Attachment 339563 Details for Bug 185274 – Patch

[patch] Patch

bug-185274-20180504103013.patch (text/plain), 62.33 KB, created by youenn fablet on 2018-05-04 10:30:14 PDT

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Creator: youenn fablet

Created: 2018-05-04 10:30:14 PDT

Size: 62.33 KB

patch

obsolete

>Subversion Revision: 231318
>diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
>index 8ae0fcab720717762c4e3d993c5e2db17d14847b..06279fb136ae89953b6b08217733fbc9271250be 100644
>--- a/Source/WebCore/ChangeLog
>+++ b/Source/WebCore/ChangeLog
>@@ -1,3 +1,21 @@
>+2018-05-03  Youenn Fablet  <youenn@apple.com>
>+
>+        Allow WebResourceLoader to cancel a load served from a service worker
>+        https://bugs.webkit.org/show_bug.cgi?id=185274
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Add support for cancelling a fetch from WebProcess to service worker process.
>+        Use FetchIdentifier instead of uint64_t.
>+
>+        * Modules/fetch/FetchIdentifier.h: Added.
>+        * WebCore.xcodeproj/project.pbxproj:
>+        * workers/service/context/ServiceWorkerFetch.h:
>+        * workers/service/context/ServiceWorkerThreadProxy.cpp:
>+        (WebCore::ServiceWorkerThreadProxy::startFetch):
>+        (WebCore::ServiceWorkerThreadProxy::cancelFetch):
>+        * workers/service/context/ServiceWorkerThreadProxy.h:
>+
> 2018-05-03  Youenn Fablet  <youenn@apple.com>
> 
>         PeerConnection should have its connectionState closed even if doing gathering
>diff --git a/Source/WebKit/ChangeLog b/Source/WebKit/ChangeLog
>index a48a7c759a587e4b8465847c515856b060ee8fc3..088aba27778f94dc1d41db097209bde684be6b69 100644
>--- a/Source/WebKit/ChangeLog
>+++ b/Source/WebKit/ChangeLog
>@@ -1,3 +1,65 @@
>+2018-05-03  Youenn Fablet  <youenn@apple.com>
>+
>+        Allow WebResourceLoader to cancel a load served from a service worker
>+        https://bugs.webkit.org/show_bug.cgi?id=185274
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Use FetchIdentifier instead of uint64_t.
>+        Add IPC support for cancelling a fetch from WebProcess to service worker process.
>+        Ask service worker process to cancel the fetch when its corresponding WebResourceLoader is cancelled.
>+        No change of behavior as once a WebResourceLoader is cancelled, any related IPC is not processed.
>+        A follow-up patch should try to cancel the FetchResponse load, meaning to either cancel the network load
>+        or to abort reading the readable stream.
>+
>+        * Scripts/webkit/messages.py:
>+        * StorageProcess/ServiceWorker/WebSWServerConnection.cpp:
>+        (WebKit::WebSWServerConnection::cancelFetch):
>+        (WebKit::WebSWServerConnection::startFetch):
>+        (WebKit::WebSWServerConnection::didReceiveFetchResponse):
>+        (WebKit::WebSWServerConnection::didReceiveFetchData):
>+        (WebKit::WebSWServerConnection::didReceiveFetchFormData):
>+        (WebKit::WebSWServerConnection::didFinishFetch):
>+        (WebKit::WebSWServerConnection::didFailFetch):
>+        (WebKit::WebSWServerConnection::didNotHandleFetch):
>+        * StorageProcess/ServiceWorker/WebSWServerConnection.h:
>+        * StorageProcess/ServiceWorker/WebSWServerConnection.messages.in:
>+        * StorageProcess/StorageProcess.cpp:
>+        (WebKit::StorageProcess::didFailFetch):
>+        (WebKit::StorageProcess::didNotHandleFetch):
>+        (WebKit::StorageProcess::didReceiveFetchResponse):
>+        (WebKit::StorageProcess::didReceiveFetchData):
>+        (WebKit::StorageProcess::didReceiveFetchFormData):
>+        (WebKit::StorageProcess::didFinishFetch):
>+        * StorageProcess/StorageProcess.h:
>+        * StorageProcess/StorageProcess.messages.in:
>+        * WebProcess/Network/WebLoaderStrategy.cpp:
>+        (WebKit::WebLoaderStrategy::remove):
>+        * WebProcess/Storage/ServiceWorkerClientFetch.cpp:
>+        (WebKit::ServiceWorkerClientFetch::create):
>+        (WebKit::ServiceWorkerClientFetch::ServiceWorkerClientFetch):
>+        (WebKit::ServiceWorkerClientFetch::start):
>+        (WebKit::ServiceWorkerClientFetch::cancel):
>+        * WebProcess/Storage/ServiceWorkerClientFetch.h:
>+        * WebProcess/Storage/WebSWClientConnection.cpp:
>+        (WebKit::WebSWClientConnection::startFetch):
>+        (WebKit::WebSWClientConnection::cancelFetch):
>+        * WebProcess/Storage/WebSWClientConnection.h:
>+        * WebProcess/Storage/WebSWContextManagerConnection.cpp:
>+        (WebKit::WebSWContextManagerConnection::cancelFetch):
>+        (WebKit::WebSWContextManagerConnection::startFetch):
>+        * WebProcess/Storage/WebSWContextManagerConnection.h:
>+        * WebProcess/Storage/WebSWContextManagerConnection.messages.in:
>+        * WebProcess/Storage/WebServiceWorkerFetchTaskClient.cpp:
>+        (WebKit::WebServiceWorkerFetchTaskClient::WebServiceWorkerFetchTaskClient):
>+        (WebKit::WebServiceWorkerFetchTaskClient::cancel):
>+        * WebProcess/Storage/WebServiceWorkerFetchTaskClient.h:
>+        * WebProcess/Storage/WebServiceWorkerProvider.cpp:
>+        (WebKit::WebServiceWorkerProvider::handleFetch):
>+        (WebKit::WebServiceWorkerProvider::cancelFetch):
>+        (WebKit::WebServiceWorkerProvider::fetchFinished):
>+        * WebProcess/Storage/WebServiceWorkerProvider.h:
>+
> 2018-05-03  Commit Queue  <commit-queue@webkit.org>
> 
>         Unreviewed, rolling out r231223 and r231288.
>diff --git a/Source/WebCore/Modules/fetch/FetchIdentifier.h b/Source/WebCore/Modules/fetch/FetchIdentifier.h
>new file mode 100644
>index 0000000000000000000000000000000000000000..b5979e9f298186d166cc6eaba561d322b0e74fd5
>--- /dev/null
>+++ b/Source/WebCore/Modules/fetch/FetchIdentifier.h
>@@ -0,0 +1,35 @@
>+/*
>+ * Copyright (C) 2017 Apple 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:
>+ * 1. Redistributions of source code must retain the above copyright
>+ *    notice, this list of conditions and the following disclaimer.
>+ * 2. 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.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS 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 APPLE INC. OR ITS 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.
