[英]Connect to Secure Socket Server written in C++ with client written in JavaScript
[英]Socket server not connect with JavaScript socket client
下面是套接字的代碼。
import java.io.*;
import java.net.ServerSocket;
import java.net.Socket;
import java.net.SocketException;
import java.util.Random;
public class ChatSocketServer {
private ServerSocket severSocket = null;
private Socket socket = null;
private InputStream inStream = null;
private OutputStream outStream = null;
public ChatSocketServer() {
}
public void createSocket() {
try {
ServerSocket serverSocket = new ServerSocket(3339);
while (true) {
socket = serverSocket.accept();
inStream = socket.getInputStream();
outStream = socket.getOutputStream();
System.out.println("Server Connected");
createReadThread();
createWriteThread();
}
} catch (IOException io) {
io.printStackTrace();
}
}
public void createReadThread() {
Thread readThread = new Thread() {
public void run() {
while (socket.isConnected()) {
try {
byte[] readBuffer = new byte[200];
int num = inStream.read(readBuffer);
if (num > 0) {
byte[] arrayBytes = new byte[num];
System.arraycopy(readBuffer, 0, arrayBytes, 0, num);
String recvedMessage = new String(arrayBytes, "UTF-8");
System.out.println("server received :" + recvedMessage);
} else {
notify();
}
;
//System.arraycopy();
} catch (SocketException se) {
System.exit(0);
} catch (IOException i) {
i.printStackTrace();
}
}
}
};
readThread.setPriority(Thread.MAX_PRIORITY);
readThread.start();
}
public void createWriteThread() {
Thread writeThread = new Thread() {
public void run() {
while (socket.isConnected()) {
try {
while(true){
synchronized (socket) {
Random random = new Random();
int i = random.nextInt(100);
outStream.write(Integer.toString(i).getBytes("UTF-8"));
sleep(100);
}
}/*
BufferedReader inputReader = new BufferedReader(new InputStreamReader(System.in));
sleep(100);
String typedMessage = inputReader.readLine();
if (typedMessage != null && typedMessage.length() > 0) {
synchronized (socket) {
outStream.write(typedMessage.getBytes("UTF-8"));
sleep(100);
}
} else {
notify();
}
;*/
//System.arraycopy();
} catch (IOException i) {
i.printStackTrace();
} catch (InterruptedException ie) {
ie.printStackTrace();
}
}
}
};
writeThread.setPriority(Thread.MAX_PRIORITY);
writeThread.start();
}
public static void main(String[] args) {
System.out.println("char socket server got started");
ChatSocketServer chatServer = new ChatSocketServer();
chatServer.createSocket();
}
}
當我嘗試與Java套接字客戶端連接時,上面的代碼工作正常。 不知道為什么在與JavaScript連接時會引發錯誤。
的JavaScript
try{
var host = "ws://localhost:3339/";
var socket = new WebSocket(host);
console.log(socket.readyState);
socket.onopen = function(){
console.log(socket.readyState);
};
socket.onmessage = function(msg){
console.log(msg.data);
};
socket.onclose = function(){
console.log(socket.readyState);
};
socket.onerror = function(error) {
// connection failed - try polling
console.log(socket.readyState);
};
} catch(exception){
console.log(exception);
}
當我嘗試從JavaScript讀取值時,它將引發以下錯誤:
WebSocket與'ws:// localhost:3339 /'的連接失敗:WebSocket握手期間出錯:狀態行無效
但是我可以使用Java代碼在服務器和客戶端之間進行同步。
一個webSocket連接需要一個特定的webSocket服務器,而不僅僅是一個普通的TCP服務器。 當瀏覽器使用webSocket連接時,它具有特定的連接順序(以HTTP請求開始,然后升級為webSocket連接),並且具有特定的安全方案,並且具有用於發送數據的特定數據格式。 服務器必須支持所有這些,才能正確接受瀏覽器的webSocket連接並與之通信。
關於invalid handshake
的錯誤僅表示瀏覽器嘗試連接,但服務器未針對webSocket協議提供正確的響應。
由於服務器看起來像是用Java編寫的,因此有許多Java的webSocket服務器實現。 您可能應該抓住其中一個並使用它,而不是自己實現整個webSocket連接方案和協議。
您可能會發現這篇文章很有幫助:
如何使用JSR 356 API構建Java WebSocket應用程序
這是關於其他用於Java的webSocket庫的答案(也許有些過時):
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