gecko-dev/dom/cache/Cache.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 "mozilla/dom/cache/Cache.h"
#include "mozilla/dom/Headers.h"
#include "mozilla/dom/InternalResponse.h"
#include "mozilla/dom/Promise.h"
#include "mozilla/dom/PromiseNativeHandler.h"
#include "mozilla/dom/Response.h"
#include "mozilla/dom/WorkerPrivate.h"
#include "mozilla/dom/CacheBinding.h"
#include "mozilla/dom/cache/AutoUtils.h"
#include "mozilla/dom/cache/CacheChild.h"
#include "mozilla/dom/cache/CacheWorkerHolder.h"
#include "mozilla/dom/cache/ReadStream.h"
#include "mozilla/ErrorResult.h"
#include "mozilla/Preferences.h"
#include "mozilla/Unused.h"
#include "nsIGlobalObject.h"
namespace mozilla {
namespace dom {
namespace cache {
using mozilla::dom::workers::GetCurrentThreadWorkerPrivate;
using mozilla::dom::workers::WorkerPrivate;
using mozilla::ipc::PBackgroundChild;
namespace {
bool
IsValidPutRequestURL(const nsAString& aUrl, ErrorResult& aRv)
{
bool validScheme = false;
// make a copy because ProcessURL strips the fragmet
NS_ConvertUTF16toUTF8 url(aUrl);
TypeUtils::ProcessURL(url, &validScheme, nullptr, nullptr, aRv);
if (aRv.Failed()) {
return false;
}
if (!validScheme) {
aRv.ThrowTypeError<MSG_INVALID_URL_SCHEME>(NS_LITERAL_STRING("Request"),
aUrl);
return false;
}
return true;
}
static bool
IsValidPutRequestMethod(const Request& aRequest, ErrorResult& aRv)
{
nsAutoCString method;
aRequest.GetMethod(method);
if (!method.LowerCaseEqualsLiteral("get")) {
NS_ConvertASCIItoUTF16 label(method);
aRv.ThrowTypeError<MSG_INVALID_REQUEST_METHOD>(label);
return false;
}
return true;
}
static bool
IsValidPutRequestMethod(const RequestOrUSVString& aRequest, ErrorResult& aRv)
{
// If the provided request is a string URL, then it will default to
// a valid http method automatically.
if (!aRequest.IsRequest()) {
return true;
}
return IsValidPutRequestMethod(aRequest.GetAsRequest(), aRv);
}
} // namespace
// Helper class to wait for Add()/AddAll() fetch requests to complete and
// then perform a PutAll() with the responses. This class holds a WorkerHolder
// to keep the Worker thread alive. This is mainly to ensure that Add/AddAll
// act the same as other Cache operations that directly create a CacheOpChild
// actor.
class Cache::FetchHandler final : public PromiseNativeHandler
{
public:
FetchHandler(CacheWorkerHolder* aWorkerHolder, Cache* aCache,
nsTArray<RefPtr<Request>>&& aRequestList, Promise* aPromise)
: mWorkerHolder(aWorkerHolder)
, mCache(aCache)
, mRequestList(Move(aRequestList))
, mPromise(aPromise)
{
MOZ_ASSERT_IF(!NS_IsMainThread(), mWorkerHolder);
MOZ_ASSERT(mCache);
MOZ_ASSERT(mPromise);
}
virtual void
ResolvedCallback(JSContext* aCx, JS::Handle<JS::Value> aValue) override
{
NS_ASSERT_OWNINGTHREAD(FetchHandler);
// Stop holding the worker alive when we leave this method.
RefPtr<CacheWorkerHolder> workerHolder;
workerHolder.swap(mWorkerHolder);
// Promise::All() passed an array of fetch() Promises should give us
// an Array of Response objects. The following code unwraps these
// JS values back to an nsTArray<RefPtr<Response>>.
AutoTArray<RefPtr<Response>, 256> responseList;
responseList.SetCapacity(mRequestList.Length());
bool isArray;
if (NS_WARN_IF(!JS_IsArrayObject(aCx, aValue, &isArray) || !isArray)) {
Fail();
return;
}
JS::Rooted<JSObject*> obj(aCx, &aValue.toObject());
uint32_t length;
if (NS_WARN_IF(!JS_GetArrayLength(aCx, obj, &length))) {
Fail();
return;
}
for (uint32_t i = 0; i < length; ++i) {
JS::Rooted<JS::Value> value(aCx);
if (NS_WARN_IF(!JS_GetElement(aCx, obj, i, &value))) {
Fail();
return;
}
if (NS_WARN_IF(!value.isObject())) {
Fail();
return;
}
JS::Rooted<JSObject*> responseObj(aCx, &value.toObject());
RefPtr<Response> response;
nsresult rv = UNWRAP_OBJECT(Response, responseObj, response);
if (NS_WARN_IF(NS_FAILED(rv))) {
Fail();
return;
}
if (NS_WARN_IF(response->Type() == ResponseType::Error)) {
Fail();
return;
}
// Do not allow the convenience methods .add()/.addAll() to store failed
// responses. A consequence of this is that these methods cannot be
// used to store opaque or opaqueredirect responses since they always
// expose a 0 status value.
