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/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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 nginx.unit.websocket;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* Base class for the authentication methods used by the websocket client.
*/
public abstract class Authenticator {
private static final Pattern pattern = Pattern
.compile("(\\w+)\\s*=\\s*(\"([^\"]+)\"|([^,=\"]+))\\s*,?");
/**
* Generate the authentication header that will be sent to the server.
* @param requestUri The request URI
* @param WWWAuthenticate The server auth challenge
* @param UserProperties The user information
* @return The auth header
* @throws AuthenticationException When an error occurs
*/
public abstract String getAuthorization(String requestUri, String WWWAuthenticate,
Map<String, Object> UserProperties) throws AuthenticationException;
/**
* Get the authentication method.
* @return the auth scheme
*/
public abstract String getSchemeName();
/**
* Utility method to parse the authentication header.
* @param WWWAuthenticate The server auth challenge
* @return the parsed header
*/
public Map<String, String> parseWWWAuthenticateHeader(String WWWAuthenticate) {
Matcher m = pattern.matcher(WWWAuthenticate);
Map<String, String> challenge = new HashMap<>();
while (m.find()) {
String key = m.group(1);
String qtedValue = m.group(3);
String value = m.group(4);
challenge.put(key, qtedValue != null ? qtedValue : value);
}
return challenge;
}
}
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