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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at */
#ifndef nsHttpHandler_h__
#define nsHttpHandler_h__
#include <functional>
#include "nsHttp.h"
#include "nsHttpAuthCache.h"
#include "nsHttpConnectionMgr.h"
#include "AlternateServices.h"
#include "ASpdySession.h"
#include "HttpTrafficAnalyzer.h"
#include "mozilla/Mutex.h"
#include "mozilla/StaticPtr.h"
#include "mozilla/TimeStamp.h"
#include "nsString.h"
#include "nsCOMPtr.h"
#include "nsWeakReference.h"
#include "nsIHttpProtocolHandler.h"
#include "nsIObserver.h"
#include "nsISpeculativeConnect.h"
#include "nsDataHashtable.h"
#ifdef DEBUG
# include "nsIOService.h"
class nsIHttpChannel;
class nsIHttpUpgradeListener;
class nsIPrefBranch;
class nsICancelable;
class nsICookieService;
class nsIIOService;
class nsIRequestContextService;
class nsISiteSecurityService;
class nsIStreamConverterService;
namespace mozilla {
namespace net {
bool OnSocketThread();
class ATokenBucketEvent;
class EventTokenBucket;
class Tickler;
class nsHttpConnection;
class nsHttpConnectionInfo;
class HttpHandlerInitArgs;
class HttpTransactionShell;
class AltSvcMapping;
class TRR;
class TRRServiceChannel;
class SocketProcessChild;
* FRAMECHECK_LAX - no check
* 1) that chunk-encoding does not have the last 0-size
* chunk. So, if a chunked-encoded transfer ends on exactly
* a chunk boundary we consider that fine. This will allows
* us to accept buggy servers that do not send the last
* chunk. It will make us not detect a certain amount of
* cut-offs.
* 2) When receiving a gzipped response, we consider a
* gzip stream that doesn't end fine according to the gzip
* decompressing state machine to be a partial transfer.
* If a gzipped transfer ends fine according to the
* decompressor, we do not check for size unalignments.
* This allows to allow HTTP gzipped responses where the
* Content-Length is not the same as the actual contents.
* 3) When receiving HTTP that isn't
* content-encoded/compressed (like in case 2) and not
* chunked (like in case 1), perform the size comparison
* between Content-Length: and the actual size received
* and consider a mismatch to mean a
* enforce that the last 0-size chunk is received
* in case 1).
* FRAMECHECK_STRICT - we also do not allow case 2) and 3) from
enum FrameCheckLevel {
// nsHttpHandler - protocol handler for HTTP and HTTPS
class nsHttpHandler final : public nsIHttpProtocolHandler,
public nsIObserver,
public nsSupportsWeakReference,
public nsISpeculativeConnect {
static already_AddRefed<nsHttpHandler> GetInstance();
[[nodiscard]] nsresult AddStandardRequestHeaders(
nsHttpRequestHead*, bool isSecure,
nsContentPolicyType aContentPolicyType);
[[nodiscard]] nsresult AddConnectionHeader(nsHttpRequestHead*,
uint32_t capabilities);
bool IsAcceptableEncoding(const char* encoding, bool isSecure);
const nsCString& UserAgent();
enum HttpVersion HttpVersion() { return mHttpVersion; }
enum HttpVersion ProxyHttpVersion() { return mProxyHttpVersion; }
uint8_t RedirectionLimit() { return mRedirectionLimit; }
PRIntervalTime IdleTimeout() { return mIdleTimeout; }
PRIntervalTime SpdyTimeout() { return mSpdyTimeout; }
