The Tor Browser: netwerk/streamconv/converters/nsMultiMixedConv.cpp@a63d609f5ebe (annotated)

netwerk/streamconv/converters/nsMultiMixedConv.cpp@a63d609f5ebe (annotated)

netwerk/streamconv/converters/nsMultiMixedConv.cpp

Thu, 15 Jan 2015 15:55:04 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 15 Jan 2015 15:55:04 +0100
branch: TOR_BUG_9701
changeset 9: a63d609f5ebe
permissions: -rw-r--r--

Back out 97036ab72558 which inappropriately compared turds to third parties.

 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
 /* This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
 #include "nsMultiMixedConv.h"
 #include "plstr.h"
 #include "nsIHttpChannel.h"
 #include "nsNetUtil.h"
 #include "nsMimeTypes.h"
 #include "nsIStringStream.h"
 #include "nsCRT.h"
 #include "nsIHttpChannelInternal.h"
 #include "nsURLHelper.h"
 #include "nsIStreamConverterService.h"
 #include <algorithm>
 //
 // Helper function for determining the length of data bytes up to
 // the next multipart token.  A token is usually preceded by a LF
 // or CRLF delimiter.
 //
 static uint32_t
 LengthToToken(const char *cursor, const char *token)
 {
     uint32_t len = token - cursor;
     // Trim off any LF or CRLF preceding the token
     if (len && *(token-1) == '\n') {
         --len;
         if (len && *(token-2) == '\r')
             --len;
     }
     return len;
 }
 nsPartChannel::nsPartChannel(nsIChannel *aMultipartChannel, uint32_t aPartID,
                              nsIStreamListener* aListener) :
   mMultipartChannel(aMultipartChannel),
   mListener(aListener),
   mStatus(NS_OK),
   mContentLength(UINT64_MAX),
   mIsByteRangeRequest(false),
   mByteRangeStart(0),
   mByteRangeEnd(0),
   mPartID(aPartID),
   mIsLastPart(false)
 {
     mMultipartChannel = aMultipartChannel;
     // Inherit the load flags from the original channel...
     mMultipartChannel->GetLoadFlags(&mLoadFlags);
     mMultipartChannel->GetLoadGroup(getter_AddRefs(mLoadGroup));
 }
 nsPartChannel::~nsPartChannel()
 {
 }
 void nsPartChannel::InitializeByteRange(int64_t aStart, int64_t aEnd)
 {
     mIsByteRangeRequest = true;
     mByteRangeStart = aStart;
     mByteRangeEnd   = aEnd;
 }
 nsresult nsPartChannel::SendOnStartRequest(nsISupports* aContext)
 {
     return mListener->OnStartRequest(this, aContext);
 }
 nsresult nsPartChannel::SendOnDataAvailable(nsISupports* aContext,
                                             nsIInputStream* aStream,
                                             uint64_t aOffset, uint32_t aLen)
 {
     return mListener->OnDataAvailable(this, aContext, aStream, aOffset, aLen);
 }
 nsresult nsPartChannel::SendOnStopRequest(nsISupports* aContext,
                                           nsresult aStatus)
 {
     // Drop the listener
     nsCOMPtr<nsIStreamListener> listener;
     listener.swap(mListener);
     return listener->OnStopRequest(this, aContext, aStatus);
 }
 void nsPartChannel::SetContentDisposition(const nsACString& aContentDispositionHeader)
 {
     mContentDispositionHeader = aContentDispositionHeader;
     nsCOMPtr<nsIURI> uri;
     GetURI(getter_AddRefs(uri));
     NS_GetFilenameFromDisposition(mContentDispositionFilename,
                                   mContentDispositionHeader, uri);
     mContentDisposition = NS_GetContentDispositionFromHeader(mContentDispositionHeader, this);
 }
 //
 // nsISupports implementation...
 //
 NS_IMPL_ADDREF(nsPartChannel)
 NS_IMPL_RELEASE(nsPartChannel)
 NS_INTERFACE_MAP_BEGIN(nsPartChannel)
     NS_INTERFACE_MAP_ENTRY_AMBIGUOUS(nsISupports, nsIChannel)
     NS_INTERFACE_MAP_ENTRY(nsIRequest)
     NS_INTERFACE_MAP_ENTRY(nsIChannel)
     NS_INTERFACE_MAP_ENTRY(nsIByteRangeRequest)
     NS_INTERFACE_MAP_ENTRY(nsIMultiPartChannel)
 NS_INTERFACE_MAP_END
 //
 // nsIRequest implementation...
