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gecko-dev/dom/fetch/FetchDriver.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/DebugOnly.h"
#include "mozilla/dom/FetchDriver.h"
#include "nsIAsyncVerifyRedirectCallback.h"
#include "nsIDocument.h"
#include "nsIInputStream.h"
#include "nsIOutputStream.h"
#include "nsIHttpChannel.h"
#include "nsIHttpChannelInternal.h"
#include "nsIHttpHeaderVisitor.h"
#include "nsIScriptSecurityManager.h"
#include "nsIThreadRetargetableRequest.h"
#include "nsIUploadChannel2.h"
#include "nsIInterfaceRequestorUtils.h"
#include "nsIPipe.h"
#include "nsContentPolicyUtils.h"
#include "nsCORSListenerProxy.h"
#include "nsDataHandler.h"
#include "nsHostObjectProtocolHandler.h"
#include "nsNetUtil.h"
#include "nsPrintfCString.h"
#include "nsStreamUtils.h"
#include "nsStringStream.h"
#include "nsHttpChannel.h"
#include "mozilla/dom/File.h"
#include "mozilla/dom/workers/Workers.h"
#include "mozilla/unused.h"
#include "Fetch.h"
#include "InternalRequest.h"
#include "InternalResponse.h"
namespace mozilla {
namespace dom {
NS_IMPL_ISUPPORTS(FetchDriver,
nsIStreamListener, nsIChannelEventSink, nsIInterfaceRequestor,
nsIThreadRetargetableStreamListener)
FetchDriver::FetchDriver(InternalRequest* aRequest, nsIPrincipal* aPrincipal,
nsILoadGroup* aLoadGroup)
: mPrincipal(aPrincipal)
, mLoadGroup(aLoadGroup)
, mRequest(aRequest)
#ifdef DEBUG
, mResponseAvailableCalled(false)
, mFetchCalled(false)
#endif
{
}
FetchDriver::~FetchDriver()
{
// We assert this since even on failures, we should call
// FailWithNetworkError().
MOZ_ASSERT(mResponseAvailableCalled);
}
nsresult
FetchDriver::Fetch(FetchDriverObserver* aObserver)
{
workers::AssertIsOnMainThread();
#ifdef DEBUG
MOZ_ASSERT(!mFetchCalled);
mFetchCalled = true;
#endif
mObserver = aObserver;
Telemetry::Accumulate(Telemetry::SERVICE_WORKER_REQUEST_PASSTHROUGH,
mRequest->WasCreatedByFetchEvent());
// FIXME(nsm): Deal with HSTS.
MOZ_RELEASE_ASSERT(!mRequest->IsSynchronous(),
"Synchronous fetch not supported");
nsCOMPtr<nsIRunnable> r =
NS_NewRunnableMethod(this, &FetchDriver::ContinueFetch);
return NS_DispatchToCurrentThread(r);
}
nsresult
FetchDriver::ContinueFetch()
{
workers::AssertIsOnMainThread();
nsresult rv = HttpFetch();
if (NS_FAILED(rv)) {
FailWithNetworkError();
}
return rv;
}
// This function implements the "HTTP Fetch" algorithm from the Fetch spec.
// Functionality is often split between here, the CORS listener proxy and the
// Necko HTTP implementation.
nsresult
FetchDriver::HttpFetch()
{
// Step 1. "Let response be null."
mResponse = nullptr;
nsresult rv;
nsCOMPtr<nsIIOService> ios = do_GetIOService(&rv);
NS_ENSURE_SUCCESS(rv, rv);
nsAutoCString url;
mRequest->GetURL(url);
nsCOMPtr<nsIURI> uri;
rv = NS_NewURI(getter_AddRefs(uri),
url,
nullptr,
nullptr,
ios);
NS_ENSURE_SUCCESS(rv, rv);
// Unsafe requests aren't allowed with when using no-core mode.
