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POMultiple downloads in flex
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2009-12-17T04:40:13.647
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can someone help me? I want to download files from the server side to client side without prompting a window to the user to download when any updates happen at server side. Right now I am using urlstream class but first file is downloading completely rest of the files contents downloading partially. edit Code sample taken from other post. Warning: it's a huuuge chunk o'code. <pre><code><?xml version="1.0" encoding="utf-8"?> <mx:WindowedApplication xmlns:mx="http://www.adobe.com/2006/mxml" xmlns:MyComp="client.components.*" layout="absolute" height="554" width="817" backgroundGradientAlphas="[1.0, 0.0]" backgroundGradientColors="[#ABA9A7, #03143B]" creationComplete="init();"> <mx:Script> <![CDATA[ import flash.system.Capabilities; import mx.collections.XMLListCollection; import mx.rpc.Fault; import mx.rpc.events.ResultEvent; import mx.rpc.events.FaultEvent; import mx.events.ListEvent; import mx.collections.ArrayCollection; import flash.data.SQLConnection; import flash.errors.SQLError; import flash.events.SQLErrorEvent; import flash.events.SQLEvent; import flash.filesystem.File; import flash.errors.SQLError; import mx.controls.Alert; import mx.events.CloseEvent; import flash.net.*; import flash.filesystem.*; import flash.events.OutputProgressEvent; private var urlstring:String="server path"; private var urlReq:URLRequest; private var urlStream:URLStream; private var fileData:ByteArray = new ByteArray(); private var sqlConnection:SQLConnection =null; private var sql:String; private var result:SQLResult; private var stmt:SQLStatement=null; private var catid:int=0; private var testcollection:Array=new Array(); [Bindable] private var DGArray:ArrayCollection = new ArrayCollection(testcollection); private var number:int; private var selection:Boolean=false; private var timestamp:String; private var xmlcol:XMLListCollection; private var categoryid:int=0; private var numbers:int; private var index:int=0; private var findex:int=0; private var nupdates:int=0; private var newfile:String=""; private var selectstream:int=1; private var startdownload:Boolean=false; public function init():void{ userRequest.send(null); sqlConnection= new SQLConnection(); //create a new db-file in the application storage location var file:File = new File("app:/E-catalog.db"); sqlConnection.addEventListener(SQLEvent.OPEN,dbOpenedHandler); sqlConnection.addEventListener(SQLErrorEvent.ERROR,dbErrorHandler); sqlConnection.open(file); getData(); } public function loaded(event:Event):void { urlStream.readBytes(fileData, 0, urlStream.bytesAvailable); for(var x:int=0;x<nupdates;x++){ var filename:Object=xmlcollection.getItemAt(x); newfile=filename['pdfimage']; writeAirFile(); } } public function writeAirFile():void { /* var obj:Object=new Object; startdownload=true; var file:File = File.applicationStorageDirectory.resolvePath(newfile); fileStream = new FileStream(); fileStream.openAsync(file, FileMode.WRITE); fileStream.writeBytes(fileData, 0, fileData.length); fileStream.addEventListener(Event.COMPLETE,progressHandler,true,10,true); for(var x:int=0;x<fileData.length;x++){} startdownload=false; fileStream.close(); */ } public function progressHandler(event:Event){ Alert.show("File downloading"); } public function dbOpenedHandler(event:SQLEvent):void{} public function dbErrorHandler(error:SQLError):void{} public function getData():void{ sql = "SELECT STRFTIME('%Y-%m-%d %H:%M:%S',lupdated_dt)as lupdated_dt FROM update_mas where delflag=0 "; stmt = new SQLStatement(); stmt.sqlConnection = sqlConnection; stmt.text = sql; stmt.addEventListener(SQLEvent.RESULT, selectResult); stmt.addEventListener(SQLErrorEvent.ERROR, selectError); stmt.execute(); } public function selectResult(event:SQLEvent){ DGArray.removeAll(); number=1; var result = stmt.getResult(); var numRows = result.data.length; for (var i = 0; i < numRows; i++){ for(var col:String in result.data[i]){ timestamp=result.data[i][col]; } } updateRequest.url="serverpath ?time="+timestamp+""; updateRequest.send(null); } public function selectError(event):void{ stmt.removeEventListener(SQLEvent.RESULT, selectResult); stmt.removeEventListener(SQLErrorEvent.ERROR, selectError); Alert.show("SELECT error:"); } public function displayPOPUP(event:ResultEvent):void{ nupdates=((int)(event.result)); if(nupdates==0){ }else{ selection=Alert.show(""+nupdates+"Updates available", "UPDATES", Alert.YES|Alert.NO, this, alertClickHandler); } } private function alertClickHandler(event:CloseEvent):void { if (event.detail==Alert.YES){ downloadRequest.url="serverpath ?time="+timestamp; downloadRequest.send(null); }else Alert.show("download cancelled"); } public function displayResult(event:ResultEvent):void{ var record:String=""; sql=""; for(index=0;index<xmlcollection.length;index++){ var category:Object=xmlcollection.getItemAt(index); sql="select Id FROM CATEGORY where delflag=0 and cat_name='"+category['catname']+"'"; stmt = new SQLStatement(); stmt.sqlConnection = sqlConnection; stmt.text = sql; stmt.addEventListener(SQLEvent.RESULT,checkRecord); stmt.addEventListener(SQLErrorEvent.ERROR,checkError); stmt.execute(); } } public function checkRecord(event:Event):void{ var category:Object=xmlcollection.getItemAt(index); var path:String=""; var result:SQLResult = stmt.getResult(); if(result.data==null){ var sql:String= "INSERT INTO CATEGORY (cat_name, created_user,created_dt,updated_user,updated_dt,image_jpg,image_pdf) "; sql += "VALUES ('"+category['catname']+"',"; sql +="'admin','"+category['cdate']+"','admin','"+category['udate']+"'"+category['pictimage']+"','"+category['pdfimage']+"' )"; stmt = new SQLStatement(); stmt.sqlConnection = sqlConnection; stmt.text = sql; stmt.addEventListener(SQLEvent.RESULT,insertRecord); stmt.addEventListener(SQLErrorEvent.ERROR,insertError); stmt.execute(); }else{ sql=""; sql="update CATEGORY set created_dt='"+category['cdate']+"', updated_dt='"+ category['udate']+"',image_jpg='"+category['pictimage']+"', image_pdf='"+category['pdfimage']+"' where delflag=0 and cat_name='"+category['catname']+"'"; stmt = new SQLStatement(); stmt.sqlConnection = sqlConnection; stmt.text = sql; stmt.addEventListener(SQLEvent.RESULT,updateResult); stmt.addEventListener(SQLErrorEvent.ERROR,updateError); stmt.execute(); } userRequest.send(null); var ludt_dt:Object=xmlcollection.getItemAt((xmlcollection.length-1)); timestamp=""; timestamp=ludt_dt['udate']; sql=""; sql="update update_mas set lupdated_dt='"+timestamp+"' where delflag=0 "; stmt = new SQLStatement(); stmt.sqlConnection = sqlConnection; stmt.text = sql; stmt.addEventListener(SQLEvent.RESULT,updateResult); stmt.addEventListener(SQLErrorEvent.ERROR,updateError); stmt.execute(); var temp:int=0; for(var x:int=0;x<=xmlcollection.length-1;){ var urlstring:String="http://sidssoldc:81/lessons/ravi/"; var url:Object=xmlcollection.getItemAt(x); urlstring+=url['pdfimage']; path=url['pdfimage']; while((path.indexOf('/',0)!