moved to https://codereview.chromium.org/399543002/

Source/modules/serviceworkers/FetchManager.cpp

 // Copyright 2014 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.
 
 #include "config.h"
 #include "FetchManager.h"
 
+#include "bindings/core/v8/ExceptionState.h"
 #include "bindings/core/v8/ScriptPromiseResolver.h"
 #include "bindings/core/v8/ScriptState.h"
 #include "bindings/core/v8/V8ThrowException.h"
 #include "core/dom/ExceptionCode.h"
 #include "core/fileapi/Blob.h"
 #include "core/loader/ThreadableLoader.h"
 #include "core/loader/ThreadableLoaderClient.h"
 #include "core/xml/XMLHttpRequest.h"
 #include "modules/serviceworkers/Response.h"
 #include "modules/serviceworkers/ResponseInit.h"
 #include "platform/network/ResourceRequest.h"
+#include "platform/weborigin/SecurityOrigin.h"
+#include "public/platform/WebServiceWorkerRequest.h"
 #include "wtf/HashSet.h"
 
 namespace WebCore {
 
 class FetchManager::Loader : public ThreadableLoaderClient {
 public:
-    Loader(ExecutionContext*, FetchManager*, PassRefPtr<ScriptPromiseResolver>, PassOwnPtr<ResourceRequest>);
+    Loader(ExecutionContext*, FetchManager*, PassRefPtr<ScriptPromiseResolver>, PassRefPtr<FetchRequestData>);
     ~Loader();
     virtual void didReceiveResponse(unsigned long, const ResourceResponse&);
     virtual void didFinishLoading(unsigned long, double);
     virtual void didFail(const ResourceError&);
     virtual void didFailAccessControlCheck(const ResourceError&);
     virtual void didFailRedirectCheck();
     virtual void didDownloadData(int);
 
     void start();
     void cleanup();
 
 private:
+    void performBasicFetch();
+    void performNetworkError();
+    void performeHTTPFetch(bool, bool);
     void failed();
     void notifyFinished();
 
     ExecutionContext* m_executionContext;
     FetchManager* m_fetchManager;
     RefPtr<ScriptPromiseResolver> m_resolver;
-    OwnPtr<ResourceRequest> m_request;
+    RefPtr<FetchRequestData> m_request;
     RefPtr<ThreadableLoader> m_loader;
     ResourceResponse m_response;
     long long m_downloadedBlobLength;
     bool m_failed;
 };
 
-FetchManager::Loader::Loader(ExecutionContext* executionContext, FetchManager* fetchManager, PassRefPtr<ScriptPromiseResolver> resolver, PassOwnPtr<ResourceRequest> request)
+FetchManager::Loader::Loader(ExecutionContext* executionContext, FetchManager* fetchManager, PassRefPtr<ScriptPromiseResolver> resolver, PassRefPtr<FetchRequestData> request)
     : m_executionContext(executionContext)
     , m_fetchManager(fetchManager)
     , m_resolver(resolver)
     , m_request(request)
     , m_downloadedBlobLength(0)
     , m_failed(false)
 {
 }
 
 FetchManager::Loader::~Loader()
 {
     if (m_loader)
         m_loader->cancel();
 }
 
 void FetchManager::Loader::didReceiveResponse(unsigned long, const ResourceResponse& response)
 {
     m_response = response;
 }
 
