1/* 2 * Gopher protocol 3 * 4 * Copyright (c) 2009 Toshimitsu Kimura 5 * 6 * based on libavformat/http.c, Copyright (c) 2000, 2001 Fabrice Bellard 7 * 8 * This file is part of FFmpeg. 9 * 10 * FFmpeg is free software; you can redistribute it and/or 11 * modify it under the terms of the GNU Lesser General Public 12 * License as published by the Free Software Foundation; either 13 * version 2.1 of the License, or (at your option) any later version. 14 * 15 * FFmpeg is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 18 * Lesser General Public License for more details. 19 * 20 * You should have received a copy of the GNU Lesser General Public 21 * License along with FFmpeg; if not, write to the Free Software 22 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 23 */ 24 25#include "libavutil/avstring.h" 26#include "avformat.h" 27#include "network.h" 28 29typedef struct { 30 URLContext *hd; 31} GopherContext; 32 33static int gopher_write(URLContext *h, uint8_t *buf, int size) 34{ 35 GopherContext *s = h->priv_data; 36 return url_write(s->hd, buf, size); 37} 38 39static int gopher_connect(URLContext *h, const char *path) 40{ 41 char buffer[1024]; 42 43 if (!*path) return AVERROR(EINVAL); 44 switch (*++path) { 45 case '5': 46 case '9': 47 path = strchr(path, '/'); 48 if (!path) return AVERROR(EINVAL); 49 break; 50 default: 51 av_log(NULL, AV_LOG_WARNING, 52 "Gopher protocol type '%c' not supported yet!\n", 53 *path); 54 return AVERROR(EINVAL); 55 } 56 57 /* send gopher sector */ 58 snprintf(buffer, sizeof(buffer), "%s\r\n", path); 59 60 if (gopher_write(h, buffer, strlen(buffer)) < 0) 61 return AVERROR(EIO); 62 63 return 0; 64} 65 66static int gopher_close(URLContext *h) 67{ 68 GopherContext *s = h->priv_data; 69 if (s->hd) { 70 url_close(s->hd); 71 s->hd = NULL; 72 } 73 av_freep(&h->priv_data); 74 return 0; 75} 76 77static int gopher_open(URLContext *h, const char *uri, int flags) 78{ 79 GopherContext *s; 80 char hostname[1024], auth[1024], path[1024], buf[1024]; 81 int port, err; 82 83 h->is_streamed = 1; 84 85 s = av_malloc(sizeof(GopherContext)); 86 if (!s) { 87 return AVERROR(ENOMEM); 88 } 89 h->priv_data = s; 90 91 /* needed in any case to build the host string */ 92 url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port, 93 path, sizeof(path), uri); 94 95 if (port < 0) 96 port = 70; 97 98 snprintf(buf, sizeof(buf), "tcp://%s:%d", hostname, port); 99 100 s->hd = NULL; 101 err = url_open(&s->hd, buf, URL_RDWR); 102 if (err < 0) 103 goto fail; 104 105 if ((err = gopher_connect(h, path)) < 0) 106 goto fail; 107 return 0; 108 fail: 109 gopher_close(h); 110 return err; 111} 112 113static int gopher_read(URLContext *h, uint8_t *buf, int size) 114{ 115 GopherContext *s = h->priv_data; 116 int len = url_read(s->hd, buf, size); 117 return len; 118} 119 120 121URLProtocol gopher_protocol = { 122 "gopher", 123 gopher_open, 124 gopher_read, 125 gopher_write, 126 NULL, /*seek*/ 127 gopher_close, 128}; 129