Attachment 343295 Details for Bug 186902 – Patch

[patch] Patch

patch (text/plain), 25.73 KB, created by Brady Eidson on 2018-06-21 17:15:07 PDT

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Creator: Brady Eidson

Created: 2018-06-21 17:15:07 PDT

Size: 25.73 KB

patch

obsolete

>diff --git a/Source/WebKit/ChangeLog b/Source/WebKit/ChangeLog
>index 13f3ad7ac87..b6e37e0ee8c 100644
>--- a/Source/WebKit/ChangeLog
>+++ b/Source/WebKit/ChangeLog
>@@ -1,3 +1,49 @@
>+2018-06-21  Brady Eidson  <beidson@apple.com>
>+
>+        WKURLSchemeHandler doesn't handle sync XHR.
>+        <rdar://problem/40955884> and https://bugs.webkit.org/show_bug.cgi?id=186902
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        This patch allows WebProcesses to block on sync loads to a custom scheme,
>+        and teaches WebURLSchemeTasks how to buffer up data and the response if 
>+        operating synchronously.
>+
>+        * Shared/WebErrors.cpp:
>+        (WebKit::failedCustomProtocolSyncLoad):
>+        * Shared/WebErrors.h:
>+
>+        * UIProcess/WebPageProxy.cpp:
>+        (WebKit::WebPageProxy::startURLSchemeTask):
>+        (WebKit::WebPageProxy::loadSynchronousURLSchemeTask):
>+        * UIProcess/WebPageProxy.h:
>+        * UIProcess/WebPageProxy.messages.in:
>+
>+        * UIProcess/WebURLSchemeHandler.cpp:
>+        (WebKit::WebURLSchemeHandler::startTask):
>+        * UIProcess/WebURLSchemeHandler.h:
>+
>+        * UIProcess/WebURLSchemeTask.cpp:
>+        (WebKit::WebURLSchemeTask::create):
>+        (WebKit::WebURLSchemeTask::WebURLSchemeTask):
>+        (WebKit::WebURLSchemeTask::didPerformRedirection):
>+        (WebKit::WebURLSchemeTask::didReceiveResponse):
>+        (WebKit::WebURLSchemeTask::didReceiveData):
>+        (WebKit::WebURLSchemeTask::didComplete):
>+        (WebKit::WebURLSchemeTask::pageDestroyed):
>+        (WebKit::WebURLSchemeTask::stop):
>+        * UIProcess/WebURLSchemeTask.h:
>+        (WebKit::WebURLSchemeTask::isSync const):
>+
>+        * WebProcess/Network/WebLoaderStrategy.cpp:
>+        (WebKit::WebLoaderStrategy::tryLoadingSynchronouslyUsingURLSchemeHandler):
>+        (WebKit::WebLoaderStrategy::loadResourceSynchronously):
>+        * WebProcess/Network/WebLoaderStrategy.h:
>+
>+        * WebProcess/WebPage/WebURLSchemeHandlerProxy.cpp:
>+        (WebKit::WebURLSchemeHandlerProxy::loadSynchronously):
>+        * WebProcess/WebPage/WebURLSchemeHandlerProxy.h:
>+
> 2018-06-19  Wenson Hsieh  <wenson_hsieh@apple.com>
> 
>         [WebKit on watchOS] Vend username text content type when using scribble in login fields
>diff --git a/Source/WebKit/Shared/WebErrors.cpp b/Source/WebKit/Shared/WebErrors.cpp
>index 8f15cd30c5c..b6dc50ceb55 100644
>--- a/Source/WebKit/Shared/WebErrors.cpp
>+++ b/Source/WebKit/Shared/WebErrors.cpp
>@@ -57,6 +57,11 @@ ResourceError interruptedForPolicyChangeError(const ResourceRequest& request)
>     return ResourceError(API::Error::webKitPolicyErrorDomain(), API::Error::Policy::FrameLoadInterruptedByPolicyChange, request.url(), WEB_UI_STRING("Frame load interrupted", "WebKitErrorFrameLoadInterruptedByPolicyChange description"));
> }
> 
>+ResourceError failedCustomProtocolSyncLoad(const ResourceRequest& request)
>+{
>+    return ResourceError(errorDomainWebKitInternal, 0, request.url(), WEB_UI_STRING("Error handling synchronous load with custom protocol", "Custom protocol synchronous load failure description"));
