mirror of
https://github.com/rn10950/RetroZilla.git
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201 lines
7.6 KiB
C++
201 lines
7.6 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.org code.
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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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 __nsmultimixedconv__h__
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#define __nsmultimixedconv__h__
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#include "nsIStreamConverter.h"
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#include "nsIChannel.h"
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#include "nsIURI.h"
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#include "nsString.h"
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#include "nsXPIDLString.h"
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#include "nsCOMPtr.h"
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#include "nsInt64.h"
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#include "nsIByteRangeRequest.h"
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#include "nsIMultiPartChannel.h"
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#include "nsAutoPtr.h"
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#define NS_MULTIMIXEDCONVERTER_CID \
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{ /* 7584CE90-5B25-11d3-A175-0050041CAF44 */ \
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0x7584ce90, \
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0x5b25, \
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0x11d3, \
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{0xa1, 0x75, 0x0, 0x50, 0x4, 0x1c, 0xaf, 0x44} \
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}
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//
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// nsPartChannel is a "dummy" channel which represents an individual part of
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// a multipart/mixed stream...
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//
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// Instances on this channel are passed out to the consumer through the
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// nsIStreamListener interface.
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//
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class nsPartChannel : public nsIChannel,
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public nsIByteRangeRequest,
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public nsIMultiPartChannel
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{
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public:
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nsPartChannel(nsIChannel *aMultipartChannel, PRUint32 aPartID,
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nsIStreamListener* aListener);
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void InitializeByteRange(PRInt64 aStart, PRInt64 aEnd);
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void SetIsLastPart() { mIsLastPart = PR_TRUE; }
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nsresult SendOnStartRequest(nsISupports* aContext);
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nsresult SendOnDataAvailable(nsISupports* aContext, nsIInputStream* aStream,
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PRUint32 aOffset, PRUint32 aLen);
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nsresult SendOnStopRequest(nsISupports* aContext, nsresult aStatus);
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NS_DECL_ISUPPORTS
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NS_DECL_NSIREQUEST
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NS_DECL_NSICHANNEL
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NS_DECL_NSIBYTERANGEREQUEST
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NS_DECL_NSIMULTIPARTCHANNEL
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protected:
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~nsPartChannel();
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protected:
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nsCOMPtr<nsIChannel> mMultipartChannel;
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nsCOMPtr<nsIStreamListener> mListener;
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nsresult mStatus;
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nsLoadFlags mLoadFlags;
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nsCOMPtr<nsILoadGroup> mLoadGroup;
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nsCString mContentType;
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nsCString mContentCharset;
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nsCString mContentDisposition;
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nsUint64 mContentLength;
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PRBool mIsByteRangeRequest;
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nsInt64 mByteRangeStart;
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nsInt64 mByteRangeEnd;
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PRUint32 mPartID; // unique ID that can be used to identify
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// this part of the multipart document
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PRBool mIsLastPart;
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};
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// The nsMultiMixedConv stream converter converts a stream of type "multipart/x-mixed-replace"
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// to it's subparts. There was some debate as to whether or not the functionality desired
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// when HTTP confronted this type required a stream converter. After all, this type really
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// prompts various viewer related actions rather than stream conversion. There simply needs
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// to be a piece in place that can strip out the multiple parts of a stream of this type, and
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// "display" them accordingly.
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//
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// With that said, this "stream converter" spends more time packaging up the sub parts of the
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// main stream and sending them off the destination stream listener, than doing any real
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// stream parsing/converting.
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//
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// WARNING: This converter requires that it's destination stream listener be able to handle
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// multiple OnStartRequest(), OnDataAvailable(), and OnStopRequest() call combinations.
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// Each series represents the beginning, data production, and ending phase of each sub-
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// part of the original stream.
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//
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// NOTE: this MIME-type is used by HTTP, *not* SMTP, or IMAP.
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//
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// NOTE: For reference, a general description of how this MIME type should be handled via
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// HTTP, see http://home.netscape.com/assist/net_sites/pushpull.html . Note that
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// real world server content deviates considerably from this overview.
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//
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// Implementation assumptions:
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// Assumed structue:
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// --BoundaryToken[\r]\n
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// content-type: foo/bar[\r]\n
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// ... (other headers if any)
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// [\r]\n (second line feed to delimit end of headers)
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// data
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// --BoundaryToken-- (end delimited by final "--")
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//
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// linebreaks can be either CRLF or LFLF. linebreaks preceeding
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// boundary tokens are considered part of the data. BoundaryToken
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// is any opaque string.
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//
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//
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class nsMultiMixedConv : public nsIStreamConverter {
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public:
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NS_DECL_ISUPPORTS
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NS_DECL_NSISTREAMCONVERTER
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NS_DECL_NSISTREAMLISTENER
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NS_DECL_NSIREQUESTOBSERVER
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nsMultiMixedConv();
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virtual ~nsMultiMixedConv();
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protected:
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nsresult SendStart(nsIChannel *aChannel);
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nsresult SendStop(nsresult aStatus);
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nsresult SendData(char *aBuffer, PRUint32 aLen);
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nsresult ParseHeaders(nsIChannel *aChannel, char *&aPtr,
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PRUint32 &aLen, PRBool *_retval);
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PRInt32 PushOverLine(char *&aPtr, PRUint32 &aLen);
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char *FindToken(char *aCursor, PRUint32 aLen);
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nsresult BufferData(char *aData, PRUint32 aLen);
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// member data
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PRBool mNewPart; // Are we processing the beginning of a part?
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PRBool mProcessingHeaders;
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nsCOMPtr<nsIStreamListener> mFinalListener; // this guy gets the converted data via his OnDataAvailable()
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nsCString mToken;
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PRUint32 mTokenLen;
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nsRefPtr<nsPartChannel> mPartChannel; // the channel for the given part we're processing.
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// one channel per part.
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nsCOMPtr<nsISupports> mContext;
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nsCString mContentType;
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nsCString mContentDisposition;
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nsUint64 mContentLength;
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char *mBuffer;
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PRUint32 mBufLen;
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nsUint64 mTotalSent;
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PRBool mFirstOnData; // used to determine if we're in our first OnData callback.
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// The following members are for tracking the byte ranges in
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// multipart/mixed content which specified the 'Content-Range:'
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// header...
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nsInt64 mByteRangeStart;
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nsInt64 mByteRangeEnd;
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PRBool mIsByteRangeRequest;
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PRUint32 mCurrentPartID;
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};
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#endif /* __nsmultimixedconv__h__ */
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