PRIntervalTime ResponseTimeout() {
return mResponseTimeoutEnabled ? mResponseTimeout : 0;
PRIntervalTime ResponseTimeoutEnabled() { return mResponseTimeoutEnabled; }
uint32_t NetworkChangedTimeout() { return mNetworkChangedTimeout; }
uint16_t MaxRequestAttempts() { return mMaxRequestAttempts; }
const nsCString& DefaultSocketType() { return mDefaultSocketType; }
uint32_t PhishyUserPassLength() { return mPhishyUserPassLength; }
uint8_t GetQoSBits() { return mQoSBits; }
uint16_t GetIdleSynTimeout() { return mIdleSynTimeout; }
uint16_t GetFallbackSynTimeout() { return mFallbackSynTimeout; }
bool FastFallbackToIPv4() { return mFastFallbackToIPv4; }
uint32_t MaxSocketCount();
bool EnforceAssocReq() { return mEnforceAssocReq; }
bool IsPersistentHttpsCachingEnabled() {
return mEnablePersistentHttpsCaching;
bool IsSpdyEnabled() { return mEnableSpdy; }
bool IsHttp2Enabled() { return mHttp2Enabled; }
bool EnforceHttp2TlsProfile() { return mEnforceHttp2TlsProfile; }
bool CoalesceSpdy() { return mCoalesceSpdy; }
bool UseSpdyPersistentSettings() { return mSpdyPersistentSettings; }
uint32_t SpdySendingChunkSize() { return mSpdySendingChunkSize; }
uint32_t SpdySendBufferSize() { return mSpdySendBufferSize; }
uint32_t SpdyPushAllowance() { return mSpdyPushAllowance; }
uint32_t SpdyPullAllowance() { return mSpdyPullAllowance; }
uint32_t DefaultSpdyConcurrent() { return mDefaultSpdyConcurrent; }
PRIntervalTime SpdyPingThreshold() { return mSpdyPingThreshold; }
PRIntervalTime SpdyPingTimeout() { return mSpdyPingTimeout; }
bool AllowPush() { return mAllowPush; }
bool AllowAltSvc() { return mEnableAltSvc; }
bool AllowAltSvcOE() { return mEnableAltSvcOE; }
bool AllowOriginExtension() { return mEnableOriginExtension; }
uint32_t ConnectTimeout() { return mConnectTimeout; }
uint32_t TLSHandshakeTimeout() { return mTLSHandshakeTimeout; }
uint32_t ParallelSpeculativeConnectLimit() {
return mParallelSpeculativeConnectLimit;
bool CriticalRequestPrioritization() {
return mCriticalRequestPrioritization;
bool IsDocumentNosniffEnabled() { return mRespectDocumentNoSniff; }
bool UseH2Deps() { return mUseH2Deps; }
bool IsH2WebsocketsEnabled() { return mEnableH2Websockets; }
uint32_t MaxConnectionsPerOrigin() {
return mMaxPersistentConnectionsPerServer;
bool UseRequestTokenBucket() { return mRequestTokenBucketEnabled; }
uint16_t RequestTokenBucketMinParallelism() {
return mRequestTokenBucketMinParallelism;
uint32_t RequestTokenBucketHz() { return mRequestTokenBucketHz; }
uint32_t RequestTokenBucketBurst() { return mRequestTokenBucketBurst; }
bool PromptTempRedirect() { return mPromptTempRedirect; }
bool IsUrgentStartEnabled() { return mUrgentStartEnabled; }
bool IsTailBlockingEnabled() { return mTailBlockingEnabled; }
uint32_t TailBlockingDelayQuantum(bool aAfterDOMContentLoaded) {
return aAfterDOMContentLoaded ? mTailDelayQuantumAfterDCL
: mTailDelayQuantum;
uint32_t TailBlockingDelayMax() { return mTailDelayMax; }
uint32_t TailBlockingTotalMax() { return mTailTotalMax; }
uint32_t ThrottlingReadLimit() {
return mThrottleVersion == 1 ? 0 : mThrottleReadLimit;
int32_t SendWindowSize() { return mSendWindowSize * 1024; }
// TCP Keepalive configuration values.
