mirror of
https://github.com/mozilla/gecko-dev.git
synced 2024-11-06 09:05:45 +00:00
376 lines
11 KiB
C++
376 lines
11 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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/**
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* The MIME stream separates headers and a datastream. It also allows
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* automatic creation of the content-length header.
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*/
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#include "ipc/IPCMessageUtils.h"
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#include "nsCOMPtr.h"
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#include "nsComponentManagerUtils.h"
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#include "nsIMultiplexInputStream.h"
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#include "nsIMIMEInputStream.h"
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#include "nsISeekableStream.h"
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#include "nsIStringStream.h"
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#include "nsString.h"
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#include "nsMIMEInputStream.h"
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#include "nsIClassInfoImpl.h"
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#include "nsIIPCSerializableInputStream.h"
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#include "mozilla/ipc/InputStreamUtils.h"
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using namespace mozilla::ipc;
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class nsMIMEInputStream : public nsIMIMEInputStream,
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public nsISeekableStream,
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public nsIIPCSerializableInputStream
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{
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virtual ~nsMIMEInputStream();
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public:
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nsMIMEInputStream();
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NS_DECL_THREADSAFE_ISUPPORTS
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NS_DECL_NSIINPUTSTREAM
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NS_DECL_NSIMIMEINPUTSTREAM
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NS_DECL_NSISEEKABLESTREAM
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NS_DECL_NSIIPCSERIALIZABLEINPUTSTREAM
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NS_METHOD Init();
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private:
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void InitStreams();
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struct MOZ_STACK_CLASS ReadSegmentsState {
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nsCOMPtr<nsIInputStream> mThisStream;
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nsWriteSegmentFun mWriter;
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void* mClosure;
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};
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static NS_METHOD ReadSegCb(nsIInputStream* aIn, void* aClosure,
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const char* aFromRawSegment, uint32_t aToOffset,
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uint32_t aCount, uint32_t *aWriteCount);
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nsCString mHeaders;
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nsCOMPtr<nsIStringInputStream> mHeaderStream;
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nsCString mContentLength;
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nsCOMPtr<nsIStringInputStream> mCLStream;
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nsCOMPtr<nsIInputStream> mData;
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nsCOMPtr<nsIMultiplexInputStream> mStream;
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bool mAddContentLength;
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bool mStartedReading;
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};
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NS_IMPL_ADDREF(nsMIMEInputStream)
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NS_IMPL_RELEASE(nsMIMEInputStream)
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NS_IMPL_CLASSINFO(nsMIMEInputStream, nullptr, nsIClassInfo::THREADSAFE,
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NS_MIMEINPUTSTREAM_CID)
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NS_IMPL_QUERY_INTERFACE_CI(nsMIMEInputStream,
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nsIMIMEInputStream,
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nsIInputStream,
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nsISeekableStream,
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nsIIPCSerializableInputStream)
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NS_IMPL_CI_INTERFACE_GETTER(nsMIMEInputStream,
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nsIMIMEInputStream,
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nsIInputStream,
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nsISeekableStream)
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nsMIMEInputStream::nsMIMEInputStream() : mAddContentLength(false),
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mStartedReading(false)
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{
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}
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nsMIMEInputStream::~nsMIMEInputStream()
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{
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}
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NS_METHOD nsMIMEInputStream::Init()
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{
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nsresult rv = NS_OK;
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mStream = do_CreateInstance("@mozilla.org/io/multiplex-input-stream;1",
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&rv);
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NS_ENSURE_SUCCESS(rv, rv);
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mHeaderStream = do_CreateInstance("@mozilla.org/io/string-input-stream;1",
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&rv);
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NS_ENSURE_SUCCESS(rv, rv);
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mCLStream = do_CreateInstance("@mozilla.org/io/string-input-stream;1", &rv);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = mStream->AppendStream(mHeaderStream);
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NS_ENSURE_SUCCESS(rv, rv);
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rv = mStream->AppendStream(mCLStream);
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NS_ENSURE_SUCCESS(rv, rv);
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return NS_OK;
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}
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/* attribute boolean addContentLength; */
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NS_IMETHODIMP
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nsMIMEInputStream::GetAddContentLength(bool *aAddContentLength)
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{
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*aAddContentLength = mAddContentLength;
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return NS_OK;
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}
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NS_IMETHODIMP
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nsMIMEInputStream::SetAddContentLength(bool aAddContentLength)
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{
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NS_ENSURE_FALSE(mStartedReading, NS_ERROR_FAILURE);
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mAddContentLength = aAddContentLength;
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return NS_OK;
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}
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/* void addHeader ([const] in string name, [const] in string value); */
