mirror of
https://github.com/rn10950/RetroZilla.git
synced 2024-11-09 09:20:15 +01:00
563 lines
18 KiB
C++
563 lines
18 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* vim:set ts=4 sw=4 sts=4 cindent et: */
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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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* David Dick <ddick@cpan.org>
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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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#include "nsHTTPCompressConv.h"
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#include "nsMemory.h"
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#include "plstr.h"
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#include "prlog.h"
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#include "nsIChannel.h"
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#include "nsCOMPtr.h"
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#include "nsReadableUtils.h"
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#include "nsIByteArrayInputStream.h"
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#include "nsIStringStream.h"
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static NS_METHOD
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DiscardSegments(nsIInputStream *input,
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void *closure,
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const char *buf,
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PRUint32 offset,
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PRUint32 count,
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PRUint32 *countRead)
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{
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*countRead = count;
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return NS_OK;
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}
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// nsISupports implementation
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NS_IMPL_THREADSAFE_ISUPPORTS2(nsHTTPCompressConv, nsIStreamConverter, nsIStreamListener)
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// nsFTPDirListingConv methods
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nsHTTPCompressConv::nsHTTPCompressConv()
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: mListener(nsnull)
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, mMode(HTTP_COMPRESS_IDENTITY)
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, mOutBuffer(NULL)
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, mInpBuffer(NULL)
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, mOutBufferLen(0)
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, mInpBufferLen(0)
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, mCheckHeaderDone(PR_FALSE)
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, mStreamEnded(PR_FALSE)
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, mStreamInitialized(PR_FALSE)
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, mLen(0)
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, hMode(0)
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, mSkipCount(0)
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, mFlags(0)
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{
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}
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nsHTTPCompressConv::~nsHTTPCompressConv()
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{
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NS_IF_RELEASE(mListener);
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if (mInpBuffer)
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nsMemory::Free(mInpBuffer);
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if (mOutBuffer)
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nsMemory::Free(mOutBuffer);
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// For some reason we are not getting Z_STREAM_END. But this was also seen
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// for mozilla bug 198133. Need to handle this case.
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if ((mStreamInitialized == PR_TRUE) && (mStreamEnded == PR_FALSE))
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inflateEnd (&d_stream);
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}
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NS_IMETHODIMP
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nsHTTPCompressConv::AsyncConvertData(const char *aFromType,
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const char *aToType,
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nsIStreamListener *aListener,
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nsISupports *aCtxt)
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{
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if (!PL_strncasecmp(aFromType, HTTP_COMPRESS_TYPE, sizeof(HTTP_COMPRESS_TYPE)-1) ||
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!PL_strncasecmp(aFromType, HTTP_X_COMPRESS_TYPE, sizeof(HTTP_X_COMPRESS_TYPE)-1))
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mMode = HTTP_COMPRESS_COMPRESS;
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else if (!PL_strncasecmp(aFromType, HTTP_GZIP_TYPE, sizeof(HTTP_GZIP_TYPE)-1) ||
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!PL_strncasecmp(aFromType, HTTP_X_GZIP_TYPE, sizeof(HTTP_X_GZIP_TYPE)-1))
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mMode = HTTP_COMPRESS_GZIP;
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else if (!PL_strncasecmp(aFromType, HTTP_DEFLATE_TYPE, sizeof(HTTP_DEFLATE_TYPE)-1))
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mMode = HTTP_COMPRESS_DEFLATE;
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// hook ourself up with the receiving listener.
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mListener = aListener;
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NS_ADDREF(mListener);
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mAsyncConvContext = aCtxt;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsHTTPCompressConv::OnStartRequest(nsIRequest* request, nsISupports *aContext)
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{
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return mListener->OnStartRequest(request, aContext);
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}
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NS_IMETHODIMP
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nsHTTPCompressConv::OnStopRequest(nsIRequest* request, nsISupports *aContext,
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nsresult aStatus)
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{
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return mListener->OnStopRequest(request, aContext, aStatus);
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}
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NS_IMETHODIMP
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nsHTTPCompressConv::OnDataAvailable(nsIRequest* request,
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nsISupports *aContext,
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nsIInputStream *iStr,
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PRUint32 aSourceOffset,
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PRUint32 aCount)
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{
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nsresult rv = NS_ERROR_FAILURE;
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PRUint32 streamLen = aCount;
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if (streamLen == 0)
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{
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NS_ERROR("count of zero passed to OnDataAvailable");
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return NS_ERROR_UNEXPECTED;
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}
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if (mStreamEnded)
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{
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// Hmm... this may just indicate that the data stream is done and that
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// what's left is either metadata or padding of some sort.... throwing
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// it out is probably the safe thing to do.