 //
 NS_IMETHODIMP
 nsPartChannel::GetName(nsACString &aResult)
 {
     return mMultipartChannel->GetName(aResult);
 }
 NS_IMETHODIMP
 nsPartChannel::IsPending(bool *aResult)
 {
     // For now, consider the active lifetime of each part the same as
     // the underlying multipart channel...  This is not exactly right,
     // but it is good enough :-)
     return mMultipartChannel->IsPending(aResult);
 }
 NS_IMETHODIMP
 nsPartChannel::GetStatus(nsresult *aResult)
 {
     nsresult rv = NS_OK;
     if (NS_FAILED(mStatus)) {
         *aResult = mStatus;
     } else {
         rv = mMultipartChannel->GetStatus(aResult);
     }
     return rv;
 }
 NS_IMETHODIMP
 nsPartChannel::Cancel(nsresult aStatus)
 {
     // Cancelling an individual part must not cancel the underlying
     // multipart channel...
     // XXX but we should stop sending data for _this_ part channel!
     mStatus = aStatus;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsPartChannel::Suspend(void)
 {
     // Suspending an individual part must not suspend the underlying
     // multipart channel...
     // XXX why not?
     return NS_OK;
 }
 NS_IMETHODIMP
 nsPartChannel::Resume(void)
 {
     // Resuming an individual part must not resume the underlying
     // multipart channel...
     // XXX why not?
     return NS_OK;
 }
 //
 // nsIChannel implementation
 //
 NS_IMETHODIMP
 nsPartChannel::GetOriginalURI(nsIURI * *aURI)
 {
     return mMultipartChannel->GetOriginalURI(aURI);
 }
 NS_IMETHODIMP
 nsPartChannel::SetOriginalURI(nsIURI *aURI)
 {
     return mMultipartChannel->SetOriginalURI(aURI);
 }
 NS_IMETHODIMP
 nsPartChannel::GetURI(nsIURI * *aURI)
 {
     return mMultipartChannel->GetURI(aURI);
 }
 NS_IMETHODIMP
 nsPartChannel::Open(nsIInputStream **result)
 {
     // This channel cannot be opened!
     return NS_ERROR_FAILURE;
 }
 NS_IMETHODIMP
 nsPartChannel::AsyncOpen(nsIStreamListener *aListener, nsISupports *aContext)
 {
     // This channel cannot be opened!
     return NS_ERROR_FAILURE;
 }
 NS_IMETHODIMP
 nsPartChannel::GetLoadFlags(nsLoadFlags *aLoadFlags)
 {
     *aLoadFlags = mLoadFlags;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsPartChannel::SetLoadFlags(nsLoadFlags aLoadFlags)
 {
     mLoadFlags = aLoadFlags;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsPartChannel::GetLoadGroup(nsILoadGroup* *aLoadGroup)
 {
     *aLoadGroup = mLoadGroup;
     NS_IF_ADDREF(*aLoadGroup);
     return NS_OK;
 }
 NS_IMETHODIMP
 nsPartChannel::SetLoadGroup(nsILoadGroup* aLoadGroup)
 {
     mLoadGroup = aLoadGroup;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsPartChannel::GetOwner(nsISupports* *aOwner)
 {
     return mMultipartChannel->GetOwner(aOwner);
 }
 NS_IMETHODIMP
 nsPartChannel::SetOwner(nsISupports* aOwner)
 {
     return mMultipartChannel->SetOwner(aOwner);
 }
 NS_IMETHODIMP
 nsPartChannel::GetNotificationCallbacks(nsIInterfaceRequestor* *aCallbacks)
 {
     return mMultipartChannel->GetNotificationCallbacks(aCallbacks);
 }
 NS_IMETHODIMP
 nsPartChannel::SetNotificationCallbacks(nsIInterfaceRequestor* aCallbacks)
 {
     return mMultipartChannel->SetNotificationCallbacks(aCallbacks);
 }
 NS_IMETHODIMP
 nsPartChannel::GetSecurityInfo(nsISupports * *aSecurityInfo)
 {
     return mMultipartChannel->GetSecurityInfo(aSecurityInfo);
 }
 NS_IMETHODIMP
 nsPartChannel::GetContentType(nsACString &aContentType)
 {
     aContentType = mContentType;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsPartChannel::SetContentType(const nsACString &aContentType)
 {
     bool dummy;
     net_ParseContentType(aContentType, mContentType, mContentCharset, &dummy);
     return NS_OK;
 }
 NS_IMETHODIMP
