flex upload download avec blazeds

**smh_master** · 27/04/2010, 01h44

Bonjour,
j'ai trouvé sur un blog, un projet flex pour upload et download avec java via blazeds mais j'arrive pas à le faire tourner.
voici les codes :
FileUtils.java

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import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.nio.channels.FileChannel;
import java.util.ArrayList;
import java.util.List;
 
import org.springframework.flex.remoting.RemotingDestination;
import org.springframework.flex.remoting.RemotingInclude;
import org.springframework.stereotype.Service;
 
@Service
@RemotingDestination
public class FileUtils {
 
	@RemotingInclude
	public String doUpload(byte[] bytes, String fileName) throws Exception {
		// fileName = System.getProperty("java.io.tmpdir") + "/" + fileName;
		fileName = "c:/myfile/" + fileName;
		System.out.println(fileName);
		File f = new File(fileName);
		FileOutputStream fos = new FileOutputStream(f);
		fos.write(bytes);
		fos.close();
		return "success";
	}
 
	@RemotingInclude
	public List getDownloadList() {
		// File dir = new File(System.getProperty("java.io.tmpdir"));
		File dir = new File("c:/myfile/");
		String[] children = dir.list();
		List dirList = new ArrayList();
		if (children == null) {
			// Either dir does not exist or is not a directory
		} else {
			for (int i = 0; i < children.length; i++) {
				// Get filename of file or directory
				dirList.add(children[i]);
			}
		}
		return dirList;
	}
 
	@RemotingInclude
	public byte[] doDownload(String fileName) {
		FileInputStream fis;
		byte[] data = null;
		FileChannel fc;
 
		try {
			/*fis = new FileInputStream(System.getProperty("java.io.tmpdir")
					+ "/" + fileName);*/
			fis = new FileInputStream("c:/myfile/" + fileName);
			fc = fis.getChannel();
			data = new byte[(int) (fc.size())];
			ByteBuffer bb = ByteBuffer.wrap(data);
			fc.read(bb);
		} catch (FileNotFoundException e) {
			// TODO
		} catch (IOException e) {
			// TODO
		}
		return data;
	}
}

Download.mxml

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<?xml version="1.0" encoding="utf-8"?>
<mx:Panel xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical" 
	width="100%" height="100%" title="Download Files">
 
	<mx:Script>
		<![CDATA[
			import mx.collections.ArrayCollection;
			import mx.rpc.events.FaultEvent;
			import mx.rpc.events.ResultEvent;
			import mx.rpc.AsyncToken;
 
			private var UploadFiles:Array = new Array();
			private var UploadFilesColl:ArrayCollection = new ArrayCollection();
			private var fileData:ByteArray = new ByteArray();
			private var fileName:String;
 
 
	  		private function uploadResultHandler(event:ResultEvent):void
	  		{
	  		  if ( event.token.kind == "remoteFileList") {	
	              UploadFilesColl = event.result as ArrayCollection;
	              for ( var i:int = 0 ; i <  UploadFilesColl.length ; i++ ) {
	                UploadFiles.push({  name:UploadFilesColl[i]
	                                 ,  status:"initial"});
	              }
	              listFiles.dataProvider = UploadFiles;
              } else  {
              	  fileData = event.result as ByteArray;
              	  fileName = event.token.kind;
              	  for ( var b:int = 0 ; b <  UploadFiles.length ; b++ ) {
                  if( UploadFiles[b].name == event.token.kind ) {
                  	UploadFiles[b].status = "Ready";
	   				listFiles.dataProvider  = UploadFiles;
                  	break;
                  }
                }
 
              }
	  		}
 
	  		private function faultResultHandler(event:FaultEvent):void
	  		{
	  		}
 
	  		private function saveFile(event:Event):void
	  		{
 	  			var fileReference:FileReference = new FileReference();
 	  			fileReference.save(fileData,fileName);
	  		}
 
	  		private function getRemoteFiles(event:Event):void
	  		{
   				var token:AsyncToken = AsyncToken(remoteDownload.getDownloadList());
           		token.kind = "remoteFileList";
	  		}
 
	  		private function getDownload(event:Event):void
	  		{
   				var token:AsyncToken = AsyncToken(
   				    remoteDownload.doDownload(listFiles.selectedItem.name));
           		token.kind = listFiles.selectedItem.name;
	  		}
		]]>
	</mx:Script>
 
