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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.
130 lines
4.4 KiB
C++
130 lines
4.4 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 nsHttpPipeline_h__
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#define nsHttpPipeline_h__
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#include "nsHttp.h"
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#include "nsAHttpConnection.h"
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#include "nsAHttpTransaction.h"
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#include "nsIInputStream.h"
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#include "nsIOutputStream.h"
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#include "nsTArray.h"
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#include "nsCOMPtr.h"
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class nsHttpPipeline : public nsAHttpConnection
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, public nsAHttpTransaction
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, public nsAHttpSegmentReader
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{
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSAHTTPCONNECTION
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NS_DECL_NSAHTTPTRANSACTION
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NS_DECL_NSAHTTPSEGMENTREADER
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nsHttpPipeline();
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virtual ~nsHttpPipeline();
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private:
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nsresult FillSendBuf();
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static NS_METHOD ReadFromPipe(nsIInputStream *, void *, const char *,
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PRUint32, PRUint32, PRUint32 *);
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// convenience functions
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nsAHttpTransaction *Request(PRInt32 i)
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{
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if (mRequestQ.Length() == 0)
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return nsnull;
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return mRequestQ[i];
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}
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nsAHttpTransaction *Response(PRInt32 i)
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{
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if (mResponseQ.Length() == 0)
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return nsnull;
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return mResponseQ[i];
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}
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// overload of nsAHttpTransaction::QueryPipeline()
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nsHttpPipeline *QueryPipeline();
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nsAHttpConnection *mConnection;
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nsTArray<nsAHttpTransaction*> mRequestQ; // array of transactions
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nsTArray<nsAHttpTransaction*> mResponseQ; // array of transactions
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nsresult mStatus;
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// these flags indicate whether or not the first request or response
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// is partial. a partial request means that Request(0) has been
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// partially written out to the socket. a partial response means
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// that Response(0) has been partially read in from the socket.
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bool mRequestIsPartial;
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bool mResponseIsPartial;
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// indicates whether or not the pipeline has been explicitly closed.
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bool mClosed;
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// indicates whether or not a true pipeline (more than 1 request without
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// a synchronous response) has been formed.
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bool mUtilizedPipeline;
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// used when calling ReadSegments/WriteSegments on a transaction.
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nsAHttpSegmentReader *mReader;
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nsAHttpSegmentWriter *mWriter;
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// send buffer
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nsCOMPtr<nsIInputStream> mSendBufIn;
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nsCOMPtr<nsIOutputStream> mSendBufOut;
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// the push back buffer. not exceeding nsIOService::gDefaultSegmentSize bytes.
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char *mPushBackBuf;
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PRUint32 mPushBackLen;
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PRUint32 mPushBackMax;
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// The number of transactions completed on this pipeline.
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PRUint32 mHttp1xTransactionCount;
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// For support of OnTransportStatus()
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PRUint64 mReceivingFromProgress;
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PRUint64 mSendingToProgress;
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bool mSuppressSendEvents;
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};
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#endif // nsHttpPipeline_h__
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