// Returns true if TCP keepalive should be enabled for short-lived conns.
bool TCPKeepaliveEnabledForShortLivedConns() {
return mTCPKeepaliveShortLivedEnabled;
// Return time (secs) that a connection is consider short lived (for TCP
// keepalive purposes). After this time, the connection is long-lived.
int32_t GetTCPKeepaliveShortLivedTime() {
return mTCPKeepaliveShortLivedTimeS;
// Returns time (secs) before first TCP keepalive probes should be sent;
// same time used between successful keepalive probes.
int32_t GetTCPKeepaliveShortLivedIdleTime() {
return mTCPKeepaliveShortLivedIdleTimeS;
// Returns true if TCP keepalive should be enabled for long-lived conns.
bool TCPKeepaliveEnabledForLongLivedConns() {
return mTCPKeepaliveLongLivedEnabled;
// Returns time (secs) before first TCP keepalive probes should be sent;
// same time used between successful keepalive probes.
int32_t GetTCPKeepaliveLongLivedIdleTime() {
return mTCPKeepaliveLongLivedIdleTimeS;
bool UseFastOpen() {
return mUseFastOpen && mFastOpenSupported &&
(mFastOpenStallsCounter < mFastOpenStallsLimit) &&
(mFastOpenConsecutiveFailureCounter <
// If one of tcp connections return PR_NOT_TCP_SOCKET_ERROR while trying
// fast open, it means that Fast Open is turned off so we will not try again
// until a restart. This is only on Linux.
void SetFastOpenNotSupported() { mFastOpenSupported = false; }
void IncrementFastOpenConsecutiveFailureCounter();
void ResetFastOpenConsecutiveFailureCounter() {
mFastOpenConsecutiveFailureCounter = 0;
void IncrementFastOpenStallsCounter();
uint32_t CheckIfConnectionIsStalledOnlyIfIdleForThisAmountOfSeconds() {
return mFastOpenStallsIdleTime;
uint32_t FastOpenStallsTimeout() { return mFastOpenStallsTimeout; }
// returns the HTTP framing check level preference, as controlled with
// network.http.enforce-framing.http1 and network.http.enforce-framing.soft
FrameCheckLevel GetEnforceH1Framing() { return mEnforceH1Framing; }
nsHttpAuthCache* AuthCache(bool aPrivate) {
return aPrivate ? &mPrivateAuthCache : &mAuthCache;
nsHttpConnectionMgr* ConnMgr() {
MOZ_ASSERT_IF(nsIOService::UseSocketProcess(), XRE_IsSocketProcess());
return mConnMgr->AsHttpConnectionMgr();
AltSvcCache* AltServiceCache() const {
return mAltSvcCache.get();
void ClearHostMapping(nsHttpConnectionInfo* aConnInfo);
// cache support
uint32_t GenerateUniqueID() { return ++mLastUniqueID; }
uint32_t SessionStartTime() { return mSessionStartTime; }
// Connection management methods:
// - the handler only owns idle connections; it does not own active
// connections.
// - the handler keeps a count of active connections to enforce the
// steady-state max-connections pref.
// Called to kick-off a new transaction, by default the transaction
// will be put on the pending transaction queue if it cannot be
// initiated at this time. Callable from any thread.
[[nodiscard]] nsresult InitiateTransaction(HttpTransactionShell* trans,
int32_t priority);
// This function is also called to kick-off a new transaction. But the new
// transaction will take a sticky connection from |transWithStickyConn|
// and reuse it.
[[nodiscard]] nsresult InitiateTransactionWithStickyConn(
HttpTransactionShell* trans, int32_t priority,
HttpTransactionShell* transWithStickyConn);
// Called to change the priority of an existing transaction that has
// already been initiated.
[[nodiscard]] nsresult RescheduleTransaction(HttpTransactionShell* trans,
int32_t priority);
void UpdateClassOfServiceOnTransaction(HttpTransactionShell* trans,
uint32_t classOfService);
// Called to cancel a transaction, which may or may not be assigned to
// a connection. Callable from any thread.
[[nodiscard]] nsresult CancelTransaction(HttpTransactionShell* trans,
nsresult reason);
// Called when a connection is done processing a transaction. Callable
// from any thread.