>+ */
>+
>+#pragma once
>+
>+#include <wtf/ObjectIdentifier.h>
>+
>+namespace WebCore {
>+
>+enum FetchIdentifierType { };
>+using FetchIdentifier = ObjectIdentifier<FetchIdentifierType>;
>+
>+}
>diff --git a/Source/WebCore/WebCore.xcodeproj/project.pbxproj b/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>index bf68d47ec2065e9281e45126b44db6a43cf3f91c..9454beb42b1a87c0f5166e2314d3b0d7794b4dab 100644
>--- a/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>+++ b/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>@@ -1072,6 +1072,7 @@
> 		4161E2D51FE48DC500EC2E96 /* FetchLoader.h in Headers */ = {isa = PBXBuildFile; fileRef = 4147E2B51C89912600A7E715 /* FetchLoader.h */; settings = {ATTRIBUTES = (Private, ); }; };
> 		4162A451101145AE00DFF3ED /* DedicatedWorkerGlobalScope.h in Headers */ = {isa = PBXBuildFile; fileRef = 4162A44E101145AE00DFF3ED /* DedicatedWorkerGlobalScope.h */; };
> 		4162A4581011464700DFF3ED /* JSDedicatedWorkerGlobalScope.h in Headers */ = {isa = PBXBuildFile; fileRef = 4162A4561011464700DFF3ED /* JSDedicatedWorkerGlobalScope.h */; };
>+		416E0B3A209BC3CB004A95D9 /* FetchIdentifier.h in Headers */ = {isa = PBXBuildFile; fileRef = 416E0B37209BC3C2004A95D9 /* FetchIdentifier.h */; settings = {ATTRIBUTES = (Private, ); }; };
> 		416E29A6102FA962007FC14E /* WorkerReportingProxy.h in Headers */ = {isa = PBXBuildFile; fileRef = 416E29A5102FA962007FC14E /* WorkerReportingProxy.h */; };
> 		416E6FE81BBD12DF000A3F64 /* ReadableStreamInternalsBuiltins.h in Headers */ = {isa = PBXBuildFile; fileRef = 9B03D8061BB3110D00B764D9 /* ReadableStreamInternalsBuiltins.h */; settings = {ATTRIBUTES = (Private, ); }; };
> 		416E6FE81BBD12DF000A3F65 /* JSDOMBindingInternalsBuiltins.h in Headers */ = {isa = PBXBuildFile; fileRef = 9B03D8061BB3110D00B764DA /* JSDOMBindingInternalsBuiltins.h */; settings = {ATTRIBUTES = (Private, ); }; };
>@@ -7198,6 +7199,7 @@
> 		4162A44F101145AE00DFF3ED /* DedicatedWorkerGlobalScope.idl */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text; path = DedicatedWorkerGlobalScope.idl; sourceTree = "<group>"; };
> 		4162A4551011464700DFF3ED /* JSDedicatedWorkerGlobalScope.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = JSDedicatedWorkerGlobalScope.cpp; sourceTree = "<group>"; };
> 		4162A4561011464700DFF3ED /* JSDedicatedWorkerGlobalScope.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = JSDedicatedWorkerGlobalScope.h; sourceTree = "<group>"; };
>+		416E0B37209BC3C2004A95D9 /* FetchIdentifier.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = FetchIdentifier.h; sourceTree = "<group>"; };
> 		416E29A5102FA962007FC14E /* WorkerReportingProxy.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = WorkerReportingProxy.h; sourceTree = "<group>"; };
> 		4170A2E91D8C0CC000318452 /* JSDOMWrapper.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = JSDOMWrapper.cpp; sourceTree = "<group>"; };
> 		417253A81354BBBC00360F2A /* MediaControlElements.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = MediaControlElements.cpp; sourceTree = "<group>"; };
>@@ -16987,6 +16989,7 @@
> 				41F54F821C50C4F600338488 /* FetchHeaders.cpp */,
> 				41F54F831C50C4F600338488 /* FetchHeaders.h */,
> 				41F54F841C50C4F600338488 /* FetchHeaders.idl */,
>+				416E0B37209BC3C2004A95D9 /* FetchIdentifier.h */,
> 				4147E2B41C89912600A7E715 /* FetchLoader.cpp */,
> 				4147E2B51C89912600A7E715 /* FetchLoader.h */,
> 				4147E2B61C89912600A7E715 /* FetchLoaderClient.h */,
>@@ -26953,6 +26956,7 @@
> 				31DCD29D1AB4FBDE0072E817 /* AnimationTrigger.h in Headers */,
> 				0F580FAF149800D400FB5BD8 /* AnimationUtilities.h in Headers */,
> 				93309DD7099E64920056E581 /* AppendNodeCommand.h in Headers */,
>+				416E0B3A209BC3CB004A95D9 /* FetchIdentifier.h in Headers */,
> 				A1DF5A941F7EC4320058A477 /* ApplePayContactField.h in Headers */,
> 				A12C59EE2035FC9B0012236B /* ApplePayError.h in Headers */,
> 				7C6579E31E00827000E3A27A /* ApplePayLineItem.h in Headers */,
>diff --git a/Source/WebCore/workers/service/context/ServiceWorkerFetch.h b/Source/WebCore/workers/service/context/ServiceWorkerFetch.h
>index 7c06c8367fe0621459ec76c04f983a01b3f95bd5..c540388b45d7c45387b1442bbfb02fa0e9182549 100644
>--- a/Source/WebCore/workers/service/context/ServiceWorkerFetch.h
>+++ b/Source/WebCore/workers/service/context/ServiceWorkerFetch.h
>@@ -53,6 +53,7 @@ public:
>     virtual void didFail() = 0;
>     virtual void didFinish() = 0;
>     virtual void didNotHandle() = 0;
>+    virtual void cancel() = 0;
> };
> 
> void dispatchFetchEvent(Ref<Client>&&, ServiceWorkerGlobalScope&, std::optional<ServiceWorkerClientIdentifier>, ResourceRequest&&, String&& referrer, FetchOptions&&);
>diff --git a/Source/WebCore/workers/service/context/ServiceWorkerThreadProxy.cpp b/Source/WebCore/workers/service/context/ServiceWorkerThreadProxy.cpp
>index 89467f3efc8a175937cbd623377c64c9d14184d5..f0e1e7e563620ba55d0cff0ad9a0d72531781536 100644
>--- a/Source/WebCore/workers/service/context/ServiceWorkerThreadProxy.cpp
>+++ b/Source/WebCore/workers/service/context/ServiceWorkerThreadProxy.cpp
>@@ -185,6 +185,30 @@ void ServiceWorkerThreadProxy::notifyNetworkStateChange(bool isOnline)
>     }, WorkerRunLoop::defaultMode());
> }
> 
>+void ServiceWorkerThreadProxy::startFetch(SWServerConnectionIdentifier connectionIdentifier, FetchIdentifier fetchIdentifier, Ref<ServiceWorkerFetch::Client>&& client, std::optional<ServiceWorkerClientIdentifier>&& clientId, ResourceRequest&& request, String&& referrer, FetchOptions&& options)
>+{
>+    auto key = std::make_pair(connectionIdentifier, fetchIdentifier);
>+
>+    ASSERT(!m_fetches.contains(key));
>+    m_fetches.add(key, client.copyRef());
>+    thread().postFetchTask(WTFMove(client), WTFMove(clientId), WTFMove(request), WTFMove(referrer), WTFMove(options));
>+}
>+
>+void ServiceWorkerThreadProxy::cancelFetch(SWServerConnectionIdentifier connectionIdentifier, FetchIdentifier fetchIdentifier)
>+{
>+    auto iterator = m_fetches.find(std::make_pair(connectionIdentifier, fetchIdentifier));
>+    if (iterator == m_fetches.end())
>+        return;
>+    iterator->value->cancel();
>+    m_fetches.remove(iterator);
>+
>+}
>+
>+void ServiceWorkerThreadProxy::removeFetch(SWServerConnectionIdentifier connectionIdentifier, FetchIdentifier fetchIdentifier)
>+{
>+    m_fetches.remove(std::make_pair(connectionIdentifier, fetchIdentifier));
>+}
>+
> } // namespace WebCore
> 
> #endif // ENABLE(SERVICE_WORKER)
>diff --git a/Source/WebCore/workers/service/context/ServiceWorkerThreadProxy.h b/Source/WebCore/workers/service/context/ServiceWorkerThreadProxy.h
>index 6edcc0337b7a2d14dd32043c9f970cd14e236772..e723cac0a30aa145fc8aa7796f7d5391f95c34c6 100644
>--- a/Source/WebCore/workers/service/context/ServiceWorkerThreadProxy.h
>+++ b/Source/WebCore/workers/service/context/ServiceWorkerThreadProxy.h
>@@ -29,6 +29,7 @@
> 
> #include "CacheStorageConnection.h"
> #include "Document.h"
>+#include "FetchIdentifier.h"
> #include "Page.h"
> #include "SecurityOrigin.h"
> #include "ServiceWorkerDebuggable.h"
>@@ -70,6 +71,10 @@ public:
>     // Public only for testing purposes.
>     WEBCORE_TESTSUPPORT_EXPORT void notifyNetworkStateChange(bool isOnline);
> 
>+    WEBCORE_EXPORT void startFetch(SWServerConnectionIdentifier, FetchIdentifier, Ref<ServiceWorkerFetch::Client>&&, std::optional<ServiceWorkerClientIdentifier>&&, ResourceRequest&&, String&& referrer, FetchOptions&&);
>+    WEBCORE_EXPORT void cancelFetch(SWServerConnectionIdentifier, FetchIdentifier);
>+    WEBCORE_EXPORT void removeFetch(SWServerConnectionIdentifier, FetchIdentifier);
>+
> private:
>     WEBCORE_EXPORT ServiceWorkerThreadProxy(PageConfiguration&&, const ServiceWorkerContextData&, PAL::SessionID, String&& userAgent, CacheStorageProvider&, SecurityOrigin::StorageBlockingPolicy);
> 
>@@ -96,6 +101,7 @@ private:
> #if ENABLE(REMOTE_INSPECTOR)
>     std::unique_ptr<ServiceWorkerDebuggable> m_remoteDebuggable;
> #endif
>+    HashMap<std::pair<SWServerConnectionIdentifier, FetchIdentifier>, Ref<ServiceWorkerFetch::Client>> m_fetches;
> };
> 
> } // namespace WebKit
>diff --git a/Source/WebKit/Scripts/webkit/messages.py b/Source/WebKit/Scripts/webkit/messages.py
>index 3ca1ff73f5f57e6a787977c627f54d1814267074..31b280a73823d3a4320a6d865b16a2652e0dcbec 100644
>--- a/Source/WebKit/Scripts/webkit/messages.py
>+++ b/Source/WebKit/Scripts/webkit/messages.py
>@@ -189,6 +189,7 @@ def forward_declarations_and_headers(receiver):
>         'MachSendRight',
>         'String',
>         'WebCore::DocumentIdentifier',
>+        'WebCore::FetchIdentifier',
>         'WebCore::ServiceWorkerIdentifier',
>         'WebCore::ServiceWorkerJobIdentifier',
>         'WebCore::ServiceWorkerOrClientData',
