gecko-dev/netwerk/protocol/ftp/FTPChannelParent.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set sw=2 ts=8 et tw=80 : */
/* 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 "mozilla/net/FTPChannelParent.h"
#include "nsFTPChannel.h"
#include "nsNetUtil.h"
#include "nsFtpProtocolHandler.h"
#include "nsIEncodedChannel.h"
#include "nsIHttpChannelInternal.h"
#include "nsIForcePendingChannel.h"
#include "mozilla/ipc/InputStreamUtils.h"
#include "mozilla/ipc/URIUtils.h"
#include "mozilla/unused.h"
#include "SerializedLoadContext.h"
#include "nsIContentPolicy.h"
#include "mozilla/ipc/BackgroundUtils.h"
#include "nsIOService.h"
#include "mozilla/LoadInfo.h"
using namespace mozilla::ipc;
#undef LOG
#define LOG(args) MOZ_LOG(gFTPLog, mozilla::LogLevel::Debug, args)
namespace mozilla {
namespace net {
FTPChannelParent::FTPChannelParent(nsILoadContext* aLoadContext, PBOverrideStatus aOverrideStatus)
: mIPCClosed(false)
, mLoadContext(aLoadContext)
, mPBOverride(aOverrideStatus)
, mStatus(NS_OK)
, mDivertingFromChild(false)
, mDivertedOnStartRequest(false)
, mSuspendedForDiversion(false)
{
nsIProtocolHandler* handler;
CallGetService(NS_NETWORK_PROTOCOL_CONTRACTID_PREFIX "ftp", &handler);
NS_ASSERTION(handler, "no ftp handler");
mObserver = new OfflineObserver(this);
}
FTPChannelParent::~FTPChannelParent()
{
gFtpHandler->Release();
if (mObserver) {
mObserver->RemoveObserver();
}
}
void
FTPChannelParent::ActorDestroy(ActorDestroyReason why)
{
// We may still have refcount>0 if the channel hasn't called OnStopRequest
// yet, but we must not send any more msgs to child.
mIPCClosed = true;
}
//-----------------------------------------------------------------------------
// FTPChannelParent::nsISupports
//-----------------------------------------------------------------------------
NS_IMPL_ISUPPORTS(FTPChannelParent,
nsIStreamListener,
nsIParentChannel,
nsIInterfaceRequestor,
nsIRequestObserver,
nsIChannelEventSink)
//-----------------------------------------------------------------------------
// FTPChannelParent::PFTPChannelParent
//-----------------------------------------------------------------------------
//-----------------------------------------------------------------------------
// FTPChannelParent methods
//-----------------------------------------------------------------------------
bool
FTPChannelParent::Init(const FTPChannelCreationArgs& aArgs)
{
switch (aArgs.type()) {
case FTPChannelCreationArgs::TFTPChannelOpenArgs:
{
const FTPChannelOpenArgs& a = aArgs.get_FTPChannelOpenArgs();
return DoAsyncOpen(a.uri(), a.startPos(), a.entityID(), a.uploadStream(),
a.loadInfo());
}
case FTPChannelCreationArgs::TFTPChannelConnectArgs:
{
const FTPChannelConnectArgs& cArgs = aArgs.get_FTPChannelConnectArgs();
return ConnectChannel(cArgs.channelId());
}
default:
NS_NOTREACHED("unknown open type");
return false;
}
}
bool
FTPChannelParent::DoAsyncOpen(const URIParams& aURI,
const uint64_t& aStartPos,
const nsCString& aEntityID,
const OptionalInputStreamParams& aUploadStream,
const LoadInfoArgs& aLoadInfoArgs)
{
nsCOMPtr<nsIURI> uri = DeserializeURI(aURI);
if (!uri)
return false;
#ifdef DEBUG
nsCString uriSpec;
uri->GetSpec(uriSpec);
LOG(("FTPChannelParent DoAsyncOpen [this=%p uri=%s]\n",
this, uriSpec.get()));
#endif
bool app_offline = false;
uint32_t appId = GetAppId();
if (appId != NECKO_UNKNOWN_APP_ID &&
appId != NECKO_NO_APP_ID) {
gIOService->IsAppOffline(appId, &app_offline);