[[nodiscard]] nsresult ReclaimConnection(HttpConnectionBase* conn) {
return mConnMgr->ReclaimConnection(conn);
[[nodiscard]] nsresult ProcessPendingQ(nsHttpConnectionInfo* cinfo) {
return mConnMgr->ProcessPendingQ(cinfo);
[[nodiscard]] nsresult ProcessPendingQ() {
return mConnMgr->ProcessPendingQ();
[[nodiscard]] nsresult GetSocketThreadTarget(nsIEventTarget** target) {
return mConnMgr->GetSocketThreadTarget(target);
[[nodiscard]] nsresult SpeculativeConnect(nsHttpConnectionInfo* ci,
nsIInterfaceRequestor* callbacks,
uint32_t caps = 0) {
RefPtr<nsHttpConnectionInfo> clone = ci->Clone();
return mConnMgr->SpeculativeConnect(clone, callbacks, caps);
[[nodiscard]] nsresult SpeculativeConnect(nsHttpConnectionInfo* ci,
nsIInterfaceRequestor* callbacks,
uint32_t caps,
NullHttpTransaction* aTrans) {
RefPtr<nsHttpConnectionInfo> clone = ci->Clone();
return mConnMgr->SpeculativeConnect(clone, callbacks, caps, aTrans);
// Alternate Services Maps are main thread only
void UpdateAltServiceMapping(AltSvcMapping* map, nsProxyInfo* proxyInfo,
nsIInterfaceRequestor* callbacks, uint32_t caps,
const OriginAttributes& originAttributes) {
mAltSvcCache->UpdateAltServiceMapping(map, proxyInfo, callbacks, caps,
already_AddRefed<AltSvcMapping> GetAltServiceMapping(
const nsACString& scheme, const nsACString& host, int32_t port, bool pb,
bool isolated, const nsACString& topWindowOrigin,
const OriginAttributes& originAttributes, bool aHttp3Allowed) {
return mAltSvcCache->GetAltServiceMapping(scheme, host, port, pb, isolated,
topWindowOrigin, originAttributes,
// The HTTP handler caches pointers to specific XPCOM services, and
// provides the following helper routines for accessing those services:
[[nodiscard]] nsresult GetStreamConverterService(nsIStreamConverterService**);
[[nodiscard]] nsresult GetIOService(nsIIOService** service);
nsICookieService* GetCookieService(); // not addrefed
nsISiteSecurityService* GetSSService();
// Called by the channel synchronously during asyncOpen
void OnFailedOpeningRequest(nsIHttpChannel* chan) {
// Called by the channel synchronously during asyncOpen
void OnOpeningRequest(nsIHttpChannel* chan) {
void OnOpeningDocumentRequest(nsIIdentChannel* chan) {
// Called by the channel before writing a request
void OnModifyRequest(nsIHttpChannel* chan) {
void OnModifyDocumentRequest(nsIIdentChannel* chan) {
// Called by the channel before writing a request
void OnStopRequest(nsIHttpChannel* chan) {
NotifyObservers(chan, NS_HTTP_ON_STOP_REQUEST_TOPIC);
// Called by the channel before setting up the transaction
void OnBeforeConnect(nsIHttpChannel* chan) {
// Called by the channel once headers are available
void OnExamineResponse(nsIHttpChannel* chan) {
// Called by the channel once headers have been merged with cached headers
void OnExamineMergedResponse(nsIHttpChannel* chan) {
// Called by the channel once it made background cache revalidation
void OnBackgroundRevalidation(nsIHttpChannel* chan) {
// Called by channels before a redirect happens. This notifies both the
// channel's and the global redirect observers.
[[nodiscard]] nsresult AsyncOnChannelRedirect(
nsIChannel* oldChan, nsIChannel* newChan, uint32_t flags,
nsIEventTarget* mainThreadEventTarget = nullptr);
// Called by the channel when the response is read from the cache without
// communicating with the server.
void OnExamineCachedResponse(nsIHttpChannel* chan) {
// Generates the host:port string for use in the Host: header as well as the
// CONNECT line for proxies. This handles IPv6 literals correctly.
