Line data    Source code

       1             : /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
       2             : /* vim: set sw=2 ts=8 et tw=80 : */
       3             : /* This Source Code Form is subject to the terms of the Mozilla Public
       4             :  * License, v. 2.0. If a copy of the MPL was not distributed with this
       5             :  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
       6             : 
       7             : #if !defined (__nsHTTPCompressConv__h__)
       8             : #define __nsHTTPCompressConv__h__       1
       9             : 
      10             : #include "nsIStreamConverter.h"
      11             : #include "nsICompressConvStats.h"
      12             : #include "nsIThreadRetargetableStreamListener.h"
      13             : #include "nsCOMPtr.h"
      14             : #include "nsAutoPtr.h"
      15             : #include "mozilla/Atomics.h"
      16             : #include "mozilla/Mutex.h"
      17             : 
      18             : #include "zlib.h"
      19             : 
      20             : // brotli includes
      21             : #undef assert
      22             : #include "assert.h"
      23             : #include "state.h"
      24             : 
      25             : class nsIStringInputStream;
      26             : 
      27             : #define NS_HTTPCOMPRESSCONVERTER_CID                    \
      28             :   {                                                     \
      29             :     /* 66230b2b-17fa-4bd3-abf4-07986151022d */          \
      30             :     0x66230b2b,                                         \
      31             :       0x17fa,                                           \
      32             :       0x4bd3,                                           \
      33             :       {0xab, 0xf4, 0x07, 0x98, 0x61, 0x51, 0x02, 0x2d}  \
      34             :   }
      35             : 
      36             : 
      37             : #define HTTP_DEFLATE_TYPE               "deflate"
      38             : #define HTTP_GZIP_TYPE          "gzip"
      39             : #define HTTP_X_GZIP_TYPE            "x-gzip"
      40             : #define HTTP_COMPRESS_TYPE          "compress"
      41             : #define HTTP_X_COMPRESS_TYPE    "x-compress"
      42             : #define HTTP_BROTLI_TYPE        "br"
      43             : #define HTTP_IDENTITY_TYPE          "identity"
      44             : #define HTTP_UNCOMPRESSED_TYPE  "uncompressed"
      45             : 
      46             : namespace mozilla {
      47             : namespace net {
      48             : 
      49             : typedef enum    {
      50             :   HTTP_COMPRESS_GZIP,
      51             :   HTTP_COMPRESS_DEFLATE,
      52             :   HTTP_COMPRESS_COMPRESS,
      53             :   HTTP_COMPRESS_BROTLI,
      54             :   HTTP_COMPRESS_IDENTITY
      55             : } CompressMode;
      56             : 
      57             : class BrotliWrapper
      58             : {
      59             : public:
      60           0 :   BrotliWrapper()
      61           0 :     : mTotalOut(0)
      62             :     , mStatus(NS_OK)
      63           0 :     , mBrotliStateIsStreamEnd(false)
      64             :   {
      65           0 :     BrotliStateInit(&mState);
      66           0 :   }
      67           0 :   ~BrotliWrapper()
      68           0 :   {
      69           0 :     BrotliStateCleanup(&mState);
      70           0 :   }
      71             : 
      72             :   BrotliState             mState;
      73             :   Atomic<size_t, Relaxed> mTotalOut;
      74             :   nsresult                mStatus;
      75             :   Atomic<bool, Relaxed>   mBrotliStateIsStreamEnd;
      76             : 
      77             :   nsIRequest  *mRequest;
      78             :   nsISupports *mContext;
      79             :   uint64_t     mSourceOffset;
      80             : };
      81             : 
      82             : class nsHTTPCompressConv
      83             :   : public nsIStreamConverter
      84             :   , public nsICompressConvStats
      85             :   , public nsIThreadRetargetableStreamListener
      86             : {
      87             :   public:
      88             :   // nsISupports methods
      89             :     NS_DECL_THREADSAFE_ISUPPORTS
      90             :     NS_DECL_NSIREQUESTOBSERVER
      91             :     NS_DECL_NSISTREAMLISTENER
      92             :     NS_DECL_NSICOMPRESSCONVSTATS
      93             :     NS_DECL_NSITHREADRETARGETABLESTREAMLISTENER
      94             : 
      95             :   // nsIStreamConverter methods
      96             :     NS_DECL_NSISTREAMCONVERTER
      97             : 
      98             :     nsHTTPCompressConv ();
      99             : 
     100             : private:
     101             :     virtual ~nsHTTPCompressConv ();
     102             : 
     103             :     nsCOMPtr<nsIStreamListener> mListener; // this guy gets the converted data via his OnDataAvailable ()
     104             :     Atomic<CompressMode, Relaxed> mMode;
     105             : 
     106             :     unsigned char *mOutBuffer;
     107             :     unsigned char *mInpBuffer;
     108             : 
     109             :     uint32_t    mOutBufferLen;
     110             :     uint32_t    mInpBufferLen;
     111             : 
     112             :     nsAutoPtr<BrotliWrapper> mBrotli;
     113             : 
     114             :     nsCOMPtr<nsIStringInputStream>  mStream;
     115             : 
     116             :     static nsresult
     117             :     BrotliHandler(nsIInputStream *stream, void *closure, const char *dataIn,
     118             :                   uint32_t, uint32_t avail, uint32_t *countRead);
     119             : 
     120             :     nsresult do_OnDataAvailable (nsIRequest *request, nsISupports *aContext,
     121             :                                  uint64_t aSourceOffset, const char *buffer,
     122             :                                  uint32_t aCount);
     123             : 
     124             :     bool         mCheckHeaderDone;
     125             :     Atomic<bool> mStreamEnded;
     126             :     bool         mStreamInitialized;
     127             :     bool         mDummyStreamInitialised;
     128             :     bool         mFailUncleanStops;
     129             : 
     130             :     z_stream d_stream;
     131             :     unsigned mLen, hMode, mSkipCount, mFlags;
     132             : 
     133             :     uint32_t check_header (nsIInputStream *iStr, uint32_t streamLen, nsresult *rv);
     134             : 
     135             :     Atomic<uint32_t, Relaxed> mDecodedDataLength;
     136             : 
     137             :     mutable mozilla::Mutex mMutex;
     138             : };
     139             : 
     140             : } // namespace net
     141             : } // namespace mozilla
     142             : 
     143             : #endif