gecko/netwerk/protocol/http/nsHttpHandler.h
Sid Stamm 5026349b65 Bug 765398 - Add a "yes, I allow tracking" option to DNT. (r=dolske)
--HG--
extra : rebase_source : 1a0ce8dc9086dc501d9f5a183af8a5a3360ee8a9
2012-06-14 14:19:27 -07:00

447 lines
15 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 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 http://mozilla.org/MPL/2.0/. */
#ifndef nsHttpHandler_h__
#define nsHttpHandler_h__
#include "nsHttp.h"
#include "nsHttpAuthCache.h"
#include "nsHttpConnection.h"
#include "nsHttpConnectionMgr.h"
#include "ASpdySession.h"
#include "nsXPIDLString.h"
#include "nsString.h"
#include "nsCOMPtr.h"
#include "nsWeakReference.h"
#include "nsIHttpProtocolHandler.h"
#include "nsIProtocolProxyService.h"
#include "nsIIOService.h"
#include "nsIObserver.h"
#include "nsIObserverService.h"
#include "nsIStreamConverterService.h"
#include "nsICacheSession.h"
#include "nsICookieService.h"
#include "nsIIDNService.h"
#include "nsITimer.h"
#include "nsIStrictTransportSecurityService.h"
#include "nsISpeculativeConnect.h"
class nsHttpConnectionInfo;
class nsHttpHeaderArray;
class nsHttpTransaction;
class nsAHttpTransaction;
class nsIHttpChannel;
class nsIPrefBranch;
//-----------------------------------------------------------------------------
// nsHttpHandler - protocol handler for HTTP and HTTPS
//-----------------------------------------------------------------------------
class nsHttpHandler : public nsIHttpProtocolHandler
, public nsIObserver
, public nsSupportsWeakReference
, public nsISpeculativeConnect
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSIPROTOCOLHANDLER
NS_DECL_NSIPROXIEDPROTOCOLHANDLER
NS_DECL_NSIHTTPPROTOCOLHANDLER
NS_DECL_NSIOBSERVER
NS_DECL_NSISPECULATIVECONNECT
nsHttpHandler();
virtual ~nsHttpHandler();
nsresult Init();
nsresult AddStandardRequestHeaders(nsHttpHeaderArray *);
nsresult AddConnectionHeader(nsHttpHeaderArray *,
uint32_t capabilities);
bool IsAcceptableEncoding(const char *encoding);
const nsAFlatCString &UserAgent();
nsHttpVersion HttpVersion() { return mHttpVersion; }
nsHttpVersion ProxyHttpVersion() { return mProxyHttpVersion; }
uint8_t ReferrerLevel() { return mReferrerLevel; }
bool SendSecureXSiteReferrer() { return mSendSecureXSiteReferrer; }
uint8_t RedirectionLimit() { return mRedirectionLimit; }
PRIntervalTime IdleTimeout() { return mIdleTimeout; }
PRIntervalTime SpdyTimeout() { return mSpdyTimeout; }
uint16_t MaxRequestAttempts() { return mMaxRequestAttempts; }
const char *DefaultSocketType() { return mDefaultSocketType.get(); /* ok to return null */ }
nsIIDNService *IDNConverter() { return mIDNConverter; }
uint32_t PhishyUserPassLength() { return mPhishyUserPassLength; }
uint8_t GetQoSBits() { return mQoSBits; }
uint16_t GetIdleSynTimeout() { return mIdleSynTimeout; }
bool FastFallbackToIPv4() { return mFastFallbackToIPv4; }
bool ProxyPipelining() { return mProxyPipelining; }
uint32_t MaxSocketCount();
bool EnforceAssocReq() { return mEnforceAssocReq; }
bool IsPersistentHttpsCachingEnabled() { return mEnablePersistentHttpsCaching; }
bool IsTelemetryEnabled() { return mTelemetryEnabled; }
bool AllowExperiments() { return mTelemetryEnabled && mAllowExperiments; }
bool IsSpdyEnabled() { return mEnableSpdy; }
bool IsSpdyV2Enabled() { return mSpdyV2; }
bool IsSpdyV3Enabled() { return mSpdyV3; }
bool CoalesceSpdy() { return mCoalesceSpdy; }
bool UseAlternateProtocol() { return mUseAlternateProtocol; }
uint32_t SpdySendingChunkSize() { return mSpdySendingChunkSize; }
uint32_t SpdySendBufferSize() { return mSpdySendBufferSize; }
PRIntervalTime SpdyPingThreshold() { return mSpdyPingThreshold; }
PRIntervalTime SpdyPingTimeout() { return mSpdyPingTimeout; }
uint32_t ConnectTimeout() { return mConnectTimeout; }
uint32_t ParallelSpeculativeConnectLimit() { return mParallelSpeculativeConnectLimit; }
bool CritialRequestPrioritization() { return mCritialRequestPrioritization; }
bool PromptTempRedirect() { return mPromptTempRedirect; }
nsHttpAuthCache *AuthCache(bool aPrivate) {
return aPrivate ? &mPrivateAuthCache : &mAuthCache;
}
nsHttpConnectionMgr *ConnMgr() { return mConnMgr; }
// cache support
bool UseCache() const { return mUseCache; }
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.
