[CODE lang="html" title="HTML-WebSocket-Client"]<!DOCTYPE HTML>
<html>
<head>
<script type = "text/javascript">
function WebSocketTest() {
if ("WebSocket" in window) {
alert("WebSocket is supported by your Browser!");
// Let us open a web socket
var ws = new WebSocket("ws://localhost:11111");
ws.onopen = function() {
// Web Socket is connected, send data using send()
ws.send("Message to send");
alert("Message is sent...");
};
ws.onmessage = function (evt) {
var received_msg = evt.data;
alert("Message is received...");
};
ws.onclose = function() {
// websocket is closed.
alert("Connection is closed...");
};
} else {
// The browser doesn't support WebSocket
alert("WebSocket NOT supported by your Browser!");
}
}
</script>
</head>
<body>
<div id = "sse">
<a href = "javascript:WebSocketTest()">Run WebSocket</a>
</div>
</body>
</html>[/CODE]
[CODE lang="java" title="Server"]import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.i
utputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Base64;
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Test {
public static void main(String[] args) throws IOException, NoSuchAlgorithmException {
ServerSocket server = new ServerSocket(11111);
try {
System.out.println("Server has started on 127.0.0.1:11111.\r\nWaiting for a connection...");
Socket client = server.accept();
System.out.println("A client connected.");
InputStream in = client.getInputStream();
OutputStream out = client.getOutputStream();
Scanner s = new Scanner(in, "UTF-8");
try {
String data = s.useDelimiter("\\r\\n\\r\\n").next();
Matcher get = Pattern.compile("^GET").matcher(data);
if (get.find()) {
Matcher match = Pattern.compile("Sec-WebSocket-Key: (.*)").matcher(data);
match.find();
byte[] response = ("HTTP/1.1 101 Switching Protocols\r\n"
+ "Connection: Upgrade\r\n"
+ "Upgrade: websocket\r\n"
+ "Sec-WebSocket-Accept: "
+ Base64.getEncoder().encodeToString(MessageDigest.getInstance("SHA-1").digest((match.group(1) + "258EAFA5-E914-47DA-95CA-C5AB0DC85B11").getBytes("UTF-8")))
+ "\r\n\r\n").getBytes("UTF-8");
out.write(response, 0, response.length);
out.flush();
while(true)
if(s.hasNextLine())
System.out.print("Input: " + s.nextLine());
}
} finally {
s.close();
}
} finally {
server.close();
}
}
}[/CODE]
Nachdem der Client (JavaScript-WebSocket) sich mit dem Server erfolgreich verbunden hat, sollte eigentlich die Methode einen String verschicken. Bei meinem Server kommt aber nichts an. Kann mir vielleicht wer helfen, Danke schomal im Vorraus.
<html>
<head>
<script type = "text/javascript">
function WebSocketTest() {
if ("WebSocket" in window) {
alert("WebSocket is supported by your Browser!");
// Let us open a web socket
var ws = new WebSocket("ws://localhost:11111");
ws.onopen = function() {
// Web Socket is connected, send data using send()
ws.send("Message to send");
alert("Message is sent...");
};
ws.onmessage = function (evt) {
var received_msg = evt.data;
alert("Message is received...");
};
ws.onclose = function() {
// websocket is closed.
alert("Connection is closed...");
};
} else {
// The browser doesn't support WebSocket
alert("WebSocket NOT supported by your Browser!");
}
}
</script>
</head>
<body>
<div id = "sse">
<a href = "javascript:WebSocketTest()">Run WebSocket</a>
</div>
</body>
</html>[/CODE]
[CODE lang="java" title="Server"]import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.i
utputStream;import java.net.ServerSocket;
import java.net.Socket;
import java.nio.charset.StandardCharsets;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.util.Base64;
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Test {
public static void main(String[] args) throws IOException, NoSuchAlgorithmException {
ServerSocket server = new ServerSocket(11111);
try {
System.out.println("Server has started on 127.0.0.1:11111.\r\nWaiting for a connection...");
Socket client = server.accept();
System.out.println("A client connected.");
InputStream in = client.getInputStream();
OutputStream out = client.getOutputStream();
Scanner s = new Scanner(in, "UTF-8");
try {
String data = s.useDelimiter("\\r\\n\\r\\n").next();
Matcher get = Pattern.compile("^GET").matcher(data);
if (get.find()) {
Matcher match = Pattern.compile("Sec-WebSocket-Key: (.*)").matcher(data);
match.find();
byte[] response = ("HTTP/1.1 101 Switching Protocols\r\n"
+ "Connection: Upgrade\r\n"
+ "Upgrade: websocket\r\n"
+ "Sec-WebSocket-Accept: "
+ Base64.getEncoder().encodeToString(MessageDigest.getInstance("SHA-1").digest((match.group(1) + "258EAFA5-E914-47DA-95CA-C5AB0DC85B11").getBytes("UTF-8")))
+ "\r\n\r\n").getBytes("UTF-8");
out.write(response, 0, response.length);
out.flush();
while(true)
if(s.hasNextLine())
System.out.print("Input: " + s.nextLine());
}
} finally {
s.close();
}
} finally {
server.close();
}
}
}[/CODE]
Nachdem der Client (JavaScript-WebSocket) sich mit dem Server erfolgreich verbunden hat, sollte eigentlich die Methode einen String verschicken. Bei meinem Server kommt aber nichts an. Kann mir vielleicht wer helfen, Danke schomal im Vorraus.
