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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 "FontPreloader.h"
#include "gfxUserFontSet.h"
#include "mozilla/dom/Document.h"
#include "mozilla/dom/WorkerPrivate.h"
#include "mozilla/dom/ReferrerInfo.h"
#include "nsContentSecurityManager.h"
#include "nsIClassOfService.h"
#include "nsIHttpChannel.h"
#include "nsISupportsPriority.h"
#include "nsNetUtil.h"
namespace mozilla {
FontPreloader::FontPreloader()
: FetchPreloader(nsIContentPolicy::TYPE_INTERNAL_FONT_PRELOAD) {}
void FontPreloader::PrioritizeAsPreload() { PrioritizeAsPreload(Channel()); }
nsresult FontPreloader::CreateChannel(
nsIChannel** aChannel, nsIURI* aURI, const CORSMode aCORSMode,
const dom::ReferrerPolicy& aReferrerPolicy, dom::Document* aDocument,
nsILoadGroup* aLoadGroup, nsIInterfaceRequestor* aCallbacks,
uint64_t aEarlyHintPreloaderId) {
return BuildChannel(aChannel, aURI, aCORSMode, aReferrerPolicy, nullptr,
nullptr, aDocument, aLoadGroup, aCallbacks, true);
}
// static
void FontPreloader::PrioritizeAsPreload(nsIChannel* aChannel) {
nsCOMPtr<nsIClassOfService> cos(do_QueryInterface(aChannel));
if (cos) {
cos->AddClassFlags(nsIClassOfService::Unblocked);
}
}
/* static */ void FontPreloader::BuildChannelFlags(
nsIURI* aURI, bool aIsPreload,
nsContentSecurityManager::CORSSecurityMapping& aCorsMapping,
nsSecurityFlags& aSecurityFlags, nsContentPolicyType& aContentPolicyType) {
// aCORSMode is ignored. We always load as crossorigin=anonymous, but a
// preload started with anything other then "anonymous" will never be found.
aCorsMapping =
aURI->SchemeIs("file")
? nsContentSecurityManager::CORSSecurityMapping::
CORS_NONE_MAPS_TO_INHERITED_CONTEXT
: nsContentSecurityManager::CORSSecurityMapping::REQUIRE_CORS_CHECKS;
aSecurityFlags = nsContentSecurityManager::ComputeSecurityFlags(
CORSMode::CORS_NONE, aCorsMapping);
aContentPolicyType = aIsPreload ? nsIContentPolicy::TYPE_INTERNAL_FONT_PRELOAD
: nsIContentPolicy::TYPE_FONT;
}
/* static */ nsresult FontPreloader::BuildChannelSetup(
nsIChannel* aChannel, nsIHttpChannel* aHttpChannel,
nsIReferrerInfo* aReferrerInfo, const gfxFontFaceSrc* aFontFaceSrc) {
if (aHttpChannel) {
nsresult rv = aHttpChannel->SetRequestHeader(
"Accept"_ns,
"application/font-woff2;q=1.0,application/font-woff;q=0.9,*/*;q=0.8"_ns,
false);
NS_ENSURE_SUCCESS(rv, rv);
if (aReferrerInfo) {
rv = aHttpChannel->SetReferrerInfoWithoutClone(aReferrerInfo);
MOZ_ASSERT(NS_SUCCEEDED(rv));
} else {
MOZ_ASSERT(aFontFaceSrc);
rv = aHttpChannel->SetReferrerInfo(aFontFaceSrc->mReferrerInfo);
Unused << NS_WARN_IF(NS_FAILED(rv));
// For WOFF and WOFF2, we should tell servers/proxies/etc NOT to try
// and apply additional compression at the content-encoding layer
if (aFontFaceSrc->mFormatHint == StyleFontFaceSourceFormatKeyword::Woff ||
aFontFaceSrc->mFormatHint ==
StyleFontFaceSourceFormatKeyword::Woff2) {
rv = aHttpChannel->SetRequestHeader("Accept-Encoding"_ns, "identity"_ns,
false);
NS_ENSURE_SUCCESS(rv, rv);
}
}
}
nsCOMPtr<nsISupportsPriority> priorityChannel(do_QueryInterface(aChannel));
if (priorityChannel) {
priorityChannel->AdjustPriority(nsISupportsPriority::PRIORITY_HIGH);
}
nsCOMPtr<nsIClassOfService> cos(do_QueryInterface(aChannel));
if (cos) {