if (mRequest->Mode() == RequestMode::No_cors &&
mRequest->UnsafeRequest() &&
(!mRequest->HasSimpleMethod() ||
!mRequest->Headers()->HasOnlySimpleHeaders())) {
MOZ_ASSERT(false, "The API should have caught this");
return NS_ERROR_DOM_BAD_URI;
}
// non-GET requests aren't allowed for blob.
if (IsBlobURI(uri)) {
nsAutoCString method;
mRequest->GetMethod(method);
if (!method.EqualsLiteral("GET")) {
return NS_ERROR_DOM_NETWORK_ERR;
}
}
// Step 2 deals with letting ServiceWorkers intercept requests. This is
// handled by Necko after the channel is opened.
// FIXME(nsm): Bug 1119026: The channel's skip service worker flag should be
// set based on the Request's flag.
// Step 3.1 "If the CORS preflight flag is set and one of these conditions is
// true..." is handled by the CORS proxy.
//
// Step 3.2 "Set request's skip service worker flag." This isn't required
// since Necko will fall back to the network if the ServiceWorker does not
// respond with a valid Response.
//
// NS_StartCORSPreflight() will automatically kick off the original request
// if it succeeds, so we need to have everything setup for the original
// request too.
// Step 3.3 "Let credentials flag be set if one of
// - request's credentials mode is "include"
// - request's credentials mode is "same-origin" and either the CORS flag
// is unset or response tainting is "opaque"
// is true, and unset otherwise."
// Set skip serviceworker flag.
// While the spec also gates on the client being a ServiceWorker, we can't
// infer that here. Instead we rely on callers to set the flag correctly.
const nsLoadFlags bypassFlag = mRequest->SkipServiceWorker() ?
nsIChannel::LOAD_BYPASS_SERVICE_WORKER : 0;
nsSecurityFlags secFlags = nsILoadInfo::SEC_ABOUT_BLANK_INHERITS;
if (mRequest->Mode() == RequestMode::Cors) {
secFlags |= nsILoadInfo::SEC_REQUIRE_CORS_DATA_INHERITS;
} else if (mRequest->Mode() == RequestMode::Same_origin ||
mRequest->Mode() == RequestMode::Navigate) {
secFlags |= nsILoadInfo::SEC_REQUIRE_SAME_ORIGIN_DATA_INHERITS;
} else if (mRequest->Mode() == RequestMode::No_cors) {
secFlags |= nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_DATA_INHERITS;
} else {
MOZ_ASSERT_UNREACHABLE("Unexpected request mode!");
return NS_ERROR_UNEXPECTED;
}
if (mRequest->GetRedirectMode() != RequestRedirect::Follow) {
secFlags |= nsILoadInfo::SEC_DONT_FOLLOW_REDIRECTS;
}
// This is handles the use credentials flag in "HTTP
// network or cache fetch" in the spec and decides whether to transmit
// cookies and other identifying information.
if (mRequest->GetCredentialsMode() == RequestCredentials::Include) {
secFlags |= nsILoadInfo::SEC_COOKIES_INCLUDE;
} else if (mRequest->GetCredentialsMode() == RequestCredentials::Omit) {
secFlags |= nsILoadInfo::SEC_COOKIES_OMIT;
} else if (mRequest->GetCredentialsMode() == RequestCredentials::Same_origin) {
secFlags |= nsILoadInfo::SEC_COOKIES_SAME_ORIGIN;
} else {
MOZ_ASSERT_UNREACHABLE("Unexpected credentials mode!");
return NS_ERROR_UNEXPECTED;
}
// From here on we create a channel and set its properties with the
// information from the InternalRequest. This is an implementation detail.