>diff --git a/Source/WebKit/StorageProcess/ServiceWorker/WebSWServerConnection.cpp b/Source/WebKit/StorageProcess/ServiceWorker/WebSWServerConnection.cpp
>index 38c3991eefd1aeebec5572f9081ac4da16da6e38..a3a44217f34ada6f2dcecc7c4e11223855d5eff4 100644
>--- a/Source/WebKit/StorageProcess/ServiceWorker/WebSWServerConnection.cpp
>+++ b/Source/WebKit/StorageProcess/ServiceWorker/WebSWServerConnection.cpp
>@@ -131,12 +131,25 @@ void WebSWServerConnection::updateWorkerStateInClient(ServiceWorkerIdentifier wo
>     send(Messages::WebSWClientConnection::UpdateWorkerState(worker, state));
> }
> 
>-void WebSWServerConnection::startFetch(uint64_t fetchIdentifier, ServiceWorkerRegistrationIdentifier serviceWorkerRegistrationIdentifier, ResourceRequest&& request, FetchOptions&& options, IPC::FormDataReference&& formData, String&& referrer)
>+void WebSWServerConnection::cancelFetch(ServiceWorkerRegistrationIdentifier serviceWorkerRegistrationIdentifier, FetchIdentifier fetchIdentifier)
>+{
>+    auto* worker = server().activeWorkerFromRegistrationID(serviceWorkerRegistrationIdentifier);
>+    if (!worker || !worker->isRunning())
>+        return;
>+
>+    auto serviceWorkerIdentifier = worker->identifier();
>+    server().runServiceWorkerIfNecessary(serviceWorkerIdentifier, [weakThis = makeWeakPtr(this), this, serviceWorkerIdentifier, fetchIdentifier](auto* contextConnection) mutable {
>+        if (weakThis && contextConnection)
>+            sendToContextProcess(*contextConnection, Messages::WebSWContextManagerConnection::CancelFetch { this->identifier(), serviceWorkerIdentifier, fetchIdentifier });
>+    });
>+}
>+
>+void WebSWServerConnection::startFetch(ServiceWorkerRegistrationIdentifier serviceWorkerRegistrationIdentifier, FetchIdentifier fetchIdentifier, ResourceRequest&& request, FetchOptions&& options, IPC::FormDataReference&& formData, String&& referrer)
> {
>     auto* worker = server().activeWorkerFromRegistrationID(serviceWorkerRegistrationIdentifier);
>     if (!worker) {
>-        SWSERVERCONNECTION_RELEASE_LOG_ERROR_IF_ALLOWED("startFetch: fetchIdentifier: %" PRIu64 " -> DidNotHandle because no active worker", fetchIdentifier);
>-        m_contentConnection->send(Messages::ServiceWorkerClientFetch::DidNotHandle { }, fetchIdentifier);
>+        SWSERVERCONNECTION_RELEASE_LOG_ERROR_IF_ALLOWED("startFetch: fetchIdentifier: %" PRIu64 " -> DidNotHandle because no active worker", fetchIdentifier.toUInt64());
>+        m_contentConnection->send(Messages::ServiceWorkerClientFetch::DidNotHandle { }, fetchIdentifier.toUInt64());
>         return;
>     }
>     auto serviceWorkerIdentifier = worker->identifier();
>@@ -146,14 +159,14 @@ void WebSWServerConnection::startFetch(uint64_t fetchIdentifier, ServiceWorkerRe
>             return;
> 
>         if (!success) {
>-            SWSERVERCONNECTION_RELEASE_LOG_ERROR_IF_ALLOWED("startFetch: fetchIdentifier: %" PRIu64 " -> DidNotHandle because worker did not become activated", fetchIdentifier);
>-            m_contentConnection->send(Messages::ServiceWorkerClientFetch::DidNotHandle { }, fetchIdentifier);
>+            SWSERVERCONNECTION_RELEASE_LOG_ERROR_IF_ALLOWED("startFetch: fetchIdentifier: %" PRIu64 " -> DidNotHandle because worker did not become activated", fetchIdentifier.toUInt64());
>+            m_contentConnection->send(Messages::ServiceWorkerClientFetch::DidNotHandle { }, fetchIdentifier.toUInt64());
>             return;
>         }
> 
>         auto* worker = server().workerByID(serviceWorkerIdentifier);
>         if (!worker) {
>-            m_contentConnection->send(Messages::ServiceWorkerClientFetch::DidNotHandle { }, fetchIdentifier);
>+            m_contentConnection->send(Messages::ServiceWorkerClientFetch::DidNotHandle { }, fetchIdentifier.toUInt64());
>             return;
>         }
> 
>@@ -165,11 +178,11 @@ void WebSWServerConnection::startFetch(uint64_t fetchIdentifier, ServiceWorkerRe
>                 return;
> 
>             if (contextConnection) {
>-                SWSERVERCONNECTION_RELEASE_LOG_IF_ALLOWED("startFetch: Starting fetch %" PRIu64 " via service worker %" PRIu64, fetchIdentifier, serviceWorkerIdentifier.toUInt64());
>-                sendToContextProcess(*contextConnection, Messages::WebSWContextManagerConnection::StartFetch { this->identifier(), fetchIdentifier, serviceWorkerIdentifier, request, options, formData, referrer });
>+                SWSERVERCONNECTION_RELEASE_LOG_IF_ALLOWED("startFetch: Starting fetch %" PRIu64 " via service worker %" PRIu64, fetchIdentifier.toUInt64(), serviceWorkerIdentifier.toUInt64());
>+                sendToContextProcess(*contextConnection, Messages::WebSWContextManagerConnection::StartFetch { this->identifier(), serviceWorkerIdentifier, fetchIdentifier, request, options, formData, referrer });
>             } else {
>-                SWSERVERCONNECTION_RELEASE_LOG_ERROR_IF_ALLOWED("startFetch: fetchIdentifier: %" PRIu64 " -> DidNotHandle because failed to run service worker", fetchIdentifier);
>-                m_contentConnection->send(Messages::ServiceWorkerClientFetch::DidNotHandle { }, fetchIdentifier);
>+                SWSERVERCONNECTION_RELEASE_LOG_ERROR_IF_ALLOWED("startFetch: fetchIdentifier: %" PRIu64 " -> DidNotHandle because failed to run service worker", fetchIdentifier.toUInt64());
>+                m_contentConnection->send(Messages::ServiceWorkerClientFetch::DidNotHandle { }, fetchIdentifier.toUInt64());
>             }
>         });
>     };
>@@ -222,38 +235,37 @@ void WebSWServerConnection::scheduleJobInServer(ServiceWorkerJobData&& jobData)
>     server().scheduleJob(WTFMove(jobData));
> }
> 
>-
>-void WebSWServerConnection::didReceiveFetchResponse(uint64_t fetchIdentifier, const ResourceResponse& response)
>+void WebSWServerConnection::didReceiveFetchResponse(FetchIdentifier fetchIdentifier, const ResourceResponse& response)
> {
>-    m_contentConnection->send(Messages::ServiceWorkerClientFetch::DidReceiveResponse { response }, fetchIdentifier);
>+    m_contentConnection->send(Messages::ServiceWorkerClientFetch::DidReceiveResponse { response }, fetchIdentifier.toUInt64());
> }
> 
>-void WebSWServerConnection::didReceiveFetchData(uint64_t fetchIdentifier, const IPC::DataReference& data, int64_t encodedDataLength)
>+void WebSWServerConnection::didReceiveFetchData(FetchIdentifier fetchIdentifier, const IPC::DataReference& data, int64_t encodedDataLength)
> {
>-    m_contentConnection->send(Messages::ServiceWorkerClientFetch::DidReceiveData { data, encodedDataLength }, fetchIdentifier);
>+    m_contentConnection->send(Messages::ServiceWorkerClientFetch::DidReceiveData { data, encodedDataLength }, fetchIdentifier.toUInt64());
> }
> 
>-void WebSWServerConnection::didReceiveFetchFormData(uint64_t fetchIdentifier, const IPC::FormDataReference& formData)
>+void WebSWServerConnection::didReceiveFetchFormData(FetchIdentifier fetchIdentifier, const IPC::FormDataReference& formData)
> {
>-    m_contentConnection->send(Messages::ServiceWorkerClientFetch::DidReceiveFormData { formData }, fetchIdentifier);
>+    m_contentConnection->send(Messages::ServiceWorkerClientFetch::DidReceiveFormData { formData }, fetchIdentifier.toUInt64());
> }
> 
>-void WebSWServerConnection::didFinishFetch(uint64_t fetchIdentifier)
>+void WebSWServerConnection::didFinishFetch(FetchIdentifier fetchIdentifier)
> {
>-    SWSERVERCONNECTION_RELEASE_LOG_IF_ALLOWED("didFinishFetch: fetchIdentifier: %" PRIu64, fetchIdentifier);
>-    m_contentConnection->send(Messages::ServiceWorkerClientFetch::DidFinish { }, fetchIdentifier);
>+    SWSERVERCONNECTION_RELEASE_LOG_IF_ALLOWED("didFinishFetch: fetchIdentifier: %" PRIu64, fetchIdentifier.toUInt64());
>+    m_contentConnection->send(Messages::ServiceWorkerClientFetch::DidFinish { }, fetchIdentifier.toUInt64());
> }
> 
>-void WebSWServerConnection::didFailFetch(uint64_t fetchIdentifier)
>+void WebSWServerConnection::didFailFetch(FetchIdentifier fetchIdentifier)
> {
>-    SWSERVERCONNECTION_RELEASE_LOG_ERROR_IF_ALLOWED("didFailFetch: fetchIdentifier: %" PRIu64, fetchIdentifier);
>-    m_contentConnection->send(Messages::ServiceWorkerClientFetch::DidFail { }, fetchIdentifier);
>+    SWSERVERCONNECTION_RELEASE_LOG_ERROR_IF_ALLOWED("didFailFetch: fetchIdentifier: %" PRIu64, fetchIdentifier.toUInt64());
>+    m_contentConnection->send(Messages::ServiceWorkerClientFetch::DidFail { }, fetchIdentifier.toUInt64());
> }
> 
>-void WebSWServerConnection::didNotHandleFetch(uint64_t fetchIdentifier)
>+void WebSWServerConnection::didNotHandleFetch(FetchIdentifier fetchIdentifier)
> {
>-    SWSERVERCONNECTION_RELEASE_LOG_IF_ALLOWED("didNotHandleFetch: fetchIdentifier: %" PRIu64, fetchIdentifier);
