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
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
|
/*
* URL utility functions
* Copyright (c) 2000, 2001, 2002 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 "avformat.h"
#include "internal.h"
#include "config.h"
#include "url.h"
#if CONFIG_NETWORK
#include "network.h"
#endif
#include "libavutil/avstring.h"
/**
* @file
* URL utility functions.
*/
int ff_url_join(char *str, int size, const char *proto,
const char *authorization, const char *hostname,
int port, const char *fmt, ...)
{
#if CONFIG_NETWORK
struct addrinfo hints = { 0 }, *ai;
#endif
str[0] = '\0';
if (proto)
av_strlcatf(str, size, "%s://", proto);
if (authorization && authorization[0])
av_strlcatf(str, size, "%s@", authorization);
#if CONFIG_NETWORK && defined(AF_INET6)
/* Determine if hostname is a numerical IPv6 address,
* properly escape it within [] in that case. */
hints.ai_flags = AI_NUMERICHOST;
if (!getaddrinfo(hostname, NULL, &hints, &ai)) {
if (ai->ai_family == AF_INET6) {
av_strlcat(str, "[", size);
av_strlcat(str, hostname, size);
av_strlcat(str, "]", size);
} else {
av_strlcat(str, hostname, size);
}
freeaddrinfo(ai);
} else
#endif
/* Not an IPv6 address, just output the plain string. */
av_strlcat(str, hostname, size);
if (port >= 0)
av_strlcatf(str, size, ":%d", port);
if (fmt) {
va_list vl;
size_t len = strlen(str);
va_start(vl, fmt);
vsnprintf(str + len, size > len ? size - len : 0, fmt, vl);
va_end(vl);
}
return strlen(str);
}
static void trim_double_dot_url(char *buf, const char *rel, int size)
{
const char *p = rel;
const char *root = rel;
char tmp_path[MAX_URL_SIZE] = {0, };
char *sep;
char *node;
/* Get the path root of the url which start by "://" */
if (p && (sep = strstr(p, "://"))) {
sep += 3;
root = strchr(sep, '/');
}
/* set new current position if the root node is changed */
p = root;
while (p && (node = strstr(p, ".."))) {
av_strlcat(tmp_path, p, node - p + strlen(tmp_path));
p = node + 3;
sep = strrchr(tmp_path, '/');
if (sep)
sep[0] = '\0';
else
tmp_path[0] = '\0';
}
if (!av_stristart(p, "/", NULL) && root != rel)
av_strlcat(tmp_path, "/", size);
av_strlcat(tmp_path, p, size);
/* start set buf after temp path process. */
av_strlcpy(buf, rel, root - rel + 1);
if (!av_stristart(tmp_path, "/", NULL) && root != rel)
av_strlcat(buf, "/", size);
av_strlcat(buf, tmp_path, size);
}
void ff_make_absolute_url(char *buf, int size, const char *base,
const char *rel)
{
char *sep, *path_query;
char *root, *p;
char tmp_path[MAX_URL_SIZE];
memset(tmp_path, 0, sizeof(tmp_path));
/* Absolute path, relative to the current server */
if (base && strstr(base, "://") && rel[0] == '/') {
if (base != buf)
av_strlcpy(buf, base, size);
sep = strstr(buf, "://");
if (sep) {
/* Take scheme from base url */
if (rel[1] == '/') {
sep[1] = '\0';
} else {
/* Take scheme and host from base url */
sep += 3;
sep = strchr(sep, '/');
if (sep)
*sep = '\0';
}
}
av_strlcat(buf, rel, size);
trim_double_dot_url(tmp_path, buf, size);
memset(buf, 0, size);
av_strlcpy(buf, tmp_path, size);
return;
}
/* If rel actually is an absolute url, just copy it */
if (!base || strstr(rel, "://") || rel[0] == '/') {
trim_double_dot_url(buf, rel, size);
return;
}
if (base != buf)
av_strlcpy(buf, base, size);
/* Strip off any query string from base */
path_query = strchr(buf, '?');
if (path_query)
*path_query = '\0';
/* Is relative path just a new query part? */
if (rel[0] == '?') {
av_strlcat(buf, rel, size);
trim_double_dot_url(tmp_path, buf, size);
memset(buf, 0, size);
av_strlcpy(buf, tmp_path, size);
return;
}
root = p = buf;
/* Get the path root of the url which start by "://" */
if (p && strstr(p, "://")) {
sep = strstr(p, "://");
if (sep) {
sep += 3;
root = strchr(sep, '/');
}
}
/* Remove the file name from the base url */
sep = strrchr(buf, '/');
if (sep <= root)
sep = root;
if (sep)
sep[1] = '\0';
else
buf[0] = '\0';
while (av_strstart(rel, "..", NULL) && sep) {
/* Remove the path delimiter at the end */
if (sep > root) {
sep[0] = '\0';
sep = strrchr(buf, '/');
}
/* If the next directory name to pop off is "..", break here */
if (!strcmp(sep ? &sep[1] : buf, "..")) {
/* Readd the slash we just removed */
av_strlcat(buf, "/", size);
break;
}
/* Cut off the directory name */
if (sep)
sep[1] = '\0';
else
buf[0] = '\0';
rel += 3;
}
av_strlcat(buf, rel, size);
trim_double_dot_url(tmp_path, buf, size);
memset(buf, 0, size);
av_strlcpy(buf, tmp_path, size);
}
AVIODirEntry *ff_alloc_dir_entry(void)
{
AVIODirEntry *entry = av_mallocz(sizeof(AVIODirEntry));
if (entry) {
entry->type = AVIO_ENTRY_UNKNOWN;
entry->size = -1;
entry->modification_timestamp = -1;
entry->access_timestamp = -1;
entry->status_change_timestamp = -1;
entry->user_id = -1;
entry->group_id = -1;
entry->filemode = -1;
}
return entry;
}
|
