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32 #include "web/AssociatedURLLoader.h"
34 #include "core/fetch/CrossOriginAccessControl.h"
35 #include "core/fetch/FetchUtils.h"
36 #include "core/loader/DocumentThreadableLoader.h"
37 #include "core/loader/DocumentThreadableLoaderClient.h"
38 #include "core/xml/XMLHttpRequest.h"
39 #include "platform/Timer.h"
40 #include "platform/exported/WrappedResourceRequest.h"
41 #include "platform/exported/WrappedResourceResponse.h"
42 #include "platform/network/HTTPParsers.h"
43 #include "platform/network/ResourceError.h"
44 #include "public/platform/WebHTTPHeaderVisitor.h"
45 #include "public/platform/WebString.h"
46 #include "public/platform/WebURLError.h"
47 #include "public/platform/WebURLLoaderClient.h"
48 #include "public/platform/WebURLRequest.h"
49 #include "public/web/WebDataSource.h"
50 #include "web/WebLocalFrameImpl.h"
51 #include "wtf/HashSet.h"
52 #include "wtf/text/WTFString.h"
58 class HTTPRequestHeaderValidator : public WebHTTPHeaderVisitor {
59 WTF_MAKE_NONCOPYABLE(HTTPRequestHeaderValidator);
61 HTTPRequestHeaderValidator() : m_isSafe(true) { }
63 void visitHeader(const WebString& name, const WebString& value);
64 bool isSafe() const { return m_isSafe; }
70 void HTTPRequestHeaderValidator::visitHeader(const WebString& name, const WebString& value)
72 m_isSafe = m_isSafe && isValidHTTPToken(name) && !FetchUtils::isForbiddenHeaderName(name) && isValidHTTPHeaderValue(value);
75 // FIXME: Remove this and use WebCore code that does the same thing.
76 class HTTPResponseHeaderValidator : public WebHTTPHeaderVisitor {
77 WTF_MAKE_NONCOPYABLE(HTTPResponseHeaderValidator);
79 HTTPResponseHeaderValidator(bool usingAccessControl) : m_usingAccessControl(usingAccessControl) { }
81 void visitHeader(const WebString& name, const WebString& value);
82 const HTTPHeaderSet& blockedHeaders();
85 HTTPHeaderSet m_exposedHeaders;
86 HTTPHeaderSet m_blockedHeaders;
87 bool m_usingAccessControl;
90 void HTTPResponseHeaderValidator::visitHeader(const WebString& name, const WebString& value)
92 String headerName(name);
93 if (m_usingAccessControl) {
94 if (equalIgnoringCase(headerName, "access-control-expose-headers"))
95 parseAccessControlExposeHeadersAllowList(value, m_exposedHeaders);
96 else if (!isOnAccessControlResponseHeaderWhitelist(headerName))
97 m_blockedHeaders.add(name);
101 const HTTPHeaderSet& HTTPResponseHeaderValidator::blockedHeaders()
103 // Remove exposed headers from the blocked set.
104 if (!m_exposedHeaders.isEmpty()) {
105 // Don't allow Set-Cookie headers to be exposed.
106 m_exposedHeaders.remove("set-cookie");
107 m_exposedHeaders.remove("set-cookie2");
108 // Block Access-Control-Expose-Header itself. It could be exposed later.
109 m_blockedHeaders.add("access-control-expose-headers");
110 m_blockedHeaders.removeAll(m_exposedHeaders);
113 return m_blockedHeaders;
118 // This class bridges the interface differences between WebCore and WebKit loader clients.
119 // It forwards its ThreadableLoaderClient notifications to a WebURLLoaderClient.
120 class AssociatedURLLoader::ClientAdapter FINAL : public DocumentThreadableLoaderClient {
121 WTF_MAKE_NONCOPYABLE(ClientAdapter);
123 static PassOwnPtr<ClientAdapter> create(AssociatedURLLoader*, WebURLLoaderClient*, const WebURLLoaderOptions&);
125 virtual void didSendData(unsigned long long /*bytesSent*/, unsigned long long /*totalBytesToBeSent*/) OVERRIDE;
126 virtual void willSendRequest(ResourceRequest& /*newRequest*/, const ResourceResponse& /*redirectResponse*/) OVERRIDE;
128 virtual void didReceiveResponse(unsigned long, const ResourceResponse&) OVERRIDE;
129 virtual void didDownloadData(int /*dataLength*/) OVERRIDE;
130 virtual void didReceiveData(const char*, int /*dataLength*/) OVERRIDE;
131 virtual void didReceiveCachedMetadata(const char*, int /*dataLength*/) OVERRIDE;
132 virtual void didFinishLoading(unsigned long /*identifier*/, double /*finishTime*/) OVERRIDE;
133 virtual void didFail(const ResourceError&) OVERRIDE;
134 virtual void didFailRedirectCheck() OVERRIDE;
136 // Sets an error to be reported back to the client, asychronously.
