java.net.SocketException:通过对等方重置连接:套接字写入错误提供文件时

Question

我正在尝试使用套接字实现HTTP服务器.如果客户端(例如浏览器)请求目录,则服务器显示可用文件列表.当客户端请求文件时出现问题.我收到以下错误:

java.net.SocketException: Connection reset by peer: socket write error
at java.net.SocketOutputStream.socketWrite0(Native Method)
at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:113)
at java.net.SocketOutputStream.write(SocketOutputStream.java:159)
at cf.charly1811.java.web.RequestHandler.writeFile(RequestHandler.java:152)
at cf.charly1811.java.web.RequestHandler.processRequest(RequestHandler.java:139)
at cf.charly1811.java.web.RequestHandler.handleRequest(RequestHandler.java:110)
at cf.charly1811.java.web.RequestHandler.run(RequestHandler.java:86)
at java.lang.Thread.run(Thread.java:745)

堆栈跟踪显示问题来自writeFile()方法:

private void writeFile(File request) throws IOException 
{
    InputStream byteReader = new BufferedInputStream(new FileInputStream(request));
    byte[] buffer = new byte[1024];
    int bytesRead;
    while ((bytesRead = byteReader.read(buffer)) != -1) 
    {
        outputStream.write(buffer, 0, bytesRead);
    }
    byteReader.close();
}

但我无法弄清楚出了什么问题.你能帮助我吗？

编辑

谢谢大家的回答.在我读完你的答案之后,我明白问题是Socket发生错误时.这是我的错误代码:

// Method to process a single request
handleRequest() throw IOException
{
    // process here
    // if the client request a file
    writeFile();
    // close socket when the request is processed
}

// The method is called
public run()
{
    try{
        // If an error occurs the try/catch won't be called because it is implemented outside the loop. So when an IOException occurs, the loop just stop and exit the program
        while(true)
        {
            handleRequest();
        }
    }
    catch(IOException e) {
        // Handle exception here
    }
}

我的新代码看起来像这样:

// Method to process a single request
handleRequest()
{
   try {
        // process here
        // if the client request a file
        writeFile();
        // close socket when the request is processed
    }
    // If this exception occurs the catch() method will be called
    catch(IOException e)
    {
        // handle exception here
    }
}

// The method is called
public run()
{
    while(true)
        {
            handleRequest();
        }
    }
}

Answer 1

TCP套接字可能"关闭"并且您的代码尚未得到通知.

这是生命周期的动画.http://tcp.cs.st-andrews.ac.uk/index.shtml?page=connection_lifecycle

基本上,连接由客户端关闭.你已经拥有throws IOException并SocketException扩展IOException.这工作得很好.你只需要正确处理,IOException因为它是api的正常部分.

编辑:RST当在不存在或已关闭的套接字上接收到数据包时,会发生数据包.您的申请没有区别.根据实施情况,reset州可能坚持并且closed永远不会正式发生.