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b42fe35654
When a connection that involves a pipelined transaction has been stalled (i.e. idle with an open transaction, not an idle persistent connection) for a second move any transactions that are pipelined after the current one onto different connections (and implicitly close this connection when done with the current transaction). when it has been stalled for 10 seconds (pref configurable), cancel the current transaction itself too - depending on its state it can hopefully be restarted on a clean connection.
277 lines
11 KiB
C++
277 lines
11 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is Mozilla.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications.
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* Portions created by the Initial Developer are Copyright (C) 2001
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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* Darin Fisher <darin@netscape.com> (original author)
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef nsHttpConnection_h__
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#define nsHttpConnection_h__
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#include "nsHttp.h"
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#include "nsHttpConnectionInfo.h"
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#include "nsAHttpTransaction.h"
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#include "nsHttpPipeline.h"
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#include "nsXPIDLString.h"
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#include "nsCOMPtr.h"
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#include "nsAutoPtr.h"
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#include "prinrval.h"
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#include "SpdySession.h"
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#include "mozilla/TimeStamp.h"
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#include "nsIStreamListener.h"
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#include "nsISocketTransport.h"
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#include "nsIAsyncInputStream.h"
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#include "nsIAsyncOutputStream.h"
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#include "nsIInterfaceRequestor.h"
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#include "nsIEventTarget.h"
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class nsHttpRequestHead;
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class nsHttpResponseHead;
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//-----------------------------------------------------------------------------
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// nsHttpConnection - represents a connection to a HTTP server (or proxy)
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//
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// NOTE: this objects lives on the socket thread only. it should not be
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// accessed from any other thread.
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//-----------------------------------------------------------------------------
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class nsHttpConnection : public nsAHttpSegmentReader
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, public nsAHttpSegmentWriter
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, public nsIInputStreamCallback
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, public nsIOutputStreamCallback
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, public nsITransportEventSink
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, public nsIInterfaceRequestor
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSAHTTPSEGMENTREADER
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NS_DECL_NSAHTTPSEGMENTWRITER
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NS_DECL_NSIINPUTSTREAMCALLBACK
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NS_DECL_NSIOUTPUTSTREAMCALLBACK
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NS_DECL_NSITRANSPORTEVENTSINK
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NS_DECL_NSIINTERFACEREQUESTOR
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nsHttpConnection();
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virtual ~nsHttpConnection();
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// Initialize the connection:
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// info - specifies the connection parameters.
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// maxHangTime - limits the amount of time this connection can spend on a
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// single transaction before it should no longer be kept
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// alive. a value of 0xffff indicates no limit.
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nsresult Init(nsHttpConnectionInfo *info, PRUint16 maxHangTime,
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nsISocketTransport *, nsIAsyncInputStream *,
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nsIAsyncOutputStream *, nsIInterfaceRequestor *,
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nsIEventTarget *, PRIntervalTime);
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// Activate causes the given transaction to be processed on this
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// connection. It fails if there is already an existing transaction unless
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// a multiplexing protocol such as SPDY is being used
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nsresult Activate(nsAHttpTransaction *, PRUint8 caps, PRInt32 pri);
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// Close the underlying socket transport.
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void Close(nsresult reason);
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//-------------------------------------------------------------------------
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// XXX document when these are ok to call
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bool SupportsPipelining();
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bool IsKeepAlive() { return mUsingSpdy ||
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(mKeepAliveMask && mKeepAlive); }
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bool CanReuse(); // can this connection be reused?
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bool CanDirectlyActivate();
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// Returns time in seconds for how long connection can be reused.
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PRUint32 TimeToLive();
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void DontReuse();
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void DropTransport() { DontReuse(); mSocketTransport = 0; }
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bool IsProxyConnectInProgress()
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{
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return mProxyConnectInProgress;
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}
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bool LastTransactionExpectedNoContent()
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{
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return mLastTransactionExpectedNoContent;
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}
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void SetLastTransactionExpectedNoContent(bool val)
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{
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mLastTransactionExpectedNoContent = val;
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}
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nsISocketTransport *Transport() { return mSocketTransport; }
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nsAHttpTransaction *Transaction() { return mTransaction; }
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nsHttpConnectionInfo *ConnectionInfo() { return mConnInfo; }
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// nsAHttpConnection compatible methods (non-virtual):
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nsresult OnHeadersAvailable(nsAHttpTransaction *, nsHttpRequestHead *, nsHttpResponseHead *, bool *reset);
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void CloseTransaction(nsAHttpTransaction *, nsresult reason);
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void GetConnectionInfo(nsHttpConnectionInfo **ci) { NS_IF_ADDREF(*ci = mConnInfo); }
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nsresult TakeTransport(nsISocketTransport **,
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nsIAsyncInputStream **,
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nsIAsyncOutputStream **);
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void GetSecurityInfo(nsISupports **);
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bool IsPersistent() { return IsKeepAlive(); }
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bool IsReused();
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void SetIsReusedAfter(PRUint32 afterMilliseconds);
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void SetIdleTimeout(PRIntervalTime val) {mIdleTimeout = val;}
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nsresult PushBack(const char *data, PRUint32 length);
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nsresult ResumeSend();
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nsresult ResumeRecv();
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PRInt64 MaxBytesRead() {return mMaxBytesRead;}
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static NS_METHOD ReadFromStream(nsIInputStream *, void *, const char *,
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PRUint32, PRUint32, PRUint32 *);
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// When a persistent connection is in the connection manager idle
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// connection pool, the nsHttpConnection still reads errors and hangups
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// on the socket so that it can be proactively released if the server
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// initiates a termination. Only call on socket thread.
