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
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
|
// Copyright 2013 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.
#ifdef WIN32
#include <windows.h>
#else
#include <pthread.h>
#endif
#include <algorithm>
#include <ostream>
#include "url/gurl.h"
#include "base/logging.h"
#include "url/url_canon_stdstring.h"
#include "url/url_util.h"
namespace {
static std::string* empty_string = NULL;
static GURL* empty_gurl = NULL;
#ifdef WIN32
// Returns a static reference to an empty string for returning a reference
// when there is no underlying string.
const std::string& EmptyStringForGURL() {
// Avoid static object construction/destruction on startup/shutdown.
if (!empty_string) {
// Create the string. Be careful that we don't break in the case that this
// is being called from multiple threads. Statics are not threadsafe.
std::string* new_empty_string = new std::string;
if (InterlockedCompareExchangePointer(
reinterpret_cast<PVOID*>(&empty_string), new_empty_string, NULL)) {
// The old value was non-NULL, so no replacement was done. Another
// thread did the initialization out from under us.
delete new_empty_string;
}
}
return *empty_string;
}
#else
static pthread_once_t empty_string_once = PTHREAD_ONCE_INIT;
static pthread_once_t empty_gurl_once = PTHREAD_ONCE_INIT;
void EmptyStringForGURLOnce(void) {
empty_string = new std::string;
}
const std::string& EmptyStringForGURL() {
// Avoid static object construction/destruction on startup/shutdown.
pthread_once(&empty_string_once, EmptyStringForGURLOnce);
return *empty_string;
}
#endif // WIN32
} // namespace
GURL::GURL() : is_valid_(false) {
}
GURL::GURL(const GURL& other)
: spec_(other.spec_),
is_valid_(other.is_valid_),
parsed_(other.parsed_) {
if (other.inner_url_)
inner_url_.reset(new GURL(*other.inner_url_));
// Valid filesystem urls should always have an inner_url_.
DCHECK(!is_valid_ || !SchemeIsFileSystem() || inner_url_);
}
GURL::GURL(const std::string& url_string) {
InitCanonical(url_string, true);
}
GURL::GURL(const base::string16& url_string) {
InitCanonical(url_string, true);
}
GURL::GURL(const std::string& url_string, RetainWhiteSpaceSelector) {
InitCanonical(url_string, false);
}
GURL::GURL(const char* canonical_spec, size_t canonical_spec_len,
const url_parse::Parsed& parsed, bool is_valid)
: spec_(canonical_spec, canonical_spec_len),
is_valid_(is_valid),
parsed_(parsed) {
InitializeFromCanonicalSpec();
}
GURL::GURL(std::string canonical_spec,
const url_parse::Parsed& parsed, bool is_valid)
: is_valid_(is_valid),
parsed_(parsed) {
spec_.swap(canonical_spec);
InitializeFromCanonicalSpec();
}
template<typename STR>
void GURL::InitCanonical(const STR& input_spec, bool trim_path_end) {
// Reserve enough room in the output for the input, plus some extra so that
// we have room if we have to escape a few things without reallocating.
spec_.reserve(input_spec.size() + 32);
url_canon::StdStringCanonOutput output(&spec_);
is_valid_ = url_util::Canonicalize(
input_spec.data(), static_cast<int>(input_spec.length()), trim_path_end,
NULL, &output, &parsed_);
output.Complete(); // Must be done before using string.
if (is_valid_ && SchemeIsFileSystem()) {
inner_url_.reset(new GURL(spec_.data(), parsed_.Length(),
*parsed_.inner_parsed(), true));
}
}
void GURL::InitializeFromCanonicalSpec() {
if (is_valid_ && SchemeIsFileSystem()) {
inner_url_.reset(
new GURL(spec_.data(), parsed_.Length(),
*parsed_.inner_parsed(), true));
}
#ifndef NDEBUG
// For testing purposes, check that the parsed canonical URL is identical to
// what we would have produced. Skip checking for invalid URLs have no meaning
// and we can't always canonicalize then reproducabely.
if (is_valid_) {
url_parse::Component scheme;
// We can't do this check on the inner_url of a filesystem URL, as
// canonical_spec actually points to the start of the outer URL, so we'd
// end up with infinite recursion in this constructor.
if (!url_util::FindAndCompareScheme(spec_.data(), spec_.length(),
"filesystem", &scheme) ||
scheme.begin == parsed_.scheme.begin) {
// We need to retain trailing whitespace on path URLs, as the |parsed_|
// spec we originally received may legitimately contain trailing white-
// space on the path or components e.g. if the #ref has been
// removed from a "foo:hello #ref" URL (see http://crbug.com/291747).
GURL test_url(spec_, RETAIN_TRAILING_PATH_WHITEPACE);
DCHECK(test_url.is_valid_ == is_valid_);
DCHECK(test_url.spec_ == spec_);
DCHECK(test_url.parsed_.scheme == parsed_.scheme);
DCHECK(test_url.parsed_.username == parsed_.username);
DCHECK(test_url.parsed_.password == parsed_.password);
DCHECK(test_url.parsed_.host == parsed_.host);
DCHECK(test_url.parsed_.port == parsed_.port);
DCHECK(test_url.parsed_.path == parsed_.path);
DCHECK(test_url.parsed_.query == parsed_.query);
DCHECK(test_url.parsed_.ref == parsed_.ref);
}
}
#endif
}
GURL::~GURL() {
}
GURL& GURL::operator=(GURL other) {
Swap(&other);
return *this;
}
const std::string& GURL::spec() const {
if (is_valid_ || spec_.empty())
return spec_;
DCHECK(false) << "Trying to get the spec of an invalid URL!";
return EmptyStringForGURL();
}
GURL GURL::Resolve(const std::string& relative) const {
return ResolveWithCharsetConverter(relative, NULL);
}
GURL GURL::Resolve(const base::string16& relative) const {
return ResolveWithCharsetConverter(relative, NULL);
}
// Note: code duplicated below (it's inconvenient to use a template here).
GURL GURL::ResolveWithCharsetConverter(
const std::string& relative,
url_canon::CharsetConverter* charset_converter) const {
// Not allowed for invalid URLs.
if (!is_valid_)
return GURL();
GURL result;
// Reserve enough room in the output for the input, plus some extra so that
// we have room if we have to escape a few things without reallocating.
result.spec_.reserve(spec_.size() + 32);
url_canon::StdStringCanonOutput output(&result.spec_);
if (!url_util::ResolveRelative(
spec_.data(), static_cast<int>(spec_.length()), parsed_,
relative.data(), static_cast<int>(relative.length()),
charset_converter, &output, &result.parsed_)) {
// Error resolving, return an empty URL.
return GURL();
}
output.Complete();
result.is_valid_ = true;
if (result.SchemeIsFileSystem()) {
result.inner_url_.reset(
new GURL(result.spec_.data(), result.parsed_.Length(),
*result.parsed_.inner_parsed(), true));
}
return result;
}
// Note: code duplicated above (it's inconvenient to use a template here).
GURL GURL::ResolveWithCharsetConverter(
const base::string16& relative,
url_canon::CharsetConverter* charset_converter) const {
// Not allowed for invalid URLs.
if (!is_valid_)
return GURL();
GURL result;
// Reserve enough room in the output for the input, plus some extra so that
// we have room if we have to escape a few things without reallocating.
result.spec_.reserve(spec_.size() + 32);
url_canon::StdStringCanonOutput output(&result.spec_);
if (!url_util::ResolveRelative(
spec_.data(), static_cast<int>(spec_.length()), parsed_,
relative.data(), static_cast<int>(relative.length()),
charset_converter, &output, &result.parsed_)) {
// Error resolving, return an empty URL.
return GURL();
}
output.Complete();
result.is_valid_ = true;
if (result.SchemeIsFileSystem()) {
result.inner_url_.reset(
new GURL(result.spec_.data(), result.parsed_.Length(),
*result.parsed_.inner_parsed(), true));
}
return result;
}
// Note: code duplicated below (it's inconvenient to use a template here).
GURL GURL::ReplaceComponents(
const url_canon::Replacements<char>& replacements) const {
GURL result;
// Not allowed for invalid URLs.
if (!is_valid_)
return GURL();
// Reserve enough room in the output for the input, plus some extra so that
// we have room if we have to escape a few things without reallocating.
result.spec_.reserve(spec_.size() + 32);
url_canon::StdStringCanonOutput output(&result.spec_);
result.is_valid_ = url_util::ReplaceComponents(
spec_.data(), static_cast<int>(spec_.length()), parsed_, replacements,
NULL, &output, &result.parsed_);
output.Complete();
if (result.is_valid_ && result.SchemeIsFileSystem()) {
result.inner_url_.reset(new GURL(spec_.data(), result.parsed_.Length(),
*result.parsed_.inner_parsed(), true));
}
return result;
}
// Note: code duplicated above (it's inconvenient to use a template here).
GURL GURL::ReplaceComponents(
const url_canon::Replacements<base::char16>& replacements) const {
GURL result;
// Not allowed for invalid URLs.
if (!is_valid_)
return GURL();
// Reserve enough room in the output for the input, plus some extra so that
// we have room if we have to escape a few things without reallocating.
result.spec_.reserve(spec_.size() + 32);
url_canon::StdStringCanonOutput output(&result.spec_);
result.is_valid_ = url_util::ReplaceComponents(
spec_.data(), static_cast<int>(spec_.length()), parsed_, replacements,
NULL, &output, &result.parsed_);
output.Complete();
if (result.is_valid_ && result.SchemeIsFileSystem()) {
result.inner_url_.reset(new GURL(spec_.data(), result.parsed_.Length(),
*result.parsed_.inner_parsed(), true));
}
return result;
}
GURL GURL::GetOrigin() const {
// This doesn't make sense for invalid or nonstandard URLs, so return
// the empty URL
if (!is_valid_ || !IsStandard())
return GURL();
if (SchemeIsFileSystem())
return inner_url_->GetOrigin();
url_canon::Replacements<char> replacements;
replacements.ClearUsername();
replacements.ClearPassword();
replacements.ClearPath();
replacements.ClearQuery();
replacements.ClearRef();
return ReplaceComponents(replacements);
}
GURL GURL::GetWithEmptyPath() const {
// This doesn't make sense for invalid or nonstandard URLs, so return
// the empty URL.
if (!is_valid_ || !IsStandard())
return GURL();
// We could optimize this since we know that the URL is canonical, and we are
// appending a canonical path, so avoiding re-parsing.
GURL other(*this);
if (parsed_.path.len == 0)
return other;
// Clear everything after the path.
other.parsed_.query.reset();
other.parsed_.ref.reset();
// Set the path, since the path is longer than one, we can just set the
// first character and resize.
other.spec_[other.parsed_.path.begin] = '/';
other.parsed_.path.len = 1;
other.spec_.resize(other.parsed_.path.begin + 1);
return other;
}
bool GURL::IsStandard() const {
return url_util::IsStandard(spec_.data(), parsed_.scheme);
}
bool GURL::SchemeIs(const char* lower_ascii_scheme) const {
if (parsed_.scheme.len <= 0)
return lower_ascii_scheme == NULL;
return url_util::LowerCaseEqualsASCII(spec_.data() + parsed_.scheme.begin,
spec_.data() + parsed_.scheme.end(),
lower_ascii_scheme);
}
bool GURL::SchemeIsHTTPOrHTTPS() const {
return SchemeIs("http") || SchemeIs("https");
}
bool GURL::SchemeIsWSOrWSS() const {
return SchemeIs("ws") || SchemeIs("wss");
}
int GURL::IntPort() const {
if (parsed_.port.is_nonempty())
return url_parse::ParsePort(spec_.data(), parsed_.port);
return url_parse::PORT_UNSPECIFIED;
}
int GURL::EffectiveIntPort() const {
int int_port = IntPort();
if (int_port == url_parse::PORT_UNSPECIFIED && IsStandard())
return url_canon::DefaultPortForScheme(spec_.data() + parsed_.scheme.begin,
parsed_.scheme.len);
return int_port;
}
std::string GURL::ExtractFileName() const {
url_parse::Component file_component;
url_parse::ExtractFileName(spec_.data(), parsed_.path, &file_component);
return ComponentString(file_component);
}
std::string GURL::PathForRequest() const {
DCHECK(parsed_.path.len > 0) << "Canonical path for requests should be non-empty";
if (parsed_.ref.len >= 0) {
// Clip off the reference when it exists. The reference starts after the #
// sign, so we have to subtract one to also remove it.
