jdisc-security-filters/src/main/java/com/yahoo/jdisc/http/filter/security/cors/CorsResponseFilter.java


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// Copyright 2018 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.jdisc.http.filter.security.cors;

import com.google.inject.Inject;
import com.yahoo.jdisc.AbstractResource;
import com.yahoo.jdisc.http.filter.DiscFilterResponse;
import com.yahoo.jdisc.http.filter.RequestView;
import com.yahoo.jdisc.http.filter.SecurityResponseFilter;
import com.yahoo.yolean.chain.Provides;

import java.util.HashSet;
import java.util.Set;


/**
 * @author gv
 * @author Tony Vaagenes
 * @author bjorncs
 */
@Provides("CorsResponseFilter")
public class CorsResponseFilter extends AbstractResource implements SecurityResponseFilter {

    private final Set<String> allowedUrls;

    @Inject
    public CorsResponseFilter(CorsFilterConfig config) {
        this.allowedUrls = new HashSet<>(config.allowedUrls());
    }

    @Override
    public void filter(DiscFilterResponse response, RequestView request) {
        CorsLogic.createCorsResponseHeaders(request.getFirstHeader("Origin").orElse(null), allowedUrls)
                .forEach(response::setHeader);
    }

}