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2ba45a60 DM |
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 { | |
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(&s->hd, buf, AVIO_FLAG_READ_WRITE, | |
97 | &h->interrupt_callback, NULL); | |
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 | 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 | }; |