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NS_IMETHODIMP
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nsMIMEInputStream::AddHeader(const char *aName, const char *aValue)
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{
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NS_ENSURE_FALSE(mStartedReading, NS_ERROR_FAILURE);
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mHeaders.Append(aName);
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mHeaders.AppendLiteral(": ");
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mHeaders.Append(aValue);
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mHeaders.AppendLiteral("\r\n");
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// Just in case someone somehow uses our stream, lets at least
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// let the stream have a valid pointer. The stream will be properly
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// initialized in nsMIMEInputStream::InitStreams
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mHeaderStream->ShareData(mHeaders.get(), 0);
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return NS_OK;
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}
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/* void setData (in nsIInputStream stream); */
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NS_IMETHODIMP
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nsMIMEInputStream::SetData(nsIInputStream *aStream)
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{
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NS_ENSURE_FALSE(mStartedReading, NS_ERROR_FAILURE);
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// Remove the old stream if there is one
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if (mData)
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mStream->RemoveStream(2);
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mData = aStream;
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if (aStream)
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mStream->AppendStream(mData);
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return NS_OK;
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}
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// set up the internal streams
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void nsMIMEInputStream::InitStreams()
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{
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NS_ASSERTION(!mStartedReading,
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"Don't call initStreams twice without rewinding");
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mStartedReading = true;
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// We'll use the content-length stream to add the final \r\n
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if (mAddContentLength) {
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uint64_t cl = 0;
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if (mData) {
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mData->Available(&cl);
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}
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mContentLength.AssignLiteral("Content-Length: ");
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mContentLength.AppendInt(cl);
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mContentLength.AppendLiteral("\r\n\r\n");
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}
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else {
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mContentLength.AssignLiteral("\r\n");
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}
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mCLStream->ShareData(mContentLength.get(), -1);
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mHeaderStream->ShareData(mHeaders.get(), -1);
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}
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#define INITSTREAMS \
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if (!mStartedReading) { \
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InitStreams(); \
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}
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// Reset mStartedReading when Seek-ing to start
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NS_IMETHODIMP
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nsMIMEInputStream::Seek(int32_t whence, int64_t offset)
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{
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nsresult rv;
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nsCOMPtr<nsISeekableStream> stream = do_QueryInterface(mStream);
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if (whence == NS_SEEK_SET && offset == 0) {
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rv = stream->Seek(whence, offset);
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if (NS_SUCCEEDED(rv))
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mStartedReading = false;
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}
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else {
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INITSTREAMS;
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rv = stream->Seek(whence, offset);
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}
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return rv;
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}
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// Proxy ReadSegments since we need to be a good little nsIInputStream
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NS_IMETHODIMP nsMIMEInputStream::ReadSegments(nsWriteSegmentFun aWriter,
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void *aClosure, uint32_t aCount,
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uint32_t *_retval)
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{
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INITSTREAMS;
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ReadSegmentsState state;
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state.mThisStream = this;
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state.mWriter = aWriter;
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state.mClosure = aClosure;
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return mStream->ReadSegments(ReadSegCb, &state, aCount, _retval);
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}
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NS_METHOD
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nsMIMEInputStream::ReadSegCb(nsIInputStream* aIn, void* aClosure,
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const char* aFromRawSegment,
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uint32_t aToOffset, uint32_t aCount,
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uint32_t *aWriteCount)
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{
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ReadSegmentsState* state = (ReadSegmentsState*)aClosure;
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return (state->mWriter)(state->mThisStream,
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state->mClosure,
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aFromRawSegment,
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aToOffset,
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aCount,
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aWriteCount);
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}
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/**
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* Forward everything else to the mStream after calling InitStreams()
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*/
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// nsIInputStream
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NS_IMETHODIMP nsMIMEInputStream::Close(void) { INITSTREAMS; return mStream->Close(); }
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NS_IMETHODIMP nsMIMEInputStream::Available(uint64_t *_retval) { INITSTREAMS; return mStream->Available(_retval); }