 nsPartChannel::GetContentCharset(nsACString &aContentCharset)
 {
     aContentCharset = mContentCharset;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsPartChannel::SetContentCharset(const nsACString &aContentCharset)
 {
     mContentCharset = aContentCharset;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsPartChannel::GetContentLength(int64_t *aContentLength)
 {
     *aContentLength = mContentLength;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsPartChannel::SetContentLength(int64_t aContentLength)
 {
     mContentLength = aContentLength;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsPartChannel::GetContentDisposition(uint32_t *aContentDisposition)
 {
     if (mContentDispositionHeader.IsEmpty())
         return NS_ERROR_NOT_AVAILABLE;
     *aContentDisposition = mContentDisposition;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsPartChannel::SetContentDisposition(uint32_t aContentDisposition)
 {
     return NS_ERROR_NOT_AVAILABLE;
 }
 NS_IMETHODIMP
 nsPartChannel::GetContentDispositionFilename(nsAString &aContentDispositionFilename)
 {
     if (mContentDispositionFilename.IsEmpty())
         return NS_ERROR_NOT_AVAILABLE;
     aContentDispositionFilename = mContentDispositionFilename;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsPartChannel::SetContentDispositionFilename(const nsAString &aContentDispositionFilename)
 {
     return NS_ERROR_NOT_AVAILABLE;
 }
 NS_IMETHODIMP
 nsPartChannel::GetContentDispositionHeader(nsACString &aContentDispositionHeader)
 {
     if (mContentDispositionHeader.IsEmpty())
         return NS_ERROR_NOT_AVAILABLE;
     aContentDispositionHeader = mContentDispositionHeader;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsPartChannel::GetPartID(uint32_t *aPartID)
 {
     *aPartID = mPartID;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsPartChannel::GetIsLastPart(bool *aIsLastPart)
 {
     *aIsLastPart = mIsLastPart;
     return NS_OK;
 }
 //
 // nsIByteRangeRequest implementation...
 //
 NS_IMETHODIMP
 nsPartChannel::GetIsByteRangeRequest(bool *aIsByteRangeRequest)
 {
     *aIsByteRangeRequest = mIsByteRangeRequest;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsPartChannel::GetStartRange(int64_t *aStartRange)
 {
     *aStartRange = mByteRangeStart;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsPartChannel::GetEndRange(int64_t *aEndRange)
 {
     *aEndRange = mByteRangeEnd;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsPartChannel::GetBaseChannel(nsIChannel ** aReturn)
 {
     NS_ENSURE_ARG_POINTER(aReturn);
     *aReturn = mMultipartChannel;
     NS_IF_ADDREF(*aReturn);
     return NS_OK;
 }
 // nsISupports implementation
 NS_IMPL_ISUPPORTS(nsMultiMixedConv,
                   nsIStreamConverter,
                   nsIStreamListener,
                   nsIRequestObserver)
 // nsIStreamConverter implementation
 // No syncronous conversion at this time.
 NS_IMETHODIMP
 nsMultiMixedConv::Convert(nsIInputStream *aFromStream,
                           const char *aFromType,
                           const char *aToType,
                           nsISupports *aCtxt, nsIInputStream **_retval) {
     return NS_ERROR_NOT_IMPLEMENTED;
 }
 // Stream converter service calls this to initialize the actual stream converter (us).
 NS_IMETHODIMP
 nsMultiMixedConv::AsyncConvertData(const char *aFromType, const char *aToType,
                                    nsIStreamListener *aListener, nsISupports *aCtxt) {
     NS_ASSERTION(aListener && aFromType && aToType, "null pointer passed into multi mixed converter");
     // hook up our final listener. this guy gets the various On*() calls we want to throw
     // at him.
