| /* |
| * 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 |
| */ |
| |
| #include "libavutil/avstring.h" |
| #include "avformat.h" |
| #include "internal.h" |
| #include "network.h" |
| #include "url.h" |
| |
| typedef struct GopherContext { |
| URLContext *hd; |
| } GopherContext; |
| |
| static int gopher_write(URLContext *h, const uint8_t *buf, int size) |
| { |
| GopherContext *s = h->priv_data; |
| return ffurl_write(s->hd, buf, size); |
| } |
| |
| static int gopher_connect(URLContext *h, const char *path) |
| { |
| char buffer[1024]; |
| |
| if (!*path) return AVERROR(EINVAL); |
| switch (*++path) { |
| case '5': |
| case '9': |
| path = strchr(path, '/'); |
| if (!path) return AVERROR(EINVAL); |
| break; |
| default: |
| av_log(h, AV_LOG_WARNING, |
| "Gopher protocol type '%c' not supported yet!\n", |
| *path); |
| return AVERROR(EINVAL); |
| } |
| |
| /* send gopher sector */ |
| snprintf(buffer, sizeof(buffer), "%s\r\n", path); |
| |
| if (gopher_write(h, buffer, strlen(buffer)) < 0) |
| return AVERROR(EIO); |
| |
| return 0; |
| } |
| |
| static int gopher_close(URLContext *h) |
| { |
| GopherContext *s = h->priv_data; |
| ffurl_closep(&s->hd); |
| return 0; |
| } |
| |
| static int gopher_open(URLContext *h, const char *uri, int flags) |
| { |
| GopherContext *s = h->priv_data; |
| char hostname[1024], auth[1024], path[1024], buf[1024]; |
| int port, err; |
| |
| h->is_streamed = 1; |
| |
| /* needed in any case to build the host string */ |
| av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port, |
| path, sizeof(path), uri); |
| |
| if (port < 0) |
| port = 70; |
| |
| ff_url_join(buf, sizeof(buf), "tcp", NULL, hostname, port, NULL); |
| |
| s->hd = NULL; |
| err = ffurl_open_whitelist(&s->hd, buf, AVIO_FLAG_READ_WRITE, |
| &h->interrupt_callback, NULL, h->protocol_whitelist, h->protocol_blacklist, h); |
| if (err < 0) |
| goto fail; |
| |
| if ((err = gopher_connect(h, path)) < 0) |
| goto fail; |
| return 0; |
| fail: |
| gopher_close(h); |
| return err; |
| } |
| |
| static int gopher_read(URLContext *h, uint8_t *buf, int size) |
| { |
| GopherContext *s = h->priv_data; |
| int len = ffurl_read(s->hd, buf, size); |
| return len; |
| } |
| |
| |
| const URLProtocol ff_gopher_protocol = { |
| .name = "gopher", |
| .url_open = gopher_open, |
| .url_read = gopher_read, |
| .url_write = gopher_write, |
| .url_close = gopher_close, |
| .priv_data_size = sizeof(GopherContext), |
| .flags = URL_PROTOCOL_FLAG_NETWORK, |
| }; |