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
|
/*
* Copyright (C) 2003-2013 The Music Player Daemon Project
* http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "UriUtil.hxx"
#include <assert.h>
#include <string.h>
bool uri_has_scheme(const char *uri)
{
return strstr(uri, "://") != nullptr;
}
/* suffixes should be ascii only characters */
const char *
uri_get_suffix(const char *uri)
{
const char *suffix = strrchr(uri, '.');
if (suffix == nullptr || suffix == uri ||
suffix[-1] == '/' || suffix[-1] == '\\')
return nullptr;
++suffix;
if (strpbrk(suffix, "/\\") != nullptr)
return nullptr;
return suffix;
}
const char *
uri_get_suffix(const char *uri, UriSuffixBuffer &buffer)
{
const char *suffix = uri_get_suffix(uri);
if (suffix == nullptr)
return nullptr;
const char *q = strchr(suffix, '?');
if (q != nullptr && size_t(q - suffix) < sizeof(buffer.data)) {
memcpy(buffer.data, suffix, q - suffix);
buffer.data[q - suffix] = 0;
suffix = buffer.data;
}
return suffix;
}
static const char *
verify_uri_segment(const char *p)
{
const char *q;
unsigned dots = 0;
while (*p == '.') {
++p;
++dots;
}
if (dots <= 2 && (*p == 0 || *p == '/'))
return nullptr;
q = strchr(p + 1, '/');
return q != nullptr ? q : "";
}
bool
uri_safe_local(const char *uri)
{
while (true) {
uri = verify_uri_segment(uri);
if (uri == nullptr)
return false;
if (*uri == 0)
return true;
assert(*uri == '/');
++uri;
}
}
std::string
uri_remove_auth(const char *uri)
{
const char *auth, *slash, *at;
if (memcmp(uri, "http://", 7) == 0)
auth = uri + 7;
else if (memcmp(uri, "https://", 8) == 0)
auth = uri + 8;
else
/* unrecognized URI */
return std::string();
slash = strchr(auth, '/');
if (slash == nullptr)
slash = auth + strlen(auth);
at = (const char *)memchr(auth, '@', slash - auth);
if (at == nullptr)
/* no auth info present, do nothing */
return std::string();
/* duplicate the full URI and then delete the auth
information */
std::string result(uri);
result.erase(auth - uri, at + 1 - auth);
return result;
}
bool
uri_is_child(const char *parent, const char *child)
{
#if !CLANG_CHECK_VERSION(3,6)
/* disabled on clang due to -Wtautological-pointer-compare */
assert(parent != nullptr);
assert(child != nullptr);
#endif
const size_t parent_length = strlen(parent);
return memcmp(parent, child, parent_length) == 0 &&
child[parent_length] == '/';
}
bool
uri_is_child_or_same(const char *parent, const char *child)
{
return strcmp(parent, child) == 0 || uri_is_child(parent, child);
}
|