>+}
>+
> #if ENABLE(CONTENT_FILTERING)
> ResourceError blockedByContentFilterError(const ResourceRequest& request)
> {
>diff --git a/Source/WebKit/Shared/WebErrors.h b/Source/WebKit/Shared/WebErrors.h
>index 593ea88537d..27d14e31b31 100644
>--- a/Source/WebKit/Shared/WebErrors.h
>+++ b/Source/WebKit/Shared/WebErrors.h
>@@ -41,6 +41,7 @@ WebCore::ResourceError blockedError(const WebCore::ResourceRequest&);
> WebCore::ResourceError blockedByContentBlockerError(const WebCore::ResourceRequest&);
> WebCore::ResourceError cannotShowURLError(const WebCore::ResourceRequest&);
> WebCore::ResourceError interruptedForPolicyChangeError(const WebCore::ResourceRequest&);
>+WebCore::ResourceError failedCustomProtocolSyncLoad(const WebCore::ResourceRequest&);
> #if ENABLE(CONTENT_FILTERING)
> WebCore::ResourceError blockedByContentFilterError(const WebCore::ResourceRequest&);
> #endif
>diff --git a/Source/WebKit/UIProcess/WebPageProxy.cpp b/Source/WebKit/UIProcess/WebPageProxy.cpp
>index b9af1d6bff9..c444c045744 100644
>--- a/Source/WebKit/UIProcess/WebPageProxy.cpp
>+++ b/Source/WebKit/UIProcess/WebPageProxy.cpp
>@@ -7586,7 +7586,7 @@ void WebPageProxy::startURLSchemeTask(URLSchemeTaskParameters&& parameters)
>     auto iterator = m_urlSchemeHandlersByIdentifier.find(parameters.handlerIdentifier);
>     MESSAGE_CHECK(iterator != m_urlSchemeHandlersByIdentifier.end());
> 
>-    iterator->value->startTask(*this, parameters.taskIdentifier, WTFMove(parameters.request));
>+    iterator->value->startTask(*this, parameters.taskIdentifier, WTFMove(parameters.request), nullptr);
> }
> 
> void WebPageProxy::stopURLSchemeTask(uint64_t handlerIdentifier, uint64_t taskIdentifier)
>@@ -7597,6 +7597,14 @@ void WebPageProxy::stopURLSchemeTask(uint64_t handlerIdentifier, uint64_t taskId
>     iterator->value->stopTask(*this, taskIdentifier);
> }
> 
>+void WebPageProxy::loadSynchronousURLSchemeTask(URLSchemeTaskParameters&& parameters, Messages::WebPageProxy::LoadSynchronousURLSchemeTask::DelayedReply&& reply)
>+{
>+    auto iterator = m_urlSchemeHandlersByIdentifier.find(parameters.handlerIdentifier);
>+    MESSAGE_CHECK(iterator != m_urlSchemeHandlersByIdentifier.end());
>+
>+    iterator->value->startTask(*this, parameters.taskIdentifier, WTFMove(parameters.request), WTFMove(reply));
>+}
>+
> #if HAVE(CFNETWORK_STORAGE_PARTITIONING)
> void WebPageProxy::hasStorageAccess(String&& subFrameHost, String&& topFrameHost, uint64_t frameID, uint64_t webProcessContextId)
> {
>diff --git a/Source/WebKit/UIProcess/WebPageProxy.h b/Source/WebKit/UIProcess/WebPageProxy.h
>index b1050c94097..2ee2adb3146 100644
>--- a/Source/WebKit/UIProcess/WebPageProxy.h
>+++ b/Source/WebKit/UIProcess/WebPageProxy.h
>@@ -1752,6 +1752,7 @@ private:
> 
>     void startURLSchemeTask(URLSchemeTaskParameters&&);
>     void stopURLSchemeTask(uint64_t handlerIdentifier, uint64_t taskIdentifier);
>+    void loadSynchronousURLSchemeTask(URLSchemeTaskParameters&&, Messages::WebPageProxy::LoadSynchronousURLSchemeTask::DelayedReply&&);
> 
>     void handleAutoFillButtonClick(const UserData&);
> 
>diff --git a/Source/WebKit/UIProcess/WebPageProxy.messages.in b/Source/WebKit/UIProcess/WebPageProxy.messages.in
>index 7f3c6683c61..4e1de5ca22a 100644
>--- a/Source/WebKit/UIProcess/WebPageProxy.messages.in
>+++ b/Source/WebKit/UIProcess/WebPageProxy.messages.in
>@@ -513,6 +513,7 @@ messages -> WebPageProxy {
> 
