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chromium / chromium / src / 51bcc5d877869f6dada9434067e345d40c8ac0fa / . / url / url_canon_fileurl.cc
blob: 1130a97d12ff8aca6687be544c86c0c4e936c1e7 [file] [log] [blame]
tfarina@chromium.org51bcc5d2013-04-24 01:41:37[diff] [blame^]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.
brettw@chromium.orge7bba5f2013-04-10 20:10:52[diff] [blame]4
5// Functions for canonicalizing "file:" URLs.
6
tfarina@chromium.org318076b2013-04-18 21:19:45[diff] [blame]7#include "url/url_canon.h"
8#include "url/url_canon_internal.h"
9#include "url/url_file.h"
10#include "url/url_parse_internal.h"
brettw@chromium.orge7bba5f2013-04-10 20:10:52[diff] [blame]11
12namespace url_canon {
13
14namespace {
15
16#ifdef WIN32
17
18// Given a pointer into the spec, this copies and canonicalizes the drive
19// letter and colon to the output, if one is found. If there is not a drive
20// spec, it won't do anything. The index of the next character in the input
21// spec is returned (after the colon when a drive spec is found, the begin
22// offset if one is not).
23template<typename CHAR>
24int FileDoDriveSpec(const CHAR* spec, int begin, int end,
25 CanonOutput* output) {
26 // The path could be one of several things: /foo/bar, c:/foo/bar, /c:/foo,
27 // (with backslashes instead of slashes as well).
28 int num_slashes = url_parse::CountConsecutiveSlashes(spec, begin, end);
29 int after_slashes = begin + num_slashes;
30
31 if (!url_parse::DoesBeginWindowsDriveSpec(spec, after_slashes, end))
32 return begin; // Haven't consumed any characters
33
34 // A drive spec is the start of a path, so we need to add a slash for the
35 // authority terminator (typically the third slash).
36 output->push_back('/');
37
38 // DoesBeginWindowsDriveSpec will ensure that the drive letter is valid
39 // and that it is followed by a colon/pipe.
40
41 // Normalize Windows drive letters to uppercase
42 if (spec[after_slashes] >= 'a' && spec[after_slashes] <= 'z')
43 output->push_back(spec[after_slashes] - 'a' + 'A');
44 else
45 output->push_back(static_cast<char>(spec[after_slashes]));
46
47 // Normalize the character following it to a colon rather than pipe.
48 output->push_back(':');
49 return after_slashes + 2;
50}
51
52#endif // WIN32
53
54template<typename CHAR, typename UCHAR>
55bool DoFileCanonicalizePath(const CHAR* spec,
56 const url_parse::Component& path,
57 CanonOutput* output,
58 url_parse::Component* out_path) {
59 // Copies and normalizes the "c:" at the beginning, if present.
60 out_path->begin = output->length();
61 int after_drive;
62#ifdef WIN32
63 after_drive = FileDoDriveSpec(spec, path.begin, path.end(), output);
64#else
65 after_drive = path.begin;
66#endif
67
68 // Copies the rest of the path, starting from the slash following the
69 // drive colon (if any, Windows only), or the first slash of the path.
70 bool success = true;
71 if (after_drive < path.end()) {
72 // Use the regular path canonicalizer to canonicalize the rest of the
73 // path. Give it a fake output component to write into. DoCanonicalizeFile
74 // will compute the full path component.
75 url_parse::Component sub_path =
76 url_parse::MakeRange(after_drive, path.end());
77 url_parse::Component fake_output_path;
78 success = CanonicalizePath(spec, sub_path, output, &fake_output_path);
79 } else {
80 // No input path, canonicalize to a slash.
81 output->push_back('/');
82 }
83
84 out_path->len = output->length() - out_path->begin;
85 return success;
86}
87
88template<typename CHAR, typename UCHAR>
89bool DoCanonicalizeFileURL(const URLComponentSource<CHAR>& source,
90 const url_parse::Parsed& parsed,
91 CharsetConverter* query_converter,
92 CanonOutput* output,
93 url_parse::Parsed* new_parsed) {
94 // Things we don't set in file: URLs.
