The Tor Browser: netwerk/base/src/nsMIMEInputStream.cpp@b8a032363ba2 (annotated)

netwerk/base/src/nsMIMEInputStream.cpp@b8a032363ba2 (annotated)

netwerk/base/src/nsMIMEInputStream.cpp

Thu, 22 Jan 2015 13:21:57 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Thu, 22 Jan 2015 13:21:57 +0100
branch: TOR_BUG_9701
changeset 15: b8a032363ba2
permissions: -rw-r--r--

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

 /* -*- Mode: C++; tab-width: 4; 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/. */
 /**
  * The MIME stream separates headers and a datastream. It also allows
  * automatic creation of the content-length header.
  */
 #include "ipc/IPCMessageUtils.h"
 #include "nsCOMPtr.h"
 #include "nsComponentManagerUtils.h"
 #include "nsIMultiplexInputStream.h"
 #include "nsIMIMEInputStream.h"
 #include "nsISeekableStream.h"
 #include "nsIStringStream.h"
 #include "nsString.h"
 #include "nsMIMEInputStream.h"
 #include "nsIClassInfoImpl.h"
 #include "nsIIPCSerializableInputStream.h"
 #include "mozilla/ipc/InputStreamUtils.h"
 using namespace mozilla::ipc;
 class nsMIMEInputStream : public nsIMIMEInputStream,
                           public nsISeekableStream,
                           public nsIIPCSerializableInputStream
 {
 public:
     nsMIMEInputStream();
     virtual ~nsMIMEInputStream();
     NS_DECL_THREADSAFE_ISUPPORTS
     NS_DECL_NSIINPUTSTREAM
     NS_DECL_NSIMIMEINPUTSTREAM
     NS_DECL_NSISEEKABLESTREAM
     NS_DECL_NSIIPCSERIALIZABLEINPUTSTREAM
     NS_METHOD Init();
 private:
     void InitStreams();
     struct ReadSegmentsState {
         nsIInputStream* mThisStream;
         nsWriteSegmentFun mWriter;
         void* mClosure;
     };
     static NS_METHOD ReadSegCb(nsIInputStream* aIn, void* aClosure,
                                const char* aFromRawSegment, uint32_t aToOffset,
                                uint32_t aCount, uint32_t *aWriteCount);
     nsCString mHeaders;
     nsCOMPtr<nsIStringInputStream> mHeaderStream;
     nsCString mContentLength;
     nsCOMPtr<nsIStringInputStream> mCLStream;
     nsCOMPtr<nsIInputStream> mData;
     nsCOMPtr<nsIMultiplexInputStream> mStream;
     bool mAddContentLength;
     bool mStartedReading;
 };
 NS_IMPL_ADDREF(nsMIMEInputStream)
 NS_IMPL_RELEASE(nsMIMEInputStream)
 NS_IMPL_CLASSINFO(nsMIMEInputStream, nullptr, nsIClassInfo::THREADSAFE,
                   NS_MIMEINPUTSTREAM_CID)
 NS_IMPL_QUERY_INTERFACE_CI(nsMIMEInputStream,
                            nsIMIMEInputStream,
                            nsIInputStream,
                            nsISeekableStream,
                            nsIIPCSerializableInputStream)
 NS_IMPL_CI_INTERFACE_GETTER(nsMIMEInputStream,
                             nsIMIMEInputStream,
                             nsIInputStream,
                             nsISeekableStream)
 nsMIMEInputStream::nsMIMEInputStream() : mAddContentLength(false),
                                          mStartedReading(false)
 {
 }
 nsMIMEInputStream::~nsMIMEInputStream()
 {
 }
 NS_METHOD nsMIMEInputStream::Init()
 {
     nsresult rv = NS_OK;
     mStream = do_CreateInstance("@mozilla.org/io/multiplex-input-stream;1",
                                 &rv);
     NS_ENSURE_SUCCESS(rv, rv);
     mHeaderStream = do_CreateInstance("@mozilla.org/io/string-input-stream;1",
                                       &rv);
     NS_ENSURE_SUCCESS(rv, rv);
     mCLStream = do_CreateInstance("@mozilla.org/io/string-input-stream;1", &rv);
     NS_ENSURE_SUCCESS(rv, rv);
     rv = mStream->AppendStream(mHeaderStream);
     NS_ENSURE_SUCCESS(rv, rv);
     rv = mStream->AppendStream(mCLStream);
     NS_ENSURE_SUCCESS(rv, rv);
     return NS_OK;
 }
 /* attribute boolean addContentLength; */
 NS_IMETHODIMP
 nsMIMEInputStream::GetAddContentLength(bool *aAddContentLength)
 {
     *aAddContentLength = mAddContentLength;
     return NS_OK;
 }
 NS_IMETHODIMP
