gecko/netwerk/protocol/http/nsHttpTransaction.h
Patrick McManus 0d5cfec907 bug 628832 - fix regression in http/0.9 detection from 363109; r=zbarsky a=blocking-2.0
* instead of making (dis)-allow 0.9 a property of connection info,
  work off a state machine that engages in the liberal skipping of
  junk before response headers only immediately after a no-content
  response on the same connection.

* when scanning for response headers in a large amount of junk place a
  non infinite limit on that (128KB).. the only known use case for
  this is skipping illegal message bodies in 304's and those just
  aren't that big.

--HG--
extra : rebase_source : 433fd6aae237d29a9957b1a70cf1e756af5a8af0
2011-01-27 13:34:39 -05:00

223 lines
9.4 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 nsHttpTransaction_h__
#define nsHttpTransaction_h__
#include "nsHttp.h"
#include "nsHttpHeaderArray.h"
#include "nsAHttpTransaction.h"
#include "nsAHttpConnection.h"
#include "nsCOMPtr.h"
#include "nsInt64.h"
#include "nsIPipe.h"
#include "nsIInputStream.h"
#include "nsIOutputStream.h"
#include "nsIInterfaceRequestor.h"
#include "nsISocketTransportService.h"
#include "nsITransport.h"
#include "nsIEventTarget.h"
//-----------------------------------------------------------------------------
class nsHttpTransaction;
class nsHttpRequestHead;
class nsHttpResponseHead;
class nsHttpChunkedDecoder;
class nsIHttpActivityObserver;
//-----------------------------------------------------------------------------
// nsHttpTransaction represents a single HTTP transaction. It is thread-safe,
// intended to run on the socket thread.
//-----------------------------------------------------------------------------
class nsHttpTransaction : public nsAHttpTransaction
, public nsIInputStreamCallback
, public nsIOutputStreamCallback
{
public:
NS_DECL_ISUPPORTS
NS_DECL_NSAHTTPTRANSACTION
NS_DECL_NSIINPUTSTREAMCALLBACK
NS_DECL_NSIOUTPUTSTREAMCALLBACK
nsHttpTransaction();
virtual ~nsHttpTransaction();
//
// called to initialize the transaction
//
// @param caps
// the transaction capabilities (see nsHttp.h)
// @param connInfo
// the connection type for this transaction.
// @param reqHeaders
// the request header struct
// @param reqBody
// the request body (POST or PUT data stream)
// @param reqBodyIncludesHeaders
// fun stuff to support NPAPI plugins.
// @param target
// the dispatch target were notifications should be sent.
// @param callbacks
// the notification callbacks to be given to PSM.
// @param responseBody
// the input stream that will contain the response data. async
// wait on this input stream for data. on first notification,
// headers should be available (check transaction status).
//
nsresult Init(PRUint8 caps,
nsHttpConnectionInfo *connInfo,
nsHttpRequestHead *reqHeaders,
nsIInputStream *reqBody,
PRBool reqBodyIncludesHeaders,
nsIEventTarget *consumerTarget,
nsIInterfaceRequestor *callbacks,
nsITransportEventSink *eventsink,
nsIAsyncInputStream **responseBody);
// attributes
PRUint8 Caps() { return mCaps; }
nsHttpConnectionInfo *ConnectionInfo() { return mConnInfo; }
nsHttpRequestHead *RequestHead() { return mRequestHead; }
nsHttpResponseHead *ResponseHead() { return mHaveAllHeaders ? mResponseHead : nsnull; }
nsISupports *SecurityInfo() { return mSecurityInfo; }
nsIInterfaceRequestor *Callbacks() { return mCallbacks; }
nsIEventTarget *ConsumerTarget() { return mConsumerTarget; }