>-    m_contentConnection->send(Messages::ServiceWorkerClientFetch::DidNotHandle { }, fetchIdentifier);
>+    SWSERVERCONNECTION_RELEASE_LOG_IF_ALLOWED("didNotHandleFetch: fetchIdentifier: %" PRIu64, fetchIdentifier.toUInt64());
>+    m_contentConnection->send(Messages::ServiceWorkerClientFetch::DidNotHandle { }, fetchIdentifier.toUInt64());
> }
> 
> void WebSWServerConnection::postMessageToServiceWorkerClient(DocumentIdentifier destinationContextIdentifier, MessageWithMessagePorts&& message, ServiceWorkerIdentifier sourceIdentifier, const String& sourceOrigin)
>diff --git a/Source/WebKit/StorageProcess/ServiceWorker/WebSWServerConnection.h b/Source/WebKit/StorageProcess/ServiceWorker/WebSWServerConnection.h
>index 726d02e676d35b4ae26af02f930e8659ff25c54d..f4ccb6b99181cc5f5d53a1baaa274a43c301b243 100644
>--- a/Source/WebKit/StorageProcess/ServiceWorker/WebSWServerConnection.h
>+++ b/Source/WebKit/StorageProcess/ServiceWorker/WebSWServerConnection.h
>@@ -29,6 +29,7 @@
> 
> #include "MessageReceiver.h"
> #include "MessageSender.h"
>+#include <WebCore/FetchIdentifier.h>
> #include <WebCore/SWServer.h>
> #include <pal/SessionID.h>
> #include <wtf/HashMap.h>
>@@ -61,12 +62,12 @@ public:
> 
>     PAL::SessionID sessionID() const { return m_sessionID; }
> 
>-    void didReceiveFetchResponse(uint64_t fetchIdentifier, const WebCore::ResourceResponse&);
>-    void didReceiveFetchData(uint64_t fetchIdentifier, const IPC::DataReference&, int64_t encodedDataLength);
>-    void didReceiveFetchFormData(uint64_t fetchIdentifier, const IPC::FormDataReference&);
>-    void didFinishFetch(uint64_t fetchIdentifier);
>-    void didFailFetch(uint64_t fetchIdentifier);
>-    void didNotHandleFetch(uint64_t fetchIdentifier);
>+    void didReceiveFetchResponse(WebCore::FetchIdentifier, const WebCore::ResourceResponse&);
>+    void didReceiveFetchData(WebCore::FetchIdentifier, const IPC::DataReference&, int64_t encodedDataLength);
>+    void didReceiveFetchFormData(WebCore::FetchIdentifier, const IPC::FormDataReference&);
>+    void didFinishFetch(WebCore::FetchIdentifier);
>+    void didFailFetch(WebCore::FetchIdentifier);
>+    void didNotHandleFetch(WebCore::FetchIdentifier);
> 
>     void postMessageToServiceWorkerClient(WebCore::DocumentIdentifier destinationContextIdentifier, WebCore::MessageWithMessagePorts&&, WebCore::ServiceWorkerIdentifier sourceServiceWorkerIdentifier, const String& sourceOrigin);
>     void postMessageToServiceWorker(WebCore::ServiceWorkerIdentifier destination, WebCore::MessageWithMessagePorts&&, const WebCore::ServiceWorkerOrClientIdentifier& source);
>@@ -87,7 +88,8 @@ private:
> 
>     void scheduleJobInServer(WebCore::ServiceWorkerJobData&&);
> 
>-    void startFetch(uint64_t fetchIdentifier, WebCore::ServiceWorkerRegistrationIdentifier, WebCore::ResourceRequest&&, WebCore::FetchOptions&&, IPC::FormDataReference&&, String&& referrer);
>+    void startFetch(WebCore::ServiceWorkerRegistrationIdentifier, WebCore::FetchIdentifier, WebCore::ResourceRequest&&, WebCore::FetchOptions&&, IPC::FormDataReference&&, String&& referrer);
>+    void cancelFetch(WebCore::ServiceWorkerRegistrationIdentifier, WebCore::FetchIdentifier);
> 
>     void matchRegistration(uint64_t registrationMatchRequestIdentifier, const WebCore::SecurityOriginData& topOrigin, const WebCore::URL& clientURL);
>     void getRegistrations(uint64_t registrationMatchRequestIdentifier, const WebCore::SecurityOriginData& topOrigin, const WebCore::URL& clientURL);
>diff --git a/Source/WebKit/StorageProcess/ServiceWorker/WebSWServerConnection.messages.in b/Source/WebKit/StorageProcess/ServiceWorker/WebSWServerConnection.messages.in
>index e1b3d01da4d3ea545cc5e2429b483777c849d33f..06195b8ad194618cdff6ffe9d575e9f3a444a7ed 100644
>--- a/Source/WebKit/StorageProcess/ServiceWorker/WebSWServerConnection.messages.in
>+++ b/Source/WebKit/StorageProcess/ServiceWorker/WebSWServerConnection.messages.in
>@@ -29,7 +29,8 @@ messages -> WebSWServerConnection {
>     AddServiceWorkerRegistrationInServer(WebCore::ServiceWorkerRegistrationIdentifier identifier)
>     RemoveServiceWorkerRegistrationInServer(WebCore::ServiceWorkerRegistrationIdentifier identifier)
> 
>-    StartFetch(uint64_t identifier, WebCore::ServiceWorkerRegistrationIdentifier serviceWorkerRegistrationIdentifier, WebCore::ResourceRequest request, struct WebCore::FetchOptions options, IPC::FormDataReference requestBody, String referrer)
>+    StartFetch(WebCore::ServiceWorkerRegistrationIdentifier serviceWorkerRegistrationIdentifier, WebCore::FetchIdentifier fetchIdentifier, WebCore::ResourceRequest request, struct WebCore::FetchOptions options, IPC::FormDataReference requestBody, String referrer)
>+    CancelFetch(WebCore::ServiceWorkerRegistrationIdentifier serviceWorkerRegistrationIdentifier, WebCore::FetchIdentifier fetchIdentifier)
> 
>     PostMessageToServiceWorker(WebCore::ServiceWorkerIdentifier destination, struct WebCore::MessageWithMessagePorts message, WebCore::ServiceWorkerOrClientIdentifier source)
> 
>diff --git a/Source/WebKit/StorageProcess/StorageProcess.cpp b/Source/WebKit/StorageProcess/StorageProcess.cpp
>index 9bbbbaac55217c49311cffadcc378aa5c3704233..48a5bf2cdf7df168e144390f83662acd7af20b45 100644
>--- a/Source/WebKit/StorageProcess/StorageProcess.cpp
>+++ b/Source/WebKit/StorageProcess/StorageProcess.cpp
>@@ -478,37 +478,37 @@ void StorageProcess::createServerToContextConnection(const SecurityOriginData& s
>         parentProcessConnection()->send(Messages::StorageProcessProxy::EstablishWorkerContextConnectionToStorageProcess(securityOrigin), 0);
> }
> 
>-void StorageProcess::didFailFetch(SWServerConnectionIdentifier serverConnectionIdentifier, uint64_t fetchIdentifier)
>+void StorageProcess::didFailFetch(SWServerConnectionIdentifier serverConnectionIdentifier, FetchIdentifier fetchIdentifier)
> {
>     if (auto* connection = m_swServerConnections.get(serverConnectionIdentifier))
>         connection->didFailFetch(fetchIdentifier);
> }
> 
>-void StorageProcess::didNotHandleFetch(SWServerConnectionIdentifier serverConnectionIdentifier, uint64_t fetchIdentifier)
>+void StorageProcess::didNotHandleFetch(SWServerConnectionIdentifier serverConnectionIdentifier, FetchIdentifier fetchIdentifier)
> {
>     if (auto* connection = m_swServerConnections.get(serverConnectionIdentifier))
>         connection->didNotHandleFetch(fetchIdentifier);
> }
> 
>-void StorageProcess::didReceiveFetchResponse(SWServerConnectionIdentifier serverConnectionIdentifier, uint64_t fetchIdentifier, const WebCore::ResourceResponse& response)
>+void StorageProcess::didReceiveFetchResponse(SWServerConnectionIdentifier serverConnectionIdentifier, FetchIdentifier fetchIdentifier, const WebCore::ResourceResponse& response)
> {
>     if (auto* connection = m_swServerConnections.get(serverConnectionIdentifier))
>         connection->didReceiveFetchResponse(fetchIdentifier, response);
> }
> 
>-void StorageProcess::didReceiveFetchData(SWServerConnectionIdentifier serverConnectionIdentifier, uint64_t fetchIdentifier, const IPC::DataReference& data, int64_t encodedDataLength)
>+void StorageProcess::didReceiveFetchData(SWServerConnectionIdentifier serverConnectionIdentifier, FetchIdentifier fetchIdentifier, const IPC::DataReference& data, int64_t encodedDataLength)
> {
>     if (auto* connection = m_swServerConnections.get(serverConnectionIdentifier))
>         connection->didReceiveFetchData(fetchIdentifier, data, encodedDataLength);
> }
> 
>-void StorageProcess::didReceiveFetchFormData(SWServerConnectionIdentifier serverConnectionIdentifier, uint64_t fetchIdentifier, const IPC::FormDataReference& formData)
>+void StorageProcess::didReceiveFetchFormData(SWServerConnectionIdentifier serverConnectionIdentifier, FetchIdentifier fetchIdentifier, const IPC::FormDataReference& formData)
> {
>     if (auto* connection = m_swServerConnections.get(serverConnectionIdentifier))
>         connection->didReceiveFetchFormData(fetchIdentifier, formData);
> }
> 
>-void StorageProcess::didFinishFetch(SWServerConnectionIdentifier serverConnectionIdentifier, uint64_t fetchIdentifier)
>+void StorageProcess::didFinishFetch(SWServerConnectionIdentifier serverConnectionIdentifier, FetchIdentifier fetchIdentifier)
> {
>     if (auto* connection = m_swServerConnections.get(serverConnectionIdentifier))
>         connection->didFinishFetch(fetchIdentifier);
>diff --git a/Source/WebKit/StorageProcess/StorageProcess.h b/Source/WebKit/StorageProcess/StorageProcess.h
>index 6010a9ef196b7baf5cb33877585a0d6c4051e019..fa43f41791ea634f1279a72d6e52c923721fca53 100644
>--- a/Source/WebKit/StorageProcess/StorageProcess.h
>+++ b/Source/WebKit/StorageProcess/StorageProcess.h
>@@ -27,6 +27,7 @@