nsresult InitiateTransaction(nsHttpTransaction *trans, int32_t priority)
{
return mConnMgr->AddTransaction(trans, priority);
}
// Called to change the priority of an existing transaction that has
// already been initiated.
nsresult RescheduleTransaction(nsHttpTransaction *trans, int32_t priority)
{
return mConnMgr->RescheduleTransaction(trans, priority);
}
// Called to cancel a transaction, which may or may not be assigned to
// a connection. Callable from any thread.
nsresult CancelTransaction(nsHttpTransaction *trans, nsresult reason)
{
return mConnMgr->CancelTransaction(trans, reason);
}
// Called when a connection is done processing a transaction. Callable
// from any thread.
nsresult ReclaimConnection(nsHttpConnection *conn)
{
return mConnMgr->ReclaimConnection(conn);
}
nsresult ProcessPendingQ(nsHttpConnectionInfo *cinfo)
{
return mConnMgr->ProcessPendingQ(cinfo);
}
nsresult ProcessPendingQ()
{
return mConnMgr->ProcessPendingQ();
}
nsresult GetSocketThreadTarget(nsIEventTarget **target)
{
return mConnMgr->GetSocketThreadTarget(target);
}
nsresult SpeculativeConnect(nsHttpConnectionInfo *ci,
nsIInterfaceRequestor *callbacks)
{
return mConnMgr->SpeculativeConnect(ci, callbacks);
}
//
// The HTTP handler caches pointers to specific XPCOM services, and
// provides the following helper routines for accessing those services:
//
nsresult GetStreamConverterService(nsIStreamConverterService **);
nsresult GetIOService(nsIIOService** service);
nsICookieService * GetCookieService(); // not addrefed
nsIStrictTransportSecurityService * GetSTSService();
// callable from socket thread only
uint32_t Get32BitsOfPseudoRandom();
// Called by the channel synchronously during asyncOpen
void OnOpeningRequest(nsIHttpChannel *chan)
{
NotifyObservers(chan, NS_HTTP_ON_OPENING_REQUEST_TOPIC);
}
// Called by the channel before writing a request
void OnModifyRequest(nsIHttpChannel *chan)
{
NotifyObservers(chan, NS_HTTP_ON_MODIFY_REQUEST_TOPIC);
}
// Called by the channel once headers are available
void OnExamineResponse(nsIHttpChannel *chan)
{
NotifyObservers(chan, NS_HTTP_ON_EXAMINE_RESPONSE_TOPIC);
}
// Called by the channel once headers have been merged with cached headers
void OnExamineMergedResponse(nsIHttpChannel *chan)
{
NotifyObservers(chan, NS_HTTP_ON_EXAMINE_MERGED_RESPONSE_TOPIC);
}
// Called by channels before a redirect happens. This notifies both the
// channel's and the global redirect observers.
nsresult AsyncOnChannelRedirect(nsIChannel* oldChan, nsIChannel* newChan,
uint32_t flags);
// Called by the channel when the response is read from the cache without
// communicating with the server.
void OnExamineCachedResponse(nsIHttpChannel *chan)
{
NotifyObservers(chan, NS_HTTP_ON_EXAMINE_CACHED_RESPONSE_TOPIC);
}
// Generates the host:port string for use in the Host: header as well as the
// CONNECT line for proxies. This handles IPv6 literals correctly.
