Source/WebKit/UIProcess/Network/NetworkProcessProxy.cpp

   1 /*
   2  * Copyright (C) 2012-2016 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
  14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  23  * THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "config.h"
  27 #include "NetworkProcessProxy.h"
  28
  29 #include "AuthenticationChallengeProxy.h"
  30 #include "DownloadProxyMessages.h"
  31 #if ENABLE(LEGACY_CUSTOM_PROTOCOL_MANAGER)
  32 #include "LegacyCustomProtocolManagerProxyMessages.h"
  33 #endif
  34 #include "Logging.h"
  35 #include "NetworkProcessCreationParameters.h"
  36 #include "NetworkProcessMessages.h"
  37 #include "SandboxExtension.h"
  38 #include "StorageProcessMessages.h"
  39 #include "WebPageProxy.h"
  40 #include "WebProcessMessages.h"
  41 #include "WebProcessPool.h"
  42 #include "WebsiteData.h"
  43 #include <wtf/CompletionHandler.h>
  44
  45 #if ENABLE(SEC_ITEM_SHIM)
  46 #include "SecItemShimProxy.h"
  47 #endif
  48
  49 #if PLATFORM(IOS)
  50 #include <wtf/spi/darwin/XPCSPI.h>
  51 #endif
  52
  53 #define MESSAGE_CHECK(assertion) MESSAGE_CHECK_BASE(assertion, connection())
  54
  55 using namespace WebCore;
  56
  57 namespace WebKit {
  58
  59 static uint64_t generateCallbackID()
  60 {
  61     static uint64_t callbackID;
  62
  63     return ++callbackID;
  64 }
  65
  66 Ref<NetworkProcessProxy> NetworkProcessProxy::create(WebProcessPool& processPool)
  67 {
  68     return adoptRef(*new NetworkProcessProxy(processPool));
  69 }
  70
  71 NetworkProcessProxy::NetworkProcessProxy(WebProcessPool& processPool)
  72     : ChildProcessProxy(processPool.alwaysRunsAtBackgroundPriority())
  73     , m_processPool(processPool)
  74     , m_numPendingConnectionRequests(0)
  75 #if ENABLE(LEGACY_CUSTOM_PROTOCOL_MANAGER)
  76     , m_customProtocolManagerProxy(*this)
  77 #endif
  78     , m_throttler(*this, processPool.shouldTakeUIBackgroundAssertion())
  79 {
  80     connect();
  81 }
  82
  83 NetworkProcessProxy::~NetworkProcessProxy()
  84 {
  85     ASSERT(m_pendingFetchWebsiteDataCallbacks.isEmpty());
  86     ASSERT(m_pendingDeleteWebsiteDataCallbacks.isEmpty());
  87     ASSERT(m_pendingDeleteWebsiteDataForOriginsCallbacks.isEmpty());
  88 }
  89
  90 void NetworkProcessProxy::getLaunchOptions(ProcessLauncher::LaunchOptions& launchOptions)
  91 {
  92     launchOptions.processType = ProcessLauncher::ProcessType::Network;
  93     ChildProcessProxy::getLaunchOptions(launchOptions);
  94 }
  95
  96 void NetworkProcessProxy::connectionWillOpen(IPC::Connection& connection)
  97 {
  98 #if ENABLE(SEC_ITEM_SHIM)
  99     SecItemShimProxy::singleton().initializeConnection(connection);
 100 #else
 101     UNUSED_PARAM(connection);
 102 #endif
 103 }
 104
 105 void NetworkProcessProxy::processWillShutDown(IPC::Connection& connection)
 106 {
 107     ASSERT_UNUSED(connection, this->connection() == &connection);
 108 }
 109
 110 void NetworkProcessProxy::getNetworkProcessConnection(Ref<Messages::WebProcessProxy::GetNetworkProcessConnection::DelayedReply>&& reply)
 111 {
 112     m_pendingConnectionReplies.append(WTFMove(reply));
 113
 114     if (state() == State::Launching) {
 115         m_numPendingConnectionRequests++;
 116         return;
 117     }
 118
 119     connection()->send(Messages::NetworkProcess::CreateNetworkConnectionToWebProcess(), 0, IPC::SendOption::DispatchMessageEvenWhenWaitingForSyncReply);
 120 }
 121
 122 DownloadProxy* NetworkProcessProxy::createDownloadProxy(const ResourceRequest& resourceRequest)
 123 {
 124     if (!m_downloadProxyMap)
 125         m_downloadProxyMap = std::make_unique<DownloadProxyMap>(this);
 126
 127     return m_downloadProxyMap->createDownloadProxy(m_processPool, resourceRequest);
 128 }
 129