>     StartURLSchemeTask(struct WebKit::URLSchemeTaskParameters parameters)
>     StopURLSchemeTask(uint64_t handlerIdentifier, uint64_t taskIdentifier)
>+    LoadSynchronousURLSchemeTask(struct WebKit::URLSchemeTaskParameters parameters) -> (WebCore::ResourceResponse response, WebCore::ResourceError error, IPC::DataReference data) Delayed
> 
> #if HAVE(CFNETWORK_STORAGE_PARTITIONING)
>     HasStorageAccess(String subFrameHost, String topFrameHost, uint64_t frameID, uint64_t contextID)
>diff --git a/Source/WebKit/UIProcess/WebURLSchemeHandler.cpp b/Source/WebKit/UIProcess/WebURLSchemeHandler.cpp
>index 1f682c1ebe8..dab593fb21f 100644
>--- a/Source/WebKit/UIProcess/WebURLSchemeHandler.cpp
>+++ b/Source/WebKit/UIProcess/WebURLSchemeHandler.cpp
>@@ -49,9 +49,9 @@ WebURLSchemeHandler::~WebURLSchemeHandler()
>     ASSERT(m_tasks.isEmpty());
> }
> 
>-void WebURLSchemeHandler::startTask(WebPageProxy& page, uint64_t taskIdentifier, ResourceRequest&& request)
>+void WebURLSchemeHandler::startTask(WebPageProxy& page, uint64_t taskIdentifier, ResourceRequest&& request, SyncLoadCompletionHandler&& completionHandler)
> {
>-    auto result = m_tasks.add(taskIdentifier, WebURLSchemeTask::create(*this, page, taskIdentifier, WTFMove(request)));
>+    auto result = m_tasks.add(taskIdentifier, WebURLSchemeTask::create(*this, page, taskIdentifier, WTFMove(request), WTFMove(completionHandler)));
>     ASSERT(result.isNewEntry);
> 
>     auto pageEntry = m_tasksByPageIdentifier.add(page.pageID(), HashSet<uint64_t>());
>diff --git a/Source/WebKit/UIProcess/WebURLSchemeHandler.h b/Source/WebKit/UIProcess/WebURLSchemeHandler.h
>index 41f803e0012..a4bfbb1ff09 100644
>--- a/Source/WebKit/UIProcess/WebURLSchemeHandler.h
>+++ b/Source/WebKit/UIProcess/WebURLSchemeHandler.h
>@@ -31,6 +31,10 @@
> #include <wtf/RefCounted.h>
> #include <wtf/RefPtr.h>
> 
>+namespace IPC {
>+class DataReference;
>+}
>+
> namespace WebCore {
> class ResourceRequest;
> }
>@@ -39,6 +43,8 @@ namespace WebKit {
> 
> class WebPageProxy;
> 
>+typedef CompletionHandler<void(const WebCore::ResourceResponse&, const WebCore::ResourceError&, const IPC::DataReference&)> SyncLoadCompletionHandler;
>+
> class WebURLSchemeHandler : public RefCounted<WebURLSchemeHandler> {
>     WTF_MAKE_NONCOPYABLE(WebURLSchemeHandler);
> public:
>@@ -46,7 +52,7 @@ public:
> 
>     uint64_t identifier() const { return m_identifier; }
> 
>-    void startTask(WebPageProxy&, uint64_t taskIdentifier, WebCore::ResourceRequest&&);
>+    void startTask(WebPageProxy&, uint64_t taskIdentifier, WebCore::ResourceRequest&&, SyncLoadCompletionHandler&&);
>     void stopTask(WebPageProxy&, uint64_t taskIdentifier);
>     void stopAllTasksForPage(WebPageProxy&);
>     void taskCompleted(WebURLSchemeTask&);
>@@ -65,6 +71,8 @@ private:
> 
>     HashMap<uint64_t, Ref<WebURLSchemeTask>> m_tasks;
>     HashMap<uint64_t, HashSet<uint64_t>> m_tasksByPageIdentifier;
>+    
>+    SyncLoadCompletionHandler m_syncLoadCompletionHandler;
> 
> }; // class WebURLSchemeHandler
> 
>diff --git a/Source/WebKit/UIProcess/WebURLSchemeTask.cpp b/Source/WebKit/UIProcess/WebURLSchemeTask.cpp
>index 5549488bd84..7b247cca11c 100644
>--- a/Source/WebKit/UIProcess/WebURLSchemeTask.cpp
>+++ b/Source/WebKit/UIProcess/WebURLSchemeTask.cpp
>@@ -27,6 +27,7 @@
> #include "WebURLSchemeTask.h"
> 
> #include "DataReference.h"
>+#include "WebErrors.h"
> #include "WebPageMessages.h"
