gecko/netwerk/protocol/http/nsHttpConnection.h

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9.8 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 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)
*
* 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 nsHttpConnection_h__
#define nsHttpConnection_h__
#include "nsHttp.h"
#include "nsHttpConnectionInfo.h"
#include "nsAHttpConnection.h"
#include "nsAHttpTransaction.h"
#include "nsXPIDLString.h"
#include "nsCOMPtr.h"
#include "nsAutoPtr.h"
#include "prinrval.h"
#include "SpdySession.h"
#include "nsIStreamListener.h"
#include "nsISocketTransport.h"
#include "nsIAsyncInputStream.h"
#include "nsIAsyncOutputStream.h"
#include "nsIInterfaceRequestor.h"
#include "nsIEventTarget.h"
//-----------------------------------------------------------------------------
// nsHttpConnection - represents a connection to a HTTP server (or proxy)
//
// NOTE: this objects lives on the socket thread only. it should not be
// accessed from any other thread.
//-----------------------------------------------------------------------------
class nsHttpConnection : public nsAHttpSegmentReader
, public nsAHttpSegmentWriter
, public nsIInputStreamCallback
, public nsIOutputStreamCallback
, public nsITransportEventSink
, public nsIInterfaceRequestor
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSAHTTPSEGMENTREADER
NS_DECL_NSAHTTPSEGMENTWRITER
NS_DECL_NSIINPUTSTREAMCALLBACK
NS_DECL_NSIOUTPUTSTREAMCALLBACK
NS_DECL_NSITRANSPORTEVENTSINK
NS_DECL_NSIINTERFACEREQUESTOR
nsHttpConnection();
virtual ~nsHttpConnection();
// Initialize the connection:
// info - specifies the connection parameters.
// maxHangTime - limits the amount of time this connection can spend on a
// single transaction before it should no longer be kept
// alive. a value of 0xffff indicates no limit.
nsresult Init(nsHttpConnectionInfo *info, PRUint16 maxHangTime,
nsISocketTransport *, nsIAsyncInputStream *,
nsIAsyncOutputStream *, nsIInterfaceRequestor *,
nsIEventTarget *);
// Activate causes the given transaction to be processed on this
// connection. It fails if there is already an existing transaction unless
// a multiplexing protocol such as SPDY is being used
nsresult Activate(nsAHttpTransaction *, PRUint8 caps, PRInt32 pri);
// Close the underlying socket transport.
void Close(nsresult reason);
//-------------------------------------------------------------------------
// XXX document when these are ok to call
bool SupportsPipelining() { return mSupportsPipelining; }
bool IsKeepAlive() { return mUsingSpdy ||
(mKeepAliveMask && mKeepAlive); }
bool CanReuse(); // can this connection be reused?
bool CanDirectlyActivate();
// Returns time in seconds for how long connection can be reused.
PRUint32 TimeToLive();
void DontReuse();
void DropTransport() { DontReuse(); mSocketTransport = 0; }
bool LastTransactionExpectedNoContent()
{
return mLastTransactionExpectedNoContent;
}
void SetLastTransactionExpectedNoContent(bool val)
{
mLastTransactionExpectedNoContent = val;
}
nsISocketTransport *Transport() { return mSocketTransport; }
nsAHttpTransaction *Transaction() { return mTransaction; }
nsHttpConnectionInfo *ConnectionInfo() { return mConnInfo; }
// nsAHttpConnection compatible methods (non-virtual):
nsresult OnHeadersAvailable(nsAHttpTransaction *, nsHttpRequestHead *, nsHttpResponseHead *, bool *reset);
void CloseTransaction(nsAHttpTransaction *, nsresult reason);
void GetConnectionInfo(nsHttpConnectionInfo **ci) { NS_IF_ADDREF(*ci = mConnInfo); }
nsresult TakeTransport(nsISocketTransport **,
nsIAsyncInputStream **,
nsIAsyncOutputStream **);
void GetSecurityInfo(nsISupports **);
bool IsPersistent() { return IsKeepAlive(); }
bool IsReused();
void SetIsReusedAfter(PRUint32 afterMilliseconds);
void SetIdleTimeout(PRUint16 val) {mIdleTimeout = val;}
nsresult PushBack(const char *data, PRUint32 length);
nsresult ResumeSend();
nsresult ResumeRecv();
PRInt64 MaxBytesRead() {return mMaxBytesRead;}
static NS_METHOD ReadFromStream(nsIInputStream *, void *, const char *,
PRUint32, PRUint32, PRUint32 *);
// When a persistent connection is in the connection manager idle
// connection pool, the nsHttpConnection still reads errors and hangups
// on the socket so that it can be proactively released if the server
// initiates a termination. Only call on socket thread.