[[nodiscard]] static nsresult GenerateHostPort(const nsCString& host,
int32_t port,
nsACString& hostLine);
SpdyInformation* SpdyInfo() { return &mSpdyInfo; }
bool IsH2MandatorySuiteEnabled() { return mH2MandatorySuiteEnabled; }
// returns true in between Init and Shutdown states
bool Active() { return mHandlerActive; }
nsIRequestContextService* GetRequestContextService() {
return mRequestContextService.get();
void ShutdownConnectionManager();
uint32_t DefaultHpackBuffer() const { return mDefaultHpackBuffer; }
bool Bug1563538() const { return mBug1563538; }
bool Bug1563695() const { return mBug1563695; }
bool Bug1556491() const { return mBug1556491; }
bool IsHttp3VersionSupported(const nsACString& version);
bool IsHttp3Enabled() const { return mHttp3Enabled; }
uint32_t DefaultQpackTableSize() const { return mQpackTableSize; }
uint16_t DefaultHttp3MaxBlockedStreams() const {
return (uint16_t)mHttp3MaxBlockedStreams;
uint32_t MaxHttpResponseHeaderSize() const {
return mMaxHttpResponseHeaderSize;
float FocusedWindowTransactionRatio() const {
return mFocusedWindowTransactionRatio;
bool ActiveTabPriority() const { return mActiveTabPriority; }
// Called when an optimization feature affecting active vs background tab load
// took place. Called only on the parent process and only updates
// mLastActiveTabLoadOptimizationHit timestamp to now.
void NotifyActiveTabLoadOptimization();
TimeStamp const GetLastActiveTabLoadOptimizationHit();
void SetLastActiveTabLoadOptimizationHit(TimeStamp const& when);
bool IsBeforeLastActiveTabLoadOptimization(TimeStamp const& when);
bool DumpHpackTables() { return mDumpHpackTables; }
HttpTrafficAnalyzer* GetHttpTrafficAnalyzer();
bool GetThroughCaptivePortal() { return mThroughCaptivePortal; }
nsresult CompleteUpgrade(HttpTransactionShell* aTrans,
nsIHttpUpgradeListener* aUpgradeListener);
nsresult DoShiftReloadConnectionCleanupWithConnInfo(
nsHttpConnectionInfo* aCI);
virtual ~nsHttpHandler();
[[nodiscard]] nsresult Init();
// Useragent/prefs helper methods
void BuildUserAgent();
void InitUserAgentComponents();
static void PrefsChanged(const char* pref, void* self);
void PrefsChanged(const char* pref);
[[nodiscard]] nsresult SetAcceptLanguages();
[[nodiscard]] nsresult SetAcceptEncodings(const char*, bool mIsSecure);
[[nodiscard]] nsresult InitConnectionMgr();
void NotifyObservers(nsIChannel* chan, const char* event);
void SetFastOpenOSSupport();
friend class SocketProcessChild;
void SetHttpHandlerInitArgs(const HttpHandlerInitArgs& aArgs);
void SetDeviceModelId(const nsCString& aModelId);
// Checks if there are any user certs or active smart cards on a different
// thread. Updates mSpeculativeConnectEnabled when done.
void MaybeEnableSpeculativeConnect();
// We only allow TRR and TRRServiceChannel itself to create TRRServiceChannel.
