Flex

Flex教學-WEB瀏覽本機檔案經由Ftp上傳檔案

梅干 2009/08/17

梅問題-flex教學-web瀏覽本機檔案再經ftp上傳檔案

  WEB中要上傳檔案都是得透過http的方式,將檔案上傳到遠端去,當今天檔案太大時,則會出現時間逾時的問題, 因此梅干在想若可以從web中,將檔案透過ftp的方式來上傳,不就可解決此問題,同時ftp又有續傳的功能,於是上谷哥查了一下,Flash player10已支援ftp上傳的功能,因此梅干就用Flex來進行開發, 之前可登入也可傳,但卻只行傳送文字檔,搞了老半天才知道,原來是上傳時還得告知主機,目前所上傳的編碼類型為何,目前終於成功的可正常的上下傳任何檔案了~在這過程中也要特別感謝鄧教授山羊這幾位好朋友的大力相助。


Step1
建立一個新的專案,再將Flex CompilerFlash Player版本設為10.0.0
梅問題-flex教學-web瀏覽本機檔案再經ftp上傳檔案
Step2
FlexFtpUload原始碼如下:

<?xml version=“1.0” encoding=“utf-8”?>

mx:Script

import mx.utils.;
import mx.controls.Alert;
import flash.net.FileReference;
import flash.net.
;
import flash.utils.*;

//檔案大小與檔案傳輸類型
private var fileSize:uint;
private var fileContents:ByteArray;

//連線用Socket
private var ftpSocket:Socket;
private var ftpResponce:String;

//上傳檔案用Socket
private var upLoadSocket:Socket;
private var upLoadResponce:String;

//取得使用者的IP與Port
private var ClientIP:String;
private var ClientPort:int;

//連線到FTP資訊
private var server:String=””;//FTP 主機位置ex.ftp.abc.com
private var user:String=””;//FTP 帳號
private var pass:String=””;//FTP 密碼
private var dir:String=””;//FTP 上傳資料夾

//Ftp連線
private function connect():void{
this.connbtn.enabled=false;

ftpSocket = new Socket(server,21);
sendCommand(“USER “+this.user);
sendCommand(“PASS “+this.pass);
sendCommand(“CWD “+dir);

ftpSocket.addEventListener(ProgressEvent.SOCKET_DATA, SocketData);
ftpSocket.addEventListener(IOErrorEvent.IO_ERROR, IOError);
ftpSocket.addEventListener(SecurityErrorEvent.SECURITY_ERROR, SecError);

ftpSocket.addEventListener(Event.CONNECT, SocketConn);
ftpSocket.addEventListener(Event.CLOSE, SocketClose);
ftpSocket.addEventListener(Event.ACTIVATE, SocketAtivate);
}

private function SocketData(e:ProgressEvent):void{
ftpResponce = ftpSocket.readUTFBytes(ftpSocket.bytesAvailable)
var serverResponse:Number = Number(ftpResponce.substr(0, 3));

if(ftpResponce.indexOf('227')>-1){
//取得使用者的ip位置
var temp:Object = ftpResponce.substring(ftpResponce.indexOf(“(“)+1 ,ftpResponce.indexOf(“)”));
var upLoadSocket_temp:Object = temp.split(“,”);
ClientIP = upLoadSocket_temp.slice(0,4).join(“.”);
ClientPort = parseInt(upLoadSocket_temp[4])*256+
int(upLoadSocket_temp[5]);

//建立一個上傳的PORT
upLoadSocket = new Socket(ClientIP,ClientPort);
upLoadSocket.addEventListener(ProgressEvent.SOCKET_DATA, receiveData);
}

switch(String(serverResponse)){
case “220”: //FTP連線就續
break;

case “331”://帳號ok,密碼錯誤
break;

case “230”://登入成功
//指定下載文件的類型,I是二進位文件,A是字元文件
sendCommand(“TYPE A”);//設定TYPE為ASCII
sendCommand(“TYPE I”);//設定上傳的編碼為8-bit binary
sendCommand(“PASV”);//passive模式
break;

case “250” ://資料夾切換成功
break;

case “227” : //Entering Passive Mode (h1,h2,h3,h4,p1,p2).
break;
default:
}
traceData(ftpResponce);
}

private function IOError(e:IOErrorEvent):void{
traceData(“—>Error:”+e.text);
}

private function SecError(e:SecurityErrorEvent):void{
traceData(“–>SecurityError:”+e.text);
}

private function SocketConn(evt:Event):void {
traceData(“–>OnSocketConnect:”+evt.target.toString());
}

private function SocketAtivate(evt:Event):void {
traceData(“–>onSocketAtivate”);
sendCommand(“PWD”);
ftpSocket.flush();
}

private function SocketClose(evt:Event):void {
traceData(“–>onSocketClose”);
sendCommand(“REST 0”);
sendCommand(“PWD”);
ftpSocket.flush();
}

//ProgressEvent.SOCKET_DATA
private function receiveData(e:ProgressEvent):void{
upLoadResponce = upLoadSocket.readUTFBytes(upLoadSocket.bytesAvailable);
traceData(“upLoadSocket_response—>”+upLoadResponce);
}

//瀏覽檔案
private function selectEvent(event:Event):void{
upLoadbtn.enabled = true;
this.filename.text = fileRef.name;
fileRef.load();
}

//檔案上傳
private function uploadFile():void {
createRemoteFile(fileRef.name);//下上傳指令
sendData();//送出檔案
}

private function createRemoteFile(fileName:String):void{
if(fileName!=null && fileName !=””){
sendCommand(“STOR “+fileName);//上傳指令
ftpSocket.flush();
}
}

//檔案轉二進位傳送
private function sendData():void{
fileContents=fileRef.data as ByteArray;
fileSize=fileRef.size;
upLoadSocket.writeBytes(fileContents,0,fileSize);
upLoadSocket.flush();
}

//處理Ftp指令
private function sendCommand(arg:String):void {
arg +=”\n”;
ftpSocket.writeUTFBytes(arg);
ftpSocket.flush();
}

//顯示資訊
private function traceData(event:Object):void {
var tmp:String = “================================\n”;
infotxt.text +=event.toString()+ “\n” ;
infotxt.verticalScrollPosition += 20;
}

/mx:Script



mx:VBox
mx:Form


/mx:FormItem





/mx:FormItem




/mx:FormItem
/mx:Form
/mx:VBox
/mx:Box
/mx:Panel
/mx:Application


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