MOZ_ASSERT(mLoadGroup);
nsCOMPtr<nsIChannel> chan;
nsLoadFlags loadFlags = nsIRequest::LOAD_NORMAL |
bypassFlag | nsIChannel::LOAD_CLASSIFY_URI;
if (mDocument) {
MOZ_ASSERT(mDocument->NodePrincipal() == mPrincipal);
rv = NS_NewChannel(getter_AddRefs(chan),
uri,
mDocument,
secFlags,
mRequest->ContentPolicyType(),
mLoadGroup,
nullptr, /* aCallbacks */
loadFlags,
ios);
} else {
rv = NS_NewChannel(getter_AddRefs(chan),
uri,
mPrincipal,
secFlags,
mRequest->ContentPolicyType(),
mLoadGroup,
nullptr, /* aCallbacks */
loadFlags,
ios);
}
NS_ENSURE_SUCCESS(rv, rv);
mLoadGroup = nullptr;
// Insert ourselves into the notification callbacks chain so we can set
// headers on redirects.
#ifdef DEBUG
{
nsCOMPtr<nsIInterfaceRequestor> notificationCallbacks;
chan->GetNotificationCallbacks(getter_AddRefs(notificationCallbacks));
MOZ_ASSERT(!notificationCallbacks);
}
#endif
chan->SetNotificationCallbacks(this);
// Step 3.5 begins "HTTP network or cache fetch".
// HTTP network or cache fetch
// ---------------------------
// Step 1 "Let HTTPRequest..." The channel is the HTTPRequest.
nsCOMPtr<nsIHttpChannel> httpChan = do_QueryInterface(chan);
if (httpChan) {
// Copy the method.
nsAutoCString method;
mRequest->GetMethod(method);
rv = httpChan->SetRequestMethod(method);
NS_ENSURE_SUCCESS(rv, rv);
// Set the same headers.
SetRequestHeaders(httpChan);
// Step 2. Set the referrer.
nsAutoString referrer;
mRequest->GetReferrer(referrer);
ReferrerPolicy referrerPolicy = mRequest->ReferrerPolicy_();
net::ReferrerPolicy net_referrerPolicy = net::RP_Unset;
switch (referrerPolicy) {
case ReferrerPolicy::_empty:
net_referrerPolicy = net::RP_Default;
break;
case ReferrerPolicy::No_referrer:
net_referrerPolicy = net::RP_No_Referrer;
break;
case ReferrerPolicy::No_referrer_when_downgrade:
net_referrerPolicy = net::RP_No_Referrer_When_Downgrade;
break;
case ReferrerPolicy::Origin:
net_referrerPolicy = net::RP_Origin;
break;
case ReferrerPolicy::Origin_when_cross_origin:
net_referrerPolicy = net::RP_Origin_When_Crossorigin;
break;
case ReferrerPolicy::Unsafe_url:
net_referrerPolicy = net::RP_Unsafe_URL;
break;
default:
MOZ_ASSERT_UNREACHABLE("Invalid ReferrerPolicy enum value?");
break;
}
if (referrer.EqualsLiteral(kFETCH_CLIENT_REFERRER_STR)) {
rv = nsContentUtils::SetFetchReferrerURIWithPolicy(mPrincipal,
mDocument,
httpChan,
net_referrerPolicy);
NS_ENSURE_SUCCESS(rv, rv);
} else if (referrer.IsEmpty()) {
rv = httpChan->SetReferrerWithPolicy(nullptr, net::RP_No_Referrer);
NS_ENSURE_SUCCESS(rv, rv);
} else {
// From "Determine request's Referrer" step 3
// "If request's referrer is a URL, let referrerSource be request's
// referrer."
nsCOMPtr<nsIURI> referrerURI;
rv = NS_NewURI(getter_AddRefs(referrerURI), referrer, nullptr, nullptr);
NS_ENSURE_SUCCESS(rv, rv);
uint32_t documentReferrerPolicy = mDocument ? mDocument->GetReferrerPolicy() :
net::RP_Default;
rv =
httpChan->SetReferrerWithPolicy(referrerURI,
referrerPolicy == ReferrerPolicy::_empty ?
documentReferrerPolicy :
net_referrerPolicy);
NS_ENSURE_SUCCESS(rv, rv);
}
// Bug 1120722 - Authorization will be handled later.
