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 Compiler的Flash Player版本設為10.0.0。
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:FormItem
/mx:Form
/mx:VBox
/mx:Box
/mx:Panel
/mx:Application
[範例下載]