 void FetchManager::Loader::didFinishLoading(unsigned long, double)
 {
     OwnPtr<BlobData> blobData = BlobData::create();
     String filePath = m_response.downloadedFilePath();
     if (!filePath.isEmpty() && m_downloadedBlobLength) {
         blobData->appendFile(filePath);
         // FIXME: Set the ContentType correctly.
     }
-    ResponseInit responseInit;
-    // FIXME: We may have to filter the status when we support CORS.
-    // http://fetch.spec.whatwg.org/#concept-filtered-response-opaque
-    responseInit.status = m_response.httpStatusCode();
-    responseInit.statusText = m_response.httpStatusText();
-    // FIXME: fill options.
-    RefPtrWillBeRawPtr<Blob> blob = Blob::create(BlobDataHandle::create(blobData.release(), m_downloadedBlobLength));
-    // FIXME: Handle response status correctly.
-    m_resolver->resolve(Response::create(blob.get(), responseInit));
+    RefPtr<FetchResponseData> response(FetchResponseData::create());
+    response->setStatus(m_response.httpStatusCode());
+    response->setStatusMessage(m_response.httpStatusText());
+    HTTPHeaderMap::const_iterator end = m_response.httpHeaderFields().end();
+    for (HTTPHeaderMap::const_iterator it = m_response.httpHeaderFields().begin(); it != end; ++it) {
+        response->headerList()->append(it->key, it->value);
+    }
+    response->setBlobDataHandle(BlobDataHandle::create(blobData.release(), m_downloadedBlobLength));
+    response->setURL(m_request->url());
+
+    switch (m_request->tainting()) {
+    case FetchRequestData::BasicTainting:
+        response = response->createBasicFilteredResponse();
+        break;
+    case FetchRequestData::CORSTainting:
+        response = response->createCORSFilteredResponse();
+        break;
+    case FetchRequestData::OpaqueTainting:
+        response = response->createOpaqueFilteredResponse();
+        break;
+    }
+    m_resolver->resolve(Response::create(response.release()));
     notifyFinished();
 }
 
 void FetchManager::Loader::didFail(const ResourceError& error)
 {
     failed();
 }
 
 void FetchManager::Loader::didFailAccessControlCheck(const ResourceError& error)
 {
     failed();
 }
 
 void FetchManager::Loader::didFailRedirectCheck()
 {
     failed();
 }
 
 void FetchManager::Loader::didDownloadData(int dataLength)
 {
     m_downloadedBlobLength += dataLength;
 }
 
 void FetchManager::Loader::start()
 {
-    m_request->setDownloadToFile(true);
-    ThreadableLoaderOptions options;
-    // FIXME: Fill options.
-    ResourceLoaderOptions resourceLoaderOptions;
-    resourceLoaderOptions.dataBufferingPolicy = DoNotBufferData;
-    // FIXME: Fill resourceLoaderOptions.
-    m_loader = ThreadableLoader::create(*m_executionContext, this, *m_request, options, resourceLoaderOptions);
+
+    // FIXME: 1. If request's url contains a Known HSTS Host, modify it per the requirements of the "URI [sic] Loading and Port Mapping" chapter of HTTP Strict Transport Security. [HSTS]
+
+    // FIXME: 2. If request's referrer is not none, set request's referrer to the result of invoking determine request's referrer. [REFERRER]
+
+    // FIXME: 3. If request's synchronous flag is unset and fetch is not invoked recursively, run the remaining steps asynchronously.
+
+    // FIXME: 4. Let response be the value corresponding to the first matching statement:
+    // - should fetching request be blocked as mixed content returns blocked [MIX]
+    // - should fetching request be blocked as content security returns blocked [CSP]
+    //     A network error.
+
+    // - request's url's origin is request's origin and the CORS flag is unset
+    // - request's url's scheme is "data" and request's same-origin data URL flag is set
+    // - request's url's scheme is "about"
+    if ((m_request->mode() != FetchRequestData::CORSMode
+        && m_request->mode() != FetchRequestData::CORSWithForcedPreflight
+        && SecurityOrigin::create(m_request->url())->isSameSchemeHostPort(m_request->origin().get()))
+        || (m_request->url().protocol() == "data" && m_request->sameOriginDataURLFlag())
+        || (m_request->url().protocol() == "about")) {
+        // The result of performing a basic fetch using request.
+        performBasicFetch();
+        return;
+    }
+
+    // - request's mode is same-origin
+    if (m_request->mode() == FetchRequestData::SameOriginMode) {
+        // A network error.
+        performNetworkError();
+        return;
+    }
+
+    // - request's mode is no CORS
+    if (m_request->mode() == FetchRequestData::NoCORSMode) {
+        // Set request's response tainting to opaque.
+        m_request->setResponseTainting(FetchRequestData::OpaqueTainting);
+        // The result of performing a basic fetch using request.
+        performBasicFetch();
+        return;
+    }
+
+    // - request's url's scheme is not one of "http" and "https"
+    if (m_request->url().protocol() != "http" && m_request->url().protocol() != "https") {
+        // A network error.
+        performNetworkError();
+        return;
+    }
+
+    // - request's mode is CORS-with-forced-preflight
+    if (m_request->mode() == FetchRequestData::CORSWithForcedPreflight) {
+        // Set request's response tainting to CORS.
+        m_request->setResponseTainting(FetchRequestData::CORSTainting);
+        // The result of performing an HTTP fetch using request with the CORS flag and CORS preflight flag set.
+        performeHTTPFetch(true, true);
+        return;
+    }
+
+    // - request's unsafe request flag is set and either request's method is not a simple method or a header in request's header list is not a simple header
+    if (m_request->unsafeRequestFlag()
+        && (!isSimpleMethod(m_request->method())
+            || m_request->headerList()->containsNonSimpleHeader())) {
+        // Set request's response tainting to CORS.
+        m_request->setResponseTainting(FetchRequestData::CORSTainting);
+        // The result of performing an HTTP fetch using request with the CORS flag and CORS preflight flag set.
+        performeHTTPFetch(true, true);
+        return;
+    }
+
+    // - Otherwise
+    //     Set request's response tainting to CORS.
+    m_request->setResponseTainting(FetchRequestData::CORSTainting);
+    //     The result of performing an HTTP fetch using request with the CORS flag set.
+    performeHTTPFetch(true, false);
 }
 