// Auth may require prompting, we don't support it yet.
// The next patch in this same bug prevents this from aborting the request.
// Credentials checks for CORS are handled by nsCORSListenerProxy,
nsCOMPtr<nsIHttpChannelInternal> internalChan = do_QueryInterface(httpChan);
// Conversion between enumerations is safe due to static asserts in
// dom/workers/ServiceWorkerManager.cpp
internalChan->SetCorsMode(static_cast<uint32_t>(mRequest->Mode()));
internalChan->SetRedirectMode(static_cast<uint32_t>(mRequest->GetRedirectMode()));
mRequest->MaybeSkipCacheIfPerformingRevalidation();
internalChan->SetFetchCacheMode(static_cast<uint32_t>(mRequest->GetCacheMode()));
}
// Step 5. Proxy authentication will be handled by Necko.
// Continue setting up 'HTTPRequest'. Content-Type and body data.
nsCOMPtr<nsIUploadChannel2> uploadChan = do_QueryInterface(chan);
if (uploadChan) {
nsAutoCString contentType;
ErrorResult result;
mRequest->Headers()->Get(NS_LITERAL_CSTRING("content-type"), contentType, result);
// This is an error because the Request constructor explicitly extracts and
// sets a content-type per spec.
if (result.Failed()) {
return result.StealNSResult();
}
nsCOMPtr<nsIInputStream> bodyStream;
mRequest->GetBody(getter_AddRefs(bodyStream));
if (bodyStream) {
nsAutoCString method;
mRequest->GetMethod(method);
rv = uploadChan->ExplicitSetUploadStream(bodyStream, contentType, -1, method, false /* aStreamHasHeaders */);
NS_ENSURE_SUCCESS(rv, rv);
}
}
// If preflight is required, start a "CORS preflight fetch"
// https://fetch.spec.whatwg.org/#cors-preflight-fetch-0. All the
// implementation is handled by the http channel calling into
// nsCORSListenerProxy. We just inform it which unsafe headers are included
// in the request.
if (mRequest->Mode() == RequestMode::Cors) {
AutoTArray<nsCString, 5> unsafeHeaders;
mRequest->Headers()->GetUnsafeHeaders(unsafeHeaders);
nsCOMPtr<nsILoadInfo> loadInfo = chan->GetLoadInfo();
loadInfo->SetCorsPreflightInfo(unsafeHeaders, false);
}
rv = chan->AsyncOpen2(this);
NS_ENSURE_SUCCESS(rv, rv);
// Step 4 onwards of "HTTP Fetch" is handled internally by Necko.
return NS_OK;
}
already_AddRefed<InternalResponse>
FetchDriver::BeginAndGetFilteredResponse(InternalResponse* aResponse,
nsIURI* aFinalURI,
bool aFoundOpaqueRedirect)
{
MOZ_ASSERT(aResponse);
nsAutoCString reqURL;
if (aFinalURI) {
aFinalURI->GetSpec(reqURL);
} else {
mRequest->GetURL(reqURL);
}
DebugOnly<nsresult> rv = aResponse->StripFragmentAndSetUrl(reqURL);
MOZ_ASSERT(NS_SUCCEEDED(rv));
RefPtr<InternalResponse> filteredResponse;
if (aFoundOpaqueRedirect) {
filteredResponse = aResponse->OpaqueRedirectResponse();
} else {
switch (mRequest->GetResponseTainting()) {
case LoadTainting::Basic:
filteredResponse = aResponse->BasicResponse();
break;
case LoadTainting::CORS:
filteredResponse = aResponse->CORSResponse();
break;
case LoadTainting::Opaque:
filteredResponse = aResponse->OpaqueResponse();
break;
default:
MOZ_CRASH("Unexpected case");
}
}
MOZ_ASSERT(filteredResponse);
MOZ_ASSERT(mObserver);
mObserver->OnResponseAvailable(filteredResponse);
#ifdef DEBUG
mResponseAvailableCalled = true;
#endif
return filteredResponse.forget();
}
void
FetchDriver::FailWithNetworkError()
{