> #include "WebPageProxy.h"
> #include "WebURLSchemeHandler.h"
>@@ -35,17 +36,18 @@ using namespace WebCore;
> 
> namespace WebKit {
> 
>-Ref<WebURLSchemeTask> WebURLSchemeTask::create(WebURLSchemeHandler& handler, WebPageProxy& page, uint64_t resourceIdentifier, ResourceRequest&& request)
>+Ref<WebURLSchemeTask> WebURLSchemeTask::create(WebURLSchemeHandler& handler, WebPageProxy& page, uint64_t resourceIdentifier, ResourceRequest&& request, SyncLoadCompletionHandler&& syncCompletionHandler)
> {
>-    return adoptRef(*new WebURLSchemeTask(handler, page, resourceIdentifier, WTFMove(request)));
>+    return adoptRef(*new WebURLSchemeTask(handler, page, resourceIdentifier, WTFMove(request), WTFMove(syncCompletionHandler)));
> }
> 
>-WebURLSchemeTask::WebURLSchemeTask(WebURLSchemeHandler& handler, WebPageProxy& page, uint64_t resourceIdentifier, ResourceRequest&& request)
>+WebURLSchemeTask::WebURLSchemeTask(WebURLSchemeHandler& handler, WebPageProxy& page, uint64_t resourceIdentifier, ResourceRequest&& request, SyncLoadCompletionHandler&& syncCompletionHandler)
>     : m_urlSchemeHandler(handler)
>     , m_page(&page)
>     , m_identifier(resourceIdentifier)
>     , m_pageIdentifier(page.pageID())
>     , m_request(WTFMove(request))
>+    , m_syncCompletionHandler(WTFMove(syncCompletionHandler))
> {
> }
> 
>@@ -63,6 +65,9 @@ auto WebURLSchemeTask::didPerformRedirection(WebCore::ResourceResponse&& respons
>     if (m_responseSent)
>         return ExceptionType::RedirectAfterResponse;
>     
>+    if (isSync())
>+        m_syncResponse = response;
>+
>     m_request = request;
>     m_page->send(Messages::WebPage::URLSchemeTaskDidPerformRedirection(m_urlSchemeHandler->identifier(), m_identifier, response, request));
> 
>@@ -83,6 +88,10 @@ auto WebURLSchemeTask::didReceiveResponse(const ResourceResponse& response) -> E
>     m_responseSent = true;
> 
>     response.includeCertificateInfo();
>+
>+    if (isSync())
>+        m_syncResponse = response;
>+
>     m_page->send(Messages::WebPage::URLSchemeTaskDidReceiveResponse(m_urlSchemeHandler->identifier(), m_identifier, response));
>     return ExceptionType::None;
> }
>@@ -99,6 +108,13 @@ auto WebURLSchemeTask::didReceiveData(Ref<SharedBuffer> buffer) -> ExceptionType
>         return ExceptionType::NoResponseSent;
> 
>     m_dataSent = true;
>+
>+    if (isSync()) {
>+        if (!m_syncData)
>+            m_syncData = SharedBuffer::create();
>+        m_syncData->append(buffer);
>+    }
>+
>     m_page->send(Messages::WebPage::URLSchemeTaskDidReceiveData(m_urlSchemeHandler->identifier(), m_identifier, IPC::SharedBufferDataReference(buffer.ptr())));
>     return ExceptionType::None;
> }
>@@ -115,6 +131,12 @@ auto WebURLSchemeTask::didComplete(const ResourceError& error) -> ExceptionType
>         return ExceptionType::NoResponseSent;
> 
>     m_completed = true;
>+    
>+    if (isSync()) {
>+        m_syncCompletionHandler(m_syncResponse, error, IPC::DataReference { (const uint8_t*)m_syncData->data(), m_syncData->size() });
>+        m_syncData = nullptr;
>+    }
>+
>     m_page->send(Messages::WebPage::URLSchemeTaskDidComplete(m_urlSchemeHandler->identifier(), m_identifier, error));
>     m_urlSchemeHandler->taskCompleted(*this);
> 
>@@ -126,12 +148,18 @@ void WebURLSchemeTask::pageDestroyed()
>     ASSERT(m_page);
>     m_page = nullptr;
>     m_stopped = true;
>+    
>+    if (isSync())