     //
     // WARNING: this listener must be able to handle multiple OnStartRequest, OnDataAvail()
     //  and OnStopRequest() call combinations. We call of series of these for each sub-part
     //  in the raw stream.
     mFinalListener = aListener;
     return NS_OK;
 }
 // AutoFree implementation to prevent memory leaks
 class AutoFree
 {
 public:
   AutoFree() : mBuffer(nullptr) {}
   AutoFree(char *buffer) : mBuffer(buffer) {}
   ~AutoFree() {
     free(mBuffer);
   }
   AutoFree& operator=(char *buffer) {
     mBuffer = buffer;
     return *this;
   }
   operator char*() const {
     return mBuffer;
   }
 private:
   char *mBuffer;
 };
 // nsIStreamListener implementation
 NS_IMETHODIMP
 nsMultiMixedConv::OnDataAvailable(nsIRequest *request, nsISupports *context,
                                   nsIInputStream *inStr, uint64_t sourceOffset,
                                   uint32_t count) {
     if (mToken.IsEmpty()) // no token, no love.
         return NS_ERROR_FAILURE;
     nsresult rv = NS_OK;
     AutoFree buffer = nullptr;
     uint32_t bufLen = 0, read = 0;
     NS_ASSERTION(request, "multimixed converter needs a request");
     nsCOMPtr<nsIChannel> channel = do_QueryInterface(request, &rv);
     if (NS_FAILED(rv)) return rv;
     // fill buffer
     {
         bufLen = count + mBufLen;
         NS_ENSURE_TRUE((bufLen >= count) && (bufLen >= mBufLen),
                        NS_ERROR_FAILURE);
         buffer = (char *) malloc(bufLen);
         if (!buffer)
             return NS_ERROR_OUT_OF_MEMORY;
         if (mBufLen) {
             // incorporate any buffered data into the parsing
             memcpy(buffer, mBuffer, mBufLen);
             free(mBuffer);
             mBuffer = 0;
             mBufLen = 0;
         }
         rv = inStr->Read(buffer + (bufLen - count), count, &read);
         if (NS_FAILED(rv) || read == 0) return rv;
         NS_ASSERTION(read == count, "poor data size assumption");
     }
     char *cursor = buffer;
     if (mFirstOnData) {
         // this is the first OnData() for this request. some servers
         // don't bother sending a token in the first "part." This is
         // illegal, but we'll handle the case anyway by shoving the
         // boundary token in for the server.
         mFirstOnData = false;
         NS_ASSERTION(!mBufLen, "this is our first time through, we can't have buffered data");
         const char * token = mToken.get();
         PushOverLine(cursor, bufLen);
         if (bufLen < mTokenLen+2) {
             // we don't have enough data yet to make this comparison.
             // skip this check, and try again the next time OnData()
             // is called.
             mFirstOnData = true;
         }
         else if (!PL_strnstr(cursor, token, mTokenLen+2)) {
             buffer = (char *) realloc(buffer, bufLen + mTokenLen + 1);
             if (!buffer)
                 return NS_ERROR_OUT_OF_MEMORY;
             memmove(buffer + mTokenLen + 1, buffer, bufLen);
             memcpy(buffer, token, mTokenLen);
             buffer[mTokenLen] = '\n';
             bufLen += (mTokenLen + 1);
             // need to reset cursor to the buffer again (bug 100595)
             cursor = buffer;
         }
     }
     char *token = nullptr;
     if (mProcessingHeaders) {
         // we were not able to process all the headers
         // for this "part" given the previous buffer given to
         // us in the previous OnDataAvailable callback.
         bool done = false;
         rv = ParseHeaders(channel, cursor, bufLen, &done);
         if (NS_FAILED(rv)) return rv;
         if (done) {
             mProcessingHeaders = false;
             rv = SendStart(channel);
             if (NS_FAILED(rv)) return rv;
         }
     }
     int32_t tokenLinefeed = 1;
     while ( (token = FindToken(cursor, bufLen)) ) {
         if (((token + mTokenLen) < (cursor + bufLen)) &&
             (*(token + mTokenLen + 1) == '-')) {
             // This was the last delimiter so we can stop processing
             rv = SendData(cursor, LengthToToken(cursor, token));
             if (NS_FAILED(rv)) return rv;
             return SendStop(NS_OK);
         }
         if (!mNewPart && token > cursor) {
             // headers are processed, we're pushing data now.
