001package org.apache.turbine.services.jsonrpc; 002 003/* 004 * Licensed to the Apache Software Foundation (ASF) under one 005 * or more contributor license agreements. See the NOTICE file 006 * distributed with this work for additional information 007 * regarding copyright ownership. The ASF licenses this file 008 * to you under the Apache License, Version 2.0 (the 009 * "License"); you may not use this file except in compliance 010 * with the License. You may obtain a copy of the License at 011 * 012 * http://www.apache.org/licenses/LICENSE-2.0 013 * 014 * Unless required by applicable law or agreed to in writing, 015 * software distributed under the License is distributed on an 016 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY 017 * KIND, either express or implied. See the License for the 018 * specific language governing permissions and limitations 019 * under the License. 020 */ 021 022import java.io.CharArrayWriter; 023 024import javax.servlet.http.HttpServletRequest; 025 026import org.apache.logging.log4j.LogManager; 027import org.apache.logging.log4j.Logger; 028import org.jabsorb.JSONRPCBridge; 029import org.jabsorb.JSONRPCResult; 030import org.json.JSONArray; 031import org.json.JSONException; 032import org.json.JSONObject; 033 034/** 035 * Process a JSON RPC call 036 * 037 * @author <a href="mailto:seade@backstagetech.com.au">Scott Eade</a> 038 */ 039public class JSONProcessor 040{ 041 /** Log. */ 042 private static Logger log = LogManager.getLogger(JSONProcessor.class); 043 044 /** 045 * Process a JSON RPC call 046 * @param cdata the JSON data 047 * @param json_bridge the {@link JSONRPCBridge} object 048 * @param request the request 049 * @return the return object of the JSON RPC call 050 */ 051 public static Object processCall(CharArrayWriter cdata, JSONRPCBridge json_bridge, HttpServletRequest request) 052 { 053 // Process the request 054 JSONObject json_req = null; 055 Object json_res = null; 056 try 057 { 058 json_req = new JSONObject(cdata.toString()); 059 if (log.isDebugEnabled()) 060 { 061 String methodName = json_req.getString("method"); 062 JSONArray arguments = json_req.getJSONArray("params"); 063 064 // If this a CallableReference it will have a non-zero objectID 065 int object_id = json_req.optInt("objectID"); 066 StringBuilder sb = new StringBuilder(".doprocessCall(): call "); 067 if (object_id != 0) 068 { 069 sb.append("objectID=").append(object_id).append(" "); 070 } 071 sb.append(methodName).append("(").append(arguments).append(")"); 072 log.debug(sb.toString()); 073 } 074 //json_res = json_bridge.call(new Object[] {request}, object_id, methodName, arguments); 075 json_res = json_bridge.call(new Object[] {request}, json_req); 076 } 077 catch (JSONException e) 078 { 079 log.error(".processCall(): can't parse call: {}", cdata, e); 080 json_res = JSONRPCResult.MSG_ERR_PARSE; 081 } 082 // Write the response 083 log.debug(".processCall(): returns ", json_res::toString); 084 return json_res; 085 } 086 087}