if (!response->Ok()) {
uint32_t t = static_cast<uint32_t>(response->Type());
NS_ConvertASCIItoUTF16 type(ResponseTypeValues::strings[t].value,
ResponseTypeValues::strings[t].length);
nsAutoString status;
status.AppendInt(response->Status());
nsAutoString url;
mRequestList[i]->GetUrl(url);
ErrorResult rv;
rv.ThrowTypeError<MSG_CACHE_ADD_FAILED_RESPONSE>(type, status, url);
// TODO: abort the fetch requests we have running (bug 1157434)
mPromise->MaybeReject(rv);
return;
}
responseList.AppendElement(Move(response));
}
MOZ_ASSERT(mRequestList.Length() == responseList.Length());
// Now store the unwrapped Response list in the Cache.
ErrorResult result;
RefPtr<Promise> put = mCache->PutAll(mRequestList, responseList, result);
if (NS_WARN_IF(result.Failed())) {
// TODO: abort the fetch requests we have running (bug 1157434)
mPromise->MaybeReject(result);
return;
}
// Chain the Cache::Put() promise to the original promise returned to
// the content script.
mPromise->MaybeResolve(put);
}
virtual void
RejectedCallback(JSContext* aCx, JS::Handle<JS::Value> aValue) override
{
NS_ASSERT_OWNINGTHREAD(FetchHandler);
Fail();
}
private:
~FetchHandler()
{
}
void
Fail()
{
ErrorResult rv;
rv.ThrowTypeError<MSG_FETCH_FAILED>();
mPromise->MaybeReject(rv);
}
RefPtr<CacheWorkerHolder> mWorkerHolder;
RefPtr<Cache> mCache;
nsTArray<RefPtr<Request>> mRequestList;
RefPtr<Promise> mPromise;
NS_DECL_ISUPPORTS
};
NS_IMPL_ISUPPORTS0(Cache::FetchHandler)
NS_IMPL_CYCLE_COLLECTING_ADDREF(mozilla::dom::cache::Cache);
NS_IMPL_CYCLE_COLLECTING_RELEASE(mozilla::dom::cache::Cache);
NS_IMPL_CYCLE_COLLECTION_WRAPPERCACHE(mozilla::dom::cache::Cache, mGlobal);
NS_INTERFACE_MAP_BEGIN_CYCLE_COLLECTION(Cache)
NS_WRAPPERCACHE_INTERFACE_MAP_ENTRY
NS_INTERFACE_MAP_ENTRY(nsISupports)
NS_INTERFACE_MAP_END
Cache::Cache(nsIGlobalObject* aGlobal, CacheChild* aActor)
: mGlobal(aGlobal)
, mActor(aActor)
{
MOZ_ASSERT(mGlobal);
MOZ_ASSERT(mActor);
mActor->SetListener(this);
}
already_AddRefed<Promise>
Cache::Match(const RequestOrUSVString& aRequest,
const CacheQueryOptions& aOptions, ErrorResult& aRv)
{
if (NS_WARN_IF(!mActor)) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
CacheChild::AutoLock actorLock(mActor);
RefPtr<InternalRequest> ir = ToInternalRequest(aRequest, IgnoreBody, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
CacheQueryParams params;
ToCacheQueryParams(params, aOptions);
AutoChildOpArgs args(this, CacheMatchArgs(CacheRequest(), params), 1);
args.Add(ir, IgnoreBody, IgnoreInvalidScheme, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
return ExecuteOp(args, aRv);
}
already_AddRefed<Promise>
Cache::MatchAll(const Optional<RequestOrUSVString>& aRequest,
const CacheQueryOptions& aOptions, ErrorResult& aRv)
{
if (NS_WARN_IF(!mActor)) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
CacheChild::AutoLock actorLock(mActor);
CacheQueryParams params;
ToCacheQueryParams(params, aOptions);
AutoChildOpArgs args(this, CacheMatchAllArgs(void_t(), params), 1);
if (aRequest.WasPassed()) {
RefPtr<InternalRequest> ir = ToInternalRequest(aRequest.Value(),
IgnoreBody, aRv);
if (aRv.Failed()) {
return nullptr;
}
args.Add(ir, IgnoreBody, IgnoreInvalidScheme, aRv);
if (aRv.Failed()) {
return nullptr;
}
}
return ExecuteOp(args, aRv);
}
already_AddRefed<Promise>
Cache::Add(JSContext* aContext, const RequestOrUSVString& aRequest,
ErrorResult& aRv)
{
if (NS_WARN_IF(!mActor)) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
CacheChild::AutoLock actorLock(mActor);
if (!IsValidPutRequestMethod(aRequest, aRv)) {
return nullptr;
}
GlobalObject global(aContext, mGlobal->GetGlobalJSObject());
MOZ_ASSERT(!global.Failed());
nsTArray<RefPtr<Request>> requestList(1);