 
	<mx:RemoteObject id="remoteDownload" destination="FileUtils" 
		result="uploadResultHandler(event)"
		fault="faultResultHandler(event)">
 
		<mx:channelSet>
			<mx:ChannelSet>
				<mx:AMFChannel uri="http://localhost:8080/messagebroker/amf"/>
			</mx:ChannelSet>
		</mx:channelSet>
 
	</mx:RemoteObject>
 
 
	<mx:Canvas width="100%" height="100%">
		<mx:DataGrid id="listFiles" left="0" top="0" bottom="0" right="0"
			verticalScrollPolicy="on"
			draggableColumns="false" resizableColumns="false" sortableColumns="false">
			<mx:columns>
				<mx:DataGridColumn headerText="File" width="150" dataField="name" wordWrap="true"/>
				<mx:DataGridColumn headerText="Status" width="50" dataField="status" textAlign="right"/>
			</mx:columns>
 
		</mx:DataGrid>
	</mx:Canvas>
	<mx:ControlBar horizontalAlign="center" verticalAlign="middle">
		<mx:Button id="btnList" toolTip="List remote files" 
			width="150" 
			label="Get Remote Files"
			click="getRemoteFiles(event)"/>
		<mx:Button id="btnRetrieve" toolTip="Retrieve file" 
			 width="150" click="getDownload(event)" label="Retrieve File"/>
		<mx:Button id="btnSave" toolTip="Save file" 
			 width="150" click="saveFile(event)" label="Save File"/>
	</mx:ControlBar>
 
</mx:Panel>

Upload.mxml

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<?xml version="1.0" encoding="utf-8"?>
<mx:Panel xmlns:mx="http://www.adobe.com/2006/mxml" 
	layout="vertical" width="100%"  height="100%"
	title="Upload Files">
 
 
	<mx:Script>
		<![CDATA[
			import mx.rpc.AsyncToken;
			import mx.rpc.events.FaultEvent;
			import mx.rpc.events.ResultEvent;
 
			private var refUploadFile:FileReference;
 
			private var UploadFiles:Array = new Array();
 
 
			// Called to add file(s) for upload
			private function addFiles():void {
				refUploadFile = new  FileReference();
	  			refUploadFile.browse();
	  			refUploadFile.addEventListener(Event.SELECT,onFileSelect);
	  			refUploadFile.addEventListener(Event.COMPLETE,onFileComplete);
			}
 
			// Called when a file is selected
			private function onFileSelect(event:Event):void {
				UploadFiles.push({  name:refUploadFile.name,
									size:formatFileSize(refUploadFile.size),
									status:"initial"});
				listFiles.dataProvider  = UploadFiles;
				listFiles.selectedIndex = UploadFiles.length - 1;
 
                refUploadFile.load();
                for ( var i:int = 0 ; i <  UploadFiles.length ; i++ ) {
                  if( UploadFiles[i].name == refUploadFile ) {
                  	UploadFiles[i].status = "loaded";
	   				listFiles.dataProvider  = UploadFiles;
                  	break;
                  }
                }
			}
 
			// Called to format number to file size
			private function formatFileSize(numSize:Number):String {
				var strReturn:String;
				numSize = Number(numSize / 1000);
				strReturn = String(numSize.toFixed(1) + " KB");
				if (numSize > 1000) {
					numSize = numSize / 1000;
					strReturn = String(numSize.toFixed(1) + " MB");
					if (numSize > 1000) {
						numSize = numSize / 1000;
						strReturn = String(numSize.toFixed(1) + " GB");
					}
				}				
				return strReturn;
			}
 
 
 
	  		private function onFileComplete(event:Event):void
	  		{
				refUploadFile = event.currentTarget as FileReference;
				var data:ByteArray = new ByteArray();
				refUploadFile.data.readBytes(data,0,refUploadFile.data.length);
 
   				var token:AsyncToken = AsyncToken(
   				                          remoteUpload.doUpload(data, refUploadFile.name)
   				                          );
 
           		token.kind = refUploadFile.name;
 
                for ( var i:int = 0 ; i <  UploadFiles.length ; i++ ) {
                  if( UploadFiles[i].name == refUploadFile ) {
                  	UploadFiles[i].status = "upload";
	   				listFiles.dataProvider  = UploadFiles;
                  	break;
                  }
                }
	  		}
 
