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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 "nsIClassOfService.h"
#include "nsIHttpChannel.h"
#include "nsISupportsPriority.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) {
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
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();
// aCORSMode is ignored. We always load as crossorigin=anonymous, but a
// preload started with anything other then "anonymous" will never be found.
uint32_t securityFlags = 0;
if (aURI->SchemeIs("file")) {
securityFlags = nsILoadInfo::SEC_ALLOW_CROSS_ORIGIN_INHERITS_SEC_CONTEXT;
} else {
securityFlags = nsILoadInfo::SEC_REQUIRE_CORS_INHERITS_SEC_CONTEXT;
}
nsContentPolicyType contentPolicyType =
aIsPreload ? nsIContentPolicy::TYPE_INTERNAL_FONT_PRELOAD
: nsIContentPolicy::TYPE_FONT;
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));
if (httpChannel) {
rv = httpChannel->SetRequestHeader(
"Accept"_ns,
nsLiteralCString("application/font-woff2;q=1.0,application/"
"font-woff;q=0.9,*/*;q=0.8"),
false);
NS_ENSURE_SUCCESS(rv, rv);
if (aFontFaceSrc) {
rv = httpChannel->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->mFormatFlags & (gfxUserFontSet::FLAG_FORMAT_WOFF |
gfxUserFontSet::FLAG_FORMAT_WOFF2)) {
rv = httpChannel->SetRequestHeader("Accept-Encoding"_ns, "identity"_ns,
false);
NS_ENSURE_SUCCESS(rv, rv);
}
} else {
nsCOMPtr<nsIReferrerInfo> referrerInfo = new dom::ReferrerInfo(
aDocument->GetDocumentURIAsReferrer(), aReferrerPolicy);
rv = httpChannel->SetReferrerInfoWithoutClone(referrerInfo);
MOZ_ASSERT(NS_SUCCEEDED(rv));
}
}
nsCOMPtr<nsISupportsPriority> priorityChannel(do_QueryInterface(channel));
if (priorityChannel) {
priorityChannel->AdjustPriority(nsISupportsPriority::PRIORITY_HIGH);
}
nsCOMPtr<nsIClassOfService> cos(do_QueryInterface(channel));
if (cos) {
cos->AddClassFlags(nsIClassOfService::TailForbidden);
}
channel.forget(aChannel);
return NS_OK;
}
} // namespace mozilla