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void BeginIdleMonitoring();
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void EndIdleMonitoring();
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bool UsingSpdy() { return mUsingSpdy; }
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// When the connection is active this is called every 1 second
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void ReadTimeoutTick(PRIntervalTime now);
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nsAHttpTransaction::Classifier Classification() { return mClassification; }
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void Classify(nsAHttpTransaction::Classifier newclass)
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{
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mClassification = newclass;
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}
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// When the connection is active this is called every second
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void ReadTimeoutTick();
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private:
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// called to cause the underlying socket to start speaking SSL
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nsresult ProxyStartSSL();
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nsresult OnTransactionDone(nsresult reason);
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nsresult OnSocketWritable();
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nsresult OnSocketReadable();
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nsresult SetupProxyConnect();
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PRIntervalTime IdleTime();
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bool IsAlive();
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bool SupportsPipelining(nsHttpResponseHead *);
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// Makes certain the SSL handshake is complete and NPN negotiation
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// has had a chance to happen
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bool EnsureNPNComplete();
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void SetupNPN(PRUint8 caps);
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// Inform the connection manager of any SPDY Alternate-Protocol
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// redirections
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void HandleAlternateProtocol(nsHttpResponseHead *);
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// Start the Spdy transaction handler when NPN indicates spdy/2
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void StartSpdy();
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// Directly Add a transaction to an active connection for SPDY
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nsresult AddTransaction(nsAHttpTransaction *, PRInt32);
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private:
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nsCOMPtr<nsISocketTransport> mSocketTransport;
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nsCOMPtr<nsIAsyncInputStream> mSocketIn;
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nsCOMPtr<nsIAsyncOutputStream> mSocketOut;
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nsresult mSocketInCondition;
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nsresult mSocketOutCondition;
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nsCOMPtr<nsIInputStream> mProxyConnectStream;
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nsCOMPtr<nsIInputStream> mRequestStream;
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// mTransaction only points to the HTTP Transaction callbacks if the
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// transaction is open, otherwise it is null.
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nsRefPtr<nsAHttpTransaction> mTransaction;
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nsCOMPtr<nsIInterfaceRequestor> mCallbacks;
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nsCOMPtr<nsIEventTarget> mCallbackTarget;
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nsRefPtr<nsHttpConnectionInfo> mConnInfo;
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PRIntervalTime mLastReadTime;
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PRIntervalTime mMaxHangTime; // max download time before dropping keep-alive status
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PRIntervalTime mIdleTimeout; // value of keep-alive: timeout=
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PRIntervalTime mConsiderReusedAfterInterval;
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PRIntervalTime mConsiderReusedAfterEpoch;
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PRInt64 mCurrentBytesRead; // data read per activation
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PRInt64 mMaxBytesRead; // max read in 1 activation
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PRInt64 mTotalBytesRead; // total data read
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nsRefPtr<nsIAsyncInputStream> mInputOverflow;
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PRIntervalTime mRtt;
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bool mKeepAlive;
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bool mKeepAliveMask;
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bool mSupportsPipelining;
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bool mIsReused;
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bool mCompletedProxyConnect;
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bool mLastTransactionExpectedNoContent;
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bool mIdleMonitoring;
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bool mProxyConnectInProgress;
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// The number of <= HTTP/1.1 transactions performed on this connection. This
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// excludes spdy transactions.
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PRUint32 mHttp1xTransactionCount;
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// Keep-Alive: max="mRemainingConnectionUses" provides the number of future
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// transactions (including the current one) that the server expects to allow
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// on this persistent connection.
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PRUint32 mRemainingConnectionUses;
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nsAHttpTransaction::Classifier mClassification;
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// SPDY related
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bool mNPNComplete;
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bool mSetupNPNCalled;
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bool mUsingSpdy;
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nsRefPtr<mozilla::net::SpdySession> mSpdySession;
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PRInt32 mPriority;
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bool mReportedSpdy;
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// mUsingSpdy is cleared when mSpdySession is freed, this is permanent
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bool mEverUsedSpdy;
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};
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#endif // nsHttpConnection_h__
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