 130 void NetworkProcessProxy::fetchWebsiteData(PAL::SessionID sessionID, OptionSet<WebsiteDataType> dataTypes, OptionSet<WebsiteDataFetchOption> fetchOptions, WTF::Function<void (WebsiteData)>&& completionHandler)
 131 {
 132     ASSERT(canSendMessage());
 133
 134     uint64_t callbackID = generateCallbackID();
 135     RELEASE_LOG_IF(sessionID.isAlwaysOnLoggingAllowed(), ProcessSuspension, "%p - NetworkProcessProxy is taking a background assertion because the Network process is fetching Website data", this);
 136
 137     m_pendingFetchWebsiteDataCallbacks.add(callbackID, [this, token = throttler().backgroundActivityToken(), completionHandler = WTFMove(completionHandler), sessionID](WebsiteData websiteData) {
 138         completionHandler(WTFMove(websiteData));
 139         RELEASE_LOG_IF(sessionID.isAlwaysOnLoggingAllowed(), ProcessSuspension, "%p - NetworkProcessProxy is releasing a background assertion because the Network process is done fetching Website data", this);
 140     });
 141
 142     send(Messages::NetworkProcess::FetchWebsiteData(sessionID, dataTypes, fetchOptions, callbackID), 0);
 143 }
 144
 145 void NetworkProcessProxy::deleteWebsiteData(PAL::SessionID sessionID, OptionSet<WebsiteDataType> dataTypes, WallTime modifiedSince, WTF::Function<void ()>&& completionHandler)
 146 {
 147     auto callbackID = generateCallbackID();
 148     RELEASE_LOG_IF(sessionID.isAlwaysOnLoggingAllowed(), ProcessSuspension, "%p - NetworkProcessProxy is taking a background assertion because the Network process is deleting Website data", this);
 149
 150     m_pendingDeleteWebsiteDataCallbacks.add(callbackID, [this, token = throttler().backgroundActivityToken(), completionHandler = WTFMove(completionHandler), sessionID] {
 151         completionHandler();
 152         RELEASE_LOG_IF(sessionID.isAlwaysOnLoggingAllowed(), ProcessSuspension, "%p - NetworkProcessProxy is releasing a background assertion because the Network process is done deleting Website data", this);
 153     });
 154     send(Messages::NetworkProcess::DeleteWebsiteData(sessionID, dataTypes, modifiedSince, callbackID), 0);
 155 }
 156
 157 void NetworkProcessProxy::deleteWebsiteDataForOrigins(PAL::SessionID sessionID, OptionSet<WebsiteDataType> dataTypes, const Vector<WebCore::SecurityOriginData>& origins, const Vector<String>& cookieHostNames, WTF::Function<void()>&& completionHandler)
 158 {
 159     ASSERT(canSendMessage());
 160
 161     uint64_t callbackID = generateCallbackID();
 162     RELEASE_LOG_IF(sessionID.isAlwaysOnLoggingAllowed(), ProcessSuspension, "%p - NetworkProcessProxy is taking a background assertion because the Network process is deleting Website data for several origins", this);
 163
 164     m_pendingDeleteWebsiteDataForOriginsCallbacks.add(callbackID, [this, token = throttler().backgroundActivityToken(), completionHandler = WTFMove(completionHandler), sessionID] {
 165         completionHandler();
 166         RELEASE_LOG_IF(sessionID.isAlwaysOnLoggingAllowed(), ProcessSuspension, "%p - NetworkProcessProxy is releasing a background assertion because the Network process is done deleting Website data for several origins", this);
 167     });
 168
 169     send(Messages::NetworkProcess::DeleteWebsiteDataForOrigins(sessionID, dataTypes, origins, cookieHostNames, callbackID), 0);
 170 }
 171
 172 void NetworkProcessProxy::networkProcessCrashed()
 173 {
 174     clearCallbackStates();
 175
 176     Vector<Ref<Messages::WebProcessProxy::GetNetworkProcessConnection::DelayedReply>> pendingReplies;
 177     pendingReplies.reserveInitialCapacity(m_pendingConnectionReplies.size());
 178     for (auto& reply : m_pendingConnectionReplies)
 179         pendingReplies.append(WTFMove(reply));
 180
 181     // Tell the network process manager to forget about this network process proxy. This may cause us to be deleted.