=-1)){ path=path.slice(path.indexOf('/',0)+1,path.length); } urlReq=new URLRequest(urlstring); var filename:Object=xmlcollection.getItemAt(x); var loader:URLLoader=new URLLoader(); loader.dataFormat="binary"; selectstream=2; loader.load(urlReq); loader.addEventListener(Event.COMPLETE,function(event:Event){ var loader:URLLoader=(URLLoader)(event.target); loader.dataFormat="binary"; var ofstream2:FileStream= new FileStream(); var ofstream1:FileStream= new FileStream(); var ofstream3:FileStream= new FileStream(); if(selectstream==1){ var ofile1:File = File.applicationStorageDirectory.resolvePath('images/pdf/'+path); ofstream1.openAsync(ofile1, FileMode.WRITE); ofstream1.writeBytes(loader.data, 0, loader.bytesTotal); selectstream++; }else if(selectstream==2){ ofstream1.close(); var ofile2:File = File.applicationStorageDirectory.resolvePath('images/pdf/'+path); ofstream2.openAsync(ofile2, FileMode.WRITE); ofstream2.writeBytes(loader.data, 0, loader.bytesTotal); selectstream++; }else if(selectstream==3){ ofstream2.close(); var ofile3:File = File.applicationStorageDirectory.resolvePath('images/pdf/'+path); ofstream3.openAsync(ofile3, FileMode.WRITE); ofstream3.writeBytes(loader.data, 0, loader.bytesTotal); } if(selectstream==3){ ofstream3.close(); } }); x++; temp=loader.bytesTotal; checkStream.close(); } /*urlStream=new URLStream(); urlStream.addEventListener(Event.COMPLETE, function(event:Event){ urlStream.readBytes(fileData, 0, urlStream.bytesAvailable); for(var x:int=0;x<nupdates;x++){ var filename:Object=xmlcollection.getItemAt(x); newfile=filename['pdfimage']; var obj:Object=new Object; startdownload=true; var file:File = File.applicationStorageDirectory.resolvePath(newfile); var fileStream:FileStream = new FileStream(); fileStream.openAsync(file, FileMode.WRITE); fileStream.writeBytes(fileData, 0, fileData.length); fileStream.addEventListener(Event.COMPLETE,progressHandler,true,10,true); for(var x:int=0;x<fileData.length;x++){ startdownload=false; fileStream.close(); } }); urlStream.load(urlReq); x++;*/ } public function insertRecord(event:Event):void{} public function insertError(event:Event):void{} public function updateResult(event:Event):void{} public function updateError(event:Event):void{ Alert.show("update failed"); } public function checkError(event:Event):void{ Alert.show("error"); } public function showError(event:FaultEvent):void{ Alert.show(""+event.fault); } public function itemClick(event:ListEvent):void{} ]]> </mx:Script> <mx:DataGrid id="dgUserRequest" sortableColumns="false" x="99" y="115" width="364" textAlign="left" itemClick="itemClick(event);" rowHeight="30" doubleClickEnabled="false" height="297" themeColor="#ACF4F8" visible="true" editable="false" dataProvider="{catxmlcollection}" color="#000C0E" fontSize="11" > <mx:columns> <mx:DataGridColumn id="ID" headerText="Id" visible="false" dataField="catid" /> <mx:DataGridColumn id="snumber" width="70" headerText="SerialNo" dataField="sno" visible="true" /> <mx:DataGridColumn id="CATEGORY3" width="250" headerText="CATEGORY" dataField="catname" visible="true" /> </mx:columns> </mx:DataGrid> <mx:XMLListCollection id="catxmlcollection" source="{userRequest.lastResult.categories.category}"/> <mx:HTTPService id="userRequest" url="http://192.168.10:81/lessons/ravi/cat.php" fault="showError(event);" useProxy="false" method="GET" resultFormat="e4x" /> <mx:HTTPService id="updateRequest" result="displayPOPUP(event);" fault="showError(event);" method="GET" > </mx:HTTPService> <mx:XMLListCollection id="xmlcollection" source="{downloadRequest.lastResult.Categories.Category}" /> <mx:HTTPService id="downloadRequest" result="displayResult(event);" fault="showError(event);" useProxy="false" method="GET" resultFormat="e4x" ></mx:HTTPService> <mx:HTTPService id="categoryRequest"></mx:HTTPService> <mx:Label x="216" y="53" text="Category Master" fontWeight="bold" fontSize="12" width="151"/> </mx:WindowedApplication> </code></pre>
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<flex><download>
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Multiple downloads in flex
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1. USRAVI SHANKAR.M
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 POMultiple downloads in flex
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