cos->AddClassFlags(nsIClassOfService::TailForbidden);
}
return NS_OK;
}
// static
nsresult FontPreloader::BuildChannel(
nsIChannel** aChannel, nsIURI* aURI, const CORSMode aCORSMode,
const dom::ReferrerPolicy& aReferrerPolicy,
gfxUserFontEntry* aUserFontEntry, const gfxFontFaceSrc* aFontFaceSrc,
dom::Document* aDocument, nsILoadGroup* aLoadGroup,
nsIInterfaceRequestor* aCallbacks, bool aIsPreload) {
nsresult rv;
nsIPrincipal* principal =
aUserFontEntry ? (aUserFontEntry->GetPrincipal()
? aUserFontEntry->GetPrincipal()->NodePrincipal()
: nullptr)
: aDocument->NodePrincipal();
nsContentSecurityManager::CORSSecurityMapping corsMapping;
nsSecurityFlags securityFlags;
nsContentPolicyType contentPolicyType;
BuildChannelFlags(aURI, aIsPreload, corsMapping, securityFlags,
contentPolicyType);
nsCOMPtr<nsIChannel> channel;
// Note we are calling NS_NewChannelWithTriggeringPrincipal() with both a
// node and a principal. This is because the document where the font is
// being loaded might have a different origin from the principal of the
// stylesheet that initiated the font load.
rv = NS_NewChannelWithTriggeringPrincipal(getter_AddRefs(channel), aURI,
aDocument, principal, securityFlags,
contentPolicyType,
nullptr, // PerformanceStorage
aLoadGroup);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIHttpChannel> httpChannel(do_QueryInterface(channel));
nsCOMPtr<nsIReferrerInfo> referrerInfo;
if (httpChannel && !aFontFaceSrc) {
referrerInfo = new dom::ReferrerInfo(aDocument->GetDocumentURIAsReferrer(),
aReferrerPolicy);
rv = httpChannel->SetReferrerInfoWithoutClone(referrerInfo);
MOZ_ASSERT(NS_SUCCEEDED(rv));
}
rv = BuildChannelSetup(channel, httpChannel, referrerInfo, aFontFaceSrc);
NS_ENSURE_SUCCESS(rv, rv);
channel.forget(aChannel);
return NS_OK;
}
// static
nsresult FontPreloader::BuildChannel(
nsIChannel** aChannel, nsIURI* aURI, const CORSMode aCORSMode,
const dom::ReferrerPolicy& aReferrerPolicy,
gfxUserFontEntry* aUserFontEntry, const gfxFontFaceSrc* aFontFaceSrc,
dom::WorkerPrivate* aWorkerPrivate, nsILoadGroup* aLoadGroup,
nsIInterfaceRequestor* aCallbacks, bool aIsPreload) {
nsresult rv;
nsIPrincipal* principal =
aUserFontEntry ? (aUserFontEntry->GetPrincipal()
? aUserFontEntry->GetPrincipal()->NodePrincipal()
: nullptr)
: aWorkerPrivate->GetPrincipal();
nsContentSecurityManager::CORSSecurityMapping corsMapping;
nsSecurityFlags securityFlags;
nsContentPolicyType contentPolicyType;
BuildChannelFlags(aURI, aIsPreload, corsMapping, securityFlags,
contentPolicyType);
nsCOMPtr<nsIChannel> channel;
rv = NS_NewChannelWithTriggeringPrincipal(
getter_AddRefs(channel), aURI, aWorkerPrivate->GetLoadingPrincipal(),
principal, securityFlags, contentPolicyType, nullptr, nullptr,
aLoadGroup);
NS_ENSURE_SUCCESS(rv, rv);
nsCOMPtr<nsIHttpChannel> httpChannel(do_QueryInterface(channel));
nsCOMPtr<nsIReferrerInfo> referrerInfo;
if (httpChannel && !aFontFaceSrc) {
referrerInfo =
static_cast<dom::ReferrerInfo*>(aWorkerPrivate->GetReferrerInfo())
->CloneWithNewPolicy(aReferrerPolicy);
}
rv = BuildChannelSetup(channel, httpChannel, referrerInfo, aFontFaceSrc);
NS_ENSURE_SUCCESS(rv, rv);
channel.forget(aChannel);
return NS_OK;
}
} // namespace mozilla
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