workers::AssertIsOnMainThread();
RefPtr<InternalResponse> error = InternalResponse::NetworkError();
if (mObserver) {
mObserver->OnResponseAvailable(error);
#ifdef DEBUG
mResponseAvailableCalled = true;
#endif
mObserver->OnResponseEnd();
mObserver = nullptr;
}
}
namespace {
class FillResponseHeaders final : public nsIHttpHeaderVisitor {
InternalResponse* mResponse;
~FillResponseHeaders()
{ }
public:
NS_DECL_ISUPPORTS
explicit FillResponseHeaders(InternalResponse* aResponse)
: mResponse(aResponse)
{
}
NS_IMETHOD
VisitHeader(const nsACString & aHeader, const nsACString & aValue) override
{
ErrorResult result;
mResponse->Headers()->Append(aHeader, aValue, result);
if (result.Failed()) {
NS_WARNING(nsPrintfCString("Fetch ignoring illegal header - '%s': '%s'",
PromiseFlatCString(aHeader).get(),
PromiseFlatCString(aValue).get()).get());
result.SuppressException();
}
return NS_OK;
}
};
NS_IMPL_ISUPPORTS(FillResponseHeaders, nsIHttpHeaderVisitor)
} // namespace
NS_IMETHODIMP
FetchDriver::OnStartRequest(nsIRequest* aRequest,
nsISupports* aContext)
{
workers::AssertIsOnMainThread();
// Note, this can be called multiple times if we are doing an opaqueredirect.
// In that case we will get a simulated OnStartRequest() and then the real
// channel will call in with an errored OnStartRequest().
nsresult rv;
aRequest->GetStatus(&rv);
if (NS_FAILED(rv)) {
FailWithNetworkError();
return rv;
}
// We should only get to the following code once.
MOZ_ASSERT(!mPipeOutputStream);
MOZ_ASSERT(mObserver);
RefPtr<InternalResponse> response;
nsCOMPtr<nsIChannel> channel = do_QueryInterface(aRequest);
nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(aRequest);
// On a successful redirect we perform the following substeps of HTTP Fetch,
// step 5, "redirect status", step 11.
// Step 11.5 "Append locationURL to request's url list." so that when we set the
// Response's URL from the Request's URL in Main Fetch, step 15, we get the
// final value. Note, we still use a single URL value instead of a list.
// Because of that we only need to do this after the request finishes.
nsCOMPtr<nsIURI> newURI;
rv = NS_GetFinalChannelURI(channel, getter_AddRefs(newURI));
if (NS_FAILED(rv)) {
FailWithNetworkError();
return rv;
}
nsAutoCString newUrl;
newURI->GetSpec(newUrl);
mRequest->SetURL(newUrl);
bool foundOpaqueRedirect = false;
if (httpChannel) {
uint32_t responseStatus;
httpChannel->GetResponseStatus(&responseStatus);
if (mozilla::net::nsHttpChannel::IsRedirectStatus(responseStatus)) {
if (mRequest->GetRedirectMode() == RequestRedirect::Error) {
FailWithNetworkError();
return NS_BINDING_FAILED;
}
if (mRequest->GetRedirectMode() == RequestRedirect::Manual) {
foundOpaqueRedirect = true;
}
}
nsAutoCString statusText;
httpChannel->GetResponseStatusText(statusText);
response = new InternalResponse(responseStatus, statusText);
RefPtr<FillResponseHeaders> visitor = new FillResponseHeaders(response);
rv = httpChannel->VisitResponseHeaders(visitor);
if (NS_WARN_IF(NS_FAILED(rv))) {
NS_WARNING("Failed to visit all headers.");
}
} else {
response = new InternalResponse(200, NS_LITERAL_CSTRING("OK"));
ErrorResult result;
nsAutoCString contentType;
rv = channel->GetContentType(contentType);
if (NS_SUCCEEDED(rv) && !contentType.IsEmpty()) {
