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gecko-dev
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gecko-dev/dom/fetch/Response.cpp

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 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 "Response.h"
#include "nsISupportsImpl.h"
#include "nsIURI.h"
#include "nsNetUtil.h"
#include "nsPIDOMWindow.h"
#include "mozilla/BasePrincipal.h"
#include "mozilla/ErrorResult.h"
#include "mozilla/HoldDropJSObjects.h"
#include "mozilla/dom/BodyStream.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/FetchBinding.h"
#include "mozilla/dom/ResponseBinding.h"
#include "mozilla/dom/Headers.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/dom/URL.h"
#include "mozilla/dom/WorkerPrivate.h"
#include "nsDOMString.h"
#include "BodyExtractor.h"
#include "FetchStreamReader.h"
#include "InternalResponse.h"
namespace mozilla::dom {
NS_IMPL_ADDREF_INHERITED(Response, FetchBody<Response>)
NS_IMPL_RELEASE_INHERITED(Response, FetchBody<Response>)
NS_IMPL_CYCLE_COLLECTION_CLASS(Response)
NS_IMPL_CYCLE_COLLECTION_UNLINK_BEGIN_INHERITED(Response, FetchBody<Response>)
AbortFollower::Unlink(static_cast<AbortFollower*>(tmp));
NS_IMPL_CYCLE_COLLECTION_UNLINK(mOwner)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mHeaders)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mSignalImpl)
NS_IMPL_CYCLE_COLLECTION_UNLINK(mFetchStreamReader)
tmp->mReadableStreamBody = nullptr;
tmp->mReadableStreamReader = nullptr;
NS_IMPL_CYCLE_COLLECTION_UNLINK_PRESERVED_WRAPPER
NS_IMPL_CYCLE_COLLECTION_UNLINK_END
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(Response, FetchBody<Response>)
AbortFollower::Traverse(static_cast<AbortFollower*>(tmp), cb);
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mOwner)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mHeaders)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mSignalImpl)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE(mFetchStreamReader)
NS_IMPL_CYCLE_COLLECTION_TRAVERSE_END
NS_IMPL_CYCLE_COLLECTION_TRACE_BEGIN_INHERITED(Response, FetchBody<Response>)
NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mReadableStreamBody)
NS_IMPL_CYCLE_COLLECTION_TRACE_JS_MEMBER_CALLBACK(mReadableStreamReader)
NS_IMPL_CYCLE_COLLECTION_TRACE_PRESERVED_WRAPPER
NS_IMPL_CYCLE_COLLECTION_TRACE_END
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Response)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_END_INHERITING(FetchBody<Response>)
Response::Response(nsIGlobalObject* aGlobal,
InternalResponse* aInternalResponse,
AbortSignalImpl* aSignalImpl)
: FetchBody<Response>(aGlobal),
mInternalResponse(aInternalResponse),
mSignalImpl(aSignalImpl) {
MOZ_ASSERT(
aInternalResponse->Headers()->Guard() == HeadersGuardEnum::Immutable ||
aInternalResponse->Headers()->Guard() == HeadersGuardEnum::Response);
SetMimeType();
mozilla::HoldJSObjects(this);
}
Response::~Response() { mozilla::DropJSObjects(this); }
/* static */
already_AddRefed<Response> Response::Error(const GlobalObject& aGlobal) {
nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aGlobal.GetAsSupports());
RefPtr<InternalResponse> error =
InternalResponse::NetworkError(NS_ERROR_FAILURE);
RefPtr<Response> r = new Response(global, error, nullptr);
return r.forget();
}
/* static */
already_AddRefed<Response> Response::Redirect(const GlobalObject& aGlobal,
const nsAString& aUrl,
uint16_t aStatus,
ErrorResult& aRv) {
nsAutoString parsedURL;
if (NS_IsMainThread()) {
nsIURI* baseURI = nullptr;
nsCOMPtr<nsPIDOMWindowInner> inner(
do_QueryInterface(aGlobal.GetAsSupports()));
Document* doc = inner ? inner->GetExtantDoc() : nullptr;
if (doc) {
baseURI = doc->GetBaseURI();
}
// Don't use NS_ConvertUTF16toUTF8 because that doesn't let us handle OOM.