137 void setDelayedError(const ResourceError&);
139 // Enables forwarding of error notifications to the WebURLLoaderClient. These must be
140 // deferred until after the call to AssociatedURLLoader::loadAsynchronously() completes.
141 void enableErrorNotifications();
143 // Stops loading and releases the DocumentThreadableLoader as early as possible.
144 void clearClient() { m_client = 0; }
147 ClientAdapter(AssociatedURLLoader*, WebURLLoaderClient*, const WebURLLoaderOptions&);
149 void notifyError(Timer<ClientAdapter>*);
151 AssociatedURLLoader* m_loader;
152 WebURLLoaderClient* m_client;
153 WebURLLoaderOptions m_options;
156 Timer<ClientAdapter> m_errorTimer;
157 bool m_enableErrorNotifications;
161 PassOwnPtr<AssociatedURLLoader::ClientAdapter> AssociatedURLLoader::ClientAdapter::create(AssociatedURLLoader* loader, WebURLLoaderClient* client, const WebURLLoaderOptions& options)
163 return adoptPtr(new ClientAdapter(loader, client, options));
166 AssociatedURLLoader::ClientAdapter::ClientAdapter(AssociatedURLLoader* loader, WebURLLoaderClient* client, const WebURLLoaderOptions& options)
170 , m_errorTimer(this, &ClientAdapter::notifyError)
171 , m_enableErrorNotifications(false)
178 void AssociatedURLLoader::ClientAdapter::willSendRequest(ResourceRequest& newRequest, const ResourceResponse& redirectResponse)
183 WrappedResourceRequest wrappedNewRequest(newRequest);
184 WrappedResourceResponse wrappedRedirectResponse(redirectResponse);
185 m_client->willSendRequest(m_loader, wrappedNewRequest, wrappedRedirectResponse);
188 void AssociatedURLLoader::ClientAdapter::didSendData(unsigned long long bytesSent, unsigned long long totalBytesToBeSent)
193 m_client->didSendData(m_loader, bytesSent, totalBytesToBeSent);
196 void AssociatedURLLoader::ClientAdapter::didReceiveResponse(unsigned long, const ResourceResponse& response)
201 // Try to use the original ResourceResponse if possible.
202 WebURLResponse validatedResponse = WrappedResourceResponse(response);
203 HTTPResponseHeaderValidator validator(m_options.crossOriginRequestPolicy == WebURLLoaderOptions::CrossOriginRequestPolicyUseAccessControl);
204 if (!m_options.exposeAllResponseHeaders)
205 validatedResponse.visitHTTPHeaderFields(&validator);
207 // If there are blocked headers, copy the response so we can remove them.
208 const HTTPHeaderSet& blockedHeaders = validator.blockedHeaders();
209 if (!blockedHeaders.isEmpty()) {
210 validatedResponse = WebURLResponse(validatedResponse);
211 HTTPHeaderSet::const_iterator end = blockedHeaders.end();
212 for (HTTPHeaderSet::const_iterator it = blockedHeaders.begin(); it != end; ++it)
213 validatedResponse.clearHTTPHeaderField(*it);
215 m_client->didReceiveResponse(m_loader, validatedResponse);
218 void AssociatedURLLoader::ClientAdapter::didDownloadData(int dataLength)
223 m_client->didDownloadData(m_loader, dataLength, -1);
226 void AssociatedURLLoader::ClientAdapter::didReceiveData(const char* data, int dataLength)
231 m_client->didReceiveData(m_loader, data, dataLength, -1);
234 void AssociatedURLLoader::ClientAdapter::didReceiveCachedMetadata(const char* data, int dataLength)
239 m_client->didReceiveCachedMetadata(m_loader, data, dataLength);
242 void AssociatedURLLoader::ClientAdapter::didFinishLoading(unsigned long identifier, double finishTime)
247 m_client->didFinishLoading(m_loader, finishTime, WebURLLoaderClient::kUnknownEncodedDataLength);
250 void AssociatedURLLoader::ClientAdapter::didFail(const ResourceError& error)
256 m_error = WebURLError(error);
257 if (m_enableErrorNotifications)
258 notifyError(&m_errorTimer);
261 void AssociatedURLLoader::ClientAdapter::didFailRedirectCheck()
266 void AssociatedURLLoader::ClientAdapter::setDelayedError(const ResourceError& error)
271 void AssociatedURLLoader::ClientAdapter::enableErrorNotifications()
273 m_enableErrorNotifications = true;
274 // If an error has already been received, start a timer to report it to the client
275 // after AssociatedURLLoader::loadAsynchronously has returned to the caller.