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PRUint32 n;
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return iStr->ReadSegments(DiscardSegments, nsnull, streamLen, &n);
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}
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switch (mMode)
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{
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case HTTP_COMPRESS_GZIP:
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streamLen = check_header(iStr, streamLen, &rv);
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if (rv != NS_OK)
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return rv;
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if (streamLen == 0)
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return NS_OK;
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case HTTP_COMPRESS_DEFLATE:
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if (mInpBuffer != NULL && streamLen > mInpBufferLen)
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{
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mInpBuffer = (unsigned char *) nsMemory::Realloc(mInpBuffer, mInpBufferLen = streamLen);
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if (mOutBufferLen < streamLen * 2)
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mOutBuffer = (unsigned char *) nsMemory::Realloc(mOutBuffer, mOutBufferLen = streamLen * 3);
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if (mInpBuffer == NULL || mOutBuffer == NULL)
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return NS_ERROR_OUT_OF_MEMORY;
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}
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if (mInpBuffer == NULL)
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mInpBuffer = (unsigned char *) nsMemory::Alloc(mInpBufferLen = streamLen);
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if (mOutBuffer == NULL)
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mOutBuffer = (unsigned char *) nsMemory::Alloc(mOutBufferLen = streamLen * 3);
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if (mInpBuffer == NULL || mOutBuffer == NULL)
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return NS_ERROR_OUT_OF_MEMORY;
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iStr->Read((char *)mInpBuffer, streamLen, &rv);
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if (NS_FAILED(rv))
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return rv;
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if (mMode == HTTP_COMPRESS_DEFLATE)
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{
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if (!mStreamInitialized)
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{
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memset(&d_stream, 0, sizeof (d_stream));
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if (inflateInit(&d_stream) != Z_OK)
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return NS_ERROR_FAILURE;
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mStreamInitialized = PR_TRUE;
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}
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d_stream.next_in = mInpBuffer;
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d_stream.avail_in = (uInt)streamLen;
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mDummyStreamInitialised = PR_FALSE;
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for (;;)
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{
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d_stream.next_out = mOutBuffer;
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d_stream.avail_out = (uInt)mOutBufferLen;
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int code = inflate(&d_stream, Z_NO_FLUSH);
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unsigned bytesWritten = (uInt)mOutBufferLen - d_stream.avail_out;
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if (code == Z_STREAM_END)
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{
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if (bytesWritten)
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{
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rv = do_OnDataAvailable(request, aContext, aSourceOffset, (char *)mOutBuffer, bytesWritten);
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if (NS_FAILED (rv))
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return rv;
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}
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inflateEnd(&d_stream);
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mStreamEnded = PR_TRUE;
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break;
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}
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else if (code == Z_OK)
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{
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if (bytesWritten)
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{
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rv = do_OnDataAvailable(request, aContext, aSourceOffset, (char *)mOutBuffer, bytesWritten);
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if (NS_FAILED (rv))
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return rv;
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}
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}
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else if (code == Z_BUF_ERROR)
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{
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if (bytesWritten)
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{
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rv = do_OnDataAvailable(request, aContext, aSourceOffset, (char *)mOutBuffer, bytesWritten);
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if (NS_FAILED (rv))
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return rv;
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}
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break;
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}
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else if (code == Z_DATA_ERROR)
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{
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// some servers (notably Apache with mod_deflate) don't generate zlib headers
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// insert a dummy header and try again
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static char dummy_head[2] =
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{
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0x8 + 0x7 * 0x10,
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(((0x8 + 0x7 * 0x10) * 0x100 + 30) / 31 * 31) & 0xFF,
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};
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inflateReset(&d_stream);
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d_stream.next_in = (Bytef*) dummy_head;
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d_stream.avail_in = sizeof(dummy_head);
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code = inflate(&d_stream, Z_NO_FLUSH);
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if (code != Z_OK)
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return NS_ERROR_FAILURE;
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// stop an endless loop caused by non-deflate data being labelled as deflate
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if (mDummyStreamInitialised) {
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NS_ERROR("endless loop detected");
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return NS_ERROR_FAILURE;
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}
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mDummyStreamInitialised = PR_TRUE;
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// reset stream pointers to our original data
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d_stream.next_in = mInpBuffer;
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d_stream.avail_in = (uInt)streamLen;
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}
