1
我正在一个简单的服务器上工作,只是为了了解它是如何工作的。我有一个Java服务器和Java客户端工作,但试图让一个JavaScript客户端连接到同一个Java服务器正在让我疯狂!Javascript客户端无法连接到java服务器
Java服务器:
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.ServerSocket;
import java.net.Socket;
public class DateServer {
public static void main(String[] args) throws IOException {
ServerSocket listener = new ServerSocket(9091);
System.out.println("Starting");
try {
while (true) {
System.out.println("While");
Socket socket = listener.accept();
System.out.println("Accepted");
BufferedReader input = new BufferedReader(new InputStreamReader(socket.getInputStream()));
String msg = input.readLine();
System.out.println("Message from client: " + msg);
try {
PrintWriter out =
new PrintWriter(socket.getOutputStream(), true);
System.out.println("Sending message...");
out.println("Hi");
} finally {
System.out.println("Closing socket");
socket.close();
}
}
}
finally {
listener.close();
}
}
}
Java客户端:(工作)
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.PrintWriter;
import java.net.Socket;
import java.net.UnknownHostException;
import javax.swing.JOptionPane;
public class DateClient {
public static void main(String[] args) throws IOException {
Socket s = new Socket("localhost", 9091);
try {
PrintWriter out =
new PrintWriter(s.getOutputStream(), true);
System.out.println("Sending message...");
out.println("I'm the client");
} finally {
//System.out.println("Closing socket");
//s.close();
}
BufferedReader input = new BufferedReader(new InputStreamReader(s.getInputStream()));
String msg = input.readLine();
System.out.println(msg);
JOptionPane.showMessageDialog(null, msg);
s.close();
System.exit(0);
}
}
JavaScript客户端:
<!DOCTYPE html>
<html>
<head>
<title>Echo Test</title>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width">
</head>
<body>
<div id="messages"></div>
<script type="text/javascript">
var connection = new WebSocket('ws://localhost:9091/');
var messages = document.getElementById("messages");
// When the connection is open, send some data to the server
connection.onopen = function (e) {
writeResponse('sent');
connection.send('Ping');
}
// Log errors
connection.onerror = function (error) {
writeResponse('Error: ' + error);
}
connection.onclose = function(e){
writeResponse("Disconnected: " + e.data);
}
// Log messages from the server
connection.onmessage = function (e) {
writeResponse('Server: ' + e.data);
}
function writeResponse(text){
messages.innerHTML += "<br/>" + text;
}
</script>
</body>
</html>
当我运行我得到服务器的Java客户端:
Starting
While
Accepted
Message from client: I'm the client
Sending message...
Closing socket
While
从客户端
输出:
Sending message...
Hi
使作品。当我运行JavaScript客户端,服务器的输出是:
Starting
While
Accepted
Message from client: GET/HTTP/1.1
Sending message...
Closing socket
While
和JavaScript页面上的输出:
Error: [object Event]
Disconnected: undefined
此外,火狐控制台说:“火狐无法建立与连接服务器在ws:// localhost:9091 /“。我错过了什么?谢谢!
谢谢!该页面指向我写入HTTP响应的正确方向并发送正确的sec-websocket-accept密钥,并且客户端现在连接到服务器:) – Arlo
@Arlo - 仅供参考,现在已有类实现webSocket服务器Java的。您可能只想抓住其中一个,而不是自己重新实施整个协议。 – jfriend00