package io.undertow.attribute;
import io.undertow.security.api.SecurityContext;
import io.undertow.server.HttpServerExchange;
/**
* The remote user
*
* @author Stuart Douglas
*/
public class RemoteUserAttribute implements ExchangeAttribute {
public static final String REMOTE_USER_SHORT = "%u";
public static final String REMOTE_USER = "%{REMOTE_USER}";
public static final ExchangeAttribute INSTANCE = new RemoteUserAttribute();
private RemoteUserAttribute() {
}
@Override
public String readAttribute(final HttpServerExchange exchange) {
SecurityContext sc = exchange.getSecurityContext();
if (sc == null || !sc.isAuthenticated()) {
return null;
}
return sc.getAuthenticatedAccount().getPrincipal().getName();
}
@Override
public void writeAttribute(final HttpServerExchange exchange, final String newValue) throws ReadOnlyAttributeException {
throw new ReadOnlyAttributeException("Remote user", newValue);
}
public static final class Builder implements ExchangeAttributeBuilder {
@Override
public String name() {
return "Remote user";
}
@Override
public ExchangeAttribute build(final String token) {
if (token.equals(REMOTE_USER) || token.equals(REMOTE_USER_SHORT)) {
return RemoteUserAttribute.INSTANCE;
}
return null;
}
}
}