LOG(("FTP app id %u is offline %d\n", appId, app_offline));
}
if (app_offline)
return SendFailedAsyncOpen(NS_ERROR_OFFLINE);
nsresult rv;
nsCOMPtr<nsIIOService> ios(do_GetIOService(&rv));
if (NS_FAILED(rv))
return SendFailedAsyncOpen(rv);
nsCOMPtr<nsILoadInfo> loadInfo;
rv = mozilla::ipc::LoadInfoArgsToLoadInfo(aLoadInfoArgs,
getter_AddRefs(loadInfo));
if (NS_FAILED(rv)) {
return SendFailedAsyncOpen(rv);
}
nsCOMPtr<nsIChannel> chan;
rv = NS_NewChannelInternal(getter_AddRefs(chan), uri, loadInfo,
nullptr, nullptr,
nsIRequest::LOAD_NORMAL, ios);
if (NS_FAILED(rv))
return SendFailedAsyncOpen(rv);
mChannel = chan;
// later on mChannel may become an HTTP channel (we'll be redirected to one
// if we're using a proxy), but for now this is safe
nsFtpChannel* ftpChan = static_cast<nsFtpChannel*>(mChannel.get());
if (mPBOverride != kPBOverride_Unset) {
ftpChan->SetPrivate(mPBOverride == kPBOverride_Private ? true : false);
}
rv = ftpChan->SetNotificationCallbacks(this);
if (NS_FAILED(rv))
return SendFailedAsyncOpen(rv);
nsTArray<mozilla::ipc::FileDescriptor> fds;
nsCOMPtr<nsIInputStream> upload = DeserializeInputStream(aUploadStream, fds);
if (upload) {
// contentType and contentLength are ignored
rv = ftpChan->SetUploadStream(upload, EmptyCString(), 0);
if (NS_FAILED(rv))
return SendFailedAsyncOpen(rv);
}
rv = ftpChan->ResumeAt(aStartPos, aEntityID);
if (NS_FAILED(rv))
return SendFailedAsyncOpen(rv);
rv = ftpChan->AsyncOpen(this, nullptr);
if (NS_FAILED(rv))
return SendFailedAsyncOpen(rv);
return true;
}
bool
FTPChannelParent::ConnectChannel(const uint32_t& channelId)
{
nsresult rv;
LOG(("Looking for a registered channel [this=%p, id=%d]", this, channelId));
nsCOMPtr<nsIChannel> channel;
rv = NS_LinkRedirectChannels(channelId, this, getter_AddRefs(channel));
if (NS_SUCCEEDED(rv))
mChannel = channel;
LOG((" found channel %p, rv=%08x", mChannel.get(), rv));
return true;
}
bool
FTPChannelParent::RecvCancel(const nsresult& status)
{
if (mChannel)
mChannel->Cancel(status);
return true;
}
bool
FTPChannelParent::RecvSuspend()
{
if (mChannel)
mChannel->Suspend();
return true;
}
bool
FTPChannelParent::RecvResume()
{
if (mChannel)
mChannel->Resume();
return true;
}
bool
FTPChannelParent::RecvDivertOnDataAvailable(const nsCString& data,
const uint64_t& offset,
const uint32_t& count)
{
if (NS_WARN_IF(!mDivertingFromChild)) {
MOZ_ASSERT(mDivertingFromChild,
"Cannot RecvDivertOnDataAvailable if diverting is not set!");
FailDiversion(NS_ERROR_UNEXPECTED);
return false;
}
// Drop OnDataAvailables if the parent was canceled already.
if (NS_FAILED(mStatus)) {
return true;
}
nsCOMPtr<nsIInputStream> stringStream;
nsresult rv = NS_NewByteInputStream(getter_AddRefs(stringStream), data.get(),
count, NS_ASSIGNMENT_DEPEND);
if (NS_FAILED(rv)) {
if (mChannel) {
mChannel->Cancel(rv);
}
mStatus = rv;
return true;
}
rv = OnDataAvailable(mChannel, nullptr, stringStream, offset, count);
stringStream->Close();
if (NS_FAILED(rv)) {
if (mChannel) {
mChannel->Cancel(rv);
}
mStatus = rv;
}
return true;
}
bool
FTPChannelParent::RecvDivertOnStopRequest(const nsresult& statusCode)
{
if (NS_WARN_IF(!mDivertingFromChild)) {
MOZ_ASSERT(mDivertingFromChild,
"Cannot RecvDivertOnStopRequest if diverting is not set!");
FailDiversion(NS_ERROR_UNEXPECTED);
return false;
}
// Honor the channel's status even if the underlying transaction completed.
nsresult status = NS_FAILED(mStatus) ? mStatus : statusCode;
// Reset fake pending status in case OnStopRequest has already been called.