 182     m_processPool.networkProcessCrashed(*this, WTFMove(pendingReplies));
 183 }
 184
 185 void NetworkProcessProxy::networkProcessFailedToLaunch()
 186 {
 187     // The network process must have crashed or exited, send any pending sync replies we might have.
 188     while (!m_pendingConnectionReplies.isEmpty()) {
 189         Ref<Messages::WebProcessProxy::GetNetworkProcessConnection::DelayedReply> reply = m_pendingConnectionReplies.takeFirst();
 190
 191 #if USE(UNIX_DOMAIN_SOCKETS)
 192         reply->send(IPC::Attachment());
 193 #elif OS(DARWIN)
 194         reply->send(IPC::Attachment(0, MACH_MSG_TYPE_MOVE_SEND));
 195 #else
 196         notImplemented();
 197 #endif
 198     }
 199     clearCallbackStates();
 200     // Tell the network process manager to forget about this network process proxy. This may cause us to be deleted.
 201     m_processPool.networkProcessFailedToLaunch(*this);
 202 }
 203
 204 void NetworkProcessProxy::clearCallbackStates()
 205 {
 206     for (const auto& callback : m_pendingFetchWebsiteDataCallbacks.values())
 207         callback(WebsiteData());
 208     m_pendingFetchWebsiteDataCallbacks.clear();
 209
 210     for (const auto& callback : m_pendingDeleteWebsiteDataCallbacks.values())
 211         callback();
 212     m_pendingDeleteWebsiteDataCallbacks.clear();
 213
 214     for (const auto& callback : m_pendingDeleteWebsiteDataForOriginsCallbacks.values())
 215         callback();
 216     m_pendingDeleteWebsiteDataForOriginsCallbacks.clear();
 217 }
 218
 219 void NetworkProcessProxy::didReceiveMessage(IPC::Connection& connection, IPC::Decoder& decoder)
 220 {
 221     if (dispatchMessage(connection, decoder))
 222         return;
 223
 224     if (m_processPool.dispatchMessage(connection, decoder))
 225         return;
 226
 227     didReceiveNetworkProcessProxyMessage(connection, decoder);
 228 }
 229
 230 void NetworkProcessProxy::didReceiveSyncMessage(IPC::Connection& connection, IPC::Decoder& decoder, std::unique_ptr<IPC::Encoder>& replyEncoder)
 231 {
 232     if (dispatchSyncMessage(connection, decoder, replyEncoder))
 233         return;
 234
 235     ASSERT_NOT_REACHED();
 236 }
 237
 238 void NetworkProcessProxy::didClose(IPC::Connection&)
 239 {
 240     if (m_downloadProxyMap)
 241         m_downloadProxyMap->processDidClose();
 242 #if ENABLE(LEGACY_CUSTOM_PROTOCOL_MANAGER)
 243     m_customProtocolManagerProxy.invalidate();
 244 #endif
 245
 246     m_tokenForHoldingLockedFiles = nullptr;
 247
 248     for (auto& callback : m_writeBlobToFilePathCallbackMap.values())
 249         callback(false);
 250     m_writeBlobToFilePathCallbackMap.clear();
 251
 252     // This may cause us to be deleted.
 253     networkProcessCrashed();
 254 }
 255
 256 void NetworkProcessProxy::didReceiveInvalidMessage(IPC::Connection&, IPC::StringReference, IPC::StringReference)
 257 {
 258 }
 259
 260 void NetworkProcessProxy::didCreateNetworkConnectionToWebProcess(const IPC::Attachment& connectionIdentifier)
 261 {
 262     ASSERT(!m_pendingConnectionReplies.isEmpty());
 263
 264     // Grab the first pending connection reply.