nsAutoCString contentCharset;
channel->GetContentCharset(contentCharset);
if (NS_SUCCEEDED(rv) && !contentCharset.IsEmpty()) {
contentType += NS_LITERAL_CSTRING(";charset=") + contentCharset;
}
response->Headers()->Append(NS_LITERAL_CSTRING("Content-Type"),
contentType,
result);
MOZ_ASSERT(!result.Failed());
}
int64_t contentLength;
rv = channel->GetContentLength(&contentLength);
if (NS_SUCCEEDED(rv) && contentLength) {
nsAutoCString contentLenStr;
contentLenStr.AppendInt(contentLength);
response->Headers()->Append(NS_LITERAL_CSTRING("Content-Length"),
contentLenStr,
result);
MOZ_ASSERT(!result.Failed());
}
}
// We open a pipe so that we can immediately set the pipe's read end as the
// response's body. Setting the segment size to UINT32_MAX means that the
// pipe has infinite space. The nsIChannel will continue to buffer data in
// xpcom events even if we block on a fixed size pipe. It might be possible
// to suspend the channel and then resume when there is space available, but
// for now use an infinite pipe to avoid blocking.
nsCOMPtr<nsIInputStream> pipeInputStream;
rv = NS_NewPipe(getter_AddRefs(pipeInputStream),
getter_AddRefs(mPipeOutputStream),
0, /* default segment size */
UINT32_MAX /* infinite pipe */,
true /* non-blocking input, otherwise you deadlock */,
false /* blocking output, since the pipe is 'in'finite */ );
if (NS_WARN_IF(NS_FAILED(rv))) {
FailWithNetworkError();
// Cancel request.
return rv;
}
response->SetBody(pipeInputStream);
response->InitChannelInfo(channel);
nsCOMPtr<nsIURI> channelURI;
rv = channel->GetURI(getter_AddRefs(channelURI));
if (NS_WARN_IF(NS_FAILED(rv))) {
FailWithNetworkError();
// Cancel request.
return rv;
}
nsCOMPtr<nsILoadInfo> loadInfo;
rv = channel->GetLoadInfo(getter_AddRefs(loadInfo));
if (NS_WARN_IF(NS_FAILED(rv))) {
FailWithNetworkError();
return rv;
}
// Propagate any tainting from the channel back to our response here. This
// step is not reflected in the spec because the spec is written such that
// FetchEvent.respondWith() just passes the already-tainted Response back to
// the outer fetch(). In gecko, however, we serialize the Response through
// the channel and must regenerate the tainting from the channel in the
// interception case.
mRequest->MaybeIncreaseResponseTainting(loadInfo->GetTainting());
// Resolves fetch() promise which may trigger code running in a worker. Make
// sure the Response is fully initialized before calling this.
mResponse = BeginAndGetFilteredResponse(response, channelURI,
foundOpaqueRedirect);
nsCOMPtr<nsIEventTarget> sts = do_GetService(NS_STREAMTRANSPORTSERVICE_CONTRACTID, &rv);
if (NS_WARN_IF(NS_FAILED(rv))) {
FailWithNetworkError();
// Cancel request.
return rv;
}
// Try to retarget off main thread.
if (nsCOMPtr<nsIThreadRetargetableRequest> rr = do_QueryInterface(aRequest)) {
NS_WARN_IF(NS_FAILED(rr->RetargetDeliveryTo(sts)));
}
return NS_OK;
}
NS_IMETHODIMP
FetchDriver::OnDataAvailable(nsIRequest* aRequest,
nsISupports* aContext,
nsIInputStream* aInputStream,
uint64_t aOffset,
uint32_t aCount)
{
// NB: This can be called on any thread! But we're guaranteed that it is
// called between OnStartRequest and OnStopRequest, so we don't need to worry
// about races.
