Question

我有Java Socket发送.TXT文件（10 MB）。但AS3仅获得63 Kb。我不明白字节的丢失......

（服务器）Java Source Socket。将文件发送到客户端AS3

    public void sendFile(String fileName) {
        File myFile = new File(fileName);
        byte[] mybytearray = new byte[(int) myFile.length()];


        FileInputStream fis = new FileInputStream(myFile);
        BufferedInputStream bis = new BufferedInputStream(fis);


        DataInputStream dis = new DataInputStream(bis);
        dis.readFully(mybytearray, 0, mybytearray.length);


        OutputStream os = clientSocket.getOutputStream();


        byte[] fileSize = intToByte(mybytearray.length);
        byte[] clientData = new byte[(int) myFile.length() + mybytearray.length];
        System.arraycopy(fileSize, 0, clientData, 0, fileSize.length);  
        System.arraycopy(mybytearray, 0, clientData, 4, mybytearray.length);  


        DataOutputStream dos = new DataOutputStream(os);
        dos.write(clientData, 0, clientData.length);
        dos.flush(); }

来自Java的客户端/接收字节AS3

private function onResponse(e:ProgressEvent):void {
var file:File;
var fs:FileStream;
var fileData:ByteArray = new ByteArray();
file = File.documentsDirectory.resolvePath("tmpReceive.txt");
fs = new FileStream();
fs.addEventListener(Event.CLOSE,onCloseFileReceive);


if(_socket.bytesAvailable > 0) {
  while(_socket.bytesAvailable) {

 _socket.readBytes(fileData,0,0);
  } }

  fs.open(file, FileMode.WRITE);


   fs.writeBytes(fileData);
   fs.close();  }

Answer 1

它说＆＃34;套接字以异步方式接收数据＆＃34; in the flash.net.Socket manual，这意味着您必须侦听该套接字上的事件，并且当有事件时，您从套接字读取字节，并且一旦收到＆＃34;关闭＆＃34;事件或通过任何其他方式发现文件的结尾，只有这样您才能将文件刷新到磁盘。我看到你首先发送一个包含文件大小的4字节整数值，所以使用这个值来确定文件是否通过套接字完全读取。

var fileSize:int=0;
var fileData:ByteArray=new ByteArray();
_socket.addEventListener(flash.events.ProgressEvent.SOCKET_DATA,readFromSocket);
function readFromSocket(e:ProgressEvent):void {
    if (_socket.bytesAvailable==0) return; // no data
    if (fileSize==0) {
        fileSize=_socket.readInt(); 
        // get file size if we've just initialized file transfer
        fileData.length=0;
        fileData.position=0; // clear the array to not mess with previous file, if any
    } else if (fileSize==fileData.length) return; // still flushing file to disk
    if (_socket.bytesAvailable>0) {
        _socket.readBytes(fileData,0,Math.min(fileSize-fileData.length,_socket.bytesAvailable)); 
        // get all available bytes up to received file's length
        // there might not be enough, so we use minimum of what's unread and what's present
        if (fileData.length>=fileSize) {
            trace("File received: size given",fileSize","size received", fileData.length); 
            // these should be equal, if not, you have more to dig
            // now dump the file, you have the code, insert it here
            // and don't forget to set fileSize to 0 once you have received 
            // the "end of writing file to disk" event, so that you can
            // receive another file via same socket
            // once you'll perfect this, consider sending an UTF-string
            // with file name prior to sending file.
        }
    }
}

你的63kb值似乎比套接字服务的字节少了64kb，这会为应用程序生成一个ProgressEvent.SOCKET_DATA的事件，而你假设所有10MB的数据都被一次性放入套接字。 / p>

Int Size Bytes Socket AS3

1 个答案: