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
|
/*
* Copyright (C) 2016 Canon Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following disclaimer
* in the documentation and/or other materials provided with the
* distribution.
* * Neither the name of Canon Inc. nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "CrossOriginPreflightChecker.h"
#include "CachedRawResource.h"
#include "CachedResourceLoader.h"
#include "CachedResourceRequest.h"
#include "ContentSecurityPolicy.h"
#include "CrossOriginAccessControl.h"
#include "CrossOriginPreflightResultCache.h"
#include "DocumentThreadableLoader.h"
#include "InspectorInstrumentation.h"
#include "RuntimeEnabledFeatures.h"
namespace WebCore {
CrossOriginPreflightChecker::CrossOriginPreflightChecker(DocumentThreadableLoader& loader, ResourceRequest&& request)
: m_loader(loader)
, m_request(WTFMove(request))
{
}
CrossOriginPreflightChecker::~CrossOriginPreflightChecker()
{
if (m_resource)
m_resource->removeClient(*this);
}
void CrossOriginPreflightChecker::validatePreflightResponse(DocumentThreadableLoader& loader, ResourceRequest&& request, unsigned long identifier, const ResourceResponse& response)
{
Frame* frame = loader.document().frame();
ASSERT(frame);
if (!response.isSuccessful()) {
loader.preflightFailure(identifier, ResourceError(errorDomainWebKitInternal, 0, request.url(), ASCIILiteral("Preflight response is not successful"), ResourceError::Type::AccessControl));
return;
}
String description;
if (!passesAccessControlCheck(response, loader.options().allowCredentials, loader.securityOrigin(), description)) {
loader.preflightFailure(identifier, ResourceError(errorDomainWebKitInternal, 0, request.url(), description, ResourceError::Type::AccessControl));
return;
}
auto result = std::make_unique<CrossOriginPreflightResultCacheItem>(loader.options().allowCredentials);
if (!result->parse(response, description)
|| !result->allowsCrossOriginMethod(request.httpMethod(), description)
|| !result->allowsCrossOriginHeaders(request.httpHeaderFields(), description)) {
loader.preflightFailure(identifier, ResourceError(errorDomainWebKitInternal, 0, request.url(), description, ResourceError::Type::AccessControl));
return;
}
// FIXME: <https://webkit.org/b/164889> Web Inspector: Show Preflight Request information in inspector
// This is only showing success preflight requests and responses but we should show network events
// for preflight failures and distinguish them better from non-preflight requests.
InspectorInstrumentation::didReceiveResourceResponse(*frame, identifier, frame->loader().documentLoader(), response, nullptr);
InspectorInstrumentation::didFinishLoading(frame, frame->loader().documentLoader(), identifier, 0);
CrossOriginPreflightResultCache::singleton().appendEntry(loader.securityOrigin().toString(), request.url(), WTFMove(result));
loader.preflightSuccess(WTFMove(request));
}
void CrossOriginPreflightChecker::notifyFinished(CachedResource& resource)
{
ASSERT_UNUSED(resource, &resource == m_resource);
if (m_resource->loadFailedOrCanceled()) {
ResourceError preflightError = m_resource->resourceError();
// If the preflight was cancelled by underlying code, it probably means the request was blocked due to some access control policy.
// FIXME:: According fetch, we should just pass the error to the layer above. But this may impact some clients like XHR or EventSource.
if (preflightError.isNull() || preflightError.isCancellation() || preflightError.isGeneral())
preflightError.setType(ResourceError::Type::AccessControl);
m_loader.preflightFailure(m_resource->identifier(), preflightError);
return;
}
validatePreflightResponse(m_loader, WTFMove(m_request), m_resource->identifier(), m_resource->response());
}
void CrossOriginPreflightChecker::startPreflight()
{
ResourceLoaderOptions options;
options.referrerPolicy = m_loader.options().referrerPolicy;
options.redirect = FetchOptions::Redirect::Manual;
options.contentSecurityPolicyImposition = ContentSecurityPolicyImposition::SkipPolicyCheck;
CachedResourceRequest preflightRequest(createAccessControlPreflightRequest(m_request, m_loader.securityOrigin(), m_loader.referrer()), options);
if (RuntimeEnabledFeatures::sharedFeatures().resourceTimingEnabled())
preflightRequest.setInitiator(m_loader.options().initiator);
ASSERT(!m_resource);
m_resource = m_loader.document().cachedResourceLoader().requestRawResource(WTFMove(preflightRequest));
if (m_resource)
m_resource->addClient(*this);
}
void CrossOriginPreflightChecker::doPreflight(DocumentThreadableLoader& loader, ResourceRequest&& request)
{
if (!loader.document().frame())
return;
ResourceRequest preflightRequest = createAccessControlPreflightRequest(request, loader.securityOrigin(), loader.referrer());
ResourceError error;
ResourceResponse response;
RefPtr<SharedBuffer> data;
unsigned identifier = loader.document().frame()->loader().loadResourceSynchronously(preflightRequest, DoNotAllowStoredCredentials, ClientCredentialPolicy::CannotAskClientForCredentials, error, response, data);
if (!error.isNull()) {
// If the preflight was cancelled by underlying code, it probably means the request was blocked due to some access control policy.
// FIXME:: According fetch, we should just pass the error to the layer above. But this may impact some clients like XHR or EventSource.
if (error.isCancellation() || error.isGeneral())
error.setType(ResourceError::Type::AccessControl);
loader.preflightFailure(identifier, error);
return;
}
// FIXME: Ideally, we should ask platformLoadResourceSynchronously to set ResourceResponse isRedirected and use it here.
bool isRedirect = preflightRequest.url().strippedForUseAsReferrer() != response.url().strippedForUseAsReferrer();
if (isRedirect || !response.isSuccessful()) {
loader.preflightFailure(identifier, ResourceError(errorDomainWebKitInternal, 0, request.url(), ASCIILiteral("Preflight response is not successful"), ResourceError::Type::AccessControl));
return;
}
validatePreflightResponse(loader, WTFMove(request), identifier, response);
}
void CrossOriginPreflightChecker::setDefersLoading(bool value)
{
if (m_resource)
m_resource->setDefersLoading(value);
}
bool CrossOriginPreflightChecker::isXMLHttpRequest() const
{
return m_loader.isXMLHttpRequest();
}
} // namespace WebCore
|
