1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
|
/*
* Gopher protocol
*
* Copyright (c) 2009 Toshimitsu Kimura
*
* based on libavformat/http.c, Copyright (c) 2000, 2001 Fabrice Bellard
*
* This file is part of Libav.
*
* Libav 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.
*
* Libav 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 Libav; 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;
if (s->hd) {
ffurl_close(s->hd);
s->hd = NULL;
}
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(&s->hd, buf, AVIO_FLAG_READ_WRITE,
&h->interrupt_callback, NULL, h->protocols);
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,
};
|