uint32_t aRead;
MOZ_ASSERT(mResponse);
MOZ_ASSERT(mPipeOutputStream);
nsresult rv = aInputStream->ReadSegments(NS_CopySegmentToStream,
mPipeOutputStream,
aCount, &aRead);
return rv;
}
NS_IMETHODIMP
FetchDriver::OnStopRequest(nsIRequest* aRequest,
nsISupports* aContext,
nsresult aStatusCode)
{
workers::AssertIsOnMainThread();
if (NS_FAILED(aStatusCode)) {
nsCOMPtr<nsIAsyncOutputStream> outputStream = do_QueryInterface(mPipeOutputStream);
if (outputStream) {
outputStream->CloseWithStatus(NS_BINDING_FAILED);
}
// We proceed as usual here, since we've already created a successful response
// from OnStartRequest.
} else {
MOZ_ASSERT(mResponse);
MOZ_ASSERT(!mResponse->IsError());
if (mPipeOutputStream) {
mPipeOutputStream->Close();
}
}
if (mObserver) {
mObserver->OnResponseEnd();
mObserver = nullptr;
}
return NS_OK;
}
NS_IMETHODIMP
FetchDriver::AsyncOnChannelRedirect(nsIChannel* aOldChannel,
nsIChannel* aNewChannel,
uint32_t aFlags,
nsIAsyncVerifyRedirectCallback *aCallback)
{
nsCOMPtr<nsIHttpChannel> httpChannel = do_QueryInterface(aNewChannel);
if (httpChannel) {
SetRequestHeaders(httpChannel);
}
aCallback->OnRedirectVerifyCallback(NS_OK);
return NS_OK;
}
NS_IMETHODIMP
FetchDriver::CheckListenerChain()
{
return NS_OK;
}
NS_IMETHODIMP
FetchDriver::GetInterface(const nsIID& aIID, void **aResult)
{
if (aIID.Equals(NS_GET_IID(nsIChannelEventSink))) {
*aResult = static_cast<nsIChannelEventSink*>(this);
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(NS_GET_IID(nsIStreamListener))) {
*aResult = static_cast<nsIStreamListener*>(this);
NS_ADDREF_THIS();
return NS_OK;
}
if (aIID.Equals(NS_GET_IID(nsIRequestObserver))) {
*aResult = static_cast<nsIRequestObserver*>(this);
NS_ADDREF_THIS();
return NS_OK;
}
return QueryInterface(aIID, aResult);
}
void
FetchDriver::SetDocument(nsIDocument* aDocument)
{
// Cannot set document after Fetch() has been called.
MOZ_ASSERT(!mFetchCalled);
mDocument = aDocument;
}
void
FetchDriver::SetRequestHeaders(nsIHttpChannel* aChannel) const
{
MOZ_ASSERT(aChannel);
AutoTArray<InternalHeaders::Entry, 5> headers;
mRequest->Headers()->GetEntries(headers);
bool hasAccept = false;
for (uint32_t i = 0; i < headers.Length(); ++i) {
if (!hasAccept && headers[i].mName.EqualsLiteral("accept")) {
hasAccept = true;
}
if (headers[i].mValue.IsEmpty()) {
aChannel->SetEmptyRequestHeader(headers[i].mName);
} else {
aChannel->SetRequestHeader(headers[i].mName, headers[i].mValue, false /* merge */);
}
}
if (!hasAccept) {
aChannel->SetRequestHeader(NS_LITERAL_CSTRING("accept"),
NS_LITERAL_CSTRING("*/*"),
false /* merge */);
}
if (mRequest->ForceOriginHeader()) {
nsAutoString origin;
if (NS_SUCCEEDED(nsContentUtils::GetUTFOrigin(mPrincipal, origin))) {
aChannel->SetRequestHeader(NS_LITERAL_CSTRING("origin"),
NS_ConvertUTF16toUTF8(origin),
false /* merge */);
}
}
}
} // namespace dom
} // namespace mozilla
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