[英]How to continue read InputStream in loop used Socket-connection?
在服务器站点中,我使用循环继续读取从客户端发送的数据,但是当我从客户端通过发送数据时,服务器站点抛出异常。
我调试了服务器站点可以从客户端读取数据的代码,但是当它完成从客户端读取数据时,循环无法停止,我猜这是由异常引起的!
当MAX_INPUT小于发送到服务器的数据时,如何解决此问题,服务器可以继续正确读取它!
如答案所说,我在客户端站点中的finally块中添加了socket.close()
,它解决了Connection重置问题。
同时,我将服务器站点设置为MAX_INPUT = 8
,该服务器可以继续读取输入的字节并将其发送回客户端。 但是结果是客户端无法接收完整的数据:
Server's response is: This is
Server's response is: This is
Server's response is: This is Seq.0 request send to server!
Server's response is: This is Seq.3 request send to server!
Server's response is: This is Seq.4 request send to server!
有时服务器站点抛出异常,例如:
java.net.SocketException: Software caused connection abort: recv failed
at java.net.SocketInputStream.socketRead0(Native Method)
at java.net.SocketInputStream.read(Unknown Source)
at java.net.SocketInputStream.read(Unknown Source)
at java.net.SocketInputStream.read(Unknown Source)
at com.simple.server.Server$Handler.run(Server.java:44)
at java.lang.Thread.run(Unknown Source)
服务器站点代码:
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.ServerSocket;
import java.net.Socket;
public class Server implements Runnable {
public final static int port = 8080;
public final static String host = "127.0.0.1";
public final static int MAX_INPUT = 1024;
public void run() {
try {
ServerSocket serverSocket = new ServerSocket(port);
System.out.println("Server begin to listen to port to accept!\n");
while (!Thread.interrupted()) {
Socket socket = serverSocket.accept();
new Thread(new Handler(socket)).start();
}
} catch (IOException e) {
e.printStackTrace();
}
}
private static class Handler implements Runnable {
private Socket _socket;
Handler(Socket socket) {
_socket = socket;
}
public void run() {
try {
InputStream in = _socket.getInputStream();
OutputStream out = _socket.getOutputStream();
int read;
byte[] buf = new byte[MAX_INPUT];
// I use a loop to continue to read
// data from client
while ((read = in.read(buf)) != -1)
out.write(buf, 0, read);
} catch (IOException e) {
e.printStackTrace();
} finally {
try {
_socket.close();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
}
public static void main(String args[]) {
new Thread(new Server()).start();
}
}
客户端站点代码:
public class Client implements Runnable {
public final static String host = "127.0.0.1";
public final static int port = 8080;
public final static int MAX_INPUT = 1024;
private int seq;
Client(int seq) {
this.seq = seq;
}
public void run() {
try {
Socket client = new Socket(host, port);
OutputStreamWriter writer = new OutputStreamWriter(client.getOutputStream());
InputStreamReader reader = new InputStreamReader(client.getInputStream());
writer.write("This is Seq." + seq + " request send to server!");
writer.flush();
char[] buf = new char[MAX_INPUT];
int len = reader.read(buf);
String response = new String(buf, 0, len);
System.out.println("Server's response is: " + response);
} catch (IOException e) {
e.printStackTrace();
}
}
public static void main(String args[]) {
Thread threads[] = {
new Thread(new Client(0)),
new Thread(new Client(1)),
new Thread(new Client(2)),
new Thread(new Client(3)),
new Thread(new Client(4))
};
for(Thread thread : threads)
thread.start();
}
}
抛出异常:
java.net.SocketException: Connection reset
at java.net.SocketInputStream.read(Unknown Source)
at java.net.SocketInputStream.read(Unknown Source)
at java.net.SocketInputStream.read(Unknown Source)
at com.simple.server.Server$Handler.run(Server.java:44)
at java.lang.Thread.run(Unknown Source)
您的服务器正在读取输入,直到流结束,并随其回显。 您的客户端正在发送一个请求并读取一个响应,并且从未关闭套接字。 因此,当客户端进程退出时,服务器遇到的是连接重置,而不是服务器遇到流的结尾。
解决方案:关闭客户端中的套接字。
声明:本站的技术帖子网页,遵循CC BY-SA 4.0协议,如果您需要转载,请注明本站网址或者原文地址。任何问题请咨询:yoyou2525@163.com.