 nsMIMEInputStream::SetAddContentLength(bool aAddContentLength)
 {
     NS_ENSURE_FALSE(mStartedReading, NS_ERROR_FAILURE);
     mAddContentLength = aAddContentLength;
     return NS_OK;
 }
 /* void addHeader ([const] in string name, [const] in string value); */
 NS_IMETHODIMP
 nsMIMEInputStream::AddHeader(const char *aName, const char *aValue)
 {
     NS_ENSURE_FALSE(mStartedReading, NS_ERROR_FAILURE);
     mHeaders.Append(aName);
     mHeaders.AppendLiteral(": ");
     mHeaders.Append(aValue);
     mHeaders.AppendLiteral("\r\n");
     // Just in case someone somehow uses our stream, lets at least
     // let the stream have a valid pointer. The stream will be properly
     // initialized in nsMIMEInputStream::InitStreams
     mHeaderStream->ShareData(mHeaders.get(), 0);
     return NS_OK;
 }
 /* void setData (in nsIInputStream stream); */
 NS_IMETHODIMP
 nsMIMEInputStream::SetData(nsIInputStream *aStream)
 {
     NS_ENSURE_FALSE(mStartedReading, NS_ERROR_FAILURE);
     // Remove the old stream if there is one
     if (mData)
         mStream->RemoveStream(2);
     mData = aStream;
     if (aStream)
         mStream->AppendStream(mData);
     return NS_OK;
 }
 // set up the internal streams
 void nsMIMEInputStream::InitStreams()
 {
     NS_ASSERTION(!mStartedReading,
                  "Don't call initStreams twice without rewinding");
     mStartedReading = true;
     // We'll use the content-length stream to add the final \r\n
     if (mAddContentLength) {
         uint64_t cl = 0;
         if (mData) {
             mData->Available(&cl);
         }
         mContentLength.AssignLiteral("Content-Length: ");
         mContentLength.AppendInt(cl);
         mContentLength.AppendLiteral("\r\n\r\n");
     }
     else {
         mContentLength.AssignLiteral("\r\n");
     }
     mCLStream->ShareData(mContentLength.get(), -1);
     mHeaderStream->ShareData(mHeaders.get(), -1);
 }
 #define INITSTREAMS         \
 if (!mStartedReading) {     \
     InitStreams();          \
 }
 // Reset mStartedReading when Seek-ing to start
 NS_IMETHODIMP
 nsMIMEInputStream::Seek(int32_t whence, int64_t offset)
 {
     nsresult rv;
     nsCOMPtr<nsISeekableStream> stream = do_QueryInterface(mStream);
     if (whence == NS_SEEK_SET && offset == 0) {
         rv = stream->Seek(whence, offset);
         if (NS_SUCCEEDED(rv))
             mStartedReading = false;
     }
     else {
         INITSTREAMS;
         rv = stream->Seek(whence, offset);
     }
     return rv;
 }
 // Proxy ReadSegments since we need to be a good little nsIInputStream
 NS_IMETHODIMP nsMIMEInputStream::ReadSegments(nsWriteSegmentFun aWriter,
                                               void *aClosure, uint32_t aCount,
                                               uint32_t *_retval)
 {
     INITSTREAMS;
     ReadSegmentsState state;
     state.mThisStream = this;
     state.mWriter = aWriter;
     state.mClosure = aClosure;
     return mStream->ReadSegments(ReadSegCb, &state, aCount, _retval);
 }
 NS_METHOD
 nsMIMEInputStream::ReadSegCb(nsIInputStream* aIn, void* aClosure,
                              const char* aFromRawSegment,
                              uint32_t aToOffset, uint32_t aCount,
                              uint32_t *aWriteCount)
 {
     ReadSegmentsState* state = (ReadSegmentsState*)aClosure;
     return  (state->mWriter)(state->mThisStream,
                              state->mClosure,
                              aFromRawSegment,
                              aToOffset,
                              aCount,
                              aWriteCount);
 }
 /**
  * Forward everything else to the mStream after calling InitStreams()
  */
 // nsIInputStream
 NS_IMETHODIMP nsMIMEInputStream::Close(void) { INITSTREAMS; return mStream->Close(); }
 NS_IMETHODIMP nsMIMEInputStream::Available(uint64_t *_retval) { INITSTREAMS; return mStream->Available(_retval); }