void BeginIdleMonitoring();
void EndIdleMonitoring();
bool UsingSpdy() { return mUsingSpdy; }
private:
// called to cause the underlying socket to start speaking SSL
nsresult ProxyStartSSL();
nsresult OnTransactionDone(nsresult reason);
nsresult OnSocketWritable();
nsresult OnSocketReadable();
nsresult SetupProxyConnect();
bool IsAlive();
bool SupportsPipelining(nsHttpResponseHead *);
// Makes certain the SSL handshake is complete and NPN negotiation
// has had a chance to happen
bool EnsureNPNComplete();
void SetupNPN(PRUint8 caps);
// Inform the connection manager of any SPDY Alternate-Protocol
// redirections
void HandleAlternateProtocol(nsHttpResponseHead *);
// Start the Spdy transaction handler when NPN indicates spdy/2
void StartSpdy();
// Directly Add a transaction to an active connection for SPDY
nsresult AddTransaction(nsAHttpTransaction *, PRInt32);
private:
nsCOMPtr<nsISocketTransport> mSocketTransport;
nsCOMPtr<nsIAsyncInputStream> mSocketIn;
nsCOMPtr<nsIAsyncOutputStream> mSocketOut;
nsresult mSocketInCondition;
nsresult mSocketOutCondition;
nsCOMPtr<nsIInputStream> mProxyConnectStream;
nsCOMPtr<nsIInputStream> mRequestStream;
// mTransaction only points to the HTTP Transaction callbacks if the
// transaction is open, otherwise it is null.
nsRefPtr<nsAHttpTransaction> mTransaction;
nsCOMPtr<nsIInterfaceRequestor> mCallbacks;
nsCOMPtr<nsIEventTarget> mCallbackTarget;
nsRefPtr<nsHttpConnectionInfo> mConnInfo;
PRUint32 mLastReadTime;
PRUint16 mMaxHangTime; // max download time before dropping keep-alive status
PRUint16 mIdleTimeout; // value of keep-alive: timeout=
PRIntervalTime mConsiderReusedAfterInterval;
PRIntervalTime mConsiderReusedAfterEpoch;
PRInt64 mCurrentBytesRead; // data read per activation
PRInt64 mMaxBytesRead; // max read in 1 activation
PRInt64 mTotalBytesRead; // total data read
nsRefPtr<nsIAsyncInputStream> mInputOverflow;
bool mKeepAlive;
bool mKeepAliveMask;
bool mSupportsPipelining;
bool mIsReused;
bool mCompletedProxyConnect;
bool mLastTransactionExpectedNoContent;
bool mIdleMonitoring;
// The number of <= HTTP/1.1 transactions performed on this connection. This
// excludes spdy transactions.
PRUint32 mHttp1xTransactionCount;
// SPDY related
bool mNPNComplete;
bool mSetupNPNCalled;
bool mUsingSpdy;
nsRefPtr<mozilla::net::SpdySession> mSpdySession;
PRInt32 mPriority;
bool mReportedSpdy;
// mUsingSpdy is cleared when mSpdySession is freed, this is permanent
bool mEverUsedSpdy;
};
#endif // nsHttpConnection_h__