friend class TRRServiceChannel;
friend class TRR;
nsresult CreateTRRServiceChannel(nsIURI* uri, nsIProxyInfo* givenProxyInfo,
uint32_t proxyResolveFlags, nsIURI* proxyURI,
nsILoadInfo* aLoadInfo, nsIChannel** result);
nsresult SetupChannelInternal(HttpBaseChannel* aChannel, nsIURI* uri,
nsIProxyInfo* givenProxyInfo,
uint32_t proxyResolveFlags, nsIURI* proxyURI,
nsILoadInfo* aLoadInfo, nsIChannel** result);
// cached services
nsMainThreadPtrHandle<nsIIOService> mIOService;
nsMainThreadPtrHandle<nsIStreamConverterService> mStreamConvSvc;
nsMainThreadPtrHandle<nsICookieService> mCookieService;
nsMainThreadPtrHandle<nsISiteSecurityService> mSSService;
// the authentication credentials cache
nsHttpAuthCache mAuthCache;
nsHttpAuthCache mPrivateAuthCache;
// the connection manager
RefPtr<HttpConnectionMgrShell> mConnMgr;
UniquePtr<AltSvcCache> mAltSvcCache;
// prefs
enum HttpVersion mHttpVersion;
enum HttpVersion mProxyHttpVersion;
uint32_t mCapabilities;
bool mFastFallbackToIPv4;
PRIntervalTime mIdleTimeout;
PRIntervalTime mSpdyTimeout;
PRIntervalTime mResponseTimeout;
bool mResponseTimeoutEnabled;
uint32_t mNetworkChangedTimeout; // milliseconds
uint16_t mMaxRequestAttempts;
uint16_t mMaxRequestDelay;
uint16_t mIdleSynTimeout;
uint16_t mFallbackSynTimeout; // seconds
bool mH2MandatorySuiteEnabled;
uint16_t mMaxUrgentExcessiveConns;
uint16_t mMaxConnections;
uint8_t mMaxPersistentConnectionsPerServer;
uint8_t mMaxPersistentConnectionsPerProxy;
bool mThrottleEnabled;
uint32_t mThrottleVersion;
uint32_t mThrottleSuspendFor;
uint32_t mThrottleResumeFor;
uint32_t mThrottleReadLimit;
uint32_t mThrottleReadInterval;
uint32_t mThrottleHoldTime;
uint32_t mThrottleMaxTime;
int32_t mSendWindowSize;
bool mUrgentStartEnabled;
bool mTailBlockingEnabled;
uint32_t mTailDelayQuantum;
uint32_t mTailDelayQuantumAfterDCL;
uint32_t mTailDelayMax;
uint32_t mTailTotalMax;
uint8_t mRedirectionLimit;
bool mBeConservativeForProxy;
// we'll warn the user if we load an URL containing a userpass field
// unless its length is less than this threshold. this warning is
// intended to protect the user against spoofing attempts that use
// the userpass field of the URL to obscure the actual origin server.
uint8_t mPhishyUserPassLength;
uint8_t mQoSBits;
bool mEnforceAssocReq;
nsCString mImageAcceptHeader;
nsCString mAcceptLanguages;
nsCString mHttpAcceptEncodings;
nsCString mHttpsAcceptEncodings;
nsCString mDefaultSocketType;
// cache support
uint32_t mLastUniqueID;
uint32_t mSessionStartTime;
// useragent components
nsCString mLegacyAppName;
nsCString mLegacyAppVersion;
nsCString mPlatform;
nsCString mOscpu;
nsCString mMisc;
nsCString mProduct;
nsCString mProductSub;
nsCString mAppName;
nsCString mAppVersion;
nsCString mCompatFirefox;
bool mCompatFirefoxEnabled;
nsCString mCompatDevice;
nsCString mDeviceModelId;
nsCString mUserAgent;
nsCString mSpoofedUserAgent;
nsCString mUserAgentOverride;
bool mUserAgentIsDirty; // true if mUserAgent should be rebuilt
bool mAcceptLanguagesIsDirty;
bool mPromptTempRedirect;
// Persistent HTTPS caching flag
bool mEnablePersistentHttpsCaching;
// for broadcasting safe hint;
bool mSafeHintEnabled;
bool mParentalControlEnabled;
// true in between init and shutdown states
Atomic<bool, Relaxed> mHandlerActive;
// The value of 'hidden' network.http.debug-observations : 1;
uint32_t mDebugObservations : 1;
uint32_t mEnableSpdy : 1;
uint32_t mHttp2Enabled : 1;
uint32_t mUseH2Deps : 1;
uint32_t mEnforceHttp2TlsProfile : 1;
uint32_t mCoalesceSpdy : 1;
uint32_t mSpdyPersistentSettings : 1;
uint32_t mAllowPush : 1;
uint32_t mEnableAltSvc : 1;
uint32_t mEnableAltSvcOE : 1;
uint32_t mEnableOriginExtension : 1;
uint32_t mEnableH2Websockets : 1;
uint32_t mDumpHpackTables : 1;
// Try to use SPDY features instead of HTTP/1.1 over SSL
SpdyInformation mSpdyInfo;
uint32_t mSpdySendingChunkSize;
uint32_t mSpdySendBufferSize;
uint32_t mSpdyPushAllowance;
uint32_t mSpdyPullAllowance;
uint32_t mDefaultSpdyConcurrent;
PRIntervalTime mSpdyPingThreshold;
PRIntervalTime mSpdyPingTimeout;
// The maximum amount of time to wait for socket transport to be
// established. In milliseconds.