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NS_IMETHODIMP nsMIMEInputStream::Read(char * buf, uint32_t count, uint32_t *_retval) { INITSTREAMS; return mStream->Read(buf, count, _retval); }
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NS_IMETHODIMP nsMIMEInputStream::IsNonBlocking(bool *aNonBlocking) { INITSTREAMS; return mStream->IsNonBlocking(aNonBlocking); }
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// nsISeekableStream
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NS_IMETHODIMP nsMIMEInputStream::Tell(int64_t *_retval)
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{
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INITSTREAMS;
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nsCOMPtr<nsISeekableStream> stream = do_QueryInterface(mStream);
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return stream->Tell(_retval);
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}
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NS_IMETHODIMP nsMIMEInputStream::SetEOF(void) {
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INITSTREAMS;
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nsCOMPtr<nsISeekableStream> stream = do_QueryInterface(mStream);
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return stream->SetEOF();
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}
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/**
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* Factory method used by do_CreateInstance
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*/
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nsresult
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nsMIMEInputStreamConstructor(nsISupports *outer, REFNSIID iid, void **result)
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{
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*result = nullptr;
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if (outer)
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return NS_ERROR_NO_AGGREGATION;
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nsMIMEInputStream *inst = new nsMIMEInputStream();
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if (!inst)
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return NS_ERROR_OUT_OF_MEMORY;
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NS_ADDREF(inst);
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nsresult rv = inst->Init();
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if (NS_FAILED(rv)) {
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NS_RELEASE(inst);
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return rv;
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}
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rv = inst->QueryInterface(iid, result);
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NS_RELEASE(inst);
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return rv;
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}
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void
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nsMIMEInputStream::Serialize(InputStreamParams& aParams,
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FileDescriptorArray& aFileDescriptors)
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{
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MIMEInputStreamParams params;
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if (mData) {
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nsCOMPtr<nsIInputStream> stream = do_QueryInterface(mData);
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MOZ_ASSERT(stream);
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InputStreamParams wrappedParams;
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SerializeInputStream(stream, wrappedParams, aFileDescriptors);
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NS_ASSERTION(wrappedParams.type() != InputStreamParams::T__None,
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"Wrapped stream failed to serialize!");
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params.optionalStream() = wrappedParams;
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}
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else {
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params.optionalStream() = mozilla::void_t();
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}
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params.headers() = mHeaders;
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params.contentLength() = mContentLength;
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params.startedReading() = mStartedReading;
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params.addContentLength() = mAddContentLength;
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aParams = params;
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}
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bool
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nsMIMEInputStream::Deserialize(const InputStreamParams& aParams,
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const FileDescriptorArray& aFileDescriptors)
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{
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if (aParams.type() != InputStreamParams::TMIMEInputStreamParams) {
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NS_ERROR("Received unknown parameters from the other process!");
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return false;
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}
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const MIMEInputStreamParams& params =
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aParams.get_MIMEInputStreamParams();
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const OptionalInputStreamParams& wrappedParams = params.optionalStream();
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mHeaders = params.headers();
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mContentLength = params.contentLength();
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mStartedReading = params.startedReading();
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// nsMIMEInputStream::Init() already appended mHeaderStream & mCLStream
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mHeaderStream->ShareData(mHeaders.get(),
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mStartedReading ? mHeaders.Length() : 0);
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mCLStream->ShareData(mContentLength.get(),
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mStartedReading ? mContentLength.Length() : 0);
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nsCOMPtr<nsIInputStream> stream;
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if (wrappedParams.type() == OptionalInputStreamParams::TInputStreamParams) {
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stream = DeserializeInputStream(wrappedParams.get_InputStreamParams(),
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aFileDescriptors);
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if (!stream) {
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NS_WARNING("Failed to deserialize wrapped stream!");
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return false;
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}
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mData = stream;
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if (NS_FAILED(mStream->AppendStream(mData))) {
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NS_WARNING("Failed to append stream!");
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return false;
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}
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}
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else {
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NS_ASSERTION(wrappedParams.type() == OptionalInputStreamParams::Tvoid_t,
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"Unknown type for OptionalInputStreamParams!");
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}
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mAddContentLength = params.addContentLength();
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return true;
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}
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