blob: 3070b24caf2cfa2ac654c69a126afc365bbcae99
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 "internal.h" |
28 | #include "network.h" |
29 | #include "url.h" |
30 | |
31 | typedef struct GopherContext { |
32 | URLContext *hd; |
33 | } GopherContext; |
34 | |
35 | static int gopher_write(URLContext *h, const uint8_t *buf, int size) |
36 | { |
37 | GopherContext *s = h->priv_data; |
38 | return ffurl_write(s->hd, buf, size); |
39 | } |
40 | |
41 | static int gopher_connect(URLContext *h, const char *path) |
42 | { |
43 | char buffer[1024]; |
44 | |
45 | if (!*path) return AVERROR(EINVAL); |
46 | switch (*++path) { |
47 | case '5': |
48 | case '9': |
49 | path = strchr(path, '/'); |
50 | if (!path) return AVERROR(EINVAL); |
51 | break; |
52 | default: |
53 | av_log(h, AV_LOG_WARNING, |
54 | "Gopher protocol type '%c' not supported yet!\n", |
55 | *path); |
56 | return AVERROR(EINVAL); |
57 | } |
58 | |
59 | /* send gopher sector */ |
60 | snprintf(buffer, sizeof(buffer), "%s\r\n", path); |
61 | |
62 | if (gopher_write(h, buffer, strlen(buffer)) < 0) |
63 | return AVERROR(EIO); |
64 | |
65 | return 0; |
66 | } |
67 | |
68 | static int gopher_close(URLContext *h) |
69 | { |
70 | GopherContext *s = h->priv_data; |
71 | if (s->hd) { |
72 | ffurl_close(s->hd); |
73 | s->hd = NULL; |
74 | } |
75 | return 0; |
76 | } |
77 | |
78 | static int gopher_open(URLContext *h, const char *uri, int flags) |
79 | { |
80 | GopherContext *s = h->priv_data; |
81 | char hostname[1024], auth[1024], path[1024], buf[1024]; |
82 | int port, err; |
83 | |
84 | h->is_streamed = 1; |
85 | |
86 | /* needed in any case to build the host string */ |
87 | av_url_split(NULL, 0, auth, sizeof(auth), hostname, sizeof(hostname), &port, |
88 | path, sizeof(path), uri); |
89 | |
90 | if (port < 0) |
91 | port = 70; |
92 | |
93 | ff_url_join(buf, sizeof(buf), "tcp", NULL, hostname, port, NULL); |
94 | |
95 | s->hd = NULL; |
96 | err = ffurl_open_whitelist(&s->hd, buf, AVIO_FLAG_READ_WRITE, |
97 | &h->interrupt_callback, NULL, h->protocol_whitelist, h->protocol_blacklist, h); |
98 | if (err < 0) |
99 | goto fail; |
100 | |
101 | if ((err = gopher_connect(h, path)) < 0) |
102 | goto fail; |
103 | return 0; |
104 | fail: |
105 | gopher_close(h); |
106 | return err; |
107 | } |
108 | |
109 | static int gopher_read(URLContext *h, uint8_t *buf, int size) |
110 | { |
111 | GopherContext *s = h->priv_data; |
112 | int len = ffurl_read(s->hd, buf, size); |
113 | return len; |
114 | } |
115 | |
116 | |
117 | const URLProtocol ff_gopher_protocol = { |
118 | .name = "gopher", |
119 | .url_open = gopher_open, |
120 | .url_read = gopher_read, |
121 | .url_write = gopher_write, |
122 | .url_close = gopher_close, |
123 | .priv_data_size = sizeof(GopherContext), |
124 | .flags = URL_PROTOCOL_FLAG_NETWORK, |
125 | }; |
126 |