如何修复断开的管道socket异常（Java）？连接在哪里被关闭？

Question

我正在为一个学校项目开发一个多线程web服务器。我应该能够进入浏览器上的本地主机，请求3个不同的文件（.htm、.jpeg、.pdf）。然而，当我这样做了一段时间。htm文件，其中包含图片（2个请求）。htm文件出现在浏览器中，但我尝试对图片进行的每次写入都会出现许多断管插座异常（分配要求一次写入1024字节）。我的实现方式显然有问题，但当我尝试为第二个文件编写时，我不知道连接在哪里被关闭

我尝试了几种不同的方法来解决这个问题，包括尝试读取socket输入流时的循环，但我认为这违背了多线程服务器的目的

服务器：

    while(true){
        try {
            sock = servSock.accept(); // Handles the connection
            // Connection received log
            System.out.println("Connection received: " + new Date().toString() + " at " + sock.getInetAddress() + sock.getPort());
            HTTP pro = new HTTP(sock); // Client handler
            pro.run();

            ServerThread serverThread = new ServerThread(pro); 
            // Starts ServerThread
            serverThread.start();
        } catch (Exception e){
            System.out.println(e);
        }
    }

HTTP:

    public void run(){
        // Try to open reader
        try{
            readSock = new BufferedReader(new InputStreamReader(sock.getInputStream()));
        } catch (Exception e){
            System.out.println(e);
        }

        // Open output stream
        try{
            this.out = new DataOutputStream(sock.getOutputStream()); 
            this.printOut = new PrintWriter(sock.getOutputStream()); 
        } catch (Exception e){
            System.out.println(e);
        }

        // Try to read incoming line
        try {
            this.reqMes = readSock.readLine();
        } catch (IOException e) {
            e.printStackTrace();
        }

        StringTokenizer st = new StringTokenizer(reqMes);

        // Parse the request message
        int count = 0;
        while(st.hasMoreTokens()){
            String str = st.nextToken();
            if (count == 1){
                this.fileName = "." + str;
            }
            count += 1;
        }
        System.out.println("File name received.");

        File file = null;
        try {
            file = new File(this.fileName);
            this.f = new FileInputStream(file); // File input stream
            this.fileExists = true;
            System.out.println("File " + this.fileName +  " exists.");
        } catch (FileNotFoundException e) {
            System.out.println(e);
            this.fileExists = false;
            System.out.println("File does not exist.");
        }

        byte[] buffer = new byte[1024];
        // Write status line
        if (this.fileExists) {
            System.out.println("Trying to write data");
            try{
                this.out.writeBytes("HTTP/1.0 " + "200 OK " + this.CRLF);
                this.out.flush();
                this.printOut.println("HTTP/1.0 " + "200 OK " + this.CRLF);
                // Write Header
                this.out.writeBytes("Content-type: " + getMime(this.fileName) + this.CRLF);
                this.printOut.println("Content-type: " + getMime(this.fileName) + this.CRLF);
                this.out.flush();

                // Read file data
                byte[] fileData = new byte[1024];

                while (this.f.read(fileData) != -1) {
                    // Write File data
                    try{
                        this.out.write(fileData,0,1024);
                        this.out.flush(); // Flush output stream
                    } catch (IOException e) {
                        System.out.println(e);
                    }
                }
                System.out.println("Flushed");
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

首先。htm文件在浏览器中，文件和html看起来很好。但它似乎又提出了第二个请求。html文件中的jpeg文件，浏览器无法加载java。网SocketException：每次写入数据时管道破裂（写入失败）

this.out.write(fileData,0,1024);

谢谢，非常感谢您的帮助