uint32_t mConnectTimeout;
// The maximum amount of time to wait for a tls handshake to be
// established. In milliseconds.
uint32_t mTLSHandshakeTimeout;
// The maximum number of current global half open sockets allowable
// when starting a new speculative connection.
uint32_t mParallelSpeculativeConnectLimit;
// For Rate Pacing of HTTP/1 requests through a netwerk/base/EventTokenBucket
// Active requests <= *MinParallelism are not subject to the rate pacing
bool mRequestTokenBucketEnabled;
uint16_t mRequestTokenBucketMinParallelism;
uint32_t mRequestTokenBucketHz; // EventTokenBucket HZ
uint32_t mRequestTokenBucketBurst; // EventTokenBucket Burst
// Whether or not to block requests for non head js/css items (e.g. media)
// while those elements load.
bool mCriticalRequestPrioritization;
// Whether to respect X-Content-Type nosniff on Page loads
bool mRespectDocumentNoSniff;
// TCP Keepalive configuration values.
// True if TCP keepalive is enabled for short-lived conns.
bool mTCPKeepaliveShortLivedEnabled;
// Time (secs) indicating how long a conn is considered short-lived.
int32_t mTCPKeepaliveShortLivedTimeS;
// Time (secs) before first keepalive probe; between successful probes.
int32_t mTCPKeepaliveShortLivedIdleTimeS;
// True if TCP keepalive is enabled for long-lived conns.
bool mTCPKeepaliveLongLivedEnabled;
// Time (secs) before first keepalive probe; between successful probes.
int32_t mTCPKeepaliveLongLivedIdleTimeS;
// if true, generate NS_ERROR_PARTIAL_TRANSFER for h1 responses with
// incorrect content lengths or malformed chunked encodings
FrameCheckLevel mEnforceH1Framing;
nsCOMPtr<nsIRequestContextService> mRequestContextService;
// The default size (in bytes) of the HPACK decompressor table.
uint32_t mDefaultHpackBuffer;
// Pref for the whole fix that bug provides
Atomic<bool, Relaxed> mBug1563538;
Atomic<bool, Relaxed> mBug1563695;
Atomic<bool, Relaxed> mBug1556491;
Atomic<bool, Relaxed> mHttp3Enabled;
// Http3 parameters
Atomic<uint32_t, Relaxed> mQpackTableSize;
Atomic<uint32_t, Relaxed>
mHttp3MaxBlockedStreams; // uint16_t is enough here, but Atomic only
// supports uint32_t or uint64_t.
// The max size (in bytes) for received Http response header.
uint32_t mMaxHttpResponseHeaderSize;
// The ratio for dispatching transactions from the focused window.
float mFocusedWindowTransactionRatio;
// We may disable speculative connect if the browser has user certificates
// installed as that might randomly popup the certificate choosing window.