>+        m_syncCompletionHandler({ }, failedCustomProtocolSyncLoad(m_request), { });
> }
> 
> void WebURLSchemeTask::stop()
> {
>     ASSERT(!m_stopped);
>     m_stopped = true;
>+
>+    if (isSync())
>+        m_syncCompletionHandler({ }, failedCustomProtocolSyncLoad(m_request), { });
> }
> 
> } // namespace WebKit
>diff --git a/Source/WebKit/UIProcess/WebURLSchemeTask.h b/Source/WebKit/UIProcess/WebURLSchemeTask.h
>index 375474c1fad..ce547c612d6 100644
>--- a/Source/WebKit/UIProcess/WebURLSchemeTask.h
>+++ b/Source/WebKit/UIProcess/WebURLSchemeTask.h
>@@ -26,10 +26,17 @@
> #pragma once
> 
> #include <WebCore/ResourceRequest.h>
>+#include <WebCore/ResourceResponse.h>
>+#include <WebCore/SharedBuffer.h>
>+#include <wtf/CompletionHandler.h>
> #include <wtf/InstanceCounted.h>
> #include <wtf/RefCounted.h>
> #include <wtf/RefPtr.h>
> 
>+namespace IPC {
>+class DataReference;
>+}
>+
> namespace WebCore {
> class ResourceError;
> class ResourceResponse;
>@@ -41,10 +48,12 @@ namespace WebKit {
> class WebURLSchemeHandler;
> class WebPageProxy;
> 
>+typedef CompletionHandler<void(const WebCore::ResourceResponse&, const WebCore::ResourceError&, const IPC::DataReference&)> SyncLoadCompletionHandler;
>+
> class WebURLSchemeTask : public RefCounted<WebURLSchemeTask>, public InstanceCounted<WebURLSchemeTask> {
>     WTF_MAKE_NONCOPYABLE(WebURLSchemeTask);
> public:
>-    static Ref<WebURLSchemeTask> create(WebURLSchemeHandler&, WebPageProxy&, uint64_t identifier, WebCore::ResourceRequest&&);
>+    static Ref<WebURLSchemeTask> create(WebURLSchemeHandler&, WebPageProxy&, uint64_t identifier, WebCore::ResourceRequest&&, SyncLoadCompletionHandler&&);
> 
>     uint64_t identifier() const { return m_identifier; }
>     uint64_t pageID() const { return m_pageIdentifier; }
>@@ -68,7 +77,9 @@ public:
>     void pageDestroyed();
> 
> private:
>-    WebURLSchemeTask(WebURLSchemeHandler&, WebPageProxy&, uint64_t identifier, WebCore::ResourceRequest&&);
>+    WebURLSchemeTask(WebURLSchemeHandler&, WebPageProxy&, uint64_t identifier, WebCore::ResourceRequest&&, SyncLoadCompletionHandler&&);
>+
>+    bool isSync() const { return !!m_syncCompletionHandler; }
> 
>     Ref<WebURLSchemeHandler> m_urlSchemeHandler;
>     WebPageProxy* m_page;
>@@ -79,6 +90,10 @@ private:
>     bool m_responseSent { false };
>     bool m_dataSent { false };
>     bool m_completed { false };
>+    
>+    SyncLoadCompletionHandler m_syncCompletionHandler;
>+    WebCore::ResourceResponse m_syncResponse;
>+    RefPtr<WebCore::SharedBuffer> m_syncData;
> };
> 
> } // namespace WebKit
>diff --git a/Source/WebKit/WebProcess/Network/WebLoaderStrategy.cpp b/Source/WebKit/WebProcess/Network/WebLoaderStrategy.cpp
>index 95998a5af23..15cb99b7a71 100644
>--- a/Source/WebKit/WebProcess/Network/WebLoaderStrategy.cpp
>+++ b/Source/WebKit/WebProcess/Network/WebLoaderStrategy.cpp
>@@ -473,6 +473,26 @@ static bool shouldClearReferrerOnHTTPSToHTTPRedirect(Frame* frame)
>     return true;
> }
> 
>+std::optional<WebLoaderStrategy::SyncLoadResult> WebLoaderStrategy::tryLoadingSynchronouslyUsingURLSchemeHandler(FrameLoader& frameLoader, ResourceLoadIdentifier identifier, const ResourceRequest& request)
>+{
>+    auto* webFrameLoaderClient = toWebFrameLoaderClient(frameLoader.client());
>+    auto* webFrame = webFrameLoaderClient ? webFrameLoaderClient->webFrame() : nullptr;
>+    auto* webPage = webFrame ? webFrame->page() : nullptr;
>+    if (!webPage)