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else
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return NS_ERROR_FAILURE;
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} /* for */
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}
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else
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{
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if (!mStreamInitialized)
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{
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memset(&d_stream, 0, sizeof (d_stream));
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if (inflateInit2(&d_stream, -MAX_WBITS) != Z_OK)
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return NS_ERROR_FAILURE;
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mStreamInitialized = PR_TRUE;
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}
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d_stream.next_in = mInpBuffer;
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d_stream.avail_in = (uInt)streamLen;
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for (;;)
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{
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d_stream.next_out = mOutBuffer;
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d_stream.avail_out = (uInt)mOutBufferLen;
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int code = inflate (&d_stream, Z_NO_FLUSH);
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unsigned bytesWritten = (uInt)mOutBufferLen - d_stream.avail_out;
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if (code == Z_STREAM_END)
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{
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if (bytesWritten)
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{
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rv = do_OnDataAvailable(request, aContext, aSourceOffset, (char *)mOutBuffer, bytesWritten);
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if (NS_FAILED (rv))
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return rv;
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}
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inflateEnd(&d_stream);
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mStreamEnded = PR_TRUE;
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break;
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}
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else if (code == Z_OK)
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{
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if (bytesWritten)
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{
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rv = do_OnDataAvailable(request, aContext, aSourceOffset, (char *)mOutBuffer, bytesWritten);
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if (NS_FAILED (rv))
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return rv;
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}
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}
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else if (code == Z_BUF_ERROR)
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{
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if (bytesWritten)
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{
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rv = do_OnDataAvailable(request, aContext, aSourceOffset, (char *)mOutBuffer, bytesWritten);
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if (NS_FAILED (rv))
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return rv;
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}
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break;
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}
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else
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return NS_ERROR_FAILURE;
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} /* for */
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} /* gzip */
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break;
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default:
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rv = mListener->OnDataAvailable(request, aContext, iStr, aSourceOffset, aCount);
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if (NS_FAILED (rv))
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return rv;
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} /* switch */
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return NS_OK;
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} /* OnDataAvailable */
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// XXX/ruslan: need to implement this too
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NS_IMETHODIMP
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nsHTTPCompressConv::Convert(nsIInputStream *aFromStream,
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const char *aFromType,
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const char *aToType,
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nsISupports *aCtxt,
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nsIInputStream **_retval)
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{
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return NS_ERROR_NOT_IMPLEMENTED;
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}
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nsresult
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nsHTTPCompressConv::do_OnDataAvailable(nsIRequest* request, nsISupports *aContext, PRUint32 aSourceOffset, char *buffer, PRUint32 aCount)
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{
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nsresult rv;
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nsCOMPtr<nsIByteArrayInputStream> convertedStreamSup;
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char *lBuf = (char *) nsMemory::Alloc (aCount);
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if (lBuf == NULL)
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return NS_ERROR_OUT_OF_MEMORY;
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memcpy(lBuf, buffer, aCount);
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rv = NS_NewByteArrayInputStream(getter_AddRefs(convertedStreamSup), lBuf, aCount);
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if (NS_FAILED(rv))
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return rv;
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nsCOMPtr<nsIInputStream> convertedStream = do_QueryInterface(convertedStreamSup, &rv);
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if (NS_FAILED(rv))
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return rv;
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return mListener->OnDataAvailable(request, aContext, convertedStream, aSourceOffset, aCount);
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}
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#define ASCII_FLAG 0x01 /* bit 0 set: file probably ascii text */
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#define HEAD_CRC 0x02 /* bit 1 set: header CRC present */
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#define EXTRA_FIELD 0x04 /* bit 2 set: extra field present */
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#define ORIG_NAME 0x08 /* bit 3 set: original file name present */
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#define COMMENT 0x10 /* bit 4 set: file comment present */
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#define RESERVED 0xE0 /* bits 5..7: reserved */
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static unsigned gz_magic[2] = {0x1f, 0x8b}; /* gzip magic header */
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PRUint32
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nsHTTPCompressConv::check_header(nsIInputStream *iStr, PRUint32 streamLen, nsresult *rs)
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{
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nsresult rv;
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enum { GZIP_INIT = 0, GZIP_OS, GZIP_EXTRA0, GZIP_EXTRA1, GZIP_EXTRA2, GZIP_ORIG, GZIP_COMMENT, GZIP_CRC };