             NS_ASSERTION(!mProcessingHeaders, "we should be pushing raw data");
             rv = SendData(cursor, LengthToToken(cursor, token));
             bufLen -= token - cursor;
             if (NS_FAILED(rv)) return rv;
         }
         // XXX else NS_ASSERTION(token == cursor, "?");
         token += mTokenLen;
         bufLen -= mTokenLen;
         tokenLinefeed = PushOverLine(token, bufLen);
         if (mNewPart) {
             // parse headers
             mNewPart = false;
             cursor = token;
             bool done = false;
             rv = ParseHeaders(channel, cursor, bufLen, &done);
             if (NS_FAILED(rv)) return rv;
             if (done) {
                 rv = SendStart(channel);
                 if (NS_FAILED(rv)) return rv;
             }
             else {
                 // we haven't finished processing header info.
                 // we'll break out and try to process later.
                 mProcessingHeaders = true;
                 break;
             }
         }
         else {
             mNewPart = true;
             // Reset state so we don't carry it over from part to part
             mContentType.Truncate();
             mContentLength = UINT64_MAX;
             mContentDisposition.Truncate();
             mIsByteRangeRequest = false;
             mByteRangeStart = 0;
             mByteRangeEnd = 0;
             rv = SendStop(NS_OK);
             if (NS_FAILED(rv)) return rv;
             // reset the token to front. this allows us to treat
             // the token as a starting token.
             token -= mTokenLen + tokenLinefeed;
             bufLen += mTokenLen + tokenLinefeed;
             cursor = token;
         }
     }
     // at this point, we want to buffer up whatever amount (bufLen)
     // we have leftover. However, we *always* want to ensure that
     // we buffer enough data to handle a broken token.
     // carry over
     uint32_t bufAmt = 0;
     if (mProcessingHeaders)
         bufAmt = bufLen;
     else if (bufLen) {
         // if the data ends in a linefeed, and we're in the middle
         // of a "part" (ie. mPartChannel exists) don't bother
         // buffering, go ahead and send the data we have. Otherwise
         // if we don't have a channel already, then we don't even
         // have enough info to start a part, go ahead and buffer
         // enough to collect a boundary token.
         if (!mPartChannel || !(cursor[bufLen-1] == nsCRT::LF) )
             bufAmt = std::min(mTokenLen - 1, bufLen);
     }
     if (bufAmt) {
         rv = BufferData(cursor + (bufLen - bufAmt), bufAmt);
         if (NS_FAILED(rv)) return rv;
         bufLen -= bufAmt;
     }
     if (bufLen) {
         rv = SendData(cursor, bufLen);
         if (NS_FAILED(rv)) return rv;
     }
     return rv;
 }
 // nsIRequestObserver implementation
 NS_IMETHODIMP
 nsMultiMixedConv::OnStartRequest(nsIRequest *request, nsISupports *ctxt) {
     // we're assuming the content-type is available at this stage
     NS_ASSERTION(mToken.IsEmpty(), "a second on start???");
     const char *bndry = nullptr;
     nsAutoCString delimiter;
     nsresult rv = NS_OK;
     mContext = ctxt;
     mFirstOnData = true;
     mTotalSent   = 0;
     nsCOMPtr<nsIChannel> channel = do_QueryInterface(request, &rv);
     if (NS_FAILED(rv)) return rv;
     // ask the HTTP channel for the content-type and extract the boundary from it.
     nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(channel, &rv);
     if (NS_SUCCEEDED(rv)) {
         rv = httpChannel->GetResponseHeader(NS_LITERAL_CSTRING("content-type"), delimiter);
         if (NS_FAILED(rv)) return rv;
     } else {
         // try asking the channel directly
         rv = channel->GetContentType(delimiter);
         if (NS_FAILED(rv)) return NS_ERROR_FAILURE;
     }
     bndry = strstr(delimiter.BeginWriting(), "boundary");
     if (!bndry) return NS_ERROR_FAILURE;
     bndry = strchr(bndry, '=');
     if (!bndry) return NS_ERROR_FAILURE;
     bndry++; // move past the equals sign
     char *attrib = (char *) strchr(bndry, ';');
     if (attrib) *attrib = '\0';
     nsAutoCString boundaryString(bndry);
     if (attrib) *attrib = ';';
     boundaryString.Trim(" \"");
     mToken = boundaryString;
     mTokenLen = boundaryString.Length();
     if (mTokenLen == 0)
         return NS_ERROR_FAILURE;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsMultiMixedConv::OnStopRequest(nsIRequest *request, nsISupports *ctxt,
                                 nsresult aStatus) {
     if (mToken.IsEmpty())  // no token, no love.