static nsresult GenerateHostPort(const nsCString& host, int32_t port,
nsCString& hostLine);
bool GetPipelineAggressive() { return mPipelineAggressive; }
void GetMaxPipelineObjectSize(int64_t *outVal)
{
*outVal = mMaxPipelineObjectSize;
}
bool GetPipelineEnabled()
{
return mCapabilities & NS_HTTP_ALLOW_PIPELINING;
}
bool GetPipelineRescheduleOnTimeout()
{
return mPipelineRescheduleOnTimeout;
}
PRIntervalTime GetPipelineRescheduleTimeout()
{
return mPipelineRescheduleTimeout;
}
PRIntervalTime GetPipelineTimeout() { return mPipelineReadTimeout; }
mozilla::net::SpdyInformation *SpdyInfo() { return &mSpdyInfo; }
// returns true in between Init and Shutdown states
bool Active() { return mHandlerActive; }
static void GetCacheSessionNameForStoragePolicy(
nsCacheStoragePolicy storagePolicy,
bool isPrivate,
uint32_t appId,
bool inBrowser,
nsACString& sessionName);
private:
//
// Useragent/prefs helper methods
//
void BuildUserAgent();
void InitUserAgentComponents();
void PrefsChanged(nsIPrefBranch *prefs, const char *pref);
nsresult SetAccept(const char *);
nsresult SetAcceptLanguages(const char *);
nsresult SetAcceptEncodings(const char *);
nsresult InitConnectionMgr();
void NotifyObservers(nsIHttpChannel *chan, const char *event);
static void TimerCallback(nsITimer * aTimer, void * aClosure);
private:
// cached services
nsCOMPtr<nsIIOService> mIOService;
nsCOMPtr<nsIStreamConverterService> mStreamConvSvc;
nsCOMPtr<nsIObserverService> mObserverService;
nsCOMPtr<nsICookieService> mCookieService;
nsCOMPtr<nsIIDNService> mIDNConverter;
nsCOMPtr<nsIStrictTransportSecurityService> mSTSService;
// the authentication credentials cache
nsHttpAuthCache mAuthCache;
nsHttpAuthCache mPrivateAuthCache;
// the connection manager
nsHttpConnectionMgr *mConnMgr;
//
// prefs
//
uint8_t mHttpVersion;
uint8_t mProxyHttpVersion;
uint32_t mCapabilities;
uint8_t mReferrerLevel;
bool mFastFallbackToIPv4;
bool mProxyPipelining;
PRIntervalTime mIdleTimeout;
PRIntervalTime mSpdyTimeout;
uint16_t mMaxRequestAttempts;
uint16_t mMaxRequestDelay;
uint16_t mIdleSynTimeout;
bool mPipeliningEnabled;
uint16_t mMaxConnections;
uint8_t mMaxPersistentConnectionsPerServer;
uint8_t mMaxPersistentConnectionsPerProxy;
uint16_t mMaxPipelinedRequests;
uint16_t mMaxOptimisticPipelinedRequests;
bool mPipelineAggressive;
int64_t mMaxPipelineObjectSize;
bool mPipelineRescheduleOnTimeout;
PRIntervalTime mPipelineRescheduleTimeout;
PRIntervalTime mPipelineReadTimeout;
nsCOMPtr<nsITimer> mPipelineTestTimer;
uint8_t mRedirectionLimit;
// 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 mPipeliningOverSSL;
bool mEnforceAssocReq;
nsCString mAccept;
nsCString mAcceptLanguages;
nsCString mAcceptEncodings;
nsXPIDLCString mDefaultSocketType;
// cache support
uint32_t mLastUniqueID;
uint32_t mSessionStartTime;
// useragent components
nsCString mLegacyAppName;
nsCString mLegacyAppVersion;
nsCString mPlatform;
nsCString mOscpu;
nsCString mMisc;
nsCString mProduct;
nsXPIDLCString mProductSub;
nsXPIDLCString mAppName;
nsXPIDLCString mAppVersion;
nsCString mCompatFirefox;
bool mCompatFirefoxEnabled;
nsXPIDLCString mCompatDevice;
nsCString mUserAgent;
nsXPIDLCString mUserAgentOverride;
bool mUserAgentIsDirty; // true if mUserAgent should be rebuilt
bool mUseCache;
bool mPromptTempRedirect;
// mSendSecureXSiteReferrer: default is false,
// if true allow referrer headers between secure non-matching hosts
bool mSendSecureXSiteReferrer;
// Persistent HTTPS caching flag
bool mEnablePersistentHttpsCaching;
// For broadcasting tracking preference
bool mDoNotTrackEnabled;
PRUint8 mDoNotTrackValue;
// Whether telemetry is reported or not
bool mTelemetryEnabled;
// The value of network.allow-experiments
bool mAllowExperiments;
// true in between init and shutdown states
bool mHandlerActive;
// Try to use SPDY features instead of HTTP/1.1 over SSL
mozilla::net::SpdyInformation mSpdyInfo;
bool mEnableSpdy;
bool mSpdyV2;
bool mSpdyV3;
bool mCoalesceSpdy;
bool mUseAlternateProtocol;
uint32_t mSpdySendingChunkSize;
uint32_t mSpdySendBufferSize;
PRIntervalTime mSpdyPingThreshold;
PRIntervalTime mSpdyPingTimeout;
// The maximum amount of time to wait for socket transport to be
// established. In milliseconds.
uint32_t mConnectTimeout;
// The maximum number of current global half open sockets allowable
// when starting a new speculative connection.
uint32_t mParallelSpeculativeConnectLimit;
// Whether or not to block requests for non head js/css items (e.g. media)
// while those elements load.
bool mCritialRequestPrioritization;
};
//-----------------------------------------------------------------------------
extern 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
{
public:
// we basically just want to override GetScheme and GetDefaultPort...
// all other methods should be forwarded to the nsHttpHandler instance.
NS_DECL_ISUPPORTS
NS_DECL_NSIPROTOCOLHANDLER
NS_FORWARD_NSIPROXIEDPROTOCOLHANDLER (gHttpHandler->)
NS_FORWARD_NSIHTTPPROTOCOLHANDLER (gHttpHandler->)
NS_FORWARD_NSISPECULATIVECONNECT (gHttpHandler->)
nsHttpsHandler() { }
virtual ~nsHttpsHandler() { }
nsresult Init();
};
#endif // nsHttpHandler_h__