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gecko/netwerk/protocol/http/nsHttpChannel.h

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* vim:set et cin ts=4 sw=4 sts=4: */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is Mozilla.
*
* The Initial Developer of the Original Code is
* Netscape Communications.
* Portions created by the Initial Developer are Copyright (C) 2001
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Darin Fisher <darin@netscape.com> (original author)
* Christian Biesinger <cbiesinger@web.de>
* Daniel Witte <dwitte@mozilla.com>
* Jason Duell <jduell.mcbugs@gmail.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#ifndef nsHttpChannel_h__
#define nsHttpChannel_h__
#include "HttpBaseChannel.h"
#include "nsHttpTransaction.h"
#include "nsInputStreamPump.h"
#include "nsThreadUtils.h"
#include "nsTArray.h"
#include "nsIHttpEventSink.h"
#include "nsICachingChannel.h"
#include "nsICacheEntryDescriptor.h"
#include "nsICacheListener.h"
#include "nsIApplicationCacheChannel.h"
#include "nsIPrompt.h"
#include "nsIResumableChannel.h"
#include "nsIProtocolProxyCallback.h"
#include "nsICancelable.h"
#include "nsIHttpAuthenticableChannel.h"
#include "nsIHttpChannelAuthProvider.h"
#include "nsIAsyncVerifyRedirectCallback.h"
#include "nsICryptoHash.h"
#include "nsITimedChannel.h"
#include "nsDNSPrefetch.h"
#include "TimingStruct.h"
class nsAHttpConnection;
class AutoRedirectVetoNotifier;
using namespace mozilla::net;
//-----------------------------------------------------------------------------
// nsHttpChannel
//-----------------------------------------------------------------------------
class nsHttpChannel : public HttpBaseChannel
, public HttpAsyncAborter<nsHttpChannel>
, public nsIStreamListener
, public nsICachingChannel
, public nsICacheListener
, public nsITransportEventSink
, public nsIProtocolProxyCallback
, public nsIHttpAuthenticableChannel
, public nsIApplicationCacheChannel
, public nsIAsyncVerifyRedirectCallback
, public nsITimedChannel
{
public:
NS_DECL_ISUPPORTS_INHERITED
NS_DECL_NSIREQUESTOBSERVER
NS_DECL_NSISTREAMLISTENER
NS_DECL_NSICACHEINFOCHANNEL
NS_DECL_NSICACHINGCHANNEL
NS_DECL_NSICACHELISTENER
NS_DECL_NSITRANSPORTEVENTSINK
NS_DECL_NSIPROTOCOLPROXYCALLBACK
NS_DECL_NSIPROXIEDCHANNEL
NS_DECL_NSIAPPLICATIONCACHECONTAINER
NS_DECL_NSIAPPLICATIONCACHECHANNEL
NS_DECL_NSIASYNCVERIFYREDIRECTCALLBACK
NS_DECL_NSITIMEDCHANNEL
// nsIHttpAuthenticableChannel. We can't use
// NS_DECL_NSIHTTPAUTHENTICABLECHANNEL because it duplicates cancel() and
// others.
NS_IMETHOD GetIsSSL(bool *aIsSSL);
NS_IMETHOD GetProxyMethodIsConnect(bool *aProxyMethodIsConnect);
NS_IMETHOD GetServerResponseHeader(nsACString & aServerResponseHeader);
NS_IMETHOD GetProxyChallenges(nsACString & aChallenges);
NS_IMETHOD GetWWWChallenges(nsACString & aChallenges);
NS_IMETHOD SetProxyCredentials(const nsACString & aCredentials);
NS_IMETHOD SetWWWCredentials(const nsACString & aCredentials);
NS_IMETHOD OnAuthAvailable();
NS_IMETHOD OnAuthCancelled(bool userCancel);
// Functions we implement from nsIHttpAuthenticableChannel but are
// declared in HttpBaseChannel must be implemented in this class. We
// just call the HttpBaseChannel:: impls.
NS_IMETHOD GetLoadFlags(nsLoadFlags *aLoadFlags);
NS_IMETHOD GetURI(nsIURI **aURI);
NS_IMETHOD GetNotificationCallbacks(nsIInterfaceRequestor **aCallbacks);
NS_IMETHOD GetLoadGroup(nsILoadGroup **aLoadGroup);
NS_IMETHOD GetRequestMethod(nsACString& aMethod);
nsHttpChannel();
virtual ~nsHttpChannel();
virtual nsresult Init(nsIURI *aURI, PRUint8 aCaps, nsProxyInfo *aProxyInfo);
// Methods HttpBaseChannel didn't implement for us or that we override.
