netwerk/streamconv/converters/nsHTTPCompressConv.h

   1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /* ***** BEGIN LICENSE BLOCK *****
   3  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
   4  *
   5  * The contents of this file are subject to the Mozilla Public License Version
   6  * 1.1 (the "License"); you may not use this file except in compliance with
   7  * the License. You may obtain a copy of the License at
   8  * http://www.mozilla.org/MPL/
   9  *
  10  * Software distributed under the License is distributed on an "AS IS" basis,
  11  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
  12  * for the specific language governing rights and limitations under the
  13  * License.
  14  *
  15  * The Original Code is mozilla.org code.
  16  *
  17  * The Initial Developer of the Original Code is
  18  * Netscape Communications Corporation.
  19  * Portions created by the Initial Developer are Copyright (C) 1998
  20  * the Initial Developer. All Rights Reserved.
  21  *
  22  * Contributor(s):
  23  *   David Dick <ddick@cpan.org>
  24  *
  25  * Alternatively, the contents of this file may be used under the terms of
  26  * either the GNU General Public License Version 2 or later (the "GPL"), or
  27  * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
  28  * in which case the provisions of the GPL or the LGPL are applicable instead
  29  * of those above. If you wish to allow use of your version of this file only
  30  * under the terms of either the GPL or the LGPL, and not to allow others to
  31  * use your version of this file under the terms of the MPL, indicate your
  32  * decision by deleting the provisions above and replace them with the notice
  33  * and other provisions required by the GPL or the LGPL. If you do not delete
  34  * the provisions above, a recipient may use your version of this file under
  35  * the terms of any one of the MPL, the GPL or the LGPL.
  36  *
  37  * ***** END LICENSE BLOCK ***** */
  38
  39 #if !defined (__nsHTTPCompressConv__h__)
  40 #define __nsHTTPCompressConv__h__       1
  41
  42 #include "nsIStreamConverter.h"
  43 #include "nsIStringStream.h"
  44 #include "nsCOMPtr.h"
  45
  46 #include "zlib.h"
  47
  48 #define NS_HTTPCOMPRESSCONVERTER_CID                \
  49 {                                                   \
  50     /* 66230b2b-17fa-4bd3-abf4-07986151022d */      \
  51     0x66230b2b,                                     \
  52     0x17fa,                                         \
  53     0x4bd3,                                         \
  54     {0xab, 0xf4, 0x07, 0x98, 0x61, 0x51, 0x02, 0x2d}\
  55 }
  56
  57
  58 #define HTTP_DEFLATE_TYPE               "deflate"
  59 #define HTTP_GZIP_TYPE          "gzip"
  60 #define HTTP_X_GZIP_TYPE            "x-gzip"
  61 #define HTTP_COMPRESS_TYPE          "compress"
  62 #define HTTP_X_COMPRESS_TYPE    "x-compress"
  63 #define HTTP_IDENTITY_TYPE          "identity"
  64 #define HTTP_UNCOMPRESSED_TYPE  "uncompressed"
  65
  66 typedef enum    {
  67         HTTP_COMPRESS_GZIP,
  68         HTTP_COMPRESS_DEFLATE,
  69         HTTP_COMPRESS_COMPRESS,
  70         HTTP_COMPRESS_IDENTITY
  71     }   CompressMode;
  72
  73 class nsHTTPCompressConv        : public nsIStreamConverter     {
  74 public:
  75     // nsISupports methods
  76     NS_DECL_ISUPPORTS
  77
  78         NS_DECL_NSIREQUESTOBSERVER
  79     NS_DECL_NSISTREAMLISTENER
  80
  81     // nsIStreamConverter methods
  82     NS_DECL_NSISTREAMCONVERTER
  83
  84
  85     nsHTTPCompressConv ();
  86     virtual ~nsHTTPCompressConv ();
  87
  88 private:
  89
  90     nsIStreamListener   *mListener; // this guy gets the converted data via his OnDataAvailable ()
  91         CompressMode        mMode;
  92
  93     unsigned char *mOutBuffer;
  94     unsigned char *mInpBuffer;
  95
  96     PRUint32    mOutBufferLen;
  97     PRUint32    mInpBufferLen;
  98
  99     nsCOMPtr<nsISupports>   mAsyncConvContext;
 100     nsCOMPtr<nsIStringInputStream>  mStream;
 101
 102     nsresult do_OnDataAvailable (nsIRequest *request, nsISupports *aContext,
 103                                  PRUint32 aSourceOffset, const char *buffer,
 104                                  PRUint32 aCount);
 105
 106     PRBool      mCheckHeaderDone;
 107     PRBool      mStreamEnded;
 108     PRBool      mStreamInitialized;
 109     PRBool      mDummyStreamInitialised;
 110
 111     z_stream d_stream;
 112     unsigned mLen, hMode, mSkipCount, mFlags;
 113
 114     PRUint32 check_header (nsIInputStream *iStr, PRUint32 streamLen, nsresult *rv);
 115 };
 116
 117
 118 #endif