 265     RefPtr<Messages::WebProcessProxy::GetNetworkProcessConnection::DelayedReply> reply = m_pendingConnectionReplies.takeFirst();
 266
 267 #if USE(UNIX_DOMAIN_SOCKETS)
 268     reply->send(connectionIdentifier);
 269 #elif OS(DARWIN)
 270     reply->send(IPC::Attachment(connectionIdentifier.port(), MACH_MSG_TYPE_MOVE_SEND));
 271 #else
 272     notImplemented();
 273 #endif
 274 }
 275
 276 void NetworkProcessProxy::didReceiveAuthenticationChallenge(uint64_t pageID, uint64_t frameID, const WebCore::AuthenticationChallenge& coreChallenge, uint64_t challengeID)
 277 {
 278 #if ENABLE(SERVICE_WORKER)
 279     if (m_processPool.isServiceWorker(pageID)) {
 280         auto authenticationChallenge = AuthenticationChallengeProxy::create(coreChallenge, challengeID, connection());
 281         m_processPool.serviceWorkerProxy()->didReceiveAuthenticationChallenge(pageID, frameID, WTFMove(authenticationChallenge));
 282         return;
 283     }
 284 #endif
 285
 286     WebPageProxy* page = WebProcessProxy::webPage(pageID);
 287     MESSAGE_CHECK(page);
 288
 289     auto authenticationChallenge = AuthenticationChallengeProxy::create(coreChallenge, challengeID, connection());
 290     page->didReceiveAuthenticationChallengeProxy(frameID, WTFMove(authenticationChallenge));
 291 }
 292
 293 void NetworkProcessProxy::didFetchWebsiteData(uint64_t callbackID, const WebsiteData& websiteData)
 294 {
 295     auto callback = m_pendingFetchWebsiteDataCallbacks.take(callbackID);
 296     callback(websiteData);
 297 }
 298
 299 void NetworkProcessProxy::didDeleteWebsiteData(uint64_t callbackID)
 300 {
 301     auto callback = m_pendingDeleteWebsiteDataCallbacks.take(callbackID);
 302     callback();
 303 }
 304
 305 void NetworkProcessProxy::didDeleteWebsiteDataForOrigins(uint64_t callbackID)
 306 {
 307     auto callback = m_pendingDeleteWebsiteDataForOriginsCallbacks.take(callbackID);
 308     callback();
 309 }
 310
 311 void NetworkProcessProxy::grantSandboxExtensionsToStorageProcessForBlobs(uint64_t requestID, const Vector<String>& paths)
 312 {
 313 #if ENABLE(SANDBOX_EXTENSIONS)
 314     SandboxExtension::HandleArray extensions;
 315     extensions.allocate(paths.size());
 316     for (size_t i = 0; i < paths.size(); ++i) {
 317         // ReadWrite is required for creating hard links as well as deleting the temporary file, which the StorageProcess will do.
 318         SandboxExtension::createHandle(paths[i], SandboxExtension::Type::ReadWrite, extensions[i]);
 319     }
 320
 321     m_processPool.sendToStorageProcessRelaunchingIfNecessary(Messages::StorageProcess::GrantSandboxExtensionsForBlobs(paths, extensions));
 322 #endif
 323     connection()->send(Messages::NetworkProcess::DidGrantSandboxExtensionsToStorageProcessForBlobs(requestID), 0);
 324 }
 325
 326 void NetworkProcessProxy::didFinishLaunching(ProcessLauncher* launcher, IPC::Connection::Identifier connectionIdentifier)
 327 {
 328     ChildProcessProxy::didFinishLaunching(launcher, connectionIdentifier);
 329
 330     if (IPC::Connection::identifierIsNull(connectionIdentifier)) {
 331         networkProcessFailedToLaunch();
 332         return;
 333     }
 334
 335     for (unsigned i = 0; i < m_numPendingConnectionRequests; ++i)
 336         connection()->send(Messages::NetworkProcess::CreateNetworkConnectionToWebProcess(), 0);
 337
 338     m_numPendingConnectionRequests = 0;
 339
 340 #if PLATFORM(COCOA)
 341     if (m_processPool.processSuppressionEnabled())
 342         setProcessSuppressionEnabled(true);
 343 #endif
 344
 345 #if PLATFORM(IOS)
 346     if (xpc_connection_t connection = this->connection()->xpcConnection())
 347         m_throttler.didConnectToProcess(xpc_connection_get_pid(connection));
 348 #endif
 349 }
 350
 351 void NetworkProcessProxy::logDiagnosticMessage(uint64_t pageID, const String& message, const String& description, WebCore::ShouldSample shouldSample)
 352 {
 353     WebPageProxy* page = WebProcessProxy::webPage(pageID);
 354     // FIXME: We do this null-check because by the time the decision to log is made, the page may be gone. We should refactor to avoid this,
 355     // but for now we simply drop the message in the rare case this happens.
