executioncontext20090716/framework/webapp/src/org/ofbiz/webapp/event/DojoJSONServiceEventHandler.java - ofbiz - Git at Google

 /*******************************************************************************
  * 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.ofbiz.webapp.event;

 import java.io.IOException;
 import java.io.UnsupportedEncodingException;
 import java.io.Writer;
 import java.util.List;
 import java.util.Locale;
 import java.util.Map;
 import java.util.TimeZone;

 import javax.servlet.ServletContext;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;

 import javolution.util.FastList;
 import javolution.util.FastMap;
 import net.sf.json.JSONObject;

 import org.ofbiz.base.util.UtilHttp;
 import org.ofbiz.service.DispatchContext;
 import org.ofbiz.service.GenericServiceException;
 import org.ofbiz.service.LocalDispatcher;
 import org.ofbiz.service.ModelService;
 import org.ofbiz.webapp.control.ConfigXMLReader.Event;
 import org.ofbiz.webapp.control.ConfigXMLReader.RequestMap;

 /**
  * DojoJSONServiceEventHandler - JSON Object Wrapper around the ServiceEventHandler
  *
  * This handles two issues with the Dojo version of JSON. Actually, it may only applies when a form is used to upload a file.
  * Dojo expects the json response to be wrapped in html like this:
  * <html><head></head><body><textarea style="width: 100%%; height: 100px;">{name: value, name2: value2}</textarea></body></html>
  * The other issue is that the JSONObject balks at the "byte" type of uploaded file data.
  * I solved that by making the parameters returned by the service (which also contains the input parameters)
  * valid for the output parameters defined by the service.
  */
 public class DojoJSONServiceEventHandler implements EventHandler {

     public static final String module = DojoJSONServiceEventHandler.class.getName();
     protected EventHandler service;

     public void init(ServletContext context) throws EventHandlerException {
         this.service = new ServiceEventHandler();
         this.service.init(context);
     }

     public String invoke(Event event, RequestMap requestMap, HttpServletRequest request, HttpServletResponse response) throws EventHandlerException {
         // call into the service handler for parameters parsing and invocation
         String respCode = service.invoke(null, requestMap, request, response);

         // pull out the service response from the request attribute
         Map<String, Object> attrMap = UtilHttp.getJSONAttributeMap(request);

         LocalDispatcher dispatcher = (LocalDispatcher) request.getAttribute("dispatcher");
         if (dispatcher == null) {
             throw new EventHandlerException("The local service dispatcher is null");
         }
         DispatchContext dctx = dispatcher.getDispatchContext();
         if (dctx == null) {
             throw new EventHandlerException("Dispatch context cannot be found");
         }

         // get the details for the service(s) to call
         //String mode = SYNC;
         String serviceName = null;
         Locale locale = UtilHttp.getLocale(request);
         TimeZone timeZone = UtilHttp.getTimeZone(request);
         //HttpSession session = request.getSession();
         //GenericValue userLogin = (GenericValue) session.getAttribute("userLogin");

         // make sure we have a defined service to call
         serviceName = event.invoke;
         if (serviceName == null) {
             throw new EventHandlerException("Service name (eventMethod) cannot be null");
         }
         ModelService model = null;

         try {
             model = dctx.getModelService(serviceName);
         } catch (GenericServiceException e) {
             throw new EventHandlerException("Problems getting the service model", e);
         }

         if (model == null) {
             throw new EventHandlerException("Problems getting the service model");
         }
         List<Object> errorMessages = FastList.newInstance();
         Map<String, Object> serviceContext = FastMap.newInstance();
         serviceContext = model.makeValid(attrMap, ModelService.OUT_PARAM, true, errorMessages, timeZone, locale);

         // create a JSON Object for return
         JSONObject json = JSONObject.fromObject(serviceContext);
         String jsonStr = json.toString();
         if (jsonStr == null) {
             throw new EventHandlerException("JSON Object was empty; fatal error!");
         }

         String htmlJsonStr = "<html><head></head><body><textarea style=\"width: 100%%; height: 100px;\">" + jsonStr + "</textarea></body></html>";
         // set the X-JSON content type
         response.setContentType("text/html");
         // jsonStr.length is not reliable for unicode characters
         try {
             response.setContentLength(jsonStr.getBytes("UTF8").length);
         } catch (UnsupportedEncodingException e) {
             throw new EventHandlerException("Problems with Json encoding", e);
         }