RefPtr<Request> request = Request::Constructor(global, aRequest,
RequestInit(), aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
nsAutoString url;
request->GetUrl(url);
if (NS_WARN_IF(!IsValidPutRequestURL(url, aRv))) {
return nullptr;
}
requestList.AppendElement(Move(request));
return AddAll(global, Move(requestList), aRv);
}
already_AddRefed<Promise>
Cache::AddAll(JSContext* aContext,
const Sequence<OwningRequestOrUSVString>& aRequestList,
ErrorResult& aRv)
{
if (NS_WARN_IF(!mActor)) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
CacheChild::AutoLock actorLock(mActor);
GlobalObject global(aContext, mGlobal->GetGlobalJSObject());
MOZ_ASSERT(!global.Failed());
nsTArray<RefPtr<Request>> requestList(aRequestList.Length());
for (uint32_t i = 0; i < aRequestList.Length(); ++i) {
RequestOrUSVString requestOrString;
if (aRequestList[i].IsRequest()) {
requestOrString.SetAsRequest() = aRequestList[i].GetAsRequest();
if (NS_WARN_IF(!IsValidPutRequestMethod(requestOrString.GetAsRequest(),
aRv))) {
return nullptr;
}
} else {
requestOrString.SetAsUSVString().Rebind(
aRequestList[i].GetAsUSVString().Data(),
aRequestList[i].GetAsUSVString().Length());
}
RefPtr<Request> request = Request::Constructor(global, requestOrString,
RequestInit(), aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
nsAutoString url;
request->GetUrl(url);
if (NS_WARN_IF(!IsValidPutRequestURL(url, aRv))) {
return nullptr;
}
requestList.AppendElement(Move(request));
}
return AddAll(global, Move(requestList), aRv);
}
already_AddRefed<Promise>
Cache::Put(const RequestOrUSVString& aRequest, Response& aResponse,
ErrorResult& aRv)
{
if (NS_WARN_IF(!mActor)) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
CacheChild::AutoLock actorLock(mActor);
if (NS_WARN_IF(!IsValidPutRequestMethod(aRequest, aRv))) {
return nullptr;
}
RefPtr<InternalRequest> ir = ToInternalRequest(aRequest, ReadBody, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
AutoChildOpArgs args(this, CachePutAllArgs(), 1);
args.Add(ir, ReadBody, TypeErrorOnInvalidScheme,
aResponse, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
return ExecuteOp(args, aRv);
}
already_AddRefed<Promise>
Cache::Delete(const RequestOrUSVString& aRequest,
const CacheQueryOptions& aOptions, ErrorResult& aRv)
{
if (NS_WARN_IF(!mActor)) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
CacheChild::AutoLock actorLock(mActor);
RefPtr<InternalRequest> ir = ToInternalRequest(aRequest, IgnoreBody, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
CacheQueryParams params;
ToCacheQueryParams(params, aOptions);
AutoChildOpArgs args(this, CacheDeleteArgs(CacheRequest(), params), 1);
args.Add(ir, IgnoreBody, IgnoreInvalidScheme, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
return ExecuteOp(args, aRv);
}
already_AddRefed<Promise>
Cache::Keys(const Optional<RequestOrUSVString>& aRequest,
const CacheQueryOptions& aOptions, ErrorResult& aRv)
{
if (NS_WARN_IF(!mActor)) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
CacheChild::AutoLock actorLock(mActor);
CacheQueryParams params;
ToCacheQueryParams(params, aOptions);
AutoChildOpArgs args(this, CacheKeysArgs(void_t(), params), 1);
if (aRequest.WasPassed()) {
RefPtr<InternalRequest> ir = ToInternalRequest(aRequest.Value(),
IgnoreBody, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
args.Add(ir, IgnoreBody, IgnoreInvalidScheme, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
}
return ExecuteOp(args, aRv);
}
// static
bool
Cache::PrefEnabled(JSContext* aCx, JSObject* aObj)
{
using mozilla::dom::workers::WorkerPrivate;
using mozilla::dom::workers::GetWorkerPrivateFromContext;
// If we're on the main thread, then check the pref directly.