 356     if (!page)
 357         return;
 358
 359     page->logDiagnosticMessage(message, description, shouldSample);
 360 }
 361
 362 void NetworkProcessProxy::logDiagnosticMessageWithResult(uint64_t pageID, const String& message, const String& description, uint32_t result, WebCore::ShouldSample shouldSample)
 363 {
 364     WebPageProxy* page = WebProcessProxy::webPage(pageID);
 365     // FIXME: We do this null-check because by the time the decision to log is made, the page may be gone. We should refactor to avoid this,
 366     // but for now we simply drop the message in the rare case this happens.
 367     if (!page)
 368         return;
 369
 370     page->logDiagnosticMessageWithResult(message, description, result, shouldSample);
 371 }
 372
 373 void NetworkProcessProxy::logDiagnosticMessageWithValue(uint64_t pageID, const String& message, const String& description, double value, unsigned significantFigures, WebCore::ShouldSample shouldSample)
 374 {
 375     WebPageProxy* page = WebProcessProxy::webPage(pageID);
 376     // FIXME: We do this null-check because by the time the decision to log is made, the page may be gone. We should refactor to avoid this,
 377     // but for now we simply drop the message in the rare case this happens.
 378     if (!page)
 379         return;
 380
 381     page->logDiagnosticMessageWithValue(message, description, value, significantFigures, shouldSample);
 382 }
 383
 384 #if USE(PROTECTION_SPACE_AUTH_CALLBACK)
 385 void NetworkProcessProxy::canAuthenticateAgainstProtectionSpace(uint64_t loaderID, uint64_t pageID, uint64_t frameID, const WebCore::ProtectionSpace& protectionSpace)
 386 {
 387     // NetworkProcess state cannot asynchronously be kept in sync with these objects
 388     // like we expect WebProcess <-> UIProcess state to be kept in sync.
 389     // So there's no guarantee the messaged WebPageProxy or WebFrameProxy exist here in the UIProcess.
 390     // We need to validate both the page and the frame up front.
 391     if (auto* page = WebProcessProxy::webPage(pageID)) {
 392         if (page->process().webFrame(frameID)) {
 393             page->canAuthenticateAgainstProtectionSpace(loaderID, frameID, protectionSpace);
 394             return;
 395         }
 396 #if ENABLE(SERVICE_WORKER)
 397     } else if (m_processPool.isServiceWorker(pageID)) {
 398         send(Messages::NetworkProcess::ContinueCanAuthenticateAgainstProtectionSpace(loaderID, true), 0);
 399         return;
 400 #endif
 401     }
 402     // In the case where we will not be able to reply to this message with a client reply,
 403     // we should message back a default to the Networking process.