> 
> #include "ChildProcess.h"
> #include "SandboxExtension.h"
>+#include <WebCore/FetchIdentifier.h>
> #include <WebCore/IDBBackingStore.h>
> #include <WebCore/IDBServer.h>
> #include <WebCore/SecurityOriginData.h>
>@@ -136,12 +137,12 @@ private:
>     void didGetSandboxExtensionsForBlobFiles(uint64_t requestID, SandboxExtension::HandleArray&&);
> #endif
> #if ENABLE(SERVICE_WORKER)
>-    void didReceiveFetchResponse(WebCore::SWServerConnectionIdentifier, uint64_t fetchIdentifier, const WebCore::ResourceResponse&);
>-    void didReceiveFetchData(WebCore::SWServerConnectionIdentifier, uint64_t fetchIdentifier, const IPC::DataReference&, int64_t encodedDataLength);
>-    void didReceiveFetchFormData(WebCore::SWServerConnectionIdentifier, uint64_t fetchIdentifier, const IPC::FormDataReference&);
>-    void didFinishFetch(WebCore::SWServerConnectionIdentifier, uint64_t fetchIdentifier);
>-    void didFailFetch(WebCore::SWServerConnectionIdentifier, uint64_t fetchIdentifier);
>-    void didNotHandleFetch(WebCore::SWServerConnectionIdentifier, uint64_t fetchIdentifier);
>+    void didReceiveFetchResponse(WebCore::SWServerConnectionIdentifier, WebCore::FetchIdentifier, const WebCore::ResourceResponse&);
>+    void didReceiveFetchData(WebCore::SWServerConnectionIdentifier, WebCore::FetchIdentifier, const IPC::DataReference&, int64_t encodedDataLength);
>+    void didReceiveFetchFormData(WebCore::SWServerConnectionIdentifier, WebCore::FetchIdentifier, const IPC::FormDataReference&);
>+    void didFinishFetch(WebCore::SWServerConnectionIdentifier, WebCore::FetchIdentifier);
>+    void didFailFetch(WebCore::SWServerConnectionIdentifier, WebCore::FetchIdentifier);
>+    void didNotHandleFetch(WebCore::SWServerConnectionIdentifier, WebCore::FetchIdentifier);
> 
>     void postMessageToServiceWorkerClient(const WebCore::ServiceWorkerClientIdentifier& destinationIdentifier, WebCore::MessageWithMessagePorts&&, WebCore::ServiceWorkerIdentifier sourceIdentifier, const String& sourceOrigin);
>     void postMessageToServiceWorker(WebCore::ServiceWorkerIdentifier destination, WebCore::MessageWithMessagePorts&&, const WebCore::ServiceWorkerOrClientIdentifier& source, WebCore::SWServerConnectionIdentifier);
>diff --git a/Source/WebKit/StorageProcess/StorageProcess.messages.in b/Source/WebKit/StorageProcess/StorageProcess.messages.in
>index 81d1930e4a147a345057f195d4008d794e995369..56aa746f7ebb7a7496391d3edc34f78456345396 100644
>--- a/Source/WebKit/StorageProcess/StorageProcess.messages.in
>+++ b/Source/WebKit/StorageProcess/StorageProcess.messages.in
>@@ -36,12 +36,12 @@ messages -> StorageProcess LegacyReceiver {
> #endif
> 
> #if ENABLE(SERVICE_WORKER)
>-    DidNotHandleFetch(WebCore::SWServerConnectionIdentifier serverConnectionIdentifier, uint64_t fetchIdentifier)
>-    DidFailFetch(WebCore::SWServerConnectionIdentifier serverConnectionIdentifier, uint64_t fetchIdentifier)
>-    DidReceiveFetchResponse(WebCore::SWServerConnectionIdentifier serverConnectionIdentifier, uint64_t fetchIdentifier, WebCore::ResourceResponse response)
>-    DidReceiveFetchData(WebCore::SWServerConnectionIdentifier serverConnectionIdentifier, uint64_t fetchIdentifier, IPC::DataReference data, int64_t encodedDataLength)
>-    DidReceiveFetchFormData(WebCore::SWServerConnectionIdentifier serverConnectionIdentifier, uint64_t fetchIdentifier, IPC::FormDataReference data)
>-    DidFinishFetch(WebCore::SWServerConnectionIdentifier serverConnectionIdentifier, uint64_t fetchIdentifier)
>+    DidNotHandleFetch(WebCore::SWServerConnectionIdentifier serverConnectionIdentifier, WebCore::FetchIdentifier fetchIdentifier)
>+    DidFailFetch(WebCore::SWServerConnectionIdentifier serverConnectionIdentifier, WebCore::FetchIdentifier fetchIdentifier)
>+    DidReceiveFetchResponse(WebCore::SWServerConnectionIdentifier serverConnectionIdentifier, WebCore::FetchIdentifier fetchIdentifier, WebCore::ResourceResponse response)
>+    DidReceiveFetchData(WebCore::SWServerConnectionIdentifier serverConnectionIdentifier, WebCore::FetchIdentifier fetchIdentifier, IPC::DataReference data, int64_t encodedDataLength)
>+    DidReceiveFetchFormData(WebCore::SWServerConnectionIdentifier serverConnectionIdentifier, WebCore::FetchIdentifier fetchIdentifier, IPC::FormDataReference data)
>+    DidFinishFetch(WebCore::SWServerConnectionIdentifier serverConnectionIdentifier, WebCore::FetchIdentifier fetchIdentifier)
>     PostMessageToServiceWorkerClient(struct WebCore::ServiceWorkerClientIdentifier destinationIdentifier, struct WebCore::MessageWithMessagePorts message, WebCore::ServiceWorkerIdentifier sourceIdentifier, String sourceOrigin)
> 
>     PostMessageToServiceWorker(WebCore::ServiceWorkerIdentifier destination, struct WebCore::MessageWithMessagePorts message, WebCore::ServiceWorkerOrClientIdentifier source, WebCore::SWServerConnectionIdentifier connectionIdentifier)
>diff --git a/Source/WebKit/WebProcess/Network/WebLoaderStrategy.cpp b/Source/WebKit/WebProcess/Network/WebLoaderStrategy.cpp
>index b691fee2f08b3a608a4086e14236a2bc5ab9749e..968f13956fec25c416961df133494cf7815a7004 100644
>--- a/Source/WebKit/WebProcess/Network/WebLoaderStrategy.cpp
>+++ b/Source/WebKit/WebProcess/Network/WebLoaderStrategy.cpp
>@@ -404,7 +404,7 @@ void WebLoaderStrategy::remove(ResourceLoader* resourceLoader)
>     }
> 
> #if ENABLE(SERVICE_WORKER)
>-    if (WebServiceWorkerProvider::singleton().cancelFetch(identifier))
>+    if (WebServiceWorkerProvider::singleton().cancelFetch(makeObjectIdentifier<FetchIdentifierType>(identifier)))
>         return;
> #endif
> 
>diff --git a/Source/WebKit/WebProcess/Storage/ServiceWorkerClientFetch.cpp b/Source/WebKit/WebProcess/Storage/ServiceWorkerClientFetch.cpp
>index 7101a7c0b6489d2b9b818d4c5306b3dbda7f94a0..1397deab38e63d4ab8986daf4619264ccc9de9b4 100644
>--- a/Source/WebKit/WebProcess/Storage/ServiceWorkerClientFetch.cpp
>+++ b/Source/WebKit/WebProcess/Storage/ServiceWorkerClientFetch.cpp
>@@ -40,7 +40,7 @@ using namespace WebCore;
> 
> namespace WebKit {
> 
>-Ref<ServiceWorkerClientFetch> ServiceWorkerClientFetch::create(WebServiceWorkerProvider& serviceWorkerProvider, Ref<WebCore::ResourceLoader>&& loader, uint64_t identifier, Ref<WebSWClientConnection>&& connection, bool shouldClearReferrerOnHTTPSToHTTPRedirect, Callback&& callback)
>+Ref<ServiceWorkerClientFetch> ServiceWorkerClientFetch::create(WebServiceWorkerProvider& serviceWorkerProvider, Ref<WebCore::ResourceLoader>&& loader, FetchIdentifier identifier, Ref<WebSWClientConnection>&& connection, bool shouldClearReferrerOnHTTPSToHTTPRedirect, Callback&& callback)
> {
>     auto fetch = adoptRef(*new ServiceWorkerClientFetch { serviceWorkerProvider, WTFMove(loader), identifier, WTFMove(connection), shouldClearReferrerOnHTTPSToHTTPRedirect, WTFMove(callback) });
>     fetch->start();
>@@ -51,7 +51,7 @@ ServiceWorkerClientFetch::~ServiceWorkerClientFetch()
> {
> }
> 
>-ServiceWorkerClientFetch::ServiceWorkerClientFetch(WebServiceWorkerProvider& serviceWorkerProvider, Ref<WebCore::ResourceLoader>&& loader, uint64_t identifier, Ref<WebSWClientConnection>&& connection, bool shouldClearReferrerOnHTTPSToHTTPRedirect, Callback&& callback)
>+ServiceWorkerClientFetch::ServiceWorkerClientFetch(WebServiceWorkerProvider& serviceWorkerProvider, Ref<WebCore::ResourceLoader>&& loader, FetchIdentifier identifier, Ref<WebSWClientConnection>&& connection, bool shouldClearReferrerOnHTTPSToHTTPRedirect, Callback&& callback)
>     : m_serviceWorkerProvider(serviceWorkerProvider)
>     , m_loader(WTFMove(loader))
>     , m_identifier(identifier)
>@@ -75,7 +75,8 @@ void ServiceWorkerClientFetch::start()
>     cleanHTTPRequestHeadersForAccessControl(request, options.httpHeadersToKeep);
> 
>     ASSERT(options.serviceWorkersMode != ServiceWorkersMode::None);
>-    m_connection->startFetch(m_loader->identifier(), options.serviceWorkerRegistrationIdentifier.value(), request, options, referrer);
>+    m_serviceWorkerRegistrationIdentifier = options.serviceWorkerRegistrationIdentifier.value();
>+    m_connection->startFetch(m_identifier, m_serviceWorkerRegistrationIdentifier, request, options, referrer);
> 
>     m_redirectionStatus = RedirectionStatus::None;
> }
>@@ -259,6 +260,11 @@ void ServiceWorkerClientFetch::cancel()
> {
>     if (auto callback = WTFMove(m_callback))
>         callback(Result::Cancelled);
>+
>+    if (!m_didFinish && !m_didFail) {
>+        m_connection->cancelFetch(m_identifier, m_serviceWorkerRegistrationIdentifier);
>+
>+    }
>     m_loader = nullptr;
>     m_buffer = nullptr;
> }
>diff --git a/Source/WebKit/WebProcess/Storage/ServiceWorkerClientFetch.h b/Source/WebKit/WebProcess/Storage/ServiceWorkerClientFetch.h