>+        return std::nullopt;
>+
>+    auto* handler = webPage->urlSchemeHandlerForScheme(request.url().protocol().toStringWithoutCopying());
>+    if (!handler)
>+        return std::nullopt;
>+
>+    LOG(NetworkScheduling, "(WebProcess) WebLoaderStrategy::scheduleLoad, sync load to URL '%s' will be handled by a UIProcess URL scheme handler.", request.url().string().utf8().data());
>+
>+    SyncLoadResult result;
>+    handler->loadSynchronously(identifier, request, result.response, result.error, result.data);
>+
>+    return WTFMove(result);
>+}
>+
> void WebLoaderStrategy::loadResourceSynchronously(FrameLoader& frameLoader, unsigned long resourceLoadIdentifier, const ResourceRequest& request, ClientCredentialPolicy clientCredentialPolicy,  const FetchOptions& options, const HTTPHeaderMap& originalRequestHeaders, ResourceError& error, ResourceResponse& response, Vector<char>& data)
> {
>     auto* document = frameLoader.frame().document();
>@@ -481,6 +501,13 @@ void WebLoaderStrategy::loadResourceSynchronously(FrameLoader& frameLoader, unsi
>         return;
>     }
> 
>+    if (auto syncLoadResult = tryLoadingSynchronouslyUsingURLSchemeHandler(frameLoader, resourceLoadIdentifier, request)) {
>+        error = WTFMove(syncLoadResult->error);
>+        response = WTFMove(syncLoadResult->response);
>+        data = WTFMove(syncLoadResult->data);
>+        return;
>+    }
>+
>     WebFrameLoaderClient* webFrameLoaderClient = toWebFrameLoaderClient(frameLoader.client());
>     WebFrame* webFrame = webFrameLoaderClient ? webFrameLoaderClient->webFrame() : nullptr;
>     WebPage* webPage = webFrame ? webFrame->page() : nullptr;
>diff --git a/Source/WebKit/WebProcess/Network/WebLoaderStrategy.h b/Source/WebKit/WebProcess/Network/WebLoaderStrategy.h
>index 0983f4210ff..331d181d814 100644
>--- a/Source/WebKit/WebProcess/Network/WebLoaderStrategy.h
>+++ b/Source/WebKit/WebProcess/Network/WebLoaderStrategy.h
>@@ -90,6 +90,13 @@ private:
>     void internallyFailedLoadTimerFired();
>     void startLocalLoad(WebCore::ResourceLoader&);
>     bool tryLoadingUsingURLSchemeHandler(WebCore::ResourceLoader&);
>+    
>+    struct SyncLoadResult {
>+        WebCore::ResourceResponse response;
>+        WebCore::ResourceError error;
>+        Vector<char> data;
>+    };
>+    std::optional<SyncLoadResult> tryLoadingSynchronouslyUsingURLSchemeHandler(WebCore::FrameLoader&, ResourceLoadIdentifier identifier, const WebCore::ResourceRequest&);
> 
>     WebCore::ResourceResponse responseFromResourceLoadIdentifier(uint64_t resourceLoadIdentifier) final;
>     Vector<WebCore::NetworkTransactionInformation> intermediateLoadInformationFromResourceLoadIdentifier(uint64_t resourceLoadIdentifier) final;
>diff --git a/Source/WebKit/WebProcess/WebPage/WebURLSchemeHandlerProxy.cpp b/Source/WebKit/WebProcess/WebPage/WebURLSchemeHandlerProxy.cpp
>index cdb43fb9eaf..ad2026a5c79 100644
>--- a/Source/WebKit/WebProcess/WebPage/WebURLSchemeHandlerProxy.cpp
>+++ b/Source/WebKit/WebProcess/WebPage/WebURLSchemeHandlerProxy.cpp
>@@ -26,10 +26,18 @@
> #include "config.h"
> #include "WebURLSchemeHandlerProxy.h"
> 
>+#include "DataReference.h"
>+#include "URLSchemeTaskParameters.h"
>+#include "WebCoreArgumentCoders.h"
> #include "WebErrors.h"
> #include "WebLoaderStrategy.h"
>+#include "WebPage.h"
>+#include "WebPageProxyMessages.h"
> #include "WebProcess.h"
>+#include <WebCore/ResourceError.h>