if (NS_IsMainThread()) {
bool enabled = false;
Preferences::GetBool("dom.caches.enabled", &enabled);
return enabled;
}
// Otherwise check the pref via the work private helper
WorkerPrivate* workerPrivate = GetWorkerPrivateFromContext(aCx);
if (!workerPrivate) {
return false;
}
return workerPrivate->DOMCachesEnabled();
}
nsISupports*
Cache::GetParentObject() const
{
return mGlobal;
}
JSObject*
Cache::WrapObject(JSContext* aContext, JS::Handle<JSObject*> aGivenProto)
{
return CacheBinding::Wrap(aContext, this, aGivenProto);
}
void
Cache::DestroyInternal(CacheChild* aActor)
{
MOZ_ASSERT(mActor);
MOZ_ASSERT(mActor == aActor);
mActor->ClearListener();
mActor = nullptr;
}
nsIGlobalObject*
Cache::GetGlobalObject() const
{
return mGlobal;
}
#ifdef DEBUG
void
Cache::AssertOwningThread() const
{
NS_ASSERT_OWNINGTHREAD(Cache);
}
#endif
PBackgroundChild*
Cache::GetIPCManager()
{
NS_ASSERT_OWNINGTHREAD(Cache);
MOZ_ASSERT(mActor);
return mActor->Manager();
}
Cache::~Cache()
{
NS_ASSERT_OWNINGTHREAD(Cache);
if (mActor) {
mActor->StartDestroyFromListener();
// DestroyInternal() is called synchronously by StartDestroyFromListener().
// So we should have already cleared the mActor.
MOZ_ASSERT(!mActor);
}
}
already_AddRefed<Promise>
Cache::ExecuteOp(AutoChildOpArgs& aOpArgs, ErrorResult& aRv)
{
MOZ_ASSERT(mActor);
RefPtr<Promise> promise = Promise::Create(mGlobal, aRv);
if (NS_WARN_IF(!promise)) {
return nullptr;
}
mActor->ExecuteOp(mGlobal, promise, this, aOpArgs.SendAsOpArgs());
return promise.forget();
}
already_AddRefed<Promise>
Cache::AddAll(const GlobalObject& aGlobal,
nsTArray<RefPtr<Request>>&& aRequestList, ErrorResult& aRv)
{
MOZ_ASSERT(mActor);
// If there is no work to do, then resolve immediately
if (aRequestList.IsEmpty()) {
RefPtr<Promise> promise = Promise::Create(mGlobal, aRv);
if (NS_WARN_IF(!promise)) {
return nullptr;
}
promise->MaybeResolveWithUndefined();
return promise.forget();
}
AutoTArray<RefPtr<Promise>, 256> fetchList;
fetchList.SetCapacity(aRequestList.Length());
// Begin fetching each request in parallel. For now, if an error occurs just
// abandon our previous fetch calls. In theory we could cancel them in the
// future once fetch supports it.
for (uint32_t i = 0; i < aRequestList.Length(); ++i) {
RequestOrUSVString requestOrString;
requestOrString.SetAsRequest() = aRequestList[i];
RefPtr<Promise> fetch = FetchRequest(mGlobal, requestOrString,
RequestInit(), aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
fetchList.AppendElement(Move(fetch));
}
RefPtr<Promise> promise = Promise::Create(mGlobal, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
RefPtr<FetchHandler> handler =
new FetchHandler(mActor->GetWorkerHolder(), this,
Move(aRequestList), promise);
RefPtr<Promise> fetchPromise = Promise::All(aGlobal, fetchList, aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
fetchPromise->AppendNativeHandler(handler);
return promise.forget();
}
already_AddRefed<Promise>
Cache::PutAll(const nsTArray<RefPtr<Request>>& aRequestList,
const nsTArray<RefPtr<Response>>& aResponseList,
ErrorResult& aRv)
{
MOZ_ASSERT(aRequestList.Length() == aResponseList.Length());
if (NS_WARN_IF(!mActor)) {
aRv.Throw(NS_ERROR_UNEXPECTED);
return nullptr;
}
CacheChild::AutoLock actorLock(mActor);
AutoChildOpArgs args(this, CachePutAllArgs(), aRequestList.Length());
for (uint32_t i = 0; i < aRequestList.Length(); ++i) {
RefPtr<InternalRequest> ir = aRequestList[i]->GetInternalRequest();
args.Add(ir, ReadBody, TypeErrorOnInvalidScheme, *aResponseList[i], aRv);
if (NS_WARN_IF(aRv.Failed())) {
return nullptr;
}
}
return ExecuteOp(args, aRv);
}
} // namespace cache
} // namespace dom
} // namespace mozilla