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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* 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/dom/UnderlyingSinkCallbackHelpers.h"
#include "StreamUtils.h"
#include "mozilla/dom/UnionTypes.h"
#include "mozilla/dom/WebTransportError.h"
#include "nsHttp.h"
using namespace mozilla::dom;
NS_IMPL_CYCLE_COLLECTION(UnderlyingSinkAlgorithmsBase)
NS_IMPL_CYCLE_COLLECTING_ADDREF(UnderlyingSinkAlgorithmsBase)
NS_IMPL_CYCLE_COLLECTING_RELEASE(UnderlyingSinkAlgorithmsBase)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(UnderlyingSinkAlgorithmsBase)
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
NS_IMPL_CYCLE_COLLECTION_INHERITED_WITH_JS_MEMBERS(
UnderlyingSinkAlgorithms, UnderlyingSinkAlgorithmsBase,
(mGlobal, mStartCallback, mWriteCallback, mCloseCallback, mAbortCallback),
(mUnderlyingSink))
NS_IMPL_ADDREF_INHERITED(UnderlyingSinkAlgorithms, UnderlyingSinkAlgorithmsBase)
NS_IMPL_RELEASE_INHERITED(UnderlyingSinkAlgorithms,
UnderlyingSinkAlgorithmsBase)
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(UnderlyingSinkAlgorithms)
NS_INTERFACE_MAP_END_INHERITING(UnderlyingSinkAlgorithmsBase)
void UnderlyingSinkAlgorithms::StartCallback(
JSContext* aCx, WritableStreamDefaultController& aController,
JS::MutableHandle<JS::Value> aRetVal, ErrorResult& aRv) {
if (!mStartCallback) {
// Step 2: Let startAlgorithm be an algorithm that returns undefined.
aRetVal.setUndefined();
return;
}
// Step 6: If underlyingSinkDict["start"] exists, then set startAlgorithm to
// an algorithm which returns the result of invoking
// underlyingSinkDict["start"] with argument list « controller » and callback
// this value underlyingSink.
JS::Rooted<JSObject*> thisObj(aCx, mUnderlyingSink);
return mStartCallback->Call(thisObj, aController, aRetVal, aRv,
"UnderlyingSink.start",
CallbackFunction::eRethrowExceptions);
}
already_AddRefed<Promise> UnderlyingSinkAlgorithms::WriteCallback(
JSContext* aCx, JS::Handle<JS::Value> aChunk,
WritableStreamDefaultController& aController, ErrorResult& aRv) {
if (!mWriteCallback) {
// Step 3: Let writeAlgorithm be an algorithm that returns a promise
// resolved with undefined.
return Promise::CreateResolvedWithUndefined(mGlobal, aRv);
}
// Step 7: If underlyingSinkDict["write"] exists, then set writeAlgorithm to
// an algorithm which takes an argument chunk and returns the result of
// invoking underlyingSinkDict["write"] with argument list « chunk, controller
// » and callback this value underlyingSink.
JS::Rooted<JSObject*> thisObj(aCx, mUnderlyingSink);
RefPtr<Promise> promise = mWriteCallback->Call(
thisObj, aChunk, aController, aRv, "UnderlyingSink.write",
CallbackFunction::eRethrowExceptions);
return promise.forget();
}
already_AddRefed<Promise> UnderlyingSinkAlgorithms::CloseCallback(
JSContext* aCx, ErrorResult& aRv) {
if (!mCloseCallback) {
// Step 4: Let closeAlgorithm be an algorithm that returns a promise
// resolved with undefined.
return Promise::CreateResolvedWithUndefined(mGlobal, aRv);
}
// Step 8: If underlyingSinkDict["close"] exists, then set closeAlgorithm to
// an algorithm which returns the result of invoking
// underlyingSinkDict["close"] with argument list «» and callback this value
// underlyingSink.
JS::Rooted<JSObject*> thisObj(aCx, mUnderlyingSink);
RefPtr<Promise> promise =
mCloseCallback->Call(thisObj, aRv, "UnderlyingSink.close",
CallbackFunction::eRethrowExceptions);
return promise.forget();
}
already_AddRefed<Promise> UnderlyingSinkAlgorithms::AbortCallback(
JSContext* aCx, const Optional<JS::Handle<JS::Value>>& aReason,
ErrorResult& aRv) {
if (!mAbortCallback) {
// Step 5: Let abortAlgorithm be an algorithm that returns a promise
// resolved with undefined.
return Promise::CreateResolvedWithUndefined(mGlobal, aRv);
}
// Step 9: Let abortAlgorithm be an algorithm that returns a promise resolved
// with undefined.
