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tenfourfox/netwerk/base/nsMIMEInputStream.cpp

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/* -*- 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
{
virtual ~nsMIMEInputStream();
public:
nsMIMEInputStream();
NS_DECL_THREADSAFE_ISUPPORTS
NS_DECL_NSIINPUTSTREAM
NS_DECL_NSIMIMEINPUTSTREAM
NS_DECL_NSISEEKABLESTREAM
NS_DECL_NSIIPCSERIALIZABLEINPUTSTREAM
NS_METHOD Init();
private:
void InitStreams();
struct MOZ_STACK_CLASS ReadSegmentsState {
nsCOMPtr<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;
}
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;
}
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;
}
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;
}
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