 NS_IMETHODIMP nsMIMEInputStream::Read(char * buf, uint32_t count, uint32_t *_retval) { INITSTREAMS; return mStream->Read(buf, count, _retval); }
 NS_IMETHODIMP nsMIMEInputStream::IsNonBlocking(bool *aNonBlocking) { INITSTREAMS; return mStream->IsNonBlocking(aNonBlocking); }
 // nsISeekableStream
 NS_IMETHODIMP nsMIMEInputStream::Tell(int64_t *_retval)
 {
     INITSTREAMS;
     nsCOMPtr<nsISeekableStream> stream = do_QueryInterface(mStream);
     return stream->Tell(_retval);
 }
 NS_IMETHODIMP nsMIMEInputStream::SetEOF(void) {
     INITSTREAMS;
     nsCOMPtr<nsISeekableStream> stream = do_QueryInterface(mStream);
     return stream->SetEOF();
 }
 /**
  * Factory method used by do_CreateInstance
  */
 nsresult
 nsMIMEInputStreamConstructor(nsISupports *outer, REFNSIID iid, void **result)
 {
     *result = nullptr;
     if (outer)
         return NS_ERROR_NO_AGGREGATION;
     nsMIMEInputStream *inst = new nsMIMEInputStream();
     if (!inst)
         return NS_ERROR_OUT_OF_MEMORY;
     NS_ADDREF(inst);
     nsresult rv = inst->Init();
     if (NS_FAILED(rv)) {
         NS_RELEASE(inst);
         return rv;
     }
     rv = inst->QueryInterface(iid, result);
     NS_RELEASE(inst);
     return rv;
 }
 void
 nsMIMEInputStream::Serialize(InputStreamParams& aParams,
                              FileDescriptorArray& aFileDescriptors)
 {
     MIMEInputStreamParams params;
     if (mData) {
         nsCOMPtr<nsIInputStream> stream = do_QueryInterface(mData);
         MOZ_ASSERT(stream);
         InputStreamParams wrappedParams;
         SerializeInputStream(stream, wrappedParams, aFileDescriptors);
         NS_ASSERTION(wrappedParams.type() != InputStreamParams::T__None,
                      "Wrapped stream failed to serialize!");
         params.optionalStream() = wrappedParams;
     }
     else {
         params.optionalStream() = mozilla::void_t();
     }
     params.headers() = mHeaders;
     params.contentLength() = mContentLength;
     params.startedReading() = mStartedReading;
     params.addContentLength() = mAddContentLength;
     aParams = params;
 }
 bool
 nsMIMEInputStream::Deserialize(const InputStreamParams& aParams,
                                const FileDescriptorArray& aFileDescriptors)
 {
     if (aParams.type() != InputStreamParams::TMIMEInputStreamParams) {
         NS_ERROR("Received unknown parameters from the other process!");
         return false;
     }
     const MIMEInputStreamParams& params =
         aParams.get_MIMEInputStreamParams();
     const OptionalInputStreamParams& wrappedParams = params.optionalStream();
     mHeaders = params.headers();
     mContentLength = params.contentLength();
     mStartedReading = params.startedReading();
     // nsMIMEInputStream::Init() already appended mHeaderStream & mCLStream
     mHeaderStream->ShareData(mHeaders.get(),
                              mStartedReading ? mHeaders.Length() : 0);
     mCLStream->ShareData(mContentLength.get(),
                          mStartedReading ? mContentLength.Length() : 0);
     nsCOMPtr<nsIInputStream> stream;
     if (wrappedParams.type() == OptionalInputStreamParams::TInputStreamParams) {
         stream = DeserializeInputStream(wrappedParams.get_InputStreamParams(),
                                         aFileDescriptors);
         if (!stream) {
             NS_WARNING("Failed to deserialize wrapped stream!");
             return false;
         }
         mData = stream;
         if (NS_FAILED(mStream->AppendStream(mData))) {
             NS_WARNING("Failed to append stream!");
             return false;
         }
     }
     else {
         NS_ASSERTION(wrappedParams.type() == OptionalInputStreamParams::Tvoid_t,
                      "Unknown type for OptionalInputStreamParams!");
     }
     mAddContentLength = params.addContentLength();
     return true;
 }

The Tor Browser / annotate

netwerk/base/src/nsMIMEInputStream.cpp@b8a032363ba2 (annotated)

netwerk/base/src/nsMIMEInputStream.cpp