nsAHttpConnection *Connection() { return mConnection; }
// Called to take ownership of the response headers; the transaction
// will drop any reference to the response headers after this call.
nsHttpResponseHead *TakeResponseHead();
// Called to find out if the transaction generated a complete response.
PRBool ResponseIsComplete() { return mResponseIsComplete; }
void SetSSLConnectFailed() { mSSLConnectFailed = PR_TRUE; }
PRBool SSLConnectFailed() { return mSSLConnectFailed; }
// These methods may only be used by the connection manager.
void SetPriority(PRInt32 priority) { mPriority = priority; }
PRInt32 Priority() { return mPriority; }
private:
nsresult Restart();
char *LocateHttpStart(char *buf, PRUint32 len,
PRBool aAllowPartialMatch);
void ParseLine(char *line);
nsresult ParseLineSegment(char *seg, PRUint32 len);
nsresult ParseHead(char *, PRUint32 count, PRUint32 *countRead);
nsresult HandleContentStart();
nsresult HandleContent(char *, PRUint32 count, PRUint32 *contentRead, PRUint32 *contentRemaining);
nsresult ProcessData(char *, PRUint32, PRUint32 *);
void DeleteSelfOnConsumerThread();
static NS_METHOD ReadRequestSegment(nsIInputStream *, void *, const char *,
PRUint32, PRUint32, PRUint32 *);
static NS_METHOD WritePipeSegment(nsIOutputStream *, void *, char *,
PRUint32, PRUint32, PRUint32 *);
private:
nsCOMPtr<nsIInterfaceRequestor> mCallbacks;
nsCOMPtr<nsITransportEventSink> mTransportSink;
nsCOMPtr<nsIEventTarget> mConsumerTarget;
nsCOMPtr<nsISupports> mSecurityInfo;
nsCOMPtr<nsIAsyncInputStream> mPipeIn;
nsCOMPtr<nsIAsyncOutputStream> mPipeOut;
nsCOMPtr<nsISupports> mChannel;
nsCOMPtr<nsIHttpActivityObserver> mActivityDistributor;
nsCString mReqHeaderBuf; // flattened request headers
nsCOMPtr<nsIInputStream> mRequestStream;
PRUint32 mRequestSize;
nsAHttpConnection *mConnection; // hard ref
nsHttpConnectionInfo *mConnInfo; // hard ref
nsHttpRequestHead *mRequestHead; // weak ref
nsHttpResponseHead *mResponseHead; // hard ref
nsAHttpSegmentReader *mReader;
nsAHttpSegmentWriter *mWriter;
nsCString mLineBuf; // may contain a partial line
nsInt64 mContentLength; // equals -1 if unknown
nsInt64 mContentRead; // count of consumed content bytes
// After a 304/204 or other "no-content" style response we will skip over
// up to MAX_INVALID_RESPONSE_BODY_SZ bytes when looking for the next
// response header to deal with servers that actually sent a response
// body where they should not have. This member tracks how many bytes have
// so far been skipped.
PRUint32 mInvalidResponseBytesRead;
nsHttpChunkedDecoder *mChunkedDecoder;
nsresult mStatus;
PRInt16 mPriority;
PRUint16 mRestartCount; // the number of times this transaction has been restarted
PRUint8 mCaps;
// state flags
PRUint32 mClosed : 1;
PRUint32 mConnected : 1;
PRUint32 mHaveStatusLine : 1;
PRUint32 mHaveAllHeaders : 1;
PRUint32 mTransactionDone : 1;
PRUint32 mResponseIsComplete : 1;
PRUint32 mDidContentStart : 1;
PRUint32 mNoContent : 1; // expecting an empty entity body
PRUint32 mSentData : 1;
PRUint32 mReceivedData : 1;
PRUint32 mStatusEventPending : 1;
PRUint32 mHasRequestBody : 1;
PRUint32 mSSLConnectFailed : 1;
PRUint32 mHttpResponseMatched: 1;
// mClosed := transaction has been explicitly closed
// mTransactionDone := transaction ran to completion or was interrupted
// mResponseComplete := transaction ran to completion
};
#endif // nsHttpTransaction_h__