if (mChannel) {
nsCOMPtr<nsIForcePendingChannel> forcePendingIChan = do_QueryInterface(mChannel);
if (forcePendingIChan) {
forcePendingIChan->ForcePending(false);
}
}
OnStopRequest(mChannel, nullptr, status);
return true;
}
bool
FTPChannelParent::RecvDivertComplete()
{
if (NS_WARN_IF(!mDivertingFromChild)) {
MOZ_ASSERT(mDivertingFromChild,
"Cannot RecvDivertComplete if diverting is not set!");
FailDiversion(NS_ERROR_UNEXPECTED);
return false;
}
nsresult rv = ResumeForDiversion();
if (NS_WARN_IF(NS_FAILED(rv))) {
FailDiversion(NS_ERROR_UNEXPECTED);
return false;
}
return true;
}
//-----------------------------------------------------------------------------
// FTPChannelParent::nsIRequestObserver
//-----------------------------------------------------------------------------
NS_IMETHODIMP
FTPChannelParent::OnStartRequest(nsIRequest* aRequest, nsISupports* aContext)
{
LOG(("FTPChannelParent::OnStartRequest [this=%p]\n", this));
if (mDivertingFromChild) {
MOZ_RELEASE_ASSERT(mDivertToListener,
"Cannot divert if listener is unset!");
return mDivertToListener->OnStartRequest(aRequest, aContext);
}
nsCOMPtr<nsIChannel> chan = do_QueryInterface(aRequest);
MOZ_ASSERT(chan);
NS_ENSURE_TRUE(chan, NS_ERROR_UNEXPECTED);
int64_t contentLength;
chan->GetContentLength(&contentLength);
nsCString contentType;
chan->GetContentType(contentType);
nsCString entityID;
nsCOMPtr<nsIResumableChannel> resChan = do_QueryInterface(aRequest);
MOZ_ASSERT(resChan); // both FTP and HTTP should implement nsIResumableChannel
if (resChan) {
resChan->GetEntityID(entityID);
}
PRTime lastModified = 0;
nsCOMPtr<nsIFTPChannel> ftpChan = do_QueryInterface(aRequest);
if (ftpChan) {
ftpChan->GetLastModifiedTime(&lastModified);
}
nsCOMPtr<nsIHttpChannelInternal> httpChan = do_QueryInterface(aRequest);
if (httpChan) {
httpChan->GetLastModifiedTime(&lastModified);
}
URIParams uriparam;
nsCOMPtr<nsIURI> uri;
chan->GetURI(getter_AddRefs(uri));
SerializeURI(uri, uriparam);
if (mIPCClosed || !SendOnStartRequest(mStatus, contentLength, contentType,
lastModified, entityID, uriparam)) {
return NS_ERROR_UNEXPECTED;
}
return NS_OK;
}
NS_IMETHODIMP
FTPChannelParent::OnStopRequest(nsIRequest* aRequest,
nsISupports* aContext,
nsresult aStatusCode)
{
LOG(("FTPChannelParent::OnStopRequest: [this=%p status=%ul]\n",
this, aStatusCode));
if (mDivertingFromChild) {
MOZ_RELEASE_ASSERT(mDivertToListener,
"Cannot divert if listener is unset!");
return mDivertToListener->OnStopRequest(aRequest, aContext, aStatusCode);
}
if (mIPCClosed || !SendOnStopRequest(aStatusCode)) {
return NS_ERROR_UNEXPECTED;
}
return NS_OK;
}
//-----------------------------------------------------------------------------
// FTPChannelParent::nsIStreamListener
//-----------------------------------------------------------------------------
NS_IMETHODIMP
FTPChannelParent::OnDataAvailable(nsIRequest* aRequest,
nsISupports* aContext,
nsIInputStream* aInputStream,
uint64_t aOffset,
uint32_t aCount)
{
LOG(("FTPChannelParent::OnDataAvailable [this=%p]\n", this));
if (mDivertingFromChild) {
MOZ_RELEASE_ASSERT(mDivertToListener,
"Cannot divert if listener is unset!");
return mDivertToListener->OnDataAvailable(aRequest, aContext, aInputStream,
aOffset, aCount);
}
nsCString data;
nsresult rv = NS_ReadInputStreamToString(aInputStream, data, aCount);
if (NS_FAILED(rv))
return rv;
if (mIPCClosed || !SendOnDataAvailable(mStatus, data, aOffset, aCount))
return NS_ERROR_UNEXPECTED;
return NS_OK;
}
//-----------------------------------------------------------------------------
// FTPChannelParent::nsIParentChannel
//-----------------------------------------------------------------------------
NS_IMETHODIMP
FTPChannelParent::SetParentListener(HttpChannelParentListener* aListener)
{
// Do not need ptr to HttpChannelParentListener.