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char c;
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*rs = NS_OK;
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if (mCheckHeaderDone)
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return streamLen;
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while (streamLen)
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{
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switch (hMode)
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{
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case GZIP_INIT:
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iStr->Read (&c, 1, &rv);
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streamLen--;
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if (mSkipCount == 0 && ((unsigned)c & 0377) != gz_magic[0])
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{
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*rs = NS_ERROR_FAILURE;
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return 0;
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}
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if (mSkipCount == 1 && ((unsigned)c & 0377) != gz_magic[1])
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{
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*rs = NS_ERROR_FAILURE;
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return 0;
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}
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if (mSkipCount == 2 && ((unsigned)c & 0377) != Z_DEFLATED)
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{
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*rs = NS_ERROR_FAILURE;
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return 0;
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}
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mSkipCount++;
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if (mSkipCount == 4)
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{
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mFlags = (unsigned) c & 0377;
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if (mFlags & RESERVED)
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{
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*rs = NS_ERROR_FAILURE;
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return 0;
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}
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hMode = GZIP_OS;
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mSkipCount = 0;
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}
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break;
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case GZIP_OS:
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iStr->Read(&c, 1, &rv);
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streamLen--;
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mSkipCount++;
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if (mSkipCount == 6)
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hMode = GZIP_EXTRA0;
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break;
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case GZIP_EXTRA0:
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if (mFlags & EXTRA_FIELD)
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{
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iStr->Read(&c, 1, &rv);
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streamLen--;
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mLen = (uInt) c & 0377;
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hMode = GZIP_EXTRA1;
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}
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else
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hMode = GZIP_ORIG;
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break;
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case GZIP_EXTRA1:
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iStr->Read(&c, 1, &rv);
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streamLen--;
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mLen = ((uInt) c & 0377) << 8;
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mSkipCount = 0;
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hMode = GZIP_EXTRA2;
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break;
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case GZIP_EXTRA2:
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if (mSkipCount == mLen)
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hMode = GZIP_ORIG;
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else
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{
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iStr->Read(&c, 1, &rv);
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streamLen--;
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mSkipCount++;
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}
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break;
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case GZIP_ORIG:
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if (mFlags & ORIG_NAME)
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{
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iStr->Read(&c, 1, &rv);
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streamLen--;
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if (c == 0)
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hMode = GZIP_COMMENT;
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}
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else
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hMode = GZIP_COMMENT;
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break;
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case GZIP_COMMENT:
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if (mFlags & GZIP_COMMENT)
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{
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iStr->Read(&c, 1, &rv);
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streamLen--;
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if (c == 0)
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{
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hMode = GZIP_CRC;
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mSkipCount = 0;
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}
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}
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else
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{
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hMode = GZIP_CRC;
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mSkipCount = 0;
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}
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break;
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case GZIP_CRC:
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if (mFlags & HEAD_CRC)
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{
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iStr->Read(&c, 1, &rv);
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streamLen--;
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mSkipCount++;
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if (mSkipCount == 2)
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{
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mCheckHeaderDone = PR_TRUE;
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return streamLen;
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|
}
|
|
}
|
|
else
|
|
{
|
|
mCheckHeaderDone = PR_TRUE;
|
|
return streamLen;
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
return streamLen;
|
|
}
|
|
|
|
nsresult
|
|
NS_NewHTTPCompressConv(nsHTTPCompressConv **aHTTPCompressConv)
|
|
{
|
|
NS_PRECONDITION(aHTTPCompressConv != nsnull, "null ptr");
|
|
|
|
if (!aHTTPCompressConv)
|
|
return NS_ERROR_NULL_POINTER;
|
|
|
|
*aHTTPCompressConv = new nsHTTPCompressConv();
|
|
|
|
if (!*aHTTPCompressConv)
|
|
return NS_ERROR_OUT_OF_MEMORY;
|
|
|
|
NS_ADDREF(*aHTTPCompressConv);
|
|
return NS_OK;
|
|
}
|