 void FetchManager::Loader::cleanup()
 {
     // Prevent notification
     m_fetchManager = 0;
 
     if (m_loader) {
         m_loader->cancel();
         m_loader.clear();
     }
 }
 
+void FetchManager::Loader::performBasicFetch()
+{
+    // To perform a basic fetch using request, switch on request's url's scheme, and run the associated steps:
+    String protocol(m_request->url().protocol());
+    if (protocol == "about") {
+        // If request's url's scheme data is "blank", return a response whose
+        // header list consist of a single header whose name is `Content-Type`
+        // and value is `text/html;charset=utf-8`, and body is the empty byte
+        // sequence.
+        // FIXME: implement this.
+        performNetworkError();
+    } else if (protocol == "blob") {
+        // It has been argued this should be handled outside of fetching.
+        performNetworkError();
+    } else if (protocol == "data") {
+        // If request's method is `GET` and obtaining a resource from request's
+        // url does not return failure, return a response whose header list
+        // consist of a single header whose name is `Content-Type` and value is
+        // the MIME type and parameters returned from obtaining a resource, and
+        // body is the data returned from obtaining a resource. [DATAURL]
+        // Otherwise, return a network error.
+        // FIXME: implement this.
+        performNetworkError();
+    } else if (protocol == "file" || protocol == "ftp") {
+        // For now, unfortunate as it is, file and ftp URLs are left as an
+        // exercise for the reader.
+        // When in doubt, return a network error.
+        performNetworkError();
+    } else if (protocol == "http" || protocol == "https") {
+        // Return the result of performing an HTTP fetch using request.
+        performeHTTPFetch(false, false);
+    } else {
+        // Return a network error.
+        performNetworkError();
+    }
+}
+
+void FetchManager::Loader::performNetworkError()
+{
+    failed();
+}
+
+void FetchManager::Loader::performeHTTPFetch(bool CORSFlag, bool CORSPreflightFlag)
+{
+    ResourceRequest request(m_request->url());
+    request.setDownloadToFile(true);
+    request.setHTTPMethod(m_request->method());
+
+    // Append `Referer`/empty byte sequence, if HTTPRequest's referrer is none,
+    // and `Referer`/HTTPRequest's referrer, serialized and utf-8 encoded,
+    // otherwise, to HTTPRequest's header list.
+    // FIXME: Support Referer.
+    const Vector<OwnPtr<FetchHeaderList::Header> >& list = m_request->headerList()->list();
+    for (size_t i = 0; i < list.size(); ++i) {
+        request.addHTTPHeaderField(AtomicString(list[i]->first), AtomicString(list[i]->second));
+    }
+
+
+    ThreadableLoaderOptions threadableLoaderOptions;
+    if (CORSPreflightFlag)
+        threadableLoaderOptions.preflightPolicy = ForcePreflight;
+    if (CORSFlag)
+        threadableLoaderOptions.crossOriginRequestPolicy = UseAccessControl;
+    else
+        threadableLoaderOptions.crossOriginRequestPolicy = AllowCrossOriginRequests;
+
+    ResourceLoaderOptions resourceLoaderOptions;
+    resourceLoaderOptions.dataBufferingPolicy = DoNotBufferData;
+    // Let credentials flag be set if either HTTPRequest's credentials mode is include,
+    // or HTTPRequest's credentials mode is same-origin and the CORS flag is unset,
+    // and unset otherwise.
+    if (m_request->credentials() == FetchRequestData::IncludeCredentials
+        || (m_request->credentials() == FetchRequestData::SameOriginCredentials && !CORSFlag)) {
+        resourceLoaderOptions.allowCredentials = AllowStoredCredentials;
+    }
+    if (m_request->credentials() == FetchRequestData::IncludeCredentials)
+        resourceLoaderOptions.credentialsRequested = ClientRequestedCredentials;
+
+    m_loader = ThreadableLoader::create(*m_executionContext, this, request, threadableLoaderOptions, resourceLoaderOptions);
+}
+
 void FetchManager::Loader::failed()
 {
     if (m_failed)
         return;
     m_failed = true;
     ScriptState* state = m_resolver->scriptState();
     ScriptState::Scope scope(state);
     m_resolver->reject(V8ThrowException::createTypeError("Failed to fetch", state->isolate()));
     notifyFinished();
 }
 