Atomic<bool, Relaxed> mSpeculativeConnectEnabled;
Atomic<bool, Relaxed> mUseFastOpen;
Atomic<bool, Relaxed> mFastOpenSupported;
uint32_t mFastOpenConsecutiveFailureLimit;
uint32_t mFastOpenConsecutiveFailureCounter;
uint32_t mFastOpenStallsLimit;
uint32_t mFastOpenStallsCounter;
uint32_t mFastOpenStallsIdleTime;
uint32_t mFastOpenStallsTimeout;
// If true, the transactions from active tab will be dispatched first.
bool mActiveTabPriority;
HttpTrafficAnalyzer mHttpTrafficAnalyzer;
// For Rate Pacing Certain Network Events. Only assign this pointer on
// socket thread.
void MakeNewRequestTokenBucket();
RefPtr<EventTokenBucket> mRequestTokenBucket;
// Socket thread only
[[nodiscard]] nsresult SubmitPacedRequest(ATokenBucketEvent* event,
nsICancelable** cancel) {
MOZ_ASSERT(OnSocketThread(), "not on socket thread");
if (!mRequestTokenBucket) {
return mRequestTokenBucket->SubmitEvent(event, cancel);
// Socket thread only
void SetRequestTokenBucket(EventTokenBucket* aTokenBucket) {
MOZ_ASSERT(OnSocketThread(), "not on socket thread");
mRequestTokenBucket = aTokenBucket;
void StopRequestTokenBucket() {
MOZ_ASSERT(OnSocketThread(), "not on socket thread");
if (mRequestTokenBucket) {
mRequestTokenBucket = nullptr;
RefPtr<Tickler> mWifiTickler;
void TickleWifi(nsIInterfaceRequestor* cb);
[[nodiscard]] nsresult SpeculativeConnectInternal(
nsIURI* aURI, nsIPrincipal* aPrincipal, nsIInterfaceRequestor* aCallbacks,
bool anonymous);
// State for generating channelIds
uint32_t mProcessId;
Atomic<uint32_t, Relaxed> mNextChannelId;
// The last time any of the active tab page load optimization took place.
// This is accessed on multiple threads, hence a lock is needed.
// On the parent process this is updated to now every time a scheduling
// or rate optimization related to the active/background tab is hit.
// We carry this value through each http channel's onstoprequest notification
// to the parent process. On the content process then we just update this
// value from ipc onstoprequest arguments. This is a sufficent way of passing
// it down to the content process, since the value will be used only after
// onstoprequest notification coming from an http channel.
Mutex mLastActiveTabLoadOptimizationLock;
TimeStamp mLastActiveTabLoadOptimizationHit;
Mutex mSpdyBlacklistLock;
[[nodiscard]] nsresult NewChannelId(uint64_t& channelId);
void AddHttpChannel(uint64_t aId, nsISupports* aChannel);
void RemoveHttpChannel(uint64_t aId);
nsWeakPtr GetWeakHttpChannel(uint64_t aId);
void BlacklistSpdy(const nsHttpConnectionInfo* ci);
[[nodiscard]] bool IsSpdyBlacklisted(const nsHttpConnectionInfo* ci);
nsTHashtable<nsCStringHashKey> mBlacklistedSpdyOrigins;
bool mThroughCaptivePortal;
// The mapping of channel id and the weak pointer of nsHttpChannel.
nsDataHashtable<nsUint64HashKey, nsWeakPtr> mIDToHttpChannelMap;
extern StaticRefPtr<nsHttpHandler> gHttpHandler;
// nsHttpsHandler - thin wrapper to distinguish the HTTP handler from the
// HTTPS handler (even though they share the same impl).
class nsHttpsHandler : public nsIHttpProtocolHandler,
public nsSupportsWeakReference,
public nsISpeculativeConnect {
virtual ~nsHttpsHandler() = default;
// we basically just want to override GetScheme and GetDefaultPort...
// all other methods should be forwarded to the nsHttpHandler instance.
nsHttpsHandler() = default;
[[nodiscard]] nsresult Init();
// HSTSDataCallbackWrapper - A threadsafe helper class to wrap the callback.
// We need this because dom::promise and EnsureHSTSDataResolver are not
// threadsafe.
class HSTSDataCallbackWrapper final {
explicit HSTSDataCallbackWrapper(std::function<void(bool)>&& aCallback)
: mCallback(std::move(aCallback)) {
void DoCallback(bool aResult) {
~HSTSDataCallbackWrapper() = default;
std::function<void(bool)> mCallback;
} // namespace net
} // namespace mozilla
#endif // nsHttpHandler_h__