/*
* JBoss, Home of Professional Open Source.
* Copyright 2014 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package io.undertow.server.handlers;
import java.io.IOException;
import io.undertow.server.HttpServerExchange;
/**
* Server side upgrade handler. This handler can inspect the request and modify the response.
* <p>
* If the request does not meet this handlers requirements it should return false to allow
* other upgrade handlers to inspect the request.
* <p>
* If the request is invalid (e.g. security information is invalid) this should thrown an IoException.
* if this occurs no further handlers will be tried.
*
* @author Stuart Douglas
*/
public interface HttpUpgradeHandshake {
/**
* Validates an upgrade request and returns any extra headers that should be added to the response.
*
* @param exchange the server exchange
* @return <code>true</code> if the handshake is valid and should be upgraded. False if it is invalid
* @throws IOException If the handshake is invalid
*/
boolean handleUpgrade(final HttpServerExchange exchange) throws IOException;
}