95 new_parsed->username = url_parse::Component();
96 new_parsed->password = url_parse::Component();
97 new_parsed->port = url_parse::Component();
98
99 // Scheme (known, so we don't bother running it through the more
100 // complicated scheme canonicalizer).
101 new_parsed->scheme.begin = output->length();
102 output->Append("file://", 7);
103 new_parsed->scheme.len = 4;
104
105 // Append the host. For many file URLs, this will be empty. For UNC, this
106 // will be present.
107 // TODO(brettw) This doesn't do any checking for host name validity. We
108 // should probably handle validity checking of UNC hosts differently than
109 // for regular IP hosts.
110 bool success = CanonicalizeHost(source.host, parsed.host,
111 output, &new_parsed->host);
112 success &= DoFileCanonicalizePath<CHAR, UCHAR>(source.path, parsed.path,
113 output, &new_parsed->path);
114 CanonicalizeQuery(source.query, parsed.query, query_converter,
115 output, &new_parsed->query);
116
117 // Ignore failure for refs since the URL can probably still be loaded.
118 CanonicalizeRef(source.ref, parsed.ref, output, &new_parsed->ref);
119
120 return success;
121}
122
123} // namespace
124
125bool CanonicalizeFileURL(const char* spec,
126 int spec_len,
127 const url_parse::Parsed& parsed,
128 CharsetConverter* query_converter,
129 CanonOutput* output,
130 url_parse::Parsed* new_parsed) {
131 return DoCanonicalizeFileURL<char, unsigned char>(
132 URLComponentSource<char>(spec), parsed, query_converter,
133 output, new_parsed);
134}
135
136bool CanonicalizeFileURL(const char16* spec,
137 int spec_len,
138 const url_parse::Parsed& parsed,
139 CharsetConverter* query_converter,
140 CanonOutput* output,
141 url_parse::Parsed* new_parsed) {
142 return DoCanonicalizeFileURL<char16, char16>(
143 URLComponentSource<char16>(spec), parsed, query_converter,
144 output, new_parsed);
145}
146
147bool FileCanonicalizePath(const char* spec,
148 const url_parse::Component& path,
149 CanonOutput* output,
150 url_parse::Component* out_path) {
151 return DoFileCanonicalizePath<char, unsigned char>(spec, path,
152 output, out_path);
153}
154
155bool FileCanonicalizePath(const char16* spec,
156 const url_parse::Component& path,
157 CanonOutput* output,
158 url_parse::Component* out_path) {
159 return DoFileCanonicalizePath<char16, char16>(spec, path,
160 output, out_path);
161}
162
163bool ReplaceFileURL(const char* base,
164 const url_parse::Parsed& base_parsed,
165 const Replacements<char>& replacements,
166 CharsetConverter* query_converter,
167 CanonOutput* output,
168 url_parse::Parsed* new_parsed) {
169 URLComponentSource<char> source(base);
170 url_parse::Parsed parsed(base_parsed);
171 SetupOverrideComponents(base, replacements, &source, &parsed);
172 return DoCanonicalizeFileURL<char, unsigned char>(
173 source, parsed, query_converter, output, new_parsed);
174}
175
176bool ReplaceFileURL(const char* base,
177 const url_parse::Parsed& base_parsed,
178 const Replacements<char16>& replacements,
179 CharsetConverter* query_converter,
180 CanonOutput* output,
181 url_parse::Parsed* new_parsed) {
182 RawCanonOutput<1024> utf8;
183 URLComponentSource<char> source(base);
184 url_parse::Parsed parsed(base_parsed);
185 SetupUTF16OverrideComponents(base, replacements, &utf8, &source, &parsed);
186 return DoCanonicalizeFileURL<char, unsigned char>(
187 source, parsed, query_converter, output, new_parsed);
188}
189
190} // namespace url_canon