nsAutoCString url;
if (!AppendUTF16toUTF8(aUrl, url, fallible)) {
aRv.Throw(NS_ERROR_OUT_OF_MEMORY);
return nullptr;
}
nsCOMPtr<nsIURI> resolvedURI;
nsresult rv = NS_NewURI(getter_AddRefs(resolvedURI), url, nullptr, baseURI);
if (NS_WARN_IF(NS_FAILED(rv))) {
aRv.ThrowTypeError<MSG_INVALID_URL>(url);
return nullptr;
}
nsAutoCString spec;
rv = resolvedURI->GetSpec(spec);
if (NS_WARN_IF(NS_FAILED(rv))) {
aRv.ThrowTypeError<MSG_INVALID_URL>(url);
return nullptr;
}
CopyUTF8toUTF16(spec, parsedURL);
} else {
WorkerPrivate* worker = GetCurrentThreadWorkerPrivate();
MOZ_ASSERT(worker);
worker->AssertIsOnWorkerThread();
NS_ConvertUTF8toUTF16 baseURL(worker->GetLocationInfo().mHref);
RefPtr<URL> url =
URL::Constructor(aGlobal.GetAsSupports(), aUrl, baseURL, aRv);
if (aRv.Failed()) {
return nullptr;
}
url->GetHref(parsedURL);
}
if (aStatus != 301 && aStatus != 302 && aStatus != 303 && aStatus != 307 &&
aStatus != 308) {
aRv.ThrowRangeError("Invalid redirect status code.");
return nullptr;
}
// We can't just pass nullptr for our null-valued Nullable, because the
// fetch::ResponseBodyInit is a non-temporary type due to the MOZ_RAII
// annotations on some of its members.
Nullable<fetch::ResponseBodyInit> body;
ResponseInit init;
init.mStatus = aStatus;
init.mStatusText.AssignASCII("");
RefPtr<Response> r = Response::Constructor(aGlobal, body, init, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
r->GetInternalHeaders()->Set("Location"_ns, NS_ConvertUTF16toUTF8(parsedURL),
aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
r->GetInternalHeaders()->SetGuard(HeadersGuardEnum::Immutable, aRv);
MOZ_ASSERT(!aRv.Failed());
return r.forget();
}
/*static*/
already_AddRefed<Response> Response::Constructor(
const GlobalObject& aGlobal, const Nullable<fetch::ResponseBodyInit>& aBody,
const ResponseInit& aInit, ErrorResult& aRv) {
nsCOMPtr<nsIGlobalObject> global = do_QueryInterface(aGlobal.GetAsSupports());
if (NS_WARN_IF(!global)) {
aRv.Throw(NS_ERROR_DOM_INVALID_STATE_ERR);
return nullptr;
}
if (aInit.mStatus < 200 || aInit.mStatus > 599) {
aRv.ThrowRangeError("Invalid response status code.");
return nullptr;
}
// Check if the status text contains illegal characters
nsACString::const_iterator start, end;
aInit.mStatusText.BeginReading(start);
aInit.mStatusText.EndReading(end);
if (FindCharInReadable('\r', start, end)) {
aRv.ThrowTypeError<MSG_RESPONSE_INVALID_STATUSTEXT_ERROR>();
return nullptr;
}
// Reset iterator since FindCharInReadable advances it.
aInit.mStatusText.BeginReading(start);
if (FindCharInReadable('\n', start, end)) {
aRv.ThrowTypeError<MSG_RESPONSE_INVALID_STATUSTEXT_ERROR>();
return nullptr;
}
RefPtr<InternalResponse> internalResponse =
new InternalResponse(aInit.mStatus, aInit.mStatusText);
UniquePtr<mozilla::ipc::PrincipalInfo> principalInfo;
// Grab a valid channel info from the global so this response is 'valid' for
// interception.
if (NS_IsMainThread()) {
ChannelInfo info;
nsCOMPtr<nsPIDOMWindowInner> window = do_QueryInterface(global);
if (window) {
Document* doc = window->GetExtantDoc();
MOZ_ASSERT(doc);
info.InitFromDocument(doc);
principalInfo.reset(new mozilla::ipc::PrincipalInfo());
nsresult rv =
PrincipalToPrincipalInfo(doc->NodePrincipal(), principalInfo.get());
if (NS_WARN_IF(NS_FAILED(rv))) {
aRv.ThrowTypeError<MSG_FETCH_BODY_CONSUMED_ERROR>();
return nullptr;
}
internalResponse->InitChannelInfo(info);
} else if (global->PrincipalOrNull()->IsSystemPrincipal()) {
info.InitFromChromeGlobal(global);
internalResponse->InitChannelInfo(info);
}
/**
* The channel info is left uninitialized if neither the above `if` nor
* `else if` statements are executed; this could be because we're in a
* WebExtensions content script, where the global (i.e. `global`) is a
* wrapper, and the principal is an expanded principal. In this case,
* as far as I can tell, there's no way to get the security info, but we'd
* like the `Response` to be successfully constructed.