         // return the JSON String
         Writer out;
         try {
             out = response.getWriter();
             out.write(htmlJsonStr);
             out.flush();
         } catch (IOException e) {
             throw new EventHandlerException("Unable to get response writer", e);
         }

         return respCode;
     }

 }
	/*******************************************************************************
	* 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.ofbiz.webapp.event;

	import java.io.IOException;
	import java.io.UnsupportedEncodingException;
	import java.io.Writer;
	import java.util.List;
	import java.util.Locale;
	import java.util.Map;
	import java.util.TimeZone;

	import javax.servlet.ServletContext;
	import javax.servlet.http.HttpServletRequest;
	import javax.servlet.http.HttpServletResponse;

	import javolution.util.FastList;
	import javolution.util.FastMap;
	import net.sf.json.JSONObject;

	import org.ofbiz.base.util.UtilHttp;
	import org.ofbiz.service.DispatchContext;
	import org.ofbiz.service.GenericServiceException;
	import org.ofbiz.service.LocalDispatcher;
	import org.ofbiz.service.ModelService;
	import org.ofbiz.webapp.control.ConfigXMLReader.Event;
	import org.ofbiz.webapp.control.ConfigXMLReader.RequestMap;

	/**
	* DojoJSONServiceEventHandler - JSON Object Wrapper around the ServiceEventHandler
	*
	* This handles two issues with the Dojo version of JSON. Actually, it may only applies when a form is used to upload a file.
	* Dojo expects the json response to be wrapped in html like this:
	* <html><head></head><body><textarea style="width: 100%%; height: 100px;">{name: value, name2: value2}</textarea></body></html>
	* The other issue is that the JSONObject balks at the "byte" type of uploaded file data.
	* I solved that by making the parameters returned by the service (which also contains the input parameters)
	* valid for the output parameters defined by the service.
	*/
	public class DojoJSONServiceEventHandler implements EventHandler {

	public static final String module = DojoJSONServiceEventHandler.class.getName();
	protected EventHandler service;

	public void init(ServletContext context) throws EventHandlerException {
	this.service = new ServiceEventHandler();
	this.service.init(context);
	}

	public String invoke(Event event, RequestMap requestMap, HttpServletRequest request, HttpServletResponse response) throws EventHandlerException {
	// call into the service handler for parameters parsing and invocation
	String respCode = service.invoke(null, requestMap, request, response);

	// pull out the service response from the request attribute
	Map<String, Object> attrMap = UtilHttp.getJSONAttributeMap(request);

	LocalDispatcher dispatcher = (LocalDispatcher) request.getAttribute("dispatcher");
	if (dispatcher == null) {
	throw new EventHandlerException("The local service dispatcher is null");
	}
	DispatchContext dctx = dispatcher.getDispatchContext();
	if (dctx == null) {
	throw new EventHandlerException("Dispatch context cannot be found");
	}

	// get the details for the service(s) to call
	//String mode = SYNC;
	String serviceName = null;
	Locale locale = UtilHttp.getLocale(request);
	TimeZone timeZone = UtilHttp.getTimeZone(request);
	//HttpSession session = request.getSession();
	//GenericValue userLogin = (GenericValue) session.getAttribute("userLogin");

	// make sure we have a defined service to call
	serviceName = event.invoke;
	if (serviceName == null) {
	throw new EventHandlerException("Service name (eventMethod) cannot be null");
	}
	ModelService model = null;

	try {
	model = dctx.getModelService(serviceName);
	} catch (GenericServiceException e) {
	throw new EventHandlerException("Problems getting the service model", e);
	}

	if (model == null) {
	throw new EventHandlerException("Problems getting the service model");
	}
	List<Object> errorMessages = FastList.newInstance();
	Map<String, Object> serviceContext = FastMap.newInstance();
	serviceContext = model.makeValid(attrMap, ModelService.OUT_PARAM, true, errorMessages, timeZone, locale);

	// create a JSON Object for return
	JSONObject json = JSONObject.fromObject(serviceContext);
	String jsonStr = json.toString();
	if (jsonStr == null) {
	throw new EventHandlerException("JSON Object was empty; fatal error!");
	}

	String htmlJsonStr = "<html><head></head><body><textarea style=\"width: 100%%; height: 100px;\">" + jsonStr + "</textarea></body></html>";
	// set the X-JSON content type
	response.setContentType("text/html");
	// jsonStr.length is not reliable for unicode characters
	try {
	response.setContentLength(jsonStr.getBytes("UTF8").length);
	} catch (UnsupportedEncodingException e) {
	throw new EventHandlerException("Problems with Json encoding", e);
	}

	// return the JSON String
	Writer out;
	try {
	out = response.getWriter();
	out.write(htmlJsonStr);
	out.flush();
	} catch (IOException e) {
	throw new EventHandlerException("Unable to get response writer", e);
	}

	return respCode;
	}

	}