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
|
// Copyright (c) 2006-2009 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/common/extensions/url_pattern.h"
#include "base/string_piece.h"
#include "base/string_util.h"
#include "chrome/common/url_constants.h"
// TODO(aa): Consider adding chrome-extension? What about more obscure ones
// like data: and javascript: ?
static const char* kValidSchemes[] = {
chrome::kHttpScheme,
chrome::kHttpsScheme,
chrome::kFileScheme,
chrome::kFtpScheme,
chrome::kChromeUIScheme,
};
static const char kPathSeparator[] = "/";
static bool IsValidScheme(const std::string& scheme) {
for (size_t i = 0; i < arraysize(kValidSchemes); ++i) {
if (scheme == kValidSchemes[i])
return true;
}
return false;
}
bool URLPattern::Parse(const std::string& pattern) {
size_t scheme_end_pos = pattern.find(chrome::kStandardSchemeSeparator);
if (scheme_end_pos == std::string::npos)
return false;
scheme_ = pattern.substr(0, scheme_end_pos);
if (!IsValidScheme(scheme_))
return false;
size_t host_start_pos = scheme_end_pos +
strlen(chrome::kStandardSchemeSeparator);
if (host_start_pos >= pattern.length())
return false;
// Parse out the host and path.
size_t path_start_pos = 0;
// File URLs are special because they have no host. There are other schemes
// with the same structure, but we don't support them (yet).
if (scheme_ == "file") {
path_start_pos = host_start_pos;
} else {
size_t host_end_pos = pattern.find(kPathSeparator, host_start_pos);
if (host_end_pos == std::string::npos)
return false;
host_ = pattern.substr(host_start_pos, host_end_pos - host_start_pos);
// The first component can optionally be '*' to match all subdomains.
std::vector<std::string> host_components;
SplitString(host_, '.', &host_components);
if (host_components[0] == "*") {
match_subdomains_ = true;
host_components.erase(host_components.begin(),
host_components.begin() + 1);
}
host_ = JoinString(host_components, '.');
// No other '*' can occur in the host, though. This isn't necessary, but is
// done as a convenience to developers who might otherwise be confused and
// think '*' works as a glob in the host.
if (host_.find('*') != std::string::npos)
return false;
path_start_pos = host_end_pos;
}
path_ = pattern.substr(path_start_pos);
return true;
}
bool URLPattern::MatchesUrl(const GURL &test) {
if (test.scheme() != scheme_)
return false;
if (!MatchesHost(test))
return false;
if (!MatchesPath(test))
return false;
return true;
}
bool URLPattern::MatchesHost(const GURL& test) {
if (test.host() == host_)
return true;
if (!match_subdomains_ || test.HostIsIPAddress())
return false;
// If we're matching subdomains, and we have no host, that means the pattern
// was <scheme>://*/<whatever>, so we match anything.
if (host_.empty())
return true;
// Check if the test host is a subdomain of our host.
if (test.host().length() <= (host_.length() + 1))
return false;
if (test.host().compare(test.host().length() - host_.length(),
host_.length(), host_) != 0)
return false;
return test.host()[test.host().length() - host_.length() - 1] == '.';
}
bool URLPattern::MatchesPath(const GURL& test) {
if (path_escaped_.empty()) {
path_escaped_ = path_;
ReplaceSubstringsAfterOffset(&path_escaped_, 0, "\\", "\\\\");
ReplaceSubstringsAfterOffset(&path_escaped_, 0, "?", "\\?");
}
if (!MatchPattern(test.PathForRequest(), path_escaped_))
return false;
return true;
}
std::string URLPattern::GetAsString() const {
std::string spec = scheme_ + chrome::kStandardSchemeSeparator;
if (match_subdomains_) {
spec += "*";
if (!host_.empty())
spec += ".";
}
if (!host_.empty())
spec += host_;
if (!path_.empty())
spec += path_;
return spec;
}
|
