Connecting to socket on Tomcat?
I'm trying to connect from a standalone applet to a servlet running on tomcat:
Servlet
public void init(ServletConfig config) throws ServletException {
super.init(config);
// Start a daemon thread
try {
daemonThread = new Daemon(this);
daemonThread.start();
}
catch (Exception e) {
}
}
protected int getSocketPort() {
return 8080;
}
public void handleClient(Socket client){
new ScribbleThread(this, client).start();
}
protected void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
PrintWriter out = response.getWriter();
StringBuffer sb = new StringBuffer();
sb.append("<html><body bgcolor=pink text=red>");
sb.append("<h1 align=center>RUNNING</h1><hr>");
sb.append("</body></html>");
out.println(sb);
out.close();
}
}
Servlet's init() creates this:
class Daemon extends Thread {
private ServerSocket serverSocket;
private SocketServlet servlet;
public Daemon(SocketServlet servlet) {
this.servlet = servlet;
}
public void run() {
try {
// Create a server socket to accept connections
serverSocket = new ServerSocket(se开发者_如何学Crvlet.getSocketPort());
}
catch (Exception e) {
return;
}
try {
while (true) {
try {
servlet.handleClient(serverSocket.accept());
}
catch (IOException ioe) {
}
}
}
I have this deployed by eclipse to TomCat. My question is what address does my applet need to make the socket to? When i visit http://localhost:8080/scrabServ/connect I see the 'RUNNING' message from the doGet() so is that where it needs to point?
Applet:
public static String testConnection(){
InputStream in = null;
try {
// Make socket connection to servlet
String servlet = new String("localhost/scrabServ/connect");
Socket socket = new Socket(servlet, 8080);
this gives me:
Exception in testConnection()java.net.UnknownHostException: localhost/scrabServ/connect
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:195)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:432)
at java.net.Socket.connect(Socket.java:529)
at java.net.Socket.connect(Socket.java:478)
at java.net.Socket.<init>(Socket.java:375)
at java.net.Socket.<init>(Socket.java:189)
at scribble.Scribble.testConnection(Scribble.java:41)
at scribble.Scribble.main(Scribble.java:28)
and points to the new Socket(servlet, 8080) line.
You would have only to open a socket to "localhost", 8080 and then issue a GET scrabServ/connect command. You can't open a socket to a specific URL.
To communicate with a servlet you do it via request parameters, basically issuing a GET command such as: http://www.jmarshall.com/easy/http/http_footnotes.html#getsubmit
Maybe you should use URLConnection instead. If you detail what exactly you want to do, maybe I can have a better idea of how to help you, maybe a HTTP server is not even needed for what you want to do.
加载中,请稍侯......
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