         return NS_ERROR_FAILURE;
     if (mPartChannel) {
         mPartChannel->SetIsLastPart();
         // we've already called SendStart() (which sets up the mPartChannel,
         // and fires an OnStart()) send any data left over, and then fire the stop.
         if (mBufLen > 0 && mBuffer) {
             (void) SendData(mBuffer, mBufLen);
             // don't bother checking the return value here, if the send failed
             // we're done anyway as we're in the OnStop() callback.
             free(mBuffer);
             mBuffer = nullptr;
             mBufLen = 0;
         }
         (void) SendStop(aStatus);
     } else if (NS_FAILED(aStatus)) {
         // underlying data production problem. we should not be in
         // the middle of sending data. if we were, mPartChannel,
         // above, would have been true.
         // if we send the start, the URI Loader's m_targetStreamListener, may
         // be pointing at us causing a nice stack overflow.  So, don't call
         // OnStartRequest!  -  This breaks necko's semantecs.
         //(void) mFinalListener->OnStartRequest(request, ctxt);
         (void) mFinalListener->OnStopRequest(request, ctxt, aStatus);
     }
     return NS_OK;
 }
 // nsMultiMixedConv methods
 nsMultiMixedConv::nsMultiMixedConv() :
   mCurrentPartID(0)
 {
     mTokenLen           = 0;
     mNewPart            = true;
     mContentLength      = UINT64_MAX;
     mBuffer             = nullptr;
     mBufLen             = 0;
     mProcessingHeaders  = false;
     mByteRangeStart     = 0;
     mByteRangeEnd       = 0;
     mTotalSent          = 0;
     mIsByteRangeRequest = false;
 }
 nsMultiMixedConv::~nsMultiMixedConv() {
     NS_ASSERTION(!mBuffer, "all buffered data should be gone");
     if (mBuffer) {
         free(mBuffer);
         mBuffer = nullptr;
     }
 }
 nsresult
 nsMultiMixedConv::BufferData(char *aData, uint32_t aLen) {
     NS_ASSERTION(!mBuffer, "trying to over-write buffer");
     char *buffer = (char *) malloc(aLen);
     if (!buffer) return NS_ERROR_OUT_OF_MEMORY;
     memcpy(buffer, aData, aLen);
     mBuffer = buffer;
     mBufLen = aLen;
     return NS_OK;
 }
 nsresult
 nsMultiMixedConv::SendStart(nsIChannel *aChannel) {
     nsresult rv = NS_OK;
     nsCOMPtr<nsIStreamListener> partListener(mFinalListener);
     if (mContentType.IsEmpty()) {
         mContentType.AssignLiteral(UNKNOWN_CONTENT_TYPE);
         nsCOMPtr<nsIStreamConverterService> serv =
             do_GetService(NS_STREAMCONVERTERSERVICE_CONTRACTID, &rv);
         if (NS_SUCCEEDED(rv)) {
             nsCOMPtr<nsIStreamListener> converter;
             rv = serv->AsyncConvertData(UNKNOWN_CONTENT_TYPE,
                                         "*/*",
                                         mFinalListener,
                                         mContext,
                                         getter_AddRefs(converter));
             if (NS_SUCCEEDED(rv)) {
                 partListener = converter;
             }
         }
     }
     // if we already have an mPartChannel, that means we never sent a Stop()
     // before starting up another "part." that would be bad.
     NS_ASSERTION(!mPartChannel, "tisk tisk, shouldn't be overwriting a channel");
     nsPartChannel *newChannel;
     newChannel = new nsPartChannel(aChannel, mCurrentPartID++, partListener);
     if (!newChannel)
         return NS_ERROR_OUT_OF_MEMORY;
     if (mIsByteRangeRequest) {
         newChannel->InitializeByteRange(mByteRangeStart, mByteRangeEnd);
     }
     mTotalSent = 0;
     // Set up the new part channel...