277 m_errorTimer.startOneShot(0, FROM_HERE);
280 void AssociatedURLLoader::ClientAdapter::notifyError(Timer<ClientAdapter>* timer)
282 ASSERT_UNUSED(timer, timer == &m_errorTimer);
284 m_client->didFail(m_loader, m_error);
287 AssociatedURLLoader::AssociatedURLLoader(PassRefPtr<WebLocalFrameImpl> frameImpl, const WebURLLoaderOptions& options)
288 : m_frameImpl(frameImpl)
295 AssociatedURLLoader::~AssociatedURLLoader()
300 #define COMPILE_ASSERT_MATCHING_ENUM(webkit_name, webcore_name) \
301 COMPILE_ASSERT(static_cast<int>(webkit_name) == static_cast<int>(webcore_name), mismatching_enums)
303 COMPILE_ASSERT_MATCHING_ENUM(WebURLLoaderOptions::CrossOriginRequestPolicyDeny, DenyCrossOriginRequests);
304 COMPILE_ASSERT_MATCHING_ENUM(WebURLLoaderOptions::CrossOriginRequestPolicyUseAccessControl, UseAccessControl);
305 COMPILE_ASSERT_MATCHING_ENUM(WebURLLoaderOptions::CrossOriginRequestPolicyAllow, AllowCrossOriginRequests);
307 COMPILE_ASSERT_MATCHING_ENUM(WebURLLoaderOptions::ConsiderPreflight, ConsiderPreflight);
308 COMPILE_ASSERT_MATCHING_ENUM(WebURLLoaderOptions::ForcePreflight, ForcePreflight);
309 COMPILE_ASSERT_MATCHING_ENUM(WebURLLoaderOptions::PreventPreflight, PreventPreflight);
311 void AssociatedURLLoader::loadSynchronously(const WebURLRequest& request, WebURLResponse& response, WebURLError& error, WebData& data)
313 ASSERT(0); // Synchronous loading is not supported.
316 void AssociatedURLLoader::loadAsynchronously(const WebURLRequest& request, WebURLLoaderClient* client)
323 bool allowLoad = true;
324 WebURLRequest newRequest(request);
325 if (m_options.untrustedHTTP) {
326 WebString method = newRequest.httpMethod();
327 allowLoad = isValidHTTPToken(method) && FetchUtils::isUsefulMethod(method);
329 newRequest.setHTTPMethod(XMLHttpRequest::uppercaseKnownHTTPMethod(method));
330 HTTPRequestHeaderValidator validator;
331 newRequest.visitHTTPHeaderFields(&validator);
332 allowLoad = validator.isSafe();
336 m_clientAdapter = ClientAdapter::create(this, m_client, m_options);
339 ThreadableLoaderOptions options;
340 options.preflightPolicy = static_cast<PreflightPolicy>(m_options.preflightPolicy);
341 options.crossOriginRequestPolicy = static_cast<CrossOriginRequestPolicy>(m_options.crossOriginRequestPolicy);
343 ResourceLoaderOptions resourceLoaderOptions;
344 resourceLoaderOptions.sniffContent = m_options.sniffContent ? SniffContent : DoNotSniffContent;
345 resourceLoaderOptions.allowCredentials = m_options.allowCredentials ? AllowStoredCredentials : DoNotAllowStoredCredentials;
346 resourceLoaderOptions.dataBufferingPolicy = DoNotBufferData;
348 const ResourceRequest& webcoreRequest = newRequest.toResourceRequest();
349 if (webcoreRequest.requestContext() == WebURLRequest::RequestContextUnspecified) {
350 // FIXME: We load URLs without setting a TargetType (and therefore a request context) in several
351 // places in content/ (P2PPortAllocatorSession::AllocateLegacyRelaySession, for example). Remove
352 // this once those places are patched up.
353 newRequest.setRequestContext(WebURLRequest::RequestContextInternal);
356 Document* webcoreDocument = m_frameImpl->frame()->document();
357 ASSERT(webcoreDocument);
358 m_loader = DocumentThreadableLoader::create(*webcoreDocument, m_clientAdapter.get(), webcoreRequest, options, resourceLoaderOptions);
360 // FIXME: return meaningful error codes.
361 m_clientAdapter->setDelayedError(ResourceError());
363 m_clientAdapter->enableErrorNotifications();
366 void AssociatedURLLoader::cancel()
369 m_clientAdapter->clearClient();
374 void AssociatedURLLoader::setDefersLoading(bool defersLoading)
377 m_loader->setDefersLoading(defersLoading);