return NS_OK;
}
NS_IMETHODIMP
FTPChannelParent::NotifyTrackingProtectionDisabled()
{
// One day, this should probably be filled in.
return NS_OK;
}
NS_IMETHODIMP
FTPChannelParent::Delete()
{
if (mIPCClosed || !SendDeleteSelf())
return NS_ERROR_UNEXPECTED;
return NS_OK;
}
//-----------------------------------------------------------------------------
// FTPChannelParent::nsIInterfaceRequestor
//-----------------------------------------------------------------------------
NS_IMETHODIMP
FTPChannelParent::GetInterface(const nsIID& uuid, void** result)
{
// Only support nsILoadContext if child channel's callbacks did too
if (uuid.Equals(NS_GET_IID(nsILoadContext)) && mLoadContext) {
nsCOMPtr<nsILoadContext> copy = mLoadContext;
copy.forget(result);
return NS_OK;
}
return QueryInterface(uuid, result);
}
//-----------------------------------------------------------------------------
// FTPChannelParent::ADivertableParentChannel
//-----------------------------------------------------------------------------
nsresult
FTPChannelParent::SuspendForDiversion()
{
MOZ_ASSERT(mChannel);
if (NS_WARN_IF(mDivertingFromChild)) {
MOZ_ASSERT(!mDivertingFromChild, "Already suspended for diversion!");
return NS_ERROR_UNEXPECTED;
}
// Try suspending the channel. Allow it to fail, since OnStopRequest may have
// been called and thus the channel may not be pending.
nsresult rv = mChannel->Suspend();
MOZ_ASSERT(NS_SUCCEEDED(rv) || rv == NS_ERROR_NOT_AVAILABLE);
mSuspendedForDiversion = NS_SUCCEEDED(rv);
// Once this is set, no more OnStart/OnData/OnStop callbacks should be sent
// to the child.
mDivertingFromChild = true;
return NS_OK;
}
/* private, supporting function for ADivertableParentChannel */
nsresult
FTPChannelParent::ResumeForDiversion()
{
MOZ_ASSERT(mChannel);
MOZ_ASSERT(mDivertToListener);
if (NS_WARN_IF(!mDivertingFromChild)) {
MOZ_ASSERT(mDivertingFromChild,
"Cannot ResumeForDiversion if not diverting!");
return NS_ERROR_UNEXPECTED;
}
if (mSuspendedForDiversion) {
nsresult rv = mChannel->Resume();
if (NS_WARN_IF(NS_FAILED(rv))) {
FailDiversion(NS_ERROR_UNEXPECTED, true);
return rv;
}
mSuspendedForDiversion = false;
}
// Delete() will tear down IPDL, but ref from underlying nsFTPChannel will
// keep us alive if there's more data to be delivered to listener.
if (NS_WARN_IF(NS_FAILED(Delete()))) {
FailDiversion(NS_ERROR_UNEXPECTED);
return NS_ERROR_UNEXPECTED;
}
return NS_OK;
}
void
FTPChannelParent::DivertTo(nsIStreamListener *aListener)
{
MOZ_ASSERT(aListener);
if (NS_WARN_IF(!mDivertingFromChild)) {
MOZ_ASSERT(mDivertingFromChild,
"Cannot DivertTo new listener if diverting is not set!");
return;
}
if (NS_WARN_IF(mIPCClosed || !SendFlushedForDiversion())) {
FailDiversion(NS_ERROR_UNEXPECTED);
return;
}
mDivertToListener = aListener;
// Call OnStartRequest and SendDivertMessages asynchronously to avoid
// reentering client context.
NS_DispatchToCurrentThread(
NS_NewRunnableMethod(this, &FTPChannelParent::StartDiversion));
return;
}
void
FTPChannelParent::StartDiversion()
{
if (NS_WARN_IF(!mDivertingFromChild)) {
MOZ_ASSERT(mDivertingFromChild,
"Cannot StartDiversion if diverting is not set!");
return;
}
// Fake pending status in case OnStopRequest has already been called.
if (mChannel) {
nsCOMPtr<nsIForcePendingChannel> forcePendingIChan = do_QueryInterface(mChannel);
if (forcePendingIChan) {
forcePendingIChan->ForcePending(true);
}
}
// Call OnStartRequest for the "DivertTo" listener.
nsresult rv = OnStartRequest(mChannel, nullptr);
if (NS_FAILED(rv)) {
if (mChannel) {
mChannel->Cancel(rv);
}
mStatus = rv;
return;
}
// After OnStartRequest has been called, tell FTPChannelChild to divert the
// OnDataAvailables and OnStopRequest to this FTPChannelParent.