//
// nsIRequest
NS_IMETHOD Cancel(nsresult status);
NS_IMETHOD Suspend();
NS_IMETHOD Resume();
// nsIChannel
NS_IMETHOD GetSecurityInfo(nsISupports **aSecurityInfo);
NS_IMETHOD AsyncOpen(nsIStreamListener *listener, nsISupports *aContext);
// nsIHttpChannelInternal
NS_IMETHOD SetupFallbackChannel(const char *aFallbackKey);
// nsISupportsPriority
NS_IMETHOD SetPriority(PRInt32 value);
// nsIResumableChannel
NS_IMETHOD ResumeAt(PRUint64 startPos, const nsACString& entityID);
public: /* internal necko use only */
void InternalSetUploadStream(nsIInputStream *uploadStream)
{ mUploadStream = uploadStream; }
void SetUploadStreamHasHeaders(bool hasHeaders)
{ mUploadStreamHasHeaders = hasHeaders; }
nsresult SetReferrerInternal(nsIURI *referrer) {
nsCAutoString spec;
nsresult rv = referrer->GetAsciiSpec(spec);
if (NS_FAILED(rv)) return rv;
mReferrer = referrer;
mRequestHead.SetHeader(nsHttp::Referer, spec);
return NS_OK;
}
private:
typedef nsresult (nsHttpChannel::*nsContinueRedirectionFunc)(nsresult result);
bool RequestIsConditional();
nsresult Connect(bool firstTime = true);
nsresult SetupTransaction();
nsresult CallOnStartRequest();
nsresult ProcessResponse();
nsresult ContinueProcessResponse(nsresult);
nsresult ProcessNormal();
nsresult ContinueProcessNormal(nsresult);
nsresult ProcessNotModified();
nsresult AsyncProcessRedirection(PRUint32 httpStatus);
nsresult ContinueProcessRedirection(nsresult);
nsresult ContinueProcessRedirectionAfterFallback(nsresult);
bool ShouldSSLProxyResponseContinue(PRUint32 httpStatus);
nsresult ProcessFailedSSLConnect(PRUint32 httpStatus);
nsresult ProcessFallback(bool *waitingForRedirectCallback);
nsresult ContinueProcessFallback(nsresult);
bool ResponseWouldVary();
void HandleAsyncAbort();
nsresult ContinueOnStartRequest1(nsresult);
nsresult ContinueOnStartRequest2(nsresult);
nsresult ContinueOnStartRequest3(nsresult);
// redirection specific methods
void HandleAsyncRedirect();
nsresult ContinueHandleAsyncRedirect(nsresult);
void HandleAsyncNotModified();
void HandleAsyncFallback();
nsresult ContinueHandleAsyncFallback(nsresult);
nsresult PromptTempRedirect();
virtual nsresult SetupReplacementChannel(nsIURI *, nsIChannel *,
bool preserveMethod,
bool forProxy);
// proxy specific methods
nsresult ProxyFailover();
nsresult AsyncDoReplaceWithProxy(nsIProxyInfo *);
nsresult ContinueDoReplaceWithProxy(nsresult);
void HandleAsyncReplaceWithProxy();
nsresult ContinueHandleAsyncReplaceWithProxy(nsresult);
nsresult ResolveProxy();
// cache specific methods
nsresult OpenCacheEntry();
nsresult OnOfflineCacheEntryAvailable(nsICacheEntryDescriptor *aEntry,
nsCacheAccessMode aAccess,
nsresult aResult,
bool aSync);
nsresult OpenNormalCacheEntry(bool aSync);
nsresult OnNormalCacheEntryAvailable(nsICacheEntryDescriptor *aEntry,
nsCacheAccessMode aAccess,
nsresult aResult,
bool aSync);
nsresult OpenOfflineCacheEntryForWriting();
nsresult GenerateCacheKey(PRUint32 postID, nsACString &key);
nsresult UpdateExpirationTime();
nsresult CheckCache();
nsresult ShouldUpdateOfflineCacheEntry(bool *shouldCacheForOfflineUse);
nsresult ReadFromCache();
void CloseCacheEntry(bool doomOnFailure);
void CloseOfflineCacheEntry();
nsresult InitCacheEntry();
void UpdateInhibitPersistentCachingFlag();
nsresult InitOfflineCacheEntry();
nsresult AddCacheEntryHeaders(nsICacheEntryDescriptor *entry);
nsresult StoreAuthorizationMetaData(nsICacheEntryDescriptor *entry);
nsresult FinalizeCacheEntry();
nsresult InstallCacheListener(PRUint32 offset = 0);
nsresult InstallOfflineCacheListener();
void MaybeInvalidateCacheEntryForSubsequentGet();
nsCacheStoragePolicy DetermineStoragePolicy();
nsresult DetermineCacheAccess(nsCacheAccessMode *_retval);
void AsyncOnExamineCachedResponse();
// Handle the bogus Content-Encoding Apache sometimes sends
void ClearBogusContentEncodingIfNeeded();
// byte range request specific methods
nsresult SetupByteRangeRequest(PRUint32 partialLen);
nsresult ProcessPartialContent();
nsresult OnDoneReadingPartialCacheEntry(bool *streamDone);
nsresult DoAuthRetry(nsAHttpConnection *);
bool MustValidateBasedOnQueryUrl();
void HandleAsyncRedirectChannelToHttps();
nsresult AsyncRedirectChannelToHttps();
nsresult ContinueAsyncRedirectChannelToHttps(nsresult rv);
/**
* A function that takes care of reading STS headers and enforcing STS
* load rules. After a secure channel is erected, STS requires the channel
* to be trusted or any STS header data on the channel is ignored.