JS::Rooted<JSObject*> thisObj(aCx, mUnderlyingSink);
RefPtr<Promise> promise =
mAbortCallback->Call(thisObj, aReason, aRv, "UnderlyingSink.abort",
CallbackFunction::eRethrowExceptions);
return promise.forget();
}
// Step 2.1: Let closeAlgorithmWrapper be an algorithm that runs these steps:
already_AddRefed<Promise> UnderlyingSinkAlgorithmsWrapper::CloseCallback(
JSContext* aCx, ErrorResult& aRv) {
nsCOMPtr<nsIGlobalObject> global = xpc::CurrentNativeGlobal(aCx);
return PromisifyAlgorithm(
global, [&](ErrorResult& aRv) { return CloseCallbackImpl(aCx, aRv); },
aRv);
}
// Step 3.1: Let abortAlgorithmWrapper be an algorithm that runs these steps:
already_AddRefed<Promise> UnderlyingSinkAlgorithmsWrapper::AbortCallback(
JSContext* aCx, const Optional<JS::Handle<JS::Value>>& aReason,
ErrorResult& aRv) {
nsCOMPtr<nsIGlobalObject> global = xpc::CurrentNativeGlobal(aCx);
return PromisifyAlgorithm(
global,
[&](ErrorResult& aRv) { return AbortCallbackImpl(aCx, aReason, aRv); },
aRv);
}
NS_IMPL_ISUPPORTS_CYCLE_COLLECTION_INHERITED(WritableStreamToOutput,
UnderlyingSinkAlgorithmsBase,
nsIOutputStreamCallback)
NS_IMPL_CYCLE_COLLECTION_INHERITED(WritableStreamToOutput,
UnderlyingSinkAlgorithmsBase, mParent,
mOutput, mPromise)
NS_IMETHODIMP
WritableStreamToOutput::OnOutputStreamReady(nsIAsyncOutputStream* aStream) {
if (!mData) {
return NS_OK;
}
MOZ_ASSERT(mPromise);
uint32_t written = 0;
nsresult rv = mOutput->Write(
reinterpret_cast<const char*>(mData->Elements() + mWritten),
mData->Length() - mWritten, &written);
if (NS_FAILED(rv) && rv != NS_BASE_STREAM_WOULD_BLOCK) {
mPromise->MaybeRejectWithAbortError("Error writing to stream"_ns);
ClearData();
// XXX should we add mErrored and fail future calls immediately?
// I presume new calls to Write() will fail though, too
return rv;
}
if (NS_SUCCEEDED(rv)) {
mWritten += written;
MOZ_ASSERT(mWritten <= mData->Length());
if (mWritten >= mData->Length()) {
mPromise->MaybeResolveWithUndefined();
ClearData();
return NS_OK;
}
// more to write
}
// wrote partial or nothing
// Wait for space
nsCOMPtr<nsIEventTarget> target = mozilla::GetCurrentSerialEventTarget();
rv = mOutput->AsyncWait(this, 0, 0, target);
if (NS_FAILED(rv)) {
mPromise->MaybeRejectWithUnknownError("error waiting to write data");
ClearData();
// XXX should we add mErrored and fail future calls immediately?
// New calls to Write() will fail, note
// See step 5.2 of
return rv;
}
return NS_OK;
}
already_AddRefed<Promise> WritableStreamToOutput::WriteCallback(
JSContext* aCx, JS::Handle<JS::Value> aChunk,
WritableStreamDefaultController& aController, ErrorResult& aError) {
ArrayBufferViewOrArrayBuffer data;
if (!data.Init(aCx, aChunk)) {
aError.StealExceptionFromJSContext(aCx);
return nullptr;
}
// buffer/bufferView
MOZ_ASSERT(data.IsArrayBuffer() || data.IsArrayBufferView());
RefPtr<Promise> promise = Promise::Create(mParent, aError);
if (NS_WARN_IF(aError.Failed())) {
return nullptr;
}
// Try to write first, and only enqueue data if we were already blocked
// or the write didn't write it all. This avoids allocations and copies
// in common cases.
MOZ_ASSERT(!mPromise);
MOZ_ASSERT(mWritten == 0);
uint32_t written = 0;
ProcessTypedArraysFixed(data, [&](const Span<uint8_t>& aData) {
Span<uint8_t> dataSpan = aData;
nsresult rv = mOutput->Write(mozilla::AsChars(dataSpan).Elements(),
dataSpan.Length(), &written);
if (NS_FAILED(rv) && rv != NS_BASE_STREAM_WOULD_BLOCK) {
promise->MaybeRejectWithAbortError("error writing data");
return;
}
if (NS_SUCCEEDED(rv)) {
if (written == dataSpan.Length()) {
promise->MaybeResolveWithUndefined();
return;
}
dataSpan = dataSpan.From(written);
}
auto buffer = Buffer<uint8_t>::CopyFrom(dataSpan);
if (buffer.isNothing()) {
promise->MaybeReject(NS_ERROR_OUT_OF_MEMORY);
return;
}
mData = std::move(buffer);
});
if (promise->State() != Promise::PromiseState::Pending) {
return promise.forget();
}
mPromise = promise;
nsCOMPtr<nsIEventTarget> target = mozilla::GetCurrentSerialEventTarget();
nsresult rv = mOutput->AsyncWait(this, 0, 0, target);
if (NS_FAILED(rv)) {
ClearData();
promise->MaybeRejectWithUnknownError("error waiting to write data");
}
return promise.forget();
}
already_AddRefed<Promise> WritableStreamToOutput::AbortCallbackImpl(
JSContext* aCx, const Optional<JS::Handle<JS::Value>>& aReason,
ErrorResult& aRv) {
// Step 3. Let abortAlgorithmWrapper be an algorithm that runs these steps:
if (aReason.WasPassed() && aReason.Value().isObject()) {
JS::Rooted<JSObject*> obj(aCx, &aReason.Value().toObject());
RefPtr<WebTransportError> error;
UnwrapObject<prototypes::id::WebTransportError, WebTransportError>(
obj, error, nullptr);
if (error) {
mOutput->CloseWithStatus(net::GetNSResultFromWebTransportError(
error->GetStreamErrorCode().Value()));
return nullptr;
}
}
// XXX The close or rather a dedicated abort should be async. For now we have
// to always fall back to the Step 3.3 below.
// XXX how do we know this stream is used by webtransport?
mOutput->CloseWithStatus(NS_ERROR_WEBTRANSPORT_CODE_BASE);
// Step 3.3. Return a promise resolved with undefined.
// Wrapper handles this
return nullptr;
}
void WritableStreamToOutput::ReleaseObjects() { mOutput->Close(); }