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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/public/common/loader/network_utils.h"
#include "media/media_buildflags.h"
#include "net/http/http_request_headers.h"
#include "services/network/public/cpp/constants.h"
#include "services/network/public/mojom/fetch_api.mojom.h"
#include "third_party/blink/public/common/buildflags.h"
namespace blink {
namespace network_utils {
namespace {
constexpr char kJsonAcceptHeader[] = "application/json,*/*;q=0.5";
constexpr char kStylesheetAcceptHeader[] = "text/css,*/*;q=0.1";
constexpr char kWebBundleAcceptHeader[] = "application/webbundle;v=b2";
} // namespace
bool AlwaysAccessNetwork(
const scoped_refptr<net::HttpResponseHeaders>& headers) {
if (!headers)
return false;
// RFC 2616, section 14.9.
return headers->HasHeaderValue("cache-control", "no-cache") ||
headers->HasHeaderValue("cache-control", "no-store") ||
headers->HasHeaderValue("pragma", "no-cache") ||
headers->HasHeaderValue("vary", "*");
}
const char* ImageAcceptHeader() {
#if BUILDFLAG(ENABLE_AV1_DECODER)
return "image/avif,image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8";
#else
return "image/webp,image/apng,image/svg+xml,image/*,*/*;q=0.8";
#endif
}
void SetAcceptHeader(net::HttpRequestHeaders& headers,
network::mojom::RequestDestination request_destination) {
if (request_destination == network::mojom::RequestDestination::kStyle ||
request_destination == network::mojom::RequestDestination::kXslt ||
request_destination == network::mojom::RequestDestination::kWebBundle ||
request_destination == network::mojom::RequestDestination::kJson) {
headers.SetHeader(net::HttpRequestHeaders::kAccept,
GetAcceptHeaderForDestination(request_destination));
return;
}
// Calling SetHeaderIfMissing() instead of SetHeader() because JS can
// manually set an accept header on an XHR.
headers.SetHeaderIfMissing(
net::HttpRequestHeaders::kAccept,
GetAcceptHeaderForDestination(request_destination));
}
const char* GetAcceptHeaderForDestination(
network::mojom::RequestDestination request_destination) {
if (request_destination == network::mojom::RequestDestination::kStyle ||
request_destination == network::mojom::RequestDestination::kXslt) {
return kStylesheetAcceptHeader;
} else if (request_destination ==
network::mojom::RequestDestination::kImage) {
return ImageAcceptHeader();
} else if (request_destination ==
network::mojom::RequestDestination::kWebBundle) {
return kWebBundleAcceptHeader;
} else if (request_destination == network::mojom::RequestDestination::kJson) {
return kJsonAcceptHeader;
} else {
return network::kDefaultAcceptHeaderValue;
}
}
} // namespace network_utils
} // namespace blink
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