| Classes in this File | Line Coverage | Branch Coverage | Complexity | ||||
| JSONScreen |
|
| 1.3333333333333333;1,333 |
| 1 | package org.apache.turbine.modules.screens; | |
| 2 | ||
| 3 | /* | |
| 4 | * Licensed to the Apache Software Foundation (ASF) under one | |
| 5 | * or more contributor license agreements. See the NOTICE file | |
| 6 | * distributed with this work for additional information | |
| 7 | * regarding copyright ownership. The ASF licenses this file | |
| 8 | * to you under the Apache License, Version 2.0 (the | |
| 9 | * "License"); you may not use this file except in compliance | |
| 10 | * with the License. You may obtain a copy of the License at | |
| 11 | * | |
| 12 | * http://www.apache.org/licenses/LICENSE-2.0 | |
| 13 | * | |
| 14 | * Unless required by applicable law or agreed to in writing, | |
| 15 | * software distributed under the License is distributed on an | |
| 16 | * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
| 17 | * KIND, either express or implied. See the License for the | |
| 18 | * specific language governing permissions and limitations | |
| 19 | * under the License. | |
| 20 | */ | |
| 21 | ||
| 22 | import java.io.BufferedReader; | |
| 23 | import java.io.CharArrayWriter; | |
| 24 | import java.io.InputStreamReader; | |
| 25 | import java.io.OutputStreamWriter; | |
| 26 | import java.io.PrintWriter; | |
| 27 | ||
| 28 | import javax.servlet.http.HttpServletRequest; | |
| 29 | ||
| 30 | import org.apache.turbine.pipeline.PipelineData; | |
| 31 | import org.apache.turbine.services.jsonrpc.TurbineJsonRpc; | |
| 32 | import org.apache.turbine.util.RunData; | |
| 33 | ||
| 34 | import com.metaparadigm.jsonrpc.JSONRPCBridge; | |
| 35 | ||
| 36 | /** | |
| 37 | * A Screen class for dealing with JSON-RPC requests. Typically you would | |
| 38 | * extend this class and override the doOutput() method to use TurbineJsonRpc | |
| 39 | * to register the POJOs that will provide the functions you are making | |
| 40 | * available via JSON-RPC. Use JSONSecureScreen if you need the user to be | |
| 41 | * logged in prior to executing the functions you provide. | |
| 42 | * | |
| 43 | * <p>Here is an example from a superclass: | |
| 44 | * <code> | |
| 45 | * public void doOutput(RunData data) throws Exception | |
| 46 | * { | |
| 47 | * User user = data.getUser(); | |
| 48 | * | |
| 49 | * MyJsonFunctions myFunctions = new MyJsonFunctions(user.getName()); | |
| 50 | * | |
| 51 | * // Session specific | |
| 52 | * TurbineJsonRpc.registerObject(data.getSession(), "myFunctions", myFunctions); | |
| 53 | * | |
| 54 | * // Global | |
| 55 | * //TurbineJsonRpc.registerObjectGlobal("testGlobal", testObject); | |
| 56 | * | |
| 57 | * super.doOutput(data); | |
| 58 | * } | |
| 59 | * </code> | |
| 60 | * | |
| 61 | * <p>The class MyFunctions would be something like: | |
| 62 | * <code> | |
| 63 | * public class MyJsonFunctions | |
| 64 | * { | |
| 65 | * private String getHello(String clientParameter) | |
| 66 | * { | |
| 67 | * return "Hello " + clientParameter; | |
| 68 | * } | |
| 69 | * } | |
| 70 | * </code> | |
| 71 | * | |
| 72 | * <p>This code is derived from the com.metaparadigm.jsonrpc.JSONRPCServlet | |
| 73 | * | |
| 74 | * @author brad@folkens.com | |
| 75 | * @author <a href="mailto:seade@backstagetech.com.au">Scott Eade</a> | |
| 76 | * @version $Id: JSONScreen.java 958672 2010-06-28 18:42:04Z tv $ | |
| 77 | */ | |
| 78 | 0 | public class JSONScreen extends RawScreen |
| 79 | { | |
| 80 | protected static final String JSONRPC_CONTENT_TYPE = "text/plain"; | |
| 81 | ||
| 82 | protected final static int BUFFER_SIZE = 4096; | |
| 83 | ||
| 84 | /** | |
| 85 | * @see org.apache.turbine.modules.screens.RawScreen#getContentType(org.apache.turbine.util.RunData) | |
| 86 | * @deprecated Use PipelineData version instead. | |
| 87 | */ | |
| 88 | protected String getContentType(RunData data) | |
| 89 | { | |
| 90 | 0 | return JSONRPC_CONTENT_TYPE; |
| 91 | } | |
| 92 | ||
| 93 | /** | |
| 94 | * @see org.apache.turbine.modules.screens.RawScreen#getContentType(org.apache.turbine.pipeline.PipelineData) | |
| 95 | */ | |
| 96 | protected String getContentType(PipelineData pipelineData) | |
| 97 | { | |
| 98 | 0 | return JSONRPC_CONTENT_TYPE; |
| 99 | } | |
| 100 | ||
| 101 | /** | |
| 102 | * @see org.apache.turbine.modules.screens.RawScreen#doOutput(org.apache.turbine.util.RunData) | |
| 103 | */ | |
| 104 | ||
| 105 | /** | |
| 106 | * Output the dynamic content. | |
| 107 | * | |
| 108 | * @param data The RunData object. | |
| 109 | * @deprecated Use PipelineData version instead. | |
| 110 | */ | |
| 111 | protected void doOutput(RunData data) throws Exception | |
| 112 | { | |
| 113 | 0 | data.declareDirectResponse(); |
| 114 | 0 | HttpServletRequest request = data.getRequest(); |
| 115 | ||
| 116 | //String charset = request.getCharacterEncoding(); | |
| 117 | //if(charset == null) | |
| 118 | //{ | |
| 119 | // charset = "UTF-8"; | |
| 120 | //} | |
| 121 | //BufferedReader in = new BufferedReader(new InputStreamReader(request.getInputStream(), charset)); | |
| 122 | 0 | BufferedReader in = new BufferedReader(new InputStreamReader(request.getInputStream())); |
| 123 | ||
| 124 | // Read the request | |
| 125 | 0 | CharArrayWriter cdata = new CharArrayWriter(); |
| 126 | 0 | char buf[] = new char[BUFFER_SIZE]; |
| 127 | int ret; | |
| 128 | 0 | while ((ret = in.read(buf, 0, BUFFER_SIZE)) != -1) |
| 129 | { | |
| 130 | 0 | cdata.write(buf, 0, ret); |
| 131 | } | |
| 132 | ||
| 133 | // Find the JSONRPCBridge for this session or create one | |
| 134 | // if it doesn't exist | |
| 135 | 0 | JSONRPCBridge json_bridge = TurbineJsonRpc.getBridge(data.getSession()); |
| 136 | ||
| 137 | // Process the request | |
| 138 | 0 | Object json_res = TurbineJsonRpc.processCall(cdata, json_bridge, request); |
| 139 | ||
| 140 | 0 | PrintWriter out = new PrintWriter( |
| 141 | new OutputStreamWriter(data.getResponse().getOutputStream())); | |
| 142 | 0 | out.print(json_res.toString()); |
| 143 | 0 | out.flush(); |
| 144 | 0 | out.close(); |
| 145 | 0 | } |
| 146 | } |