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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.jdisc.http.filter.security.misc;
import com.google.common.net.InetAddresses;
import com.yahoo.jdisc.Response;
import com.yahoo.jdisc.http.filter.DiscFilterRequest;
import com.yahoo.jdisc.http.filter.security.base.JsonSecurityRequestFilterBase;
import java.net.InetAddress;
import java.util.Optional;
/**
* A security filter that only allows self-originating requests.
*
* @author mpolden
* @author bjorncs
*/
@SuppressWarnings("unused") // Injected
public class LocalhostFilter extends JsonSecurityRequestFilterBase {
@Override
protected Optional<ErrorResponse> filter(DiscFilterRequest request) {
InetAddress remoteAddr = InetAddresses.forString(request.getRemoteAddr());
if (!remoteAddr.isLoopbackAddress() && !request.getRemoteAddr().equals(request.getLocalAddr())) {
return Optional.of(new ErrorResponse(
Response.Status.UNAUTHORIZED,
String.format("%s %s denied for %s: Unauthorized host", request.getMethod(),
request.getUri().getPath(), request.getRemoteAddr())));
}
return Optional.empty();
}
}
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