	  		private function uploadResultHandler(event:ResultEvent):void
	  		{
                for ( var i:int = 0 ; i <  UploadFiles.length ; i++ ) {
                  if( UploadFiles[i].name == event.token.kind ) {
                  	UploadFiles[i].status = "finished";
	   				listFiles.dataProvider  = UploadFiles;
                  	break;
                  }
                }
	  		}
 
	  		private function faultResultHandler(event:FaultEvent):void
	  		{
                for ( var i:int = 0 ; i <  UploadFiles.length ; i++ ) {
                  if( UploadFiles[i].name == event.token.kind ) {
                  	UploadFiles[i].status = "error";
	   				listFiles.dataProvider  = UploadFiles;
                  	break;
                  }
                }
	  		}
 
 
		]]>
	</mx:Script>
 
	<mx:RemoteObject id="remoteUpload" destination="FileUtils" 
		result="uploadResultHandler(event)"
		fault="faultResultHandler(event)">
 
		<mx:channelSet>
			<mx:ChannelSet>
				<mx:AMFChannel uri="http://localhost:8080/messagebroker/amf"/>
			</mx:ChannelSet>
		</mx:channelSet>
 
	</mx:RemoteObject>
 
 
	<mx:Canvas width="100%" height="100%">
		<mx:DataGrid id="listFiles" left="0" top="0" bottom="0" right="0"
			allowMultipleSelection="true" verticalScrollPolicy="on" 
			draggableColumns="false" resizableColumns="false" sortableColumns="false">
			<mx:columns>
				<mx:DataGridColumn headerText="Files" width="150" dataField="name" wordWrap="true"/>
				<mx:DataGridColumn headerText="Size" width="50" dataField="size" textAlign="right"/>
				<mx:DataGridColumn headerText="Status" width="50" dataField="status" textAlign="right"/>
			</mx:columns>
		</mx:DataGrid>
	</mx:Canvas>
	<mx:ControlBar horizontalAlign="center" verticalAlign="middle">
		<mx:Button id="btnAdd" toolTip="Add file(s)" click="addFiles()" 
			label="Upload Files" width="150"/>
	</mx:ControlBar>
 
 
</mx:Panel>

et enfin flexUploadDownload.mxml

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<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" 
	xmlns:com="components.*" creationComplete="init()">
 
 
	<mx:Canvas width="500" height="450" horizontalCenter="0" verticalCenter="0">
	  <mx:VBox>
		<com:Upload   width="500" height="200"/>
		<com:Download width="500" height="200"/>
	  </mx:VBox>
	</mx:Canvas>
 
 
</mx:Application>

s'agit-il d'un problème de configuration sachant que j'utilise Flash Builder4 (flex sdk4) et flash player 10.0.0 ?
merci de me porter conseil.

**ellene** · 27/04/2010, 06h20

Bonjour,

Tu dis que ça ne fonctionne pas mais as tu une erreur particulière ? Le service n'est pas appelé ? As tu une belle stackTrace côté Java ?

**smh_master** · 27/04/2010, 16h08

bonjour,
coté java et avec blazeds j'arrive à trouver mes méthodes dans flex:
- doUpload
- doDowload
- getDownloadList
et avec le bouton "test" proposée avec flash builder 4 j'arrive à tester mes méthodes et ça marche parfaitement.

mais coté flex c'est supposé appeler ces méthodes distantes alors que ça se passe rien comme si s'était une simple interface sans appel à ces fonctions.

si vous voulez je pourrais ajouter le fichier AS généré lors de la création de mon service, peut être que le problème arrive de ce fichier

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/**
 * This is a generated class and is not intended for modfication.  To customize behavior
 * of this service wrapper you may modify the generated sub-class of this class - FileUtils.as.
 */
package services
{
import com.adobe.fiber.core.model_internal;
import com.adobe.fiber.services.wrapper.RemoteObjectServiceWrapper;
import com.adobe.serializers.utility.TypeUtility;
import flash.utils.ByteArray;
import mx.rpc.AbstractOperation;
import mx.rpc.AsyncToken;
import mx.rpc.remoting.Operation;
import mx.rpc.remoting.RemoteObject;
 
import mx.collections.ItemResponder;
import com.adobe.fiber.valueobjects.AvailablePropertyIterator;
 