>index 8da1419dc58d2f9eeb2ad89331cfbea924c09055..7d6df82bb300fe581065d4735bba9c4c06e93041 100644
>--- a/Source/WebKit/WebProcess/Storage/ServiceWorkerClientFetch.h
>+++ b/Source/WebKit/WebProcess/Storage/ServiceWorkerClientFetch.h
>@@ -31,6 +31,7 @@
> #include "FormDataReference.h"
> #include "MessageReceiver.h"
> #include "MessageSender.h"
>+#include <WebCore/FetchIdentifier.h>
> #include <WebCore/ResourceLoader.h>
> #include <wtf/CompletionHandler.h>
> 
>@@ -44,7 +45,7 @@ public:
>     enum class Result { Succeeded, Cancelled, Unhandled };
>     using Callback = WTF::CompletionHandler<void(Result)>;
> 
>-    static Ref<ServiceWorkerClientFetch> create(WebServiceWorkerProvider&, Ref<WebCore::ResourceLoader>&&, uint64_t identifier, Ref<WebSWClientConnection>&&, bool shouldClearReferrerOnHTTPSToHTTPRedirect, Callback&&);
>+    static Ref<ServiceWorkerClientFetch> create(WebServiceWorkerProvider&, Ref<WebCore::ResourceLoader>&&, WebCore::FetchIdentifier, Ref<WebSWClientConnection>&&, bool shouldClearReferrerOnHTTPSToHTTPRedirect, Callback&&);
>     ~ServiceWorkerClientFetch();
> 
>     void start();
>@@ -55,7 +56,7 @@ public:
>     bool isOngoing() const { return !!m_callback; }
> 
> private:
>-    ServiceWorkerClientFetch(WebServiceWorkerProvider&, Ref<WebCore::ResourceLoader>&&, uint64_t identifier, Ref<WebSWClientConnection>&&, bool shouldClearReferrerOnHTTPSToHTTPRedirect, Callback&&);
>+    ServiceWorkerClientFetch(WebServiceWorkerProvider&, Ref<WebCore::ResourceLoader>&&, WebCore::FetchIdentifier, Ref<WebSWClientConnection>&&, bool shouldClearReferrerOnHTTPSToHTTPRedirect, Callback&&);
> 
>     std::optional<WebCore::ResourceError> validateResponse(const WebCore::ResourceResponse&);
> 
>@@ -70,7 +71,7 @@ private:
> 
>     WebServiceWorkerProvider& m_serviceWorkerProvider;
>     RefPtr<WebCore::ResourceLoader> m_loader;
>-    uint64_t m_identifier { 0 };
>+    WebCore::FetchIdentifier m_identifier;
>     Ref<WebSWClientConnection> m_connection;
>     Callback m_callback;
>     enum class RedirectionStatus { None, Receiving, Following, Received };
>@@ -81,6 +82,8 @@ private:
>     bool m_isCheckingResponse { false };
>     bool m_didFinish { false };
>     bool m_didFail { false };
>+
>+    WebCore::ServiceWorkerRegistrationIdentifier m_serviceWorkerRegistrationIdentifier;
> };
> 
> } // namespace WebKit
>diff --git a/Source/WebKit/WebProcess/Storage/WebSWClientConnection.cpp b/Source/WebKit/WebProcess/Storage/WebSWClientConnection.cpp
>index 04bbae431cad5ced4d5933680bb8d03632d1e71d..0cf949959a41bfda57b577f531db25927b70c80c 100644
>--- a/Source/WebKit/WebProcess/Storage/WebSWClientConnection.cpp
>+++ b/Source/WebKit/WebProcess/Storage/WebSWClientConnection.cpp
>@@ -199,9 +199,14 @@ void WebSWClientConnection::getRegistrations(SecurityOriginData&& topOrigin, con
>     });
> }
> 
>-void WebSWClientConnection::startFetch(uint64_t fetchIdentifier, WebCore::ServiceWorkerRegistrationIdentifier serviceWorkerRegistrationIdentifier, const WebCore::ResourceRequest& request, const WebCore::FetchOptions& options, const String& referrer)
>+void WebSWClientConnection::startFetch(WebCore::FetchIdentifier fetchIdentifier, WebCore::ServiceWorkerRegistrationIdentifier serviceWorkerRegistrationIdentifier, const WebCore::ResourceRequest& request, const WebCore::FetchOptions& options, const String& referrer)
> {
>-    send(Messages::WebSWServerConnection::StartFetch { fetchIdentifier, serviceWorkerRegistrationIdentifier, request, options, IPC::FormDataReference { request.httpBody() }, referrer });
>+    send(Messages::WebSWServerConnection::StartFetch { serviceWorkerRegistrationIdentifier, fetchIdentifier, request, options, IPC::FormDataReference { request.httpBody() }, referrer });
>+}
>+
>+void WebSWClientConnection::cancelFetch(WebCore::FetchIdentifier fetchIdentifier, WebCore::ServiceWorkerRegistrationIdentifier serviceWorkerRegistrationIdentifier)
>+{
>+    send(Messages::WebSWServerConnection::CancelFetch { serviceWorkerRegistrationIdentifier, fetchIdentifier });
> }
> 
> void WebSWClientConnection::postMessageToServiceWorkerClient(DocumentIdentifier destinationContextIdentifier, MessageWithMessagePorts&& message, ServiceWorkerData&& source, const String& sourceOrigin)
>diff --git a/Source/WebKit/WebProcess/Storage/WebSWClientConnection.h b/Source/WebKit/WebProcess/Storage/WebSWClientConnection.h
>index 7fd7694fc2b7460a948bb03be3aa45b7e4d817bc..2bfaee476e1f4bcccdb2660fe5d8e66bd674a3d7 100644
>--- a/Source/WebKit/WebProcess/Storage/WebSWClientConnection.h
>+++ b/Source/WebKit/WebProcess/Storage/WebSWClientConnection.h
>@@ -61,7 +61,8 @@ public:
>     void didReceiveMessage(IPC::Connection&, IPC::Decoder&) final;
> 
>     bool mayHaveServiceWorkerRegisteredForOrigin(const WebCore::SecurityOriginData&) const final;
>-    void startFetch(uint64_t fetchIdentifier, WebCore::ServiceWorkerRegistrationIdentifier, const WebCore::ResourceRequest&, const WebCore::FetchOptions&, const String& referrer);
>+    void startFetch(WebCore::FetchIdentifier, WebCore::ServiceWorkerRegistrationIdentifier, const WebCore::ResourceRequest&, const WebCore::FetchOptions&, const String& referrer);
>+    void cancelFetch(WebCore::FetchIdentifier, WebCore::ServiceWorkerRegistrationIdentifier);
> 
>     void postMessageToServiceWorkerClient(WebCore::DocumentIdentifier destinationContextIdentifier, WebCore::MessageWithMessagePorts&&, WebCore::ServiceWorkerData&& source, const String& sourceOrigin);
> 
>diff --git a/Source/WebKit/WebProcess/Storage/WebSWContextManagerConnection.cpp b/Source/WebKit/WebProcess/Storage/WebSWContextManagerConnection.cpp
>index 015d70e9f87c7d07be4b3431f33f7d1b46d7b2e7..1c42d0ba6020aefa6d8a9fdbf3298823a8989d45 100644
>--- a/Source/WebKit/WebProcess/Storage/WebSWContextManagerConnection.cpp
>+++ b/Source/WebKit/WebProcess/Storage/WebSWContextManagerConnection.cpp
>@@ -198,11 +198,17 @@ static inline bool isValidFetch(const ResourceRequest& request, const FetchOptio
>     return protocolHostAndPortAreEqual(url, serviceWorkerURL);
> }
> 
>-void WebSWContextManagerConnection::startFetch(SWServerConnectionIdentifier serverConnectionIdentifier, uint64_t fetchIdentifier, ServiceWorkerIdentifier serviceWorkerIdentifier, ResourceRequest&& request, FetchOptions&& options, IPC::FormDataReference&& formData, String&& referrer)
>+void WebSWContextManagerConnection::cancelFetch(SWServerConnectionIdentifier serverConnectionIdentifier, ServiceWorkerIdentifier serviceWorkerIdentifier, FetchIdentifier fetchIdentifier)
>+{
>+    if (auto* serviceWorkerThreadProxy = SWContextManager::singleton().serviceWorkerThreadProxy(serviceWorkerIdentifier))
>+        serviceWorkerThreadProxy->cancelFetch(serverConnectionIdentifier, fetchIdentifier);
>+}
>+
>+void WebSWContextManagerConnection::startFetch(SWServerConnectionIdentifier serverConnectionIdentifier, ServiceWorkerIdentifier serviceWorkerIdentifier, FetchIdentifier fetchIdentifier, ResourceRequest&& request, FetchOptions&& options, IPC::FormDataReference&& formData, String&& referrer)
> {
>     auto* serviceWorkerThreadProxy = SWContextManager::singleton().serviceWorkerThreadProxy(serviceWorkerIdentifier);
>     if (!serviceWorkerThreadProxy) {
>-        m_connectionToStorageProcess->send(Messages::StorageProcess::DidNotHandleFetch(serverConnectionIdentifier, fetchIdentifier), 0);
>+        m_connectionToStorageProcess->send(Messages::StorageProcess::DidNotHandleFetch { serverConnectionIdentifier, fetchIdentifier }, 0);
>         return;
>     }
> 
>@@ -214,7 +220,7 @@ void WebSWContextManagerConnection::startFetch(SWServerConnectionIdentifier serv
>         clientId = ServiceWorkerClientIdentifier { serverConnectionIdentifier, options.clientIdentifier.value() };
> 
>     request.setHTTPBody(formData.takeData());
>-    serviceWorkerThreadProxy->thread().postFetchTask(WTFMove(client), WTFMove(clientId), WTFMove(request), WTFMove(referrer), WTFMove(options));
>+    serviceWorkerThreadProxy->startFetch(serverConnectionIdentifier, fetchIdentifier, WTFMove(client), WTFMove(clientId), WTFMove(request), WTFMove(referrer), WTFMove(options));
> }
> 
> void WebSWContextManagerConnection::postMessageToServiceWorker(ServiceWorkerIdentifier destinationIdentifier, MessageWithMessagePorts&& message, ServiceWorkerOrClientData&& sourceData)
>diff --git a/Source/WebKit/WebProcess/Storage/WebSWContextManagerConnection.h b/Source/WebKit/WebProcess/Storage/WebSWContextManagerConnection.h
>index 8e8207d69df017cc4ee7e686f6199deacded7368..2b2174f8c85978eb0c8656a13783d5a161c4f96c 100644
>--- a/Source/WebKit/WebProcess/Storage/WebSWContextManagerConnection.h
>+++ b/Source/WebKit/WebProcess/Storage/WebSWContextManagerConnection.h
>@@ -76,7 +76,8 @@ private:
>     // IPC messages.