> #include <WebCore/ResourceLoader.h>
>+#include <WebCore/ResourceRequest.h>
>+#include <WebCore/ResourceResponse.h>
> 
> using namespace WebCore;
> 
>@@ -55,6 +63,18 @@ void WebURLSchemeHandlerProxy::startNewTask(ResourceLoader& loader)
>     result.iterator->value->startLoading();
> }
> 
>+void WebURLSchemeHandlerProxy::loadSynchronously(ResourceLoadIdentifier loadIdentifier, const ResourceRequest& request, ResourceResponse& response, ResourceError& error, Vector<char>& data)
>+{
>+    IPC::DataReference dataReference;
>+    if (!m_webPage.sendSync(Messages::WebPageProxy::LoadSynchronousURLSchemeTask(URLSchemeTaskParameters { m_identifier, loadIdentifier, request }), Messages::WebPageProxy::LoadSynchronousURLSchemeTask::Reply(response, error, dataReference))) {
>+        error = failedCustomProtocolSyncLoad(request);
>+        return;
>+    }
>+    
>+    data.resize(dataReference.size());
>+    memcpy(data.data(), dataReference.data(), dataReference.size());
>+}
>+
> void WebURLSchemeHandlerProxy::stopAllTasks()
> {
>     while (!m_tasks.isEmpty())
>diff --git a/Source/WebKit/WebProcess/WebPage/WebURLSchemeHandlerProxy.h b/Source/WebKit/WebProcess/WebPage/WebURLSchemeHandlerProxy.h
>index 742415c771a..d8e377a75c4 100644
>--- a/Source/WebKit/WebProcess/WebPage/WebURLSchemeHandlerProxy.h
>+++ b/Source/WebKit/WebProcess/WebPage/WebURLSchemeHandlerProxy.h
>@@ -39,6 +39,7 @@ class ResourceRequest;
> namespace WebKit {
> 
> class WebPage;
>+typedef uint64_t ResourceLoadIdentifier;
> 
> class WebURLSchemeHandlerProxy : public RefCounted<WebURLSchemeHandlerProxy> {
> public:
>@@ -51,6 +52,8 @@ public:
>     void startNewTask(WebCore::ResourceLoader&);
>     void stopAllTasks();
> 
>+    void loadSynchronously(ResourceLoadIdentifier, const WebCore::ResourceRequest&, WebCore::ResourceResponse&, WebCore::ResourceError&, Vector<char>&);
>+
>     uint64_t identifier() const { return m_identifier; }
>     WebPage& page() { return m_webPage; }
> 
>diff --git a/Tools/ChangeLog b/Tools/ChangeLog
>index c369afeaab6..e906063c1ed 100644
>--- a/Tools/ChangeLog
>+++ b/Tools/ChangeLog
>@@ -1,3 +1,16 @@
>+2018-06-21  Brady Eidson  <beidson@apple.com>
>+
>+        WKURLSchemeHandler doesn't handle sync XHR.
>+        <rdar://problem/40955884> and https://bugs.webkit.org/show_bug.cgi?id=186902
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * TestWebKitAPI/Tests/WebKitCocoa/WKURLSchemeHandler-1.mm:
>+        (-[SyncScheme webView:startURLSchemeTask:]):
>+        (-[SyncScheme webView:stopURLSchemeTask:]):
>+        (-[SyncMessageHandler userContentController:didReceiveScriptMessage:]):
>+        (catch):
>+
> 2018-06-19  Daniel Bates  <dabates@apple.com>
> 
>         QueueStatusServer: "'NoneType' object has no attribute 'message'" in ReleasePatch.get()
>diff --git a/Tools/TestWebKitAPI/Tests/WebKitCocoa/WKURLSchemeHandler-1.mm b/Tools/TestWebKitAPI/Tests/WebKitCocoa/WKURLSchemeHandler-1.mm
>index 412e77f510a..39d0c5d0b80 100644
>--- a/Tools/TestWebKitAPI/Tests/WebKitCocoa/WKURLSchemeHandler-1.mm
>+++ b/Tools/TestWebKitAPI/Tests/WebKitCocoa/WKURLSchemeHandler-1.mm
>@@ -31,8 +31,13 @@
> #import <WebKit/WKURLSchemeTaskPrivate.h>
> #import <WebKit/WKWebViewConfigurationPrivate.h>
> #import <WebKit/WebKit.h>
>+#import <wtf/HashMap.h>
> #import <wtf/RetainPtr.h>
> #import <wtf/Vector.h>
>+#import <wtf/text/StringHash.h>
>+#import <wtf/text/WTFString.h>
>+
>+
> 
> #if WK_API_ENABLED
> 