     mPartChannel = newChannel;
     rv = mPartChannel->SetContentType(mContentType);
     if (NS_FAILED(rv)) return rv;
     rv = mPartChannel->SetContentLength(mContentLength);
     if (NS_FAILED(rv)) return rv;
     mPartChannel->SetContentDisposition(mContentDisposition);
     nsLoadFlags loadFlags = 0;
     mPartChannel->GetLoadFlags(&loadFlags);
     loadFlags |= nsIChannel::LOAD_REPLACE;
     mPartChannel->SetLoadFlags(loadFlags);
     nsCOMPtr<nsILoadGroup> loadGroup;
     (void)mPartChannel->GetLoadGroup(getter_AddRefs(loadGroup));
     // Add the new channel to the load group (if any)
     if (loadGroup) {
         rv = loadGroup->AddRequest(mPartChannel, nullptr);
         if (NS_FAILED(rv)) return rv;
     }
     // Let's start off the load. NOTE: we don't forward on the channel passed
     // into our OnDataAvailable() as it's the root channel for the raw stream.
     return mPartChannel->SendOnStartRequest(mContext);
 }
 nsresult
 nsMultiMixedConv::SendStop(nsresult aStatus) {
     nsresult rv = NS_OK;
     if (mPartChannel) {
         rv = mPartChannel->SendOnStopRequest(mContext, aStatus);
         // don't check for failure here, we need to remove the channel from
         // the loadgroup.
         // Remove the channel from its load group (if any)
         nsCOMPtr<nsILoadGroup> loadGroup;
         (void) mPartChannel->GetLoadGroup(getter_AddRefs(loadGroup));
         if (loadGroup)
             (void) loadGroup->RemoveRequest(mPartChannel, mContext, aStatus);
     }
     mPartChannel = 0;
     return rv;
 }
 nsresult
 nsMultiMixedConv::SendData(char *aBuffer, uint32_t aLen) {
     nsresult rv = NS_OK;
     if (!mPartChannel) return NS_ERROR_FAILURE; // something went wrong w/ processing
     if (mContentLength != UINT64_MAX) {
         // make sure that we don't send more than the mContentLength
         // XXX why? perhaps the Content-Length header was actually wrong!!
         if ((uint64_t(aLen) + mTotalSent) > mContentLength)
             aLen = static_cast<uint32_t>(mContentLength - mTotalSent);
         if (aLen == 0)
             return NS_OK;
     }
     uint64_t offset = mTotalSent;
     mTotalSent += aLen;
     nsCOMPtr<nsIStringInputStream> ss(
             do_CreateInstance("@mozilla.org/io/string-input-stream;1", &rv));
     if (NS_FAILED(rv))
         return rv;
     rv = ss->ShareData(aBuffer, aLen);
     if (NS_FAILED(rv))
         return rv;
     nsCOMPtr<nsIInputStream> inStream(do_QueryInterface(ss, &rv));
     if (NS_FAILED(rv)) return rv;
     return mPartChannel->SendOnDataAvailable(mContext, inStream, offset, aLen);
 }
 int32_t
 nsMultiMixedConv::PushOverLine(char *&aPtr, uint32_t &aLen) {
     int32_t chars = 0;
     if ((aLen > 0) && (*aPtr == nsCRT::CR || *aPtr == nsCRT::LF)) {
         if ((aLen > 1) && (aPtr[1] == nsCRT::LF))
             chars++;
         chars++;
         aPtr += chars;
         aLen -= chars;
     }
     return chars;
 }
 nsresult
 nsMultiMixedConv::ParseHeaders(nsIChannel *aChannel, char *&aPtr,
                                uint32_t &aLen, bool *_retval) {
     // NOTE: this data must be ascii.
     // NOTE: aPtr is NOT null terminated!
     nsresult rv = NS_OK;
     char *cursor = aPtr, *newLine = nullptr;
     uint32_t cursorLen = aLen;
     bool done = false;
     uint32_t lineFeedIncrement = 1;
     mContentLength = UINT64_MAX; // XXX what if we were already called?
