Transfer File using Remote Object

[Ashwin Sridhar]

Hi,

I have been transferring files from middle-tier to flex using HttpService. I am trying to migrate my work to remote object. I guess there isnt any way we could transfer files using remote object from middle tier. Could someone confirm me this.

[Ashwin Sridhar]

Any suggestions on this

[Booma Devi]

Hi,

The below code can help others.. Using RemoteObject, we can transfer the file in flex...

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="creationCompleteHandler(event)">

<mx:Script>

<![CDATA[
import flash.net.FileReference;
import mx.rpc.events.FaultEvent;
import mx.rpc.events.ResultEvent;
import flash.utils.ByteArray;
import mx.controls.Alert;
import mx.events.FlexEvent;

private var fileReference:FileReference ;
private var byteArray:ByteArray;


private function creationCompleteHandler(event:FlexEvent):void
{
	//The FileReference class provides a means to upload and download files between a 
	//user's computer and a server. An operating-system dialog box prompts the user to 
	//select a file to upload or a location for download.
	fileReference=new FileReference();
	fileReference.addEventListener(Event.SELECT, fileReference_selectHandler);
}

private function btnBrowse_clickHandler(event:MouseEvent):void {

//The browse() method opens an operating-system dialog box that prompts the user to 
//select a file for upload. The FileReference.browse() method lets the user select a single file;
fileReference.browse();
}

private function fileReference_selectHandler(event:Event):void
{
	//FileReference.upload() method to upload one file at a time
	fileReference.load();
	lblPath.text=fileReference.name;
	fileLocation.text=fileReference.name;

}


private function btnUpload_ClickHandler(event:MouseEvent):void{
	
 var name:String=fileReference.name;

var content:ByteArray=new ByteArray();
fileReference.data.readBytes(content,0,fileReference.data.length);
fileUploadCR.token=javaObj.uploadFile(name,content);
}

private function faultHandler(event:FaultEvent):void
		{
			Alert.show(event.fault.message,"Error in File Upload");
		}
		
		private function fileUploadCR_resultHandler(event:ResultEvent):void
		{
			event.result as String; 
			Alert.show("File Uploaded Successfully");
		}


]]>

</mx:Script>

<mx:RemoteObject id="javaObj" destination="fileUtilsService"/>

<mx:CallResponder id="fileUploadCR" result="fileUploadCR_resultHandler(event)" fault="faultHandler(event);"/>

	
<mx:Panel title="Uploader">
<mx:Text text="Click the ‘Browse’ button to search the file that one wants to upload" width="100%"/>
<mx:Form>
<mx:FormItem label="File to upload" direction="horizontal" required="true">

<mx:TextInput id="fileLocation" width="300" editable="false" color="#001234"/>
<mx:Button id="browseButton" label="Browse" click="btnBrowse_clickHandler(event)"/>
</mx:FormItem>
<mx:FormItem label="">
<mx:Button id="uploadButton" label="Upload" click="btnUpload_ClickHandler(event)"/>
</mx:FormItem>
<mx:FormItem label="Upload status">
<mx:Label id="lblPath" width="200"/>
<mx:Label id="uploadStatus"  text="Select a file to upload"></mx:Label>
</mx:FormItem>
</mx:Form>
</mx:Panel>
</mx:Application>



Java Part:

firstTest.java

package com.net.remote;

import java.io.*;
import java.io.FileOutputStream;
import java.util.ResourceBundle;
import java.util.Locale;

import java.io.IOException;

public class firstTest {
	public static String uploadFile(String name,
			byte[] content) throws Exception {
		ResourceBundle rb = ResourceBundle.getBundle("com.net.remote.serverpath",Locale.US);
		String directory=rb.getString("serverPath");
		System.out.println("Tomcat Path is"+directory);
		File file = new File(directory);
		if (!file.exists()) {
			file.mkdir();
		}
		name = directory + "/" + name;
		File fileToUpload = new File(name);
		try {
			FileOutputStream fos = new FileOutputStream(fileToUpload);
			fos.write(content);
			fos.close();
		} catch (IOException ex) {
			return "Error" + ex.getMessage();
		}
		return "file Uploaded";
	}
}

serverpath.properties file created under the package com.net.remote (java src also located in this directory)

serverPath=C:\\\\apache-tomcat-6.0.20\\Files(DirectoryName-->Files)


Remoting-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<service id="remoting-service" class="flex.messaging.services.RemotingService">
<default-channels>
<channel ref="my-amf"/>
</default-channels>
<adapters>
<adapter-definition id="java-object" class="flex.messaging.services.remoting.adapters.JavaAdapter" default="true"/>
</adapters>
<destination id="fileUtilsService">
<properties>
<source>com.net.remote.firstTest</source>
<scope>session</scope>
</properties>
</destination>
</service>

services-config.xml

<?xml version="1.0" encoding="UTF-8"?>
<services-config>
	<services>
		<service-include file-path="remoting-config.xml" />
	</services>
	<security>
		<login-command class="flex.messaging.security.TomcatLoginCommand" server="Tomcat" />
	</security>
	<channels>
		<channel-definition id="my-amf"	class="mx.messaging.channels.AMFChannel">
			<endpoint url="http://{server.name}:{server.port}/{context.root}/messagebroker/amf" class="flex.messaging.endpoints.AMFEndpoint" />
		</channel-definition>
	</channels>
	
</services-config>


web.xml

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
  
  <listener>
    <listener-class>flex.messaging.HttpFlexSession</listener-class>
  </listener>
  <display-name>HelloRemote</display-name>
  <servlet>
    <servlet-name>MessageBrokerServlet</servlet-name>
    <servlet-class>flex.messaging.MessageBrokerServlet</servlet-class>
    <init-param>
      <param-name>services.configuration.file</param-name>
      <param-value>/WEB-INF/flex/services-config.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>MessageBrokerServlet</servlet-name>
    <url-pattern>/messagebroker/*</url-pattern>
  </servlet-mapping>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
</web-app>