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/* -*- Mode: C++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 8 -*- */
/* 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/plugins/BrowserStreamChild.h"
#include "mozilla/Attributes.h"
#include "mozilla/plugins/PluginInstanceChild.h"
#include "mozilla/plugins/StreamNotifyChild.h"
namespace mozilla::plugins {
BrowserStreamChild::BrowserStreamChild(PluginInstanceChild* instance,
const nsCString& url,
const uint32_t& length,
const uint32_t& lastmodified,
StreamNotifyChild* notifyData,
const nsCString& headers)
: mInstance(instance),
mStreamStatus(kStreamOpen),
mDestroyPending(NOT_DESTROYED),
mNotifyPending(false),
mInstanceDying(false),
mState(CONSTRUCTING),
mURL(url),
mHeaders(headers),
mStreamNotify(notifyData),
mDeliveryTracker(this) {
PLUGIN_LOG_DEBUG(("%s (%s, %i, %i, %p, %s)", FULLFUNCTION, url.get(), length,
lastmodified, (void*)notifyData, headers.get()));
AssertPluginThread();
memset(&mStream, 0, sizeof(mStream));
mStream.ndata = static_cast<AStream*>(this);
mStream.url = NullableStringGet(mURL);
mStream.end = length;
mStream.lastmodified = lastmodified;
mStream.headers = NullableStringGet(mHeaders);
if (notifyData) {
mStream.notifyData = notifyData->mClosure;
notifyData->SetAssociatedStream(this);
}
}
NPError BrowserStreamChild::StreamConstructed(const nsCString& mimeType,
const bool& seekable,
uint16_t* stype) {
NPError rv = NPERR_NO_ERROR;
*stype = NP_NORMAL;
rv = mInstance->mPluginIface->newstream(
&mInstance->mData, const_cast<char*>(NullableStringGet(mimeType)),
&mStream, seekable, stype);
// NP_NORMAL is the only permissible stream type
if (*stype != NP_NORMAL) {
rv = NPERR_INVALID_PARAM;
// The plugin thinks the stream is alive, so we kill it explicitly
(void)mInstance->mPluginIface->destroystream(&mInstance->mData, &mStream,
NPRES_NETWORK_ERR);
}
if (rv != NPERR_NO_ERROR) {
mState = DELETING;
if (mStreamNotify) {
mStreamNotify->SetAssociatedStream(nullptr);
mStreamNotify = nullptr;
}
} else {
mState = ALIVE;
}
return rv;
}
BrowserStreamChild::~BrowserStreamChild() {
NS_ASSERTION(!mStreamNotify, "Should have nulled it by now!");
}
mozilla::ipc::IPCResult BrowserStreamChild::RecvWrite(const int32_t& offset,
const uint32_t& newlength,
const Buffer& data) {
PLUGIN_LOG_DEBUG_FUNCTION;
AssertPluginThread();
if (ALIVE != mState)
MOZ_CRASH("Unexpected state: received data after NPP_DestroyStream?");
if (kStreamOpen != mStreamStatus) return IPC_OK();
mStream.end = newlength;
NS_ASSERTION(data.Length() > 0, "Empty data");
PendingData* newdata = mPendingData.AppendElement();
newdata->offset = offset;
newdata->data = data;
newdata->curpos = 0;
EnsureDeliveryPending();
return IPC_OK();
}
mozilla::ipc::IPCResult BrowserStreamChild::RecvNPP_DestroyStream(
const NPReason& reason) {
PLUGIN_LOG_DEBUG_METHOD;
if (ALIVE != mState)
MOZ_CRASH("Unexpected state: recevied NPP_DestroyStream twice?");
mState = DYING;
mDestroyPending = DESTROY_PENDING;
if (NPRES_DONE != reason) mStreamStatus = reason;
EnsureDeliveryPending();
return IPC_OK();
}
mozilla::ipc::IPCResult BrowserStreamChild::Recv__delete__() {
AssertPluginThread();
if (DELETING != mState) MOZ_CRASH("Bad state, not DELETING");
return IPC_OK();
}
void BrowserStreamChild::EnsureDeliveryPending() {
MessageLoop::current()->PostTask(
mDeliveryTracker.NewRunnableMethod(&BrowserStreamChild::Deliver));
}
void BrowserStreamChild::Deliver() {
while (kStreamOpen == mStreamStatus && mPendingData.Length()) {
if (DeliverPendingData() && kStreamOpen == mStreamStatus) {
SetSuspendedTimer();
return;
}
}
ClearSuspendedTimer();
NS_ASSERTION(kStreamOpen != mStreamStatus || 0 == mPendingData.Length(),
"Exit out of the data-delivery loop with pending data");
mPendingData.Clear();
if (DESTROY_PENDING == mDestroyPending) {
mDestroyPending = DESTROYED;
if (mState != DYING) MOZ_CRASH("mDestroyPending but state not DYING");
NS_ASSERTION(NPRES_DONE != mStreamStatus, "Success status set too early!");
if (kStreamOpen == mStreamStatus) mStreamStatus = NPRES_DONE;
(void)mInstance->mPluginIface->destroystream(&mInstance->mData, &mStream,
mStreamStatus);
}
if (DESTROYED == mDestroyPending && mNotifyPending) {
NS_ASSERTION(mStreamNotify, "mDestroyPending but no mStreamNotify?");
mNotifyPending = false;
mStreamNotify->NPP_URLNotify(mStreamStatus);
delete mStreamNotify;
mStreamNotify = nullptr;
}
if (DYING == mState && DESTROYED == mDestroyPending && !mStreamNotify &&
!mInstanceDying) {
SendStreamDestroyed();
mState = DELETING;
}
}
bool BrowserStreamChild::DeliverPendingData() {
if (mState != ALIVE && mState != DYING) MOZ_CRASH("Unexpected state");
NS_ASSERTION(mPendingData.Length(), "Called from Deliver with empty pending");
while (mPendingData[0].curpos <
static_cast<int32_t>(mPendingData[0].data.Length())) {
int32_t r =
mInstance->mPluginIface->writeready(&mInstance->mData, &mStream);
if (kStreamOpen != mStreamStatus) return false;
if (0 == r) // plugin wants to suspend delivery
return true;
r = mInstance->mPluginIface->write(
&mInstance->mData, &mStream,
mPendingData[0].offset + mPendingData[0].curpos, // offset
mPendingData[0].data.Length() - mPendingData[0].curpos, // length
const_cast<char*>(mPendingData[0].data.BeginReading() +
mPendingData[0].curpos));
if (kStreamOpen != mStreamStatus) return false;
if (0 == r) return true;
if (r < 0) { // error condition
mStreamStatus = NPRES_NETWORK_ERR;
// Set up stream destruction
EnsureDeliveryPending();
return false;
}
mPendingData[0].curpos += r;
}
mPendingData.RemoveElementAt(0);
return false;
}
void BrowserStreamChild::SetSuspendedTimer() {
if (mSuspendedTimer.IsRunning()) return;
mSuspendedTimer.Start(base::TimeDelta::FromMilliseconds(
100), // 100ms copied from Mozilla plugin host
this, &BrowserStreamChild::Deliver);
}
void BrowserStreamChild::ClearSuspendedTimer() { mSuspendedTimer.Stop(); }
} // namespace mozilla::plugins
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