* This is called from ProcessResponse.
*/
nsresult ProcessSTSHeader();
/**
* Computes and returns a 64 bit encoded string holding a hash of the
* input buffer. Input buffer must be a null-terminated string.
*/
nsresult Hash(const char *buf, nsACString &hash);
void InvalidateCacheEntryForLocation(const char *location);
void AssembleCacheKey(const char *spec, PRUint32 postID, nsACString &key);
nsresult CreateNewURI(const char *loc, nsIURI **newURI);
void DoInvalidateCacheEntry(nsACString &key);
// Ref RFC2616 13.10: "invalidation... MUST only be performed if
// the host part is the same as in the Request-URI"
inline bool HostPartIsTheSame(nsIURI *uri) {
nsCAutoString tmpHost1, tmpHost2;
return (NS_SUCCEEDED(mURI->GetAsciiHost(tmpHost1)) &&
NS_SUCCEEDED(uri->GetAsciiHost(tmpHost2)) &&
(tmpHost1 == tmpHost2));
}
private:
nsCOMPtr<nsISupports> mSecurityInfo;
nsCOMPtr<nsICancelable> mProxyRequest;
nsRefPtr<nsInputStreamPump> mTransactionPump;
nsRefPtr<nsHttpTransaction> mTransaction;
PRUint64 mLogicalOffset;
// cache specific data
nsCOMPtr<nsICacheEntryDescriptor> mCacheEntry;
nsRefPtr<nsInputStreamPump> mCachePump;
nsAutoPtr<nsHttpResponseHead> mCachedResponseHead;
nsCacheAccessMode mCacheAccess;
PRUint32 mPostID;
PRUint32 mRequestTime;
typedef nsresult (nsHttpChannel:: *nsOnCacheEntryAvailableCallback)(
nsICacheEntryDescriptor *, nsCacheAccessMode, nsresult, bool);
nsOnCacheEntryAvailableCallback mOnCacheEntryAvailableCallback;
bool mAsyncCacheOpen;
nsCOMPtr<nsICacheEntryDescriptor> mOfflineCacheEntry;
nsCacheAccessMode mOfflineCacheAccess;
nsCString mOfflineCacheClientID;
// auth specific data
nsCOMPtr<nsIHttpChannelAuthProvider> mAuthProvider;
// Proxy info to replace with
nsCOMPtr<nsIProxyInfo> mTargetProxyInfo;
// If the channel is associated with a cache, and the URI matched
// a fallback namespace, this will hold the key for the fallback
// cache entry.
nsCString mFallbackKey;
friend class AutoRedirectVetoNotifier;
friend class HttpAsyncAborter<nsHttpChannel>;
nsCOMPtr<nsIURI> mRedirectURI;
nsCOMPtr<nsIChannel> mRedirectChannel;
PRUint32 mRedirectType;
// state flags
PRUint32 mCachedContentIsValid : 1;
PRUint32 mCachedContentIsPartial : 1;
PRUint32 mTransactionReplaced : 1;
PRUint32 mAuthRetryPending : 1;
PRUint32 mResuming : 1;
PRUint32 mInitedCacheEntry : 1;
PRUint32 mCacheForOfflineUse : 1;
// True if mCacheForOfflineUse was set because we were caching
// opportunistically.
PRUint32 mCachingOpportunistically : 1;
// True if we are loading a fallback cache entry from the
// application cache.
PRUint32 mFallbackChannel : 1;
// True if consumer added its own If-None-Match or If-Modified-Since
// headers. In such a case we must not override them in the cache code
// and also we want to pass possible 304 code response through.
PRUint32 mCustomConditionalRequest : 1;
PRUint32 mFallingBack : 1;
PRUint32 mWaitingForRedirectCallback : 1;
// True if mRequestTime has been set. In such a case it is safe to update
// the cache entry's expiration time. Otherwise, it is not(see bug 567360).
PRUint32 mRequestTimeInitialized : 1;
nsTArray<nsContinueRedirectionFunc> mRedirectFuncStack;
nsCOMPtr<nsICryptoHash> mHasher;
PRTime mChannelCreationTime;
mozilla::TimeStamp mChannelCreationTimestamp;
mozilla::TimeStamp mAsyncOpenTime;
mozilla::TimeStamp mCacheReadStart;
mozilla::TimeStamp mCacheReadEnd;
// copied from the transaction before we null out mTransaction
// so that the timing can still be queried from OnStopRequest
TimingStruct mTransactionTimings;
// Needed for accurate DNS timing
nsRefPtr<nsDNSPrefetch> mDNSPrefetch;
nsresult WaitForRedirectCallback();
void PushRedirectAsyncFunc(nsContinueRedirectionFunc func);
void PopRedirectAsyncFunc(nsContinueRedirectionFunc func);
protected:
virtual void DoNotifyListenerCleanup();
private: // cache telemetry
enum {
kCacheHit = 1,
kCacheHitViaReval = 2,
kCacheMissedViaReval = 3,
kCacheMissed = 4
};
bool mDidReval;
};
#endif // nsHttpChannel_h__
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