| /* |
| * 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.apisix.plugin.runner.filter; |
| |
| import com.google.gson.Gson; |
| import org.apache.apisix.plugin.runner.HttpRequest; |
| import org.apache.apisix.plugin.runner.HttpResponse; |
| import org.springframework.stereotype.Component; |
| import reactor.core.publisher.Mono; |
| |
| import java.util.HashMap; |
| import java.util.Map; |
| |
| @Component |
| public class RewriteRequestDemoFilter implements PluginFilter { |
| |
| @Override |
| public String name() { |
| /* It is recommended to keep the name of the filter the same as the class name. |
| Configure the filter to be executed on apisix's routes in the following format |
| |
| { |
| "uri": "/hello", |
| "plugins": { |
| "ext-plugin-pre-req": { |
| "conf": [{ |
| "name": "RewriteRequestDemoFilter", |
| "value": "bar" |
| }] |
| } |
| }, |
| "upstream": { |
| "nodes": { |
| "127.0.0.1:1980": 1 |
| }, |
| "type": "roundrobin" |
| } |
| } |
| |
| The value of name in the configuration corresponds to the value of return here. |
| */ |
| |
| return "RewriteRequestDemoFilter"; |
| } |
| |
| @Override |
| public Mono<Void> filter(HttpRequest request, HttpResponse response, PluginFilterChain chain) { |
| /* |
| * If the conf you configured is of type json, you can convert it to Map or json. |
| */ |
| |
| String configStr = request.getConfig(this); |
| Gson gson = new Gson(); |
| Map<String, Object> conf = new HashMap<>(); |
| conf = gson.fromJson(configStr, conf.getClass()); |
| |
| /* |
| * You can use the parameters in the configuration. |
| */ |
| |
| // note: the path to the rewrite must start with '/' |
| request.setPath((String) conf.get("rewrite_path")); |
| request.setHeader((String) conf.get("conf_header_name"), (String) conf.get("conf_header_value")); |
| /* note: The value of the parameter is currently a string type. |
| If you need the json type, you need the upstream service to parse the string value to json. |
| For example, if the arg is set as below |
| request.setArg("new arg", "{\"key1\":\"value1\",\"key2\":2}"); |
| |
| The arg received by the upstream service will be as below |
| "new arg": "{\"key1\":\"value1\",\"key2\":2}" |
| */ |
| request.setArg((String) conf.get("conf_arg_name"), (String) conf.get("conf_arg_value")); |
| |
| return chain.filter(request, response); |
| } |
| } |