1 // Copyright 2013 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #include "webkit/common/database/database_identifier.h"
6
7 #include "base/strings/string_number_conversions.h"
8 #include "base/strings/string_util.h"
9 #include "url/url_canon.h"
10
11 namespace webkit_database {
12
13 // static
GetIdentifierFromOrigin(const GURL & origin)14 std::string GetIdentifierFromOrigin(const GURL& origin) {
15 return DatabaseIdentifier::CreateFromOrigin(origin).ToString();
16 }
17
18 // static
GetOriginFromIdentifier(const std::string & identifier)19 GURL GetOriginFromIdentifier(const std::string& identifier) {
20 return DatabaseIdentifier::Parse(identifier).ToOrigin();
21 }
22
SchemeIsUnique(const std::string & scheme)23 static bool SchemeIsUnique(const std::string& scheme) {
24 return scheme == "about" || scheme == "data" || scheme == "javascript";
25 }
26
27 // static
UniqueFileIdentifier()28 const DatabaseIdentifier DatabaseIdentifier::UniqueFileIdentifier() {
29 return DatabaseIdentifier("", "", 0, true, true);
30 }
31
32 // static
CreateFromOrigin(const GURL & origin)33 DatabaseIdentifier DatabaseIdentifier::CreateFromOrigin(const GURL& origin) {
34 if (!origin.is_valid() || origin.is_empty() ||
35 !origin.IsStandard() || SchemeIsUnique(origin.scheme()))
36 return DatabaseIdentifier();
37
38 if (origin.SchemeIsFile())
39 return UniqueFileIdentifier();
40
41 int port = origin.IntPort();
42 if (port == url::PORT_INVALID)
43 return DatabaseIdentifier();
44
45 // We encode the default port for the specified scheme as 0. GURL
46 // canonicalizes this as an unspecified port.
47 if (port == url::PORT_UNSPECIFIED)
48 port = 0;
49
50 return DatabaseIdentifier(origin.scheme(),
51 origin.host(),
52 port,
53 false /* unique */,
54 false /* file */);
55 }
56
57 // static
Parse(const std::string & identifier)58 DatabaseIdentifier DatabaseIdentifier::Parse(const std::string& identifier) {
59 if (!base::IsStringASCII(identifier))
60 return DatabaseIdentifier();
61 if (identifier.find("..") != std::string::npos)
62 return DatabaseIdentifier();
63 char forbidden[] = {'\\', '/', ':' ,'\0'};
64 if (identifier.find_first_of(forbidden, 0, arraysize(forbidden)) !=
65 std::string::npos) {
66 return DatabaseIdentifier();
67 }
68
69 size_t first_underscore = identifier.find_first_of('_');
70 if (first_underscore == std::string::npos || first_underscore == 0)
71 return DatabaseIdentifier();
72
73 size_t last_underscore = identifier.find_last_of('_');
74 if (last_underscore == std::string::npos ||
75 last_underscore == first_underscore ||
76 last_underscore == identifier.length() - 1)
77 return DatabaseIdentifier();
78
79 std::string scheme(identifier.data(), first_underscore);
80 if (scheme == "file")
81 return UniqueFileIdentifier();
82
83 // This magical set of schemes is always treated as unique.
84 if (SchemeIsUnique(scheme))
85 return DatabaseIdentifier();
86
87 base::StringPiece port_str(identifier.begin() + last_underscore + 1,
88 identifier.end());
89 int port = 0;
90 if (!base::StringToInt(port_str, &port) || port < 0 || port >= 1 << 16)
91 return DatabaseIdentifier();
92
93 std::string hostname(identifier.data() + first_underscore + 1,
94 last_underscore - first_underscore - 1);
95 GURL url(scheme + "://" + hostname + "/");
96
97 if (!url.IsStandard())
98 hostname = "";
99
100 // If a url doesn't parse cleanly or doesn't round trip, reject it.
101 if (!url.is_valid() || url.scheme() != scheme || url.host() != hostname)
102 return DatabaseIdentifier();
103
104 return DatabaseIdentifier(scheme, hostname, port, false /* unique */, false);
105 }
106
DatabaseIdentifier()107 DatabaseIdentifier::DatabaseIdentifier()
108 : port_(0),
109 is_unique_(true),
110 is_file_(false) {
111 }
112
DatabaseIdentifier(const std::string & scheme,const std::string & hostname,int port,bool is_unique,bool is_file)113 DatabaseIdentifier::DatabaseIdentifier(const std::string& scheme,
114 const std::string& hostname,
115 int port,
116 bool is_unique,
117 bool is_file)
118 : scheme_(scheme),
119 hostname_(StringToLowerASCII(hostname)),
120 port_(port),
121 is_unique_(is_unique),
122 is_file_(is_file) {
123 }
124
~DatabaseIdentifier()125 DatabaseIdentifier::~DatabaseIdentifier() {}
126
ToString() const127 std::string DatabaseIdentifier::ToString() const {
128 if (is_file_)
129 return "file__0";
130 if (is_unique_)
131 return "__0";
132 return scheme_ + "_" + hostname_ + "_" + base::IntToString(port_);
133 }
134
ToOrigin() const135 GURL DatabaseIdentifier::ToOrigin() const {
136 if (is_file_)
137 return GURL("file:///");
138 if (is_unique_)
139 return GURL();
140 if (port_ == 0)
141 return GURL(scheme_ + "://" + hostname_);
142 return GURL(scheme_ + "://" + hostname_ + ":" + base::IntToString(port_));
143 }
144
145 } // namespace webkit_database
146