*/
} else {
WorkerPrivate* worker = GetCurrentThreadWorkerPrivate();
MOZ_ASSERT(worker);
internalResponse->InitChannelInfo(worker->GetChannelInfo());
principalInfo =
MakeUnique<mozilla::ipc::PrincipalInfo>(worker->GetPrincipalInfo());
}
internalResponse->SetPrincipalInfo(std::move(principalInfo));
RefPtr<Response> r = new Response(global, internalResponse, nullptr);
if (aInit.mHeaders.WasPassed()) {
internalResponse->Headers()->Clear();
// Instead of using Fill, create an object to allow the constructor to
// unwrap the HeadersInit.
RefPtr<Headers> headers =
Headers::Create(global, aInit.mHeaders.Value(), aRv);
if (aRv.Failed()) {
return nullptr;
}
internalResponse->Headers()->Fill(*headers->GetInternalHeaders(), aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
}
if (!aBody.IsNull()) {
if (aInit.mStatus == 204 || aInit.mStatus == 205 || aInit.mStatus == 304) {
aRv.ThrowTypeError("Response body is given with a null body status.");
return nullptr;
}
nsCString contentTypeWithCharset;
nsCOMPtr<nsIInputStream> bodyStream;
int64_t bodySize = InternalResponse::UNKNOWN_BODY_SIZE;
const fetch::ResponseBodyInit& body = aBody.Value();
if (body.IsReadableStream()) {
aRv.MightThrowJSException();
JSContext* cx = aGlobal.Context();
const ReadableStream& readableStream = body.GetAsReadableStream();
JS::Rooted<JSObject*> readableStreamObj(cx, readableStream.Obj());
bool disturbed;
bool locked;
if (!JS::ReadableStreamIsDisturbed(cx, readableStreamObj, &disturbed) ||
!JS::ReadableStreamIsLocked(cx, readableStreamObj, &locked)) {
aRv.StealExceptionFromJSContext(cx);
return nullptr;
}
if (disturbed || locked) {
aRv.ThrowTypeError<MSG_FETCH_BODY_CONSUMED_ERROR>();
return nullptr;
}
r->SetReadableStreamBody(cx, readableStreamObj);
JS::ReadableStreamMode streamMode;
if (!JS::ReadableStreamGetMode(cx, readableStreamObj, &streamMode)) {
aRv.StealExceptionFromJSContext(cx);
return nullptr;
}
if (streamMode == JS::ReadableStreamMode::ExternalSource) {
// If this is a DOM generated ReadableStream, we can extract the
// inputStream directly.
JS::ReadableStreamUnderlyingSource* underlyingSource = nullptr;
if (!JS::ReadableStreamGetExternalUnderlyingSource(
cx, readableStreamObj, &underlyingSource)) {
aRv.StealExceptionFromJSContext(cx);
return nullptr;
}
MOZ_ASSERT(underlyingSource);
aRv = BodyStream::RetrieveInputStream(underlyingSource,
getter_AddRefs(bodyStream));
// The releasing of the external source is needed in order to avoid an
// extra stream lock.
if (!JS::ReadableStreamReleaseExternalUnderlyingSource(
cx, readableStreamObj)) {
aRv.StealExceptionFromJSContext(cx);
return nullptr;
}
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
} else {
// If this is a JS-created ReadableStream, let's create a
// FetchStreamReader.
aRv = FetchStreamReader::Create(aGlobal.Context(), global,
getter_AddRefs(r->mFetchStreamReader),
getter_AddRefs(bodyStream));
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
}
} else {
uint64_t size = 0;
aRv = ExtractByteStreamFromBody(body, getter_AddRefs(bodyStream),
contentTypeWithCharset, size);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
bodySize = size;
}
internalResponse->SetBody(bodyStream, bodySize);
if (!contentTypeWithCharset.IsVoid() &&
!internalResponse->Headers()->Has("Content-Type"_ns, aRv)) {
// Ignore Append() failing here.
