mirror of
https://github.com/mozilla/gecko-dev.git
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121 lines
4.6 KiB
C++
121 lines
4.6 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this file,
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* You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "FontPreloader.h"
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#include "gfxUserFontSet.h"
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#include "nsIClassOfService.h"
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#include "nsIHttpChannel.h"
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#include "nsISupportsPriority.h"
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namespace mozilla {
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FontPreloader::FontPreloader()
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: FetchPreloader(nsIContentPolicy::TYPE_INTERNAL_FONT_PRELOAD) {}
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void FontPreloader::PrioritizeAsPreload() { PrioritizeAsPreload(Channel()); }
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nsresult FontPreloader::CreateChannel(
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nsIChannel** aChannel, nsIURI* aURI, const CORSMode aCORSMode,
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const dom::ReferrerPolicy& aReferrerPolicy, dom::Document* aDocument,
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nsILoadGroup* aLoadGroup, nsIInterfaceRequestor* aCallbacks) {
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return BuildChannel(aChannel, aURI, aCORSMode, aReferrerPolicy, nullptr,
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nullptr, aDocument, aLoadGroup, aCallbacks, true);
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}
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// static
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void FontPreloader::PrioritizeAsPreload(nsIChannel* aChannel) {
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nsCOMPtr<nsIClassOfService> cos(do_QueryInterface(aChannel));
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if (cos) {
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cos->AddClassFlags(nsIClassOfService::Unblocked);
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}
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}
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// static
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nsresult FontPreloader::BuildChannel(
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nsIChannel** aChannel, nsIURI* aURI, const CORSMode aCORSMode,
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const dom::ReferrerPolicy& aReferrerPolicy,
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gfxUserFontEntry* aUserFontEntry, const gfxFontFaceSrc* aFontFaceSrc,
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dom::Document* aDocument, nsILoadGroup* aLoadGroup,
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nsIInterfaceRequestor* aCallbacks, bool aIsPreload) {
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nsresult rv;
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nsIPrincipal* principal =
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aUserFontEntry ? (aUserFontEntry->GetPrincipal()
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? aUserFontEntry->GetPrincipal()->NodePrincipal()
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: nullptr)
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: aDocument->NodePrincipal();
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// aCORSMode is ignored. We always load as crossorigin=anonymous, but a
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// preload started with anything other then "anonymous" will never be found.
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uint32_t securityFlags = 0;
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if (aURI->SchemeIs("file")) {
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securityFlags = nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_INHERITS_SEC_CONTEXT;
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} else {
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securityFlags = nsILoadInfo::SEC_REQUIRE_CORS_INHERITS_SEC_CONTEXT;
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}
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nsContentPolicyType contentPolicyType =
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aIsPreload ? nsIContentPolicy::TYPE_INTERNAL_FONT_PRELOAD
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: nsIContentPolicy::TYPE_FONT;
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nsCOMPtr<nsIChannel> channel;
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// Note we are calling NS_NewChannelWithTriggeringPrincipal() with both a
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// node and a principal. This is because the document where the font is
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// being loaded might have a different origin from the principal of the
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// stylesheet that initiated the font load.
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rv = NS_NewChannelWithTriggeringPrincipal(getter_AddRefs(channel), aURI,
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aDocument, principal, securityFlags,
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contentPolicyType,
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nullptr, // PerformanceStorage
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aLoadGroup);
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NS_ENSURE_SUCCESS(rv, rv);
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nsCOMPtr<nsIHttpChannel> httpChannel(do_QueryInterface(channel));
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if (httpChannel) {
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rv = httpChannel->SetRequestHeader(
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"Accept"_ns,
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nsLiteralCString("application/font-woff2;q=1.0,application/"
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"font-woff;q=0.9,*/*;q=0.8"),
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false);
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NS_ENSURE_SUCCESS(rv, rv);
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if (aFontFaceSrc) {
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rv = httpChannel->SetReferrerInfo(aFontFaceSrc->mReferrerInfo);
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Unused << NS_WARN_IF(NS_FAILED(rv));
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// For WOFF and WOFF2, we should tell servers/proxies/etc NOT to try
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// and apply additional compression at the content-encoding layer
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if (aFontFaceSrc->mFormatFlags & (gfxUserFontSet::FLAG_FORMAT_WOFF |
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gfxUserFontSet::FLAG_FORMAT_WOFF2)) {
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rv = httpChannel->SetRequestHeader("Accept-Encoding"_ns, "identity"_ns,
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false);
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NS_ENSURE_SUCCESS(rv, rv);
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}
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} else {
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nsCOMPtr<nsIReferrerInfo> referrerInfo = new dom::ReferrerInfo(
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aDocument->GetDocumentURIAsReferrer(), aReferrerPolicy);
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rv = httpChannel->SetReferrerInfoWithoutClone(referrerInfo);
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MOZ_ASSERT(NS_SUCCEEDED(rv));
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}
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}
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nsCOMPtr<nsISupportsPriority> priorityChannel(do_QueryInterface(channel));
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if (priorityChannel) {
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priorityChannel->AdjustPriority(nsISupportsPriority::PRIORITY_HIGH);
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}
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nsCOMPtr<nsIClassOfService> cos(do_QueryInterface(channel));
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if (cos) {
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cos->AddClassFlags(nsIClassOfService::TailForbidden);
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}
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channel.forget(aChannel);
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return NS_OK;
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}
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} // namespace mozilla
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