if (NS_WARN_IF(mIPCClosed || !SendDivertMessages())) {
FailDiversion(NS_ERROR_UNEXPECTED);
return;
}
}
class FTPFailDiversionEvent : public nsRunnable
{
public:
FTPFailDiversionEvent(FTPChannelParent *aChannelParent,
nsresult aErrorCode,
bool aSkipResume)
: mChannelParent(aChannelParent)
, mErrorCode(aErrorCode)
, mSkipResume(aSkipResume)
{
MOZ_RELEASE_ASSERT(aChannelParent);
MOZ_RELEASE_ASSERT(NS_FAILED(aErrorCode));
}
NS_IMETHOD Run()
{
mChannelParent->NotifyDiversionFailed(mErrorCode, mSkipResume);
return NS_OK;
}
private:
nsRefPtr<FTPChannelParent> mChannelParent;
nsresult mErrorCode;
bool mSkipResume;
};
void
FTPChannelParent::FailDiversion(nsresult aErrorCode,
bool aSkipResume)
{
MOZ_RELEASE_ASSERT(NS_FAILED(aErrorCode));
MOZ_RELEASE_ASSERT(mDivertingFromChild);
MOZ_RELEASE_ASSERT(mDivertToListener);
MOZ_RELEASE_ASSERT(mChannel);
NS_DispatchToCurrentThread(
new FTPFailDiversionEvent(this, aErrorCode, aSkipResume));
}
void
FTPChannelParent::NotifyDiversionFailed(nsresult aErrorCode,
bool aSkipResume)
{
MOZ_RELEASE_ASSERT(NS_FAILED(aErrorCode));
MOZ_RELEASE_ASSERT(mDivertingFromChild);
MOZ_RELEASE_ASSERT(mDivertToListener);
MOZ_RELEASE_ASSERT(mChannel);
mChannel->Cancel(aErrorCode);
nsCOMPtr<nsIForcePendingChannel> forcePendingIChan = do_QueryInterface(mChannel);
if (forcePendingIChan) {
forcePendingIChan->ForcePending(false);
}
bool isPending = false;
nsresult rv = mChannel->IsPending(&isPending);
MOZ_RELEASE_ASSERT(NS_SUCCEEDED(rv));
// Resume only we suspended earlier.
if (mSuspendedForDiversion) {
mChannel->Resume();
}
// Channel has already sent OnStartRequest to the child, so ensure that we
// call it here if it hasn't already been called.
if (!mDivertedOnStartRequest) {
nsCOMPtr<nsIForcePendingChannel> forcePendingIChan = do_QueryInterface(mChannel);
if (forcePendingIChan) {
forcePendingIChan->ForcePending(true);
}
mDivertToListener->OnStartRequest(mChannel, nullptr);
if (forcePendingIChan) {
forcePendingIChan->ForcePending(false);
}
}
// If the channel is pending, it will call OnStopRequest itself; otherwise, do
// it here.
if (!isPending) {
mDivertToListener->OnStopRequest(mChannel, nullptr, aErrorCode);
}
mDivertToListener = nullptr;
mChannel = nullptr;
if (!mIPCClosed) {
unused << SendDeleteSelf();
}
}
void
FTPChannelParent::OfflineDisconnect()
{
if (mChannel) {
mChannel->Cancel(NS_ERROR_OFFLINE);
}
mStatus = NS_ERROR_OFFLINE;
}
uint32_t
FTPChannelParent::GetAppId()
{
uint32_t appId = NECKO_UNKNOWN_APP_ID;
if (mLoadContext) {
mLoadContext->GetAppId(&appId);
}
return appId;
}
//-----------------------------------------------------------------------------
// FTPChannelParent::nsIChannelEventSink
//-----------------------------------------------------------------------------
NS_IMETHODIMP
FTPChannelParent::AsyncOnChannelRedirect(
nsIChannel *oldChannel,
nsIChannel *newChannel,
uint32_t redirectFlags,
nsIAsyncVerifyRedirectCallback* callback)
{
nsCOMPtr<nsIFTPChannel> ftpChan = do_QueryInterface(newChannel);
if (!ftpChan) {
// when FTP is set to use HTTP proxying, we wind up getting redirected to an HTTP channel.
nsCOMPtr<nsIHttpChannel> httpChan = do_QueryInterface(newChannel);
if (!httpChan)
return NS_ERROR_UNEXPECTED;
}
mChannel = newChannel;
callback->OnRedirectVerifyCallback(NS_OK);
return NS_OK;
}
//---------------------
} // namespace net
} // namespace mozilla