>     void serviceWorkerStartedWithMessage(std::optional<WebCore::ServiceWorkerJobDataIdentifier>, WebCore::ServiceWorkerIdentifier, const String& exceptionMessage) final;
>     void installServiceWorker(const WebCore::ServiceWorkerContextData&, PAL::SessionID);
>-    void startFetch(WebCore::SWServerConnectionIdentifier, uint64_t fetchIdentifier, WebCore::ServiceWorkerIdentifier, WebCore::ResourceRequest&&, WebCore::FetchOptions&&, IPC::FormDataReference&&, String&& referrer);
>+    void startFetch(WebCore::SWServerConnectionIdentifier, WebCore::ServiceWorkerIdentifier, WebCore::FetchIdentifier, WebCore::ResourceRequest&&, WebCore::FetchOptions&&, IPC::FormDataReference&&, String&& referrer);
>+    void cancelFetch(WebCore::SWServerConnectionIdentifier, WebCore::ServiceWorkerIdentifier, WebCore::FetchIdentifier);
>     void postMessageToServiceWorker(WebCore::ServiceWorkerIdentifier destinationIdentifier, WebCore::MessageWithMessagePorts&&, WebCore::ServiceWorkerOrClientData&& sourceData);
>     void fireInstallEvent(WebCore::ServiceWorkerIdentifier);
>     void fireActivateEvent(WebCore::ServiceWorkerIdentifier);
>diff --git a/Source/WebKit/WebProcess/Storage/WebSWContextManagerConnection.messages.in b/Source/WebKit/WebProcess/Storage/WebSWContextManagerConnection.messages.in
>index 27bee323ebb9acdc30fb2f68a260e2cb497df4cd..be0d593a68a791f14586f6f950c2d679ebe5e01b 100644
>--- a/Source/WebKit/WebProcess/Storage/WebSWContextManagerConnection.messages.in
>+++ b/Source/WebKit/WebProcess/Storage/WebSWContextManagerConnection.messages.in
>@@ -24,7 +24,8 @@
> 
> messages -> WebSWContextManagerConnection {
>     InstallServiceWorker(struct WebCore::ServiceWorkerContextData contextData, PAL::SessionID sessionID)
>-    StartFetch(WebCore::SWServerConnectionIdentifier serverConnectionIdentifier, uint64_t fetchIdentifier, WebCore::ServiceWorkerIdentifier serviceWorkerIdentifier, WebCore::ResourceRequest request, struct WebCore::FetchOptions options, IPC::FormDataReference requestBody, String referrer)
>+    StartFetch(WebCore::SWServerConnectionIdentifier serverConnectionIdentifier, WebCore::ServiceWorkerIdentifier serviceWorkerIdentifier, WebCore::FetchIdentifier fetchIdentifier, WebCore::ResourceRequest request, struct WebCore::FetchOptions options, IPC::FormDataReference requestBody, String referrer)
>+    CancelFetch(WebCore::SWServerConnectionIdentifier serverConnectionIdentifier, WebCore::ServiceWorkerIdentifier serviceWorkerIdentifier, WebCore::FetchIdentifier fetchIdentifier)
>     PostMessageToServiceWorker(WebCore::ServiceWorkerIdentifier destinationIdentifier, struct WebCore::MessageWithMessagePorts message, WebCore::ServiceWorkerOrClientData sourceData)
>     FireInstallEvent(WebCore::ServiceWorkerIdentifier identifier)
>     FireActivateEvent(WebCore::ServiceWorkerIdentifier identifier)
>diff --git a/Source/WebKit/WebProcess/Storage/WebServiceWorkerFetchTaskClient.cpp b/Source/WebKit/WebProcess/Storage/WebServiceWorkerFetchTaskClient.cpp
>index fa243c454817899697bf04a3382f340fac3677ce..4e44506362f43503784bae3592bd623ef20551ab 100644
>--- a/Source/WebKit/WebProcess/Storage/WebServiceWorkerFetchTaskClient.cpp
>+++ b/Source/WebKit/WebProcess/Storage/WebServiceWorkerFetchTaskClient.cpp
>@@ -46,11 +46,11 @@ WebServiceWorkerFetchTaskClient::~WebServiceWorkerFetchTaskClient()
>         RunLoop::main().dispatch([connection = WTFMove(m_connection)] { });
> }
> 
>-WebServiceWorkerFetchTaskClient::WebServiceWorkerFetchTaskClient(Ref<IPC::Connection>&& connection, WebCore::ServiceWorkerIdentifier serviceWorkerIdentifier, WebCore::SWServerConnectionIdentifier serverConnectionIdentifier, uint64_t fetchTaskIdentifier)
>+WebServiceWorkerFetchTaskClient::WebServiceWorkerFetchTaskClient(Ref<IPC::Connection>&& connection, WebCore::ServiceWorkerIdentifier serviceWorkerIdentifier, WebCore::SWServerConnectionIdentifier serverConnectionIdentifier, FetchIdentifier fetchIdentifier)
>     : m_connection(WTFMove(connection))
>     , m_serverConnectionIdentifier(serverConnectionIdentifier)
>     , m_serviceWorkerIdentifier(serviceWorkerIdentifier)
>-    , m_fetchTaskIdentifier(fetchTaskIdentifier)
>+    , m_fetchIdentifier(fetchIdentifier)
> {
> }
> 
>@@ -58,7 +58,7 @@ void WebServiceWorkerFetchTaskClient::didReceiveResponse(const ResourceResponse&
> {
>     if (!m_connection)
>         return;
>-    m_connection->send(Messages::StorageProcess::DidReceiveFetchResponse { m_serverConnectionIdentifier, m_fetchTaskIdentifier, response }, 0);
>+    m_connection->send(Messages::StorageProcess::DidReceiveFetchResponse { m_serverConnectionIdentifier, m_fetchIdentifier, response }, 0);
> }
> 
> void WebServiceWorkerFetchTaskClient::didReceiveData(Ref<SharedBuffer>&& buffer)
>@@ -66,7 +66,7 @@ void WebServiceWorkerFetchTaskClient::didReceiveData(Ref<SharedBuffer>&& buffer)
>     if (!m_connection)
>         return;
>     IPC::SharedBufferDataReference dataReference { buffer.ptr() };
>-    m_connection->send(Messages::StorageProcess::DidReceiveFetchData { m_serverConnectionIdentifier, m_fetchTaskIdentifier, dataReference, static_cast<int64_t>(buffer->size()) }, 0);
>+    m_connection->send(Messages::StorageProcess::DidReceiveFetchData { m_serverConnectionIdentifier, m_fetchIdentifier, dataReference, static_cast<int64_t>(buffer->size()) }, 0);
> }
> 
> void WebServiceWorkerFetchTaskClient::didReceiveFormDataAndFinish(Ref<FormData>&& formData)
>@@ -78,7 +78,7 @@ void WebServiceWorkerFetchTaskClient::didReceiveFormDataAndFinish(Ref<FormData>&
>     // For now and for the case of blobs, we read it there and send the data through IPC.
