| /* |
| * 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.knox.gateway.svcregfunc.impl; |
| |
| import org.apache.knox.gateway.filter.rewrite.spi.UrlRewriteContext; |
| import org.apache.knox.gateway.filter.rewrite.spi.UrlRewriteFunctionProcessor; |
| import org.apache.knox.gateway.svcregfunc.api.ServiceUrlFunctionDescriptor; |
| |
| import java.net.URI; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| public class ServiceUrlFunctionProcessor |
| extends ServiceRegistryFunctionProcessorBase<ServiceUrlFunctionDescriptor> |
| implements UrlRewriteFunctionProcessor<ServiceUrlFunctionDescriptor> { |
| |
| @Override |
| public String name() { |
| return ServiceUrlFunctionDescriptor.FUNCTION_NAME; |
| } |
| |
| @Override |
| public List<String> resolve( UrlRewriteContext context, List<String> parameters ) throws Exception { |
| List<String> results = null; |
| if( parameters != null ) { |
| results = new ArrayList<>( parameters.size() ); |
| for( String parameter : parameters ) { |
| parameter = resolve( parameter ); |
| results.add( parameter ); |
| } |
| } |
| return results; |
| } |
| |
| private String resolve( String parameter ) throws Exception { |
| String url = lookupServiceUrl( parameter ); |
| if( url != null ) { |
| URI outputUri; |
| URI inputUri = new URI( url ); |
| String host = inputUri.getHost(); |
| outputUri = new URI( inputUri.getScheme(), inputUri.getUserInfo(), host, inputUri.getPort(), inputUri.getPath(), inputUri.getQuery(), inputUri.getFragment() ); |
| parameter = outputUri.toString(); |
| } |
| return parameter; |
| } |
| } |
| |