return std::string(spec_, parsed_.path.begin,
parsed_.ref.begin - parsed_.path.begin - 1);
}
// Compute the actual path length, rather than depending on the spec's
// terminator. If we're an inner_url, our spec continues on into our outer
// url's path/query/ref.
int path_len = parsed_.path.len;
if (parsed_.query.is_valid())
path_len = parsed_.query.end() - parsed_.path.begin;
return std::string(spec_, parsed_.path.begin, path_len);
}
std::string GURL::HostNoBrackets() const {
// If host looks like an IPv6 literal, strip the square brackets.
url_parse::Component h(parsed_.host);
if (h.len >= 2 && spec_[h.begin] == '[' && spec_[h.end() - 1] == ']') {
h.begin++;
h.len -= 2;
}
return ComponentString(h);
}
std::string GURL::GetContent() const {
return is_valid_ ? ComponentString(parsed_.GetContent()) : std::string();
}
bool GURL::HostIsIPAddress() const {
if (!is_valid_ || spec_.empty())
return false;
url_canon::RawCanonOutputT<char, 128> ignored_output;
url_canon::CanonHostInfo host_info;
url_canon::CanonicalizeIPAddress(spec_.c_str(), parsed_.host,
&ignored_output, &host_info);
return host_info.IsIPAddress();
}
#ifdef WIN32
const GURL& GURL::EmptyGURL() {
// Avoid static object construction/destruction on startup/shutdown.
if (!empty_gurl) {
// Create the string. Be careful that we don't break in the case that this
// is being called from multiple threads.
GURL* new_empty_gurl = new GURL;
if (InterlockedCompareExchangePointer(
reinterpret_cast<PVOID*>(&empty_gurl), new_empty_gurl, NULL)) {
// The old value was non-NULL, so no replacement was done. Another
// thread did the initialization out from under us.
delete new_empty_gurl;
}
}
return *empty_gurl;
}
#else
void EmptyGURLOnce(void) {
empty_gurl = new GURL;
}
const GURL& GURL::EmptyGURL() {
// Avoid static object construction/destruction on startup/shutdown.
pthread_once(&empty_gurl_once, EmptyGURLOnce);
return *empty_gurl;
}
#endif // WIN32
bool GURL::DomainIs(const char* lower_ascii_domain,
int domain_len) const {
// Return false if this URL is not valid or domain is empty.
if (!is_valid_ || !domain_len)
return false;
// FileSystem URLs have empty parsed_.host, so check this first.
if (SchemeIsFileSystem() && inner_url_)
return inner_url_->DomainIs(lower_ascii_domain, domain_len);
if (!parsed_.host.is_nonempty())
return false;
// Check whether the host name is end with a dot. If yes, treat it
// the same as no-dot unless the input comparison domain is end
// with dot.
const char* last_pos = spec_.data() + parsed_.host.end() - 1;
int host_len = parsed_.host.len;
if ('.' == *last_pos && '.' != lower_ascii_domain[domain_len - 1]) {
last_pos--;
host_len--;
}
// Return false if host's length is less than domain's length.
if (host_len < domain_len)
return false;
// Compare this url whether belong specific domain.
const char* start_pos = spec_.data() + parsed_.host.begin +
host_len - domain_len;
if (!url_util::LowerCaseEqualsASCII(start_pos,
last_pos + 1,
lower_ascii_domain,
lower_ascii_domain + domain_len))
return false;
// Check whether host has right domain start with dot, make sure we got
// right domain range. For example www.google.com has domain
// "google.com" but www.iamnotgoogle.com does not.
if ('.' != lower_ascii_domain[0] && host_len > domain_len &&
'.' != *(start_pos - 1))
return false;
return true;
}
void GURL::Swap(GURL* other) {
spec_.swap(other->spec_);
std::swap(is_valid_, other->is_valid_);
std::swap(parsed_, other->parsed_);
inner_url_.swap(other->inner_url_);
}
std::ostream& operator<<(std::ostream& out, const GURL& url) {
return out << url.possibly_invalid_spec();
}
|