 404     send(Messages::NetworkProcess::ContinueCanAuthenticateAgainstProtectionSpace(loaderID, false), 0);
 405 }
 406 #endif
 407
 408 #if HAVE(CFNETWORK_STORAGE_PARTITIONING)
 409 static uint64_t nextRequestStorageAccessContextId()
 410 {
 411     static uint64_t nextContextId = 0;
 412     return ++nextContextId;
 413 }
 414
 415 void NetworkProcessProxy::hasStorageAccessForPrevalentDomains(PAL::SessionID sessionID, const String& resourceDomain, const String& firstPartyDomain, uint64_t frameID, uint64_t pageID, WTF::CompletionHandler<void(bool)>&& callback)
 416 {
 417     auto contextId = nextRequestStorageAccessContextId();
 418     auto addResult = m_storageAccessResponseCallbackMap.add(contextId, WTFMove(callback));
 419     ASSERT_UNUSED(addResult, addResult.isNewEntry);
 420     send(Messages::NetworkProcess::HasStorageAccessForPrevalentDomains(sessionID, resourceDomain, firstPartyDomain, frameID, pageID, contextId), 0);
 421 }
 422
 423 void NetworkProcessProxy::updateStorageAccessForPrevalentDomains(PAL::SessionID sessionID, const String& resourceDomain, const String& firstPartyDomain, uint64_t frameID, uint64_t pageID, bool value, WTF::CompletionHandler<void(bool)>&& callback)
 424 {
 425     auto contextId = nextRequestStorageAccessContextId();
 426     auto addResult = m_storageAccessResponseCallbackMap.add(contextId, WTFMove(callback));
 427     ASSERT_UNUSED(addResult, addResult.isNewEntry);
 428     send(Messages::NetworkProcess::UpdateStorageAccessForPrevalentDomains(sessionID, resourceDomain, firstPartyDomain, frameID, pageID, value, contextId), 0);
 429 }
 430
 431 void NetworkProcessProxy::storageAccessRequestResult(bool wasGranted, uint64_t contextId)
 432 {
 433     auto callback = m_storageAccessResponseCallbackMap.take(contextId);
 434     callback(wasGranted);
 435 }
 436 #endif
 437
 438 void NetworkProcessProxy::sendProcessWillSuspendImminently()
 439 {
 440     if (!canSendMessage())
 441         return;
 442
 443     bool handled = false;
 444     sendSync(Messages::NetworkProcess::ProcessWillSuspendImminently(), Messages::NetworkProcess::ProcessWillSuspendImminently::Reply(handled), 0, 1_s);
 445 }
 446
 447 void NetworkProcessProxy::sendPrepareToSuspend()
 448 {
 449     if (canSendMessage())
 450         send(Messages::NetworkProcess::PrepareToSuspend(), 0);
 451 }
 452
 453 void NetworkProcessProxy::sendCancelPrepareToSuspend()
 454 {
 455     if (canSendMessage())
 456         send(Messages::NetworkProcess::CancelPrepareToSuspend(), 0);
 457 }
 458
 459 void NetworkProcessProxy::sendProcessDidResume()
 460 {
 461     if (canSendMessage())
 462         send(Messages::NetworkProcess::ProcessDidResume(), 0);
 463 }
 464
 465 void NetworkProcessProxy::writeBlobToFilePath(const WebCore::URL& url, const String& path, CompletionHandler<void(bool)>&& callback)
 466 {
 467     if (!canSendMessage()) {
 468         callback(false);
 469         return;
 470     }
 471
 472     static uint64_t writeBlobToFilePathCallbackIdentifiers = 0;
 473     uint64_t callbackID = ++writeBlobToFilePathCallbackIdentifiers;
 474     m_writeBlobToFilePathCallbackMap.add(callbackID, WTFMove(callback));
 475
 476     SandboxExtension::Handle handleForWriting;
 477     SandboxExtension::createHandle(path, SandboxExtension::Type::ReadWrite, handleForWriting);
 478     send(Messages::NetworkProcess::WriteBlobToFilePath(url, path, handleForWriting, callbackID), 0);
 479 }
 480
 481 void NetworkProcessProxy::didWriteBlobToFilePath(bool success, uint64_t callbackID)
 482 {
 483     if (auto handler = m_writeBlobToFilePathCallbackMap.take(callbackID))
 484         handler(success);
 485     else
 486         ASSERT_NOT_REACHED();
 487 }
 488
 489 void NetworkProcessProxy::processReadyToSuspend()
 490 {
 491     m_throttler.processReadyToSuspend();
 492 }
 493
 494 void NetworkProcessProxy::didSetAssertionState(AssertionState)
 495 {
 496 }
 497
 498 void NetworkProcessProxy::setIsHoldingLockedFiles(bool isHoldingLockedFiles)
 499 {
 500     if (!isHoldingLockedFiles) {
 501         RELEASE_LOG(ProcessSuspension, "UIProcess is releasing a background assertion because the Network process is no longer holding locked files");
 502         m_tokenForHoldingLockedFiles = nullptr;
 503         return;
 504     }
 505     if (!m_tokenForHoldingLockedFiles) {
 506         RELEASE_LOG(ProcessSuspension, "UIProcess is taking a background assertion because the Network process is holding locked files");
 507         m_tokenForHoldingLockedFiles = m_throttler.backgroundActivityToken();
 508     }
 509 }
 510
 511 } // namespace WebKit