>     URL blobURL = formData->asBlobURL();
>     if (blobURL.isNull()) {
>-        m_connection->send(Messages::StorageProcess::DidReceiveFetchFormData { m_serverConnectionIdentifier, m_fetchTaskIdentifier, IPC::FormDataReference { WTFMove(formData) } }, 0);
>+        m_connection->send(Messages::StorageProcess::DidReceiveFetchFormData { m_serverConnectionIdentifier, m_fetchIdentifier, IPC::FormDataReference { WTFMove(formData) } }, 0);
>         return;
>     }
> 
>@@ -107,7 +107,7 @@ void WebServiceWorkerFetchTaskClient::didReceiveBlobChunk(const char* data, size
>         return;
> 
>     IPC::DataReference dataReference { reinterpret_cast<const uint8_t*>(data), size };
>-    m_connection->send(Messages::StorageProcess::DidReceiveFetchData { m_serverConnectionIdentifier, m_fetchTaskIdentifier, dataReference, static_cast<int64_t>(size) }, 0);
>+    m_connection->send(Messages::StorageProcess::DidReceiveFetchData { m_serverConnectionIdentifier, m_fetchIdentifier, dataReference, static_cast<int64_t>(size) }, 0);
> }
> 
> void WebServiceWorkerFetchTaskClient::didFinishBlobLoading()
>@@ -121,8 +121,10 @@ void WebServiceWorkerFetchTaskClient::didFail()
> {
>     if (!m_connection)
>         return;
>-    m_connection->send(Messages::StorageProcess::DidFailFetch { m_serverConnectionIdentifier, m_fetchTaskIdentifier }, 0);
>-    m_connection = nullptr;
>+
>+    m_connection->send(Messages::StorageProcess::DidFailFetch { m_serverConnectionIdentifier, m_fetchIdentifier }, 0);
>+
>+    cleanup();
> }
> 
> void WebServiceWorkerFetchTaskClient::didFinish()
>@@ -130,16 +132,39 @@ void WebServiceWorkerFetchTaskClient::didFinish()
>     if (!m_connection)
>         return;
> 
>-    m_connection->send(Messages::StorageProcess::DidFinishFetch { m_serverConnectionIdentifier, m_fetchTaskIdentifier }, 0);
>-    m_connection = nullptr;
>+    m_connection->send(Messages::StorageProcess::DidFinishFetch { m_serverConnectionIdentifier, m_fetchIdentifier }, 0);
>+
>+    cleanup();
> }
> 
> void WebServiceWorkerFetchTaskClient::didNotHandle()
> {
>     if (!m_connection)
>         return;
>-    m_connection->send(Messages::StorageProcess::DidNotHandleFetch { m_serverConnectionIdentifier, m_fetchTaskIdentifier }, 0);
>+
>+    m_connection->send(Messages::StorageProcess::DidNotHandleFetch { m_serverConnectionIdentifier, m_fetchIdentifier }, 0);
>+
>+    cleanup();
>+}
>+
>+void WebServiceWorkerFetchTaskClient::cancel()
>+{
>+    m_connection = nullptr;
>+}
>+
>+void WebServiceWorkerFetchTaskClient::cleanup()
>+{
>+    ASSERT(m_connection);
>     m_connection = nullptr;
>+
>+    if (!isMainThread()) {
>+        callOnMainThread([protectedThis = makeRef(*this)] () {
>+            protectedThis->cleanup();
>+        });
>+        return;
>+    }
>+    if (auto* serviceWorkerThreadProxy = SWContextManager::singleton().serviceWorkerThreadProxy(m_serviceWorkerIdentifier))
>+        serviceWorkerThreadProxy->removeFetch(m_serverConnectionIdentifier, m_fetchIdentifier);
> }
> 
> } // namespace WebKit
>diff --git a/Source/WebKit/WebProcess/Storage/WebServiceWorkerFetchTaskClient.h b/Source/WebKit/WebProcess/Storage/WebServiceWorkerFetchTaskClient.h
>index e785ad0bde70d5c3a9db0e4c983002a9f4bcb9d6..1a8daca78945a019047f0f8204169943481dddb6 100644
>--- a/Source/WebKit/WebProcess/Storage/WebServiceWorkerFetchTaskClient.h
>+++ b/Source/WebKit/WebProcess/Storage/WebServiceWorkerFetchTaskClient.h
>@@ -28,6 +28,7 @@
> #if ENABLE(SERVICE_WORKER)
> 
> #include "Connection.h"
>+#include <WebCore/FetchIdentifier.h>
> #include <WebCore/FetchLoader.h>
> #include <WebCore/FetchLoaderClient.h>
> #include <WebCore/ServiceWorkerFetch.h>
>@@ -37,7 +38,7 @@ namespace WebKit {
> 
> class WebServiceWorkerFetchTaskClient final : public WebCore::ServiceWorkerFetch::Client {
> public:
>-    static Ref<WebServiceWorkerFetchTaskClient> create(Ref<IPC::Connection>&& connection, WebCore::ServiceWorkerIdentifier serviceWorkerIdentifier,  WebCore::SWServerConnectionIdentifier serverConnectionIdentifier, uint64_t fetchTaskIdentifier)
>+    static Ref<WebServiceWorkerFetchTaskClient> create(Ref<IPC::Connection>&& connection, WebCore::ServiceWorkerIdentifier serviceWorkerIdentifier,  WebCore::SWServerConnectionIdentifier serverConnectionIdentifier, WebCore::FetchIdentifier fetchTaskIdentifier)
>     {
>         return adoptRef(*new WebServiceWorkerFetchTaskClient(WTFMove(connection), serviceWorkerIdentifier, serverConnectionIdentifier, fetchTaskIdentifier));
>     }
>@@ -45,7 +46,7 @@ public:
>     ~WebServiceWorkerFetchTaskClient();
> 
> private:
>-    WebServiceWorkerFetchTaskClient(Ref<IPC::Connection>&&, WebCore::ServiceWorkerIdentifier, WebCore::SWServerConnectionIdentifier, uint64_t fetchTaskIdentifier);
>+    WebServiceWorkerFetchTaskClient(Ref<IPC::Connection>&&, WebCore::ServiceWorkerIdentifier, WebCore::SWServerConnectionIdentifier, WebCore::FetchIdentifier);
> 
>     void didReceiveResponse(const WebCore::ResourceResponse&) final;
>     void didReceiveData(Ref<WebCore::SharedBuffer>&&) final;
>@@ -53,7 +54,10 @@ private:
>     void didFail() final;
>     void didFinish() final;
>     void didNotHandle() final;
>+    void cancel() final;
> 
>+    void cleanup();
>+    
>     void didReceiveBlobChunk(const char* data, size_t size);
>     void didFinishBlobLoading();
> 
>@@ -73,7 +77,7 @@ private:
>     RefPtr<IPC::Connection> m_connection;
>     WebCore::SWServerConnectionIdentifier m_serverConnectionIdentifier;
>     WebCore::ServiceWorkerIdentifier m_serviceWorkerIdentifier;
>-    uint64_t m_fetchTaskIdentifier { 0 };
>+    WebCore::FetchIdentifier m_fetchIdentifier;
>     std::optional<BlobLoader> m_blobLoader;
> };
> 
>diff --git a/Source/WebKit/WebProcess/Storage/WebServiceWorkerProvider.cpp b/Source/WebKit/WebProcess/Storage/WebServiceWorkerProvider.cpp
>index cff9a54fb7733f12cc660c4398a3dd7a8c26e943..a870a18c3f7f0181c430016807d1412a978254d6 100644
>--- a/Source/WebKit/WebProcess/Storage/WebServiceWorkerProvider.cpp
>+++ b/Source/WebKit/WebProcess/Storage/WebServiceWorkerProvider.cpp
>@@ -88,20 +88,21 @@ void WebServiceWorkerProvider::handleFetch(ResourceLoader& loader, CachedResourc
>     }
> 
>     auto& connection = WebProcess::singleton().ensureWebToStorageProcessConnection(sessionID).serviceWorkerConnectionForSession(sessionID);
>-    m_ongoingFetchTasks.add(loader.identifier(), ServiceWorkerClientFetch::create(*this, loader, loader.identifier(), connection, shouldClearReferrerOnHTTPSToHTTPRedirect, WTFMove(callback)));
>+    auto fetchIdentifier = makeObjectIdentifier<FetchIdentifierType>(loader.identifier());
>+    m_ongoingFetchTasks.add(fetchIdentifier.toUInt64(), ServiceWorkerClientFetch::create(*this, loader, fetchIdentifier, connection, shouldClearReferrerOnHTTPSToHTTPRedirect, WTFMove(callback)));
> }
> 
>-bool WebServiceWorkerProvider::cancelFetch(uint64_t fetchIdentifier)
>+bool WebServiceWorkerProvider::cancelFetch(FetchIdentifier fetchIdentifier)
> {
>-    auto fetch = m_ongoingFetchTasks.take(fetchIdentifier);
>+    auto fetch = m_ongoingFetchTasks.take(fetchIdentifier.toUInt64());
>     if (fetch)
>         (*fetch)->cancel();
>     return !!fetch;
> }
> 
>-void WebServiceWorkerProvider::fetchFinished(uint64_t fetchIdentifier)
>+void WebServiceWorkerProvider::fetchFinished(FetchIdentifier fetchIdentifier)
> {
>-    m_ongoingFetchTasks.take(fetchIdentifier);
>+    m_ongoingFetchTasks.take(fetchIdentifier.toUInt64());
> }
> 
> void WebServiceWorkerProvider::didReceiveServiceWorkerClientFetchMessage(IPC::Connection& connection, IPC::Decoder& decoder)
>diff --git a/Source/WebKit/WebProcess/Storage/WebServiceWorkerProvider.h b/Source/WebKit/WebProcess/Storage/WebServiceWorkerProvider.h
>index c41102329e340874e2bb63375e8ac8c2d7fbfe18..d3c5caa8c7f5b9bbe6501217900536de8efcb9d7 100644
>--- a/Source/WebKit/WebProcess/Storage/WebServiceWorkerProvider.h
>+++ b/Source/WebKit/WebProcess/Storage/WebServiceWorkerProvider.h
>@@ -42,8 +42,8 @@ public:
>     static WebServiceWorkerProvider& singleton();
> 
>     void handleFetch(WebCore::ResourceLoader&, WebCore::CachedResource*, PAL::SessionID, bool shouldClearReferrerOnHTTPSToHTTPRedirect, ServiceWorkerClientFetch::Callback&&);
>-    bool cancelFetch(uint64_t fetchIdentifier);
>-    void fetchFinished(uint64_t fetchIdentifier);
>+    bool cancelFetch(WebCore::FetchIdentifier);
>+    void fetchFinished(WebCore::FetchIdentifier);
> 
>     void didReceiveServiceWorkerClientFetchMessage(IPC::Connection&, IPC::Decoder&);
>     void didReceiveServiceWorkerClientRegistrationMatch(IPC::Connection&, IPC::Decoder&);

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Attachments on bug 185274: 339546 | 339556 | 339563 | 339757 | 339767 | 339793 | 339804 | 339954 | 339981 | 339999