv_data);
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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;
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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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s = av_malloc(sizeof(GopherContext));
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if (!s) {
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return AVERROR(ENOMEM);
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}
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h->priv_data = s;
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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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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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};
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