[ExcludeClass]
internal class _Super_FileUtils extends com.adobe.fiber.services.wrapper.RemoteObjectServiceWrapper
{      
 
    // Constructor
    public function _Super_FileUtils()
    {
        // initialize service control
        _serviceControl = new mx.rpc.remoting.RemoteObject();
 
        var operations:Object = new Object();
        var operation:mx.rpc.remoting.Operation;
 
        operation = new mx.rpc.remoting.Operation(null, "doUpload");
		 operation.resultType = String; 		 
        operations["doUpload"] = operation;
 
        operation = new mx.rpc.remoting.Operation(null, "doDownload");
		 operation.resultType = ByteArray; 		 
        operations["doDownload"] = operation;
 
        operation = new mx.rpc.remoting.Operation(null, "getDownloadList");
		 operation.resultElementType = Object;
        operations["getDownloadList"] = operation;
 
 
        _serviceControl.operations = operations;   
		_serviceControl.convertResultHandler = com.adobe.serializers.utility.TypeUtility.convertResultHandler;
		destination = "fileUtils";
 
 
 
         model_internal::initialize();
    }
 
	/**
	  * This method is a generated wrapper used to call the 'doUpload' operation. It returns an mx.rpc.AsyncToken whose 
	  * result property will be populated with the result of the operation when the server response is received. 
	  * To use this result from MXML code, define a CallResponder component and assign its token property to this method's return value. 
	  * You can then bind to CallResponder.lastResult or listen for the CallResponder.result or fault events.
      *
      * @see mx.rpc.AsyncToken
      * @see mx.rpc.CallResponder 
      *
      * @return an mx.rpc.AsyncToken whose result property will be populated with the result of the operation when the server response is received.
	  */          
	public function doUpload(arg0:ByteArray, arg1:String) : mx.rpc.AsyncToken
	{
		var _internal_operation:mx.rpc.AbstractOperation = _serviceControl.getOperation("doUpload");
		var _internal_token:mx.rpc.AsyncToken = _internal_operation.send(arg0,arg1) ;
 
		return _internal_token;
	}   
 
	/**
	  * This method is a generated wrapper used to call the 'doDownload' operation. It returns an mx.rpc.AsyncToken whose 
	  * result property will be populated with the result of the operation when the server response is received. 
	  * To use this result from MXML code, define a CallResponder component and assign its token property to this method's return value. 
	  * You can then bind to CallResponder.lastResult or listen for the CallResponder.result or fault events.
      *
      * @see mx.rpc.AsyncToken
      * @see mx.rpc.CallResponder 
      *
      * @return an mx.rpc.AsyncToken whose result property will be populated with the result of the operation when the server response is received.
	  */          
	public function doDownload(arg0:String) : mx.rpc.AsyncToken
	{
		var _internal_operation:mx.rpc.AbstractOperation = _serviceControl.getOperation("doDownload");
		var _internal_token:mx.rpc.AsyncToken = _internal_operation.send(arg0) ;
 
		return _internal_token;
	}   
 
	/**
	  * This method is a generated wrapper used to call the 'getDownloadList' operation. It returns an mx.rpc.AsyncToken whose 
	  * result property will be populated with the result of the operation when the server response is received. 
	  * To use this result from MXML code, define a CallResponder component and assign its token property to this method's return value. 
	  * You can then bind to CallResponder.lastResult or listen for the CallResponder.result or fault events.
      *
      * @see mx.rpc.AsyncToken
      * @see mx.rpc.CallResponder 
      *
      * @return an mx.rpc.AsyncToken whose result property will be populated with the result of the operation when the server response is received.
	  */          
	public function getDownloadList() : mx.rpc.AsyncToken
	{
		var _internal_operation:mx.rpc.AbstractOperation = _serviceControl.getOperation("getDownloadList");
		var _internal_token:mx.rpc.AsyncToken = _internal_operation.send() ;
 
		return _internal_token;
	}   
 
}
 
}

voilà merci

**smh_master** · 11/05/2010, 11h03

en faite j'ai trouvé la solution pour ceux qui leur intéresse. Il fallait juste faire coté java :

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@Service("FileUtils")
@RemotingDestination(channels = {"my-amf"})

au lieu de :

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@Service
@RemotingDestination

flex upload download avec blazeds

Flex

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