>@@ -410,3 +415,98 @@ TEST(URLSchemeHandler, Exceptions)
> }
> 
> #endif
>+
>+struct ResourceInfo {
>+    RetainPtr<NSString> mimeType;
>+    const char* data;
>+};
>+
>+@interface SyncScheme : NSObject <WKURLSchemeHandler> {
>+@public
>+    HashMap<String, ResourceInfo> resources;
>+}
>+@end
>+
>+@implementation SyncScheme
>+
>+- (void)webView:(WKWebView *)webView startURLSchemeTask:(id <WKURLSchemeTask>)task
>+{
>+    auto entry = resources.find([task.request.URL absoluteString]);
>+    if (entry == resources.end()) {
>+        NSLog(@"Did not find resource entry for URL %@", task.request.URL);
>+        return;
>+    }
>+
>+    RetainPtr<NSURLResponse> response = adoptNS([[NSURLResponse alloc] initWithURL:task.request.URL MIMEType:entry->value.mimeType.get() expectedContentLength:1 textEncodingName:nil]);
>+    [task didReceiveResponse:response.get()];
>+
>+    [task didReceiveData:[NSData dataWithBytesNoCopy:(void*)entry->value.data length:strlen(entry->value.data) freeWhenDone:NO]];
>+    [task didFinish];
>+}
>+
>+- (void)webView:(WKWebView *)webView stopURLSchemeTask:(id <WKURLSchemeTask>)task
>+{
>+}
>+
>+@end
>+
>+static RetainPtr<NSMutableArray> receivedMessages = adoptNS([@[] mutableCopy]);
>+static bool receivedMessage;
>+
>+@interface SyncMessageHandler : NSObject <WKScriptMessageHandler>
>+@end
>+
>+@implementation SyncMessageHandler
>+- (void)userContentController:(WKUserContentController *)userContentController didReceiveScriptMessage:(WKScriptMessage *)message
>+{
>+    if ([message body])
>+        [receivedMessages addObject:[message body]];
>+    else
>+        [receivedMessages addObject:@""];
>+
>+    receivedMessage = true;
>+}
>+@end
>+
>+static const char* syncMainBytes = R"SYNCRESOURCE(
>+<script>
>+var req = new XMLHttpRequest();
>+req.open("GET", "test.dat", false);
>+try
>+{
>+    req.send(null);
>+    window.webkit.messageHandlers.sync.postMessage(req.responseText);
>+}
>+catch (e)
>+{
>+    window.webkit.messageHandlers.sync.postMessage("Failed sync XHR load");
>+}
>+
>+</script>
>+)SYNCRESOURCE";
>+
>+static const char* syncXHRBytes = "My XHR text!";
>+
>+TEST(URLSchemeHandler, SyncXHR)
>+{
>+    auto webViewConfiguration = adoptNS([[WKWebViewConfiguration alloc] init]);
>+    auto handler = adoptNS([[SyncScheme alloc] init]);
>+    [webViewConfiguration setURLSchemeHandler:handler.get() forURLScheme:@"syncxhr"];
>+    
>+    handler.get()->resources.set("syncxhr://host/main.html", ResourceInfo { @"text/html", syncMainBytes });
>+    handler.get()->resources.set("syncxhr://host/test.dat", ResourceInfo { @"text/plain", syncXHRBytes });
>+
>+    auto messageHandler = adoptNS([[SyncMessageHandler alloc] init]);
>+    [[webViewConfiguration userContentController] addScriptMessageHandler:messageHandler.get() name:@"sync"];
>+    
>+    auto webView = adoptNS([[WKWebView alloc] initWithFrame:NSMakeRect(0, 0, 800, 600) configuration:webViewConfiguration.get()]);
>+
>+    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"syncxhr://host/main.html"]];
>+    [webView loadRequest:request];
>+
>+    TestWebKitAPI::Util::run(&receivedMessage);
>+    receivedMessage = false;
>+    
>+    EXPECT_EQ((unsigned)receivedMessages.get().count, (unsigned)1);
>+    EXPECT_TRUE([receivedMessages.get()[0] isEqualToString:@"My XHR text!"]);
>+}

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Attachments on bug 186902: 343295 | 343308 | 343363 | 343378