     while (cursorLen && (newLine = (char *) memchr(cursor, nsCRT::LF, cursorLen))) {
         // adjust for linefeeds
         if ((newLine > cursor) && (newLine[-1] == nsCRT::CR) ) { // CRLF
             lineFeedIncrement = 2;
             newLine--;
         }
         else
             lineFeedIncrement = 1; // reset
         if (newLine == cursor) {
             // move the newLine beyond the linefeed marker
             NS_ASSERTION(cursorLen >= lineFeedIncrement, "oops!");
             cursor += lineFeedIncrement;
             cursorLen -= lineFeedIncrement;
             done = true;
             break;
         }
         char tmpChar = *newLine;
         *newLine = '\0'; // cursor is now null terminated
         char *colon = (char *) strchr(cursor, ':');
         if (colon) {
             *colon = '\0';
             nsAutoCString headerStr(cursor);
             headerStr.CompressWhitespace();
             *colon = ':';
             nsAutoCString headerVal(colon + 1);
             headerVal.CompressWhitespace();
             // examine header
             if (headerStr.LowerCaseEqualsLiteral("content-type")) {
                 mContentType = headerVal;
             } else if (headerStr.LowerCaseEqualsLiteral("content-length")) {
                 mContentLength = nsCRT::atoll(headerVal.get());
             } else if (headerStr.LowerCaseEqualsLiteral("content-disposition")) {
                 mContentDisposition = headerVal;
             } else if (headerStr.LowerCaseEqualsLiteral("set-cookie")) {
                 nsCOMPtr<nsIHttpChannelInternal> httpInternal =
                     do_QueryInterface(aChannel);
                 if (httpInternal) {
                     httpInternal->SetCookie(headerVal.get());
                 }
             } else if (headerStr.LowerCaseEqualsLiteral("content-range") ||
                        headerStr.LowerCaseEqualsLiteral("range") ) {
                 // something like: Content-range: bytes 7000-7999/8000
                 char* tmpPtr;
                 tmpPtr = (char *) strchr(colon + 1, '/');
                 if (tmpPtr)
                     *tmpPtr = '\0';
                 // pass the bytes-unit and the SP
                 char *range = (char *) strchr(colon + 2, ' ');
                 if (!range)
                     return NS_ERROR_FAILURE;
                 do {
                     range++;
                 } while (*range == ' ');
                 if (range[0] == '*'){
                     mByteRangeStart = mByteRangeEnd = 0;
                 }
                 else {
                     tmpPtr = (char *) strchr(range, '-');
                     if (!tmpPtr)
                         return NS_ERROR_FAILURE;
                     tmpPtr[0] = '\0';
                     mByteRangeStart = nsCRT::atoll(range);
                     tmpPtr++;
                     mByteRangeEnd = nsCRT::atoll(tmpPtr);
                 }
                 mIsByteRangeRequest = true;
                 if (mContentLength == UINT64_MAX)
                     mContentLength = uint64_t(mByteRangeEnd - mByteRangeStart + 1);
             }
         }
         *newLine = tmpChar;
         newLine += lineFeedIncrement;
         cursorLen -= (newLine - cursor);
         cursor = newLine;
     }
     aPtr = cursor;
     aLen = cursorLen;
     *_retval = done;
     return rv;
 }
 char *
 nsMultiMixedConv::FindToken(char *aCursor, uint32_t aLen) {
     // strnstr without looking for null termination
     const char *token = mToken.get();
     char *cur = aCursor;
     if (!(token && aCursor && *token)) {
         NS_WARNING("bad data");
         return nullptr;
     }
     for (; aLen >= mTokenLen; aCursor++, aLen--) {
         if (!memcmp(aCursor, token, mTokenLen) ) {
             if ((aCursor - cur) >= 2) {
                 // back the cursor up over a double dash for backwards compat.
                 if ((*(aCursor-1) == '-') && (*(aCursor-2) == '-')) {
                     aCursor -= 2;
                     aLen += 2;
                     // we're playing w/ double dash tokens, adjust.
                     mToken.Assign(aCursor, mTokenLen + 2);
                     mTokenLen = mToken.Length();
                 }
             }
             return aCursor;
         }
     }
     return nullptr;
 }
 nsresult
 NS_NewMultiMixedConv(nsMultiMixedConv** aMultiMixedConv)
 {
     NS_PRECONDITION(aMultiMixedConv != nullptr, "null ptr");
     if (! aMultiMixedConv)
         return NS_ERROR_NULL_POINTER;
     *aMultiMixedConv = new nsMultiMixedConv();
     if (! *aMultiMixedConv)
         return NS_ERROR_OUT_OF_MEMORY;
     NS_ADDREF(*aMultiMixedConv);
     return NS_OK;
 }

The Tor Browser / annotate

netwerk/streamconv/converters/nsMultiMixedConv.cpp@a63d609f5ebe (annotated)

netwerk/streamconv/converters/nsMultiMixedConv.cpp