Source/WebCore/loader/OriginAgentClusterPolicy.cpp

/*
 * Copyright (C) 2026 Apple Inc. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
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#include "config.h"
#include "OriginAgentClusterPolicy.h"

#include "HTTPHeaderNames.h"
#include "RFC8941.h"
#include "ResourceResponse.h"
#include "ScriptExecutionContext.h"
#include "SecurityOrigin.h"
#include "Settings.h"

namespace WebCore {

// https://html.spec.whatwg.org/multipage/origin.html#initialise-the-document-object
// (the Origin-Agent-Cluster portion)
OriginKeyed obtainOriginAgentClusterPolicy(const ResourceResponse& response, const ScriptExecutionContext* context)
{
    if (context && !context->settingsValues().originAgentClusterEnabled)
        return OriginKeyed::No;
    if (!SecurityOrigin::create(response.url())->isPotentiallyTrustworthy())
        return OriginKeyed::No;

    auto parsingResult = RFC8941::parseItemStructuredFieldValue(response.httpHeaderField(HTTPHeaderName::OriginAgentCluster));
    if (!parsingResult)
        return OriginKeyed::No;

    auto* boolValue = std::get_if<bool>(&parsingResult->first);
    return boolValue && *boolValue ? OriginKeyed::Yes : OriginKeyed::No;
}

} // namespace WebCore