| /* |
| * 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 org.apache.calcite.avatica.server; |
| |
| import java.util.Objects; |
| |
| import javax.servlet.http.HttpServletRequest; |
| |
| /** |
| * A {@link RemoteUserExtractor} that extracts the remote user from an HTTP query string parameter. |
| */ |
| public class HttpQueryStringParameterRemoteUserExtractor implements RemoteUserExtractor { |
| private final String parameter; |
| |
| public HttpQueryStringParameterRemoteUserExtractor(String parameter) { |
| this.parameter = Objects.requireNonNull(parameter); |
| } |
| |
| @Override public String extract(HttpServletRequest request) throws RemoteUserExtractionException { |
| final String remoteUser = request.getParameter(parameter); |
| if (remoteUser == null) { |
| throw new RemoteUserExtractionException( |
| "Failed to extract user from HTTP query string parameter: " + parameter); |
| } |
| return remoteUser; |
| } |
| |
| } |
| |
| // End HttpQueryStringParameterRemoteUserExtractor.java |