java SSL 连接超时和读取超时

SSL Connection timeout and read timeouts

提问by JSU

I have a doubt on where to set the socket timeout within my code. What I am trying to achieve is that when the socket is created the timeout should be 10seconds. So I am setting it before the handshake. now the error that I see in the logs are of two kinds. 1) Connection Timeout Error and 2) Read timeout Error. So I was wondering if anyone could explain me more about where to set the timeouts. I have the following code:

我对在我的代码中设置套接字超时的位置有疑问。我想要实现的是，当创建套接字时，超时应该是 10 秒。所以我在握手之前设置它。现在我在日志中看到的错误有两种。1) 连接超时错误和 2) 读取超时错误。所以我想知道是否有人可以向我解释更多关于在哪里设置超时的信息。我有以下代码：

try{
  SSLSocketFactory factory=(SSLSocketFactory)SSLSocketFactory.getDefault();
  socket = (SSLSocket)factory.createSocket(host,port);
  socket.setSoTimeout(10000);
  socket.startHandshake();

  OutputStream socketOut =( socket.getOutputStream() );

  String command = method+" "+path+" HTTP/1.0\n";
  //command+="Host: "+host+"\nConnection: close\n";

  if (data!=null) {
command+="Content-Length: " + data.length +"\n\n";
    sendBytes.write(command.getBytes(),0,command.length());
    sendBytes.write(data,0,data.length);
  } else {
    // if data == null then we are most likely doing a GET request
    sendBytes.write(command.getBytes(),0,command.length());
  }

  sendBytes.write("\n".getBytes(),0,"\n".length());

  temp = sendBytes.toByteArray();
  socketOut.write(temp,0,temp.length);
  socketOut.flush();

  /* read response */
  BufferedInputStream socketIn = 
    new BufferedInputStream( socket.getInputStream() );

  byte[] inputData = new byte[READSIZE];
  while ((bytesRead=socketIn.read(inputData,0,READSIZE)) > -1) {
      receiveBytes.write(inputData,0,bytesRead);
  }
  result=receiveBytes.toByteArray();

  //receiveBytes.close();
  //sendBytes.close();
  //socket.close();

} catch (Exception e) {
  throw e;
}finally {
try { receiveBytes.close(); sendBytes.close(); socket.close(); } catch (Exception ee) {}
}     
return result;
} // end submit

} // end class

Please let me know how can i get the timeout to atleast work . In the logs the errors are occuring at 18secs ( which should not be the case) instead of 10secs.

请让我知道如何让超时至少工作。在日志中，错误发生在 18 秒（不应该是这种情况）而不是 10 秒。

Thanks

谢谢

回答by emboss

The problem is most likely that the timeout already occurs upon connection when creating your socket. Try instantiating an unconnected socket first with the no arguments factory method and then use Socket#connectwith the timeoutoption in addition to Socket#setSoTimeout. The latter only kicks in for these operations

问题很可能是在创建套接字时连接时已经发生超时。首先尝试使用无参数工厂方法实例化一个未连接的套接字，然后将Socket#connect与timeout选项一起使用Socket#setSoTimeout。后者仅用于这些操作

ServerSocket.accept()

SocketInputStream.read()

DatagramSocket.receive()

ServerSocket.accept()

SocketInputStream.read()

DatagramSocket.receive()

but does not handle timeouts during connection attempts.

但在连接尝试期间不处理超时。

See also the technical article for networking timeoutsfor more details.

有关更多详细信息，另请参阅有关网络超时的技术文章。