我有一个客户端和一个服务器,一个经典的例子,试图以非常简单的方式模拟http协议。首先,客户端在服务器打印数据时发送数据,然后发送数据。在下面的代码中,无论是服务器还是客户端块,原因不明。 客户端向服务器发送数据,服务器接收数据并打印它。但是在打印数据之后它会阻塞。如果关闭客户端的输出流(out.close()),则客户端应该获取服务器的数据,但是会抛出IOException异常,并显示消息:Socket关闭。简单的服务器/客户端套接字:阻塞 - Java
我的问题是为什么它阻止?我是否必须用EOS触发输出?
CLIENT
import java.nio.*;
import java.nio.channels.*;
import java.net.*;
import java.util.*;
import java.io.IOException;
import java.io.*;
public class block_client_webclient
{
public static void main(String [] args)
{
try{
Socket s = new Socket("localhost", 8080);
OutputStreamWriter out = new OutputStreamWriter(s.getOutputStream());
InputStreamReader in = new InputStreamReader(s.getInputStream());
//WRITE
out.write("GET/HTTP/1.1\r\nUser-agent: Agent 2.0 Browser\r\nAccept: */*\r\nAccept-Language: en-US,en;q=0.5\r\nConnection: keep-alive\r\n\r\n");
out.flush();
out.close();
if (s.isConnected()==true && s.isClosed()==false) System.out.println("OPEN");
else System.out.println("CLOSED");
char[] bin = new char[400];
int r=0;
//READ
while((r=in.read(bin))!=-1) { System.out.println("Input data: "+r+" bytes"); System.out.print(bin); bin= new char[400]; };
System.out.println(r);
s.close();
}
catch (IOException ex) {System.out.println(ex.getMessage());}
}
}
服务器
import java.nio.*;
import java.nio.channels.*;
import java.net.*;
import java.util.*;
import java.io.IOException;
import java.io.*;
public class block_server_webserver
{
public static void main(String [] args)
{
while(true)
{
try{
ServerSocket server = new ServerSocket(8080);
Socket connection = server.accept();
try{
OutputStreamWriter out = new OutputStreamWriter(connection.getOutputStream());
InputStreamReader in = new InputStreamReader(connection.getInputStream());
char[] bin = new char[400];
int r=0;
int readsofar=0;
//READ
while((r=in.read(bin))!=-1) { System.out.print(bin); bin= new char[400]; };
System.out.println("END");
//WRITE
out.write("Server: BlockServer 1.0\r\nHost: 192.168.1.1\r\n\r\n");
out.flush();
System.out.println("Just written data to "+connection.getRemoteSocketAddress());
connection.close();
} catch (IOException ex) { connection.close();}
}catch (IOException ex) {}
}
}
}