ErrorResult error;
internalResponse->Headers()->Append("Content-Type"_ns,
contentTypeWithCharset, error);
error.SuppressException();
}
if (aRv.Failed()) {
return nullptr;
}
}
r->SetMimeType();
return r.forget();
}
already_AddRefed<Response> Response::Clone(JSContext* aCx, ErrorResult& aRv) {
bool bodyUsed = GetBodyUsed(aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
if (!bodyUsed && mReadableStreamBody) {
aRv.MightThrowJSException();
AutoJSAPI jsapi;
if (!jsapi.Init(mOwner)) {
aRv.Throw(NS_ERROR_FAILURE);
return nullptr;
}
JSContext* cx = jsapi.cx();
JS::Rooted<JSObject*> body(cx, mReadableStreamBody);
bool locked;
// We just need to check the 'locked' state because GetBodyUsed() already
// checked the 'disturbed' state.
if (!JS::ReadableStreamIsLocked(cx, body, &locked)) {
aRv.StealExceptionFromJSContext(cx);
return nullptr;
}
bodyUsed = locked;
}
if (bodyUsed) {
aRv.ThrowTypeError<MSG_FETCH_BODY_CONSUMED_ERROR>();
return nullptr;
}
RefPtr<FetchStreamReader> streamReader;
nsCOMPtr<nsIInputStream> inputStream;
JS::Rooted<JSObject*> body(aCx);
MaybeTeeReadableStreamBody(aCx, &body, getter_AddRefs(streamReader),
getter_AddRefs(inputStream), aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
MOZ_ASSERT_IF(body, streamReader);
MOZ_ASSERT_IF(body, inputStream);
RefPtr<InternalResponse> ir =
mInternalResponse->Clone(body ? InternalResponse::eDontCloneInputStream
: InternalResponse::eCloneInputStream);
RefPtr<Response> response = new Response(mOwner, ir, GetSignalImpl());
if (body) {
// Maybe we have a body, but we receive null from MaybeTeeReadableStreamBody
// if this body is a native stream. In this case the InternalResponse will
// have a clone of the native body and the ReadableStream will be created
// lazily if needed.
response->SetReadableStreamBody(aCx, body);
response->mFetchStreamReader = streamReader;
ir->SetBody(inputStream, InternalResponse::UNKNOWN_BODY_SIZE);
}
return response.forget();
}
already_AddRefed<Response> Response::CloneUnfiltered(JSContext* aCx,
ErrorResult& aRv) {
if (GetBodyUsed(aRv)) {
aRv.ThrowTypeError<MSG_FETCH_BODY_CONSUMED_ERROR>();
return nullptr;
}
RefPtr<FetchStreamReader> streamReader;
nsCOMPtr<nsIInputStream> inputStream;
JS::Rooted<JSObject*> body(aCx);
MaybeTeeReadableStreamBody(aCx, &body, getter_AddRefs(streamReader),
getter_AddRefs(inputStream), aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
MOZ_ASSERT_IF(body, streamReader);
MOZ_ASSERT_IF(body, inputStream);
RefPtr<InternalResponse> clone =
mInternalResponse->Clone(body ? InternalResponse::eDontCloneInputStream
: InternalResponse::eCloneInputStream);
RefPtr<InternalResponse> ir = clone->Unfiltered();
RefPtr<Response> ref = new Response(mOwner, ir, GetSignalImpl());
if (body) {
// Maybe we have a body, but we receive null from MaybeTeeReadableStreamBody
// if this body is a native stream. In this case the InternalResponse will
// have a clone of the native body and the ReadableStream will be created
// lazily if needed.
ref->SetReadableStreamBody(aCx, body);
ref->mFetchStreamReader = streamReader;
ir->SetBody(inputStream, InternalResponse::UNKNOWN_BODY_SIZE);
}
return ref.forget();
}
void Response::SetBody(nsIInputStream* aBody, int64_t aBodySize) {
MOZ_ASSERT(!CheckBodyUsed());
mInternalResponse->SetBody(aBody, aBodySize);
}
already_AddRefed<InternalResponse> Response::GetInternalResponse() const {
RefPtr<InternalResponse> ref = mInternalResponse;
return ref.forget();
}
Headers* Response::Headers_() {
if (!mHeaders) {
mHeaders = new Headers(mOwner, mInternalResponse->Headers());
}
return mHeaders;
}
} // namespace mozilla::dom
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