 void FetchManager::Loader::notifyFinished()
 {
     if (m_fetchManager)
         m_fetchManager->onLoaderFinished(this);
 }
 
 FetchManager::FetchManager(ExecutionContext* executionContext)
     : m_executionContext(executionContext)
 {
 }
 
 FetchManager::~FetchManager()
 {
     for (HashSet<OwnPtr<Loader> >::iterator it = m_loaders.begin(); it != m_loaders.end(); ++it) {
         (*it)->cleanup();
     }
 }
 
-ScriptPromise FetchManager::fetch(ScriptState* scriptState, PassOwnPtr<ResourceRequest> request)
+ScriptPromise FetchManager::fetch(ScriptState* scriptState, PassRefPtr<FetchRequestData> request)
 {
     RefPtr<ScriptPromiseResolver> resolver = ScriptPromiseResolver::create(scriptState);
     ScriptPromise promise = resolver->promise();
 
-    OwnPtr<Loader> loader(adoptPtr(new Loader(m_executionContext, this, resolver.release(), request)));
-    (*m_loaders.add(loader.release()).storedValue)->start();
+    OwnPtr<Loader> ownLoader(adoptPtr(new Loader(m_executionContext, this, resolver.release(), request)));
+    Loader* loader = m_loaders.add(ownLoader.release()).storedValue->get();
+    loader->start();
     return promise;
 }
 
+bool FetchManager::isSimpleMethod(const String& method)
+{
+    // A simple method is a method that is `GET`, `HEAD`, or `POST`.
+    return isOnAccessControlSimpleRequestMethodWhitelist(method);
+}
+
+bool FetchManager::isForbiddenMethod(const String& method)
+{
+    // A forbidden method is a method that is a byte case-insensitive match for one of `CONNECT`, `TRACE`, and `TRACK`.
+    return !XMLHttpRequest::isAllowedHTTPMethod(method);
+}
+
+bool FetchManager::isUsefulMethod(const String& method)
+{
+    // A useful method is a method that is not a forbidden method.
+    // A forbidden method is a method that is a byte case-insensitive match for one of `CONNECT`, `TRACE`, and `TRACK`.
+    return XMLHttpRequest::isAllowedHTTPMethod(method);
+}
+
 void FetchManager::onLoaderFinished(Loader* loader)
 {
     m_loaders.remove(loader);
 }
 
 bool FetchManager::isSimpleMethod(const String& method)
 {
     // "A simple method is a method that is `GET`, `HEAD`, or `POST`."
     return isOnAccessControlSimpleRequestMethodWhitelist(method);
 }
 
 bool FetchManager::isForbiddenMethod(const String& method)
 {
     // "A forbidden method is a method that is a byte case-insensitive match for one of `CONNECT`, `TRACE`, and `TRACK`."
     return !XMLHttpRequest::isAllowedHTTPMethod(method);
 }
 
 bool FetchManager::isUsefulMethod(const String& method)
 {
     // "A useful method is a method that is not a forbidden method."
     // "A forbidden method is a method that is a byte case-insensitive match for one of `CONNECT`, `TRACE`, and `TRACK`."
     return XMLHttpRequest::isAllowedHTTPMethod(method);
 }
 
 } // namespace WebCore