ssh - 如何在 Guacamole 中将主机名作为 ssh 的参数传递

Question

我尝试从下面的教程中构建一个用于 ssh 的演示 Guacamole 应用程序。

http://guac-dev.org/doc/gug/writing-you-own-guacamole-app.html

只要值是硬编码的，应用程序就可以正常工作。但我需要从用户那里获取主机名/IP。为了实现这一点，我尝试在下面的代码中使用 request.getParameter() :

package org.glyptodon.guacamole.net.example;

import javax.servlet.http.HttpServletRequest;
import org.glyptodon.guacamole.GuacamoleException;
import org.glyptodon.guacamole.net.GuacamoleSocket;
import org.glyptodon.guacamole.net.GuacamoleTunnel;
import org.glyptodon.guacamole.net.InetGuacamoleSocket;
import org.glyptodon.guacamole.net.SimpleGuacamoleTunnel;
import org.glyptodon.guacamole.protocol.ConfiguredGuacamoleSocket;
import org.glyptodon.guacamole.protocol.GuacamoleConfiguration;
import org.glyptodon.guacamole.servlet.GuacamoleHTTPTunnelServlet;

public class TutorialGuacamoleTunnelServlet
    extends GuacamoleHTTPTunnelServlet {

    @Override
    protected GuacamoleTunnel doConnect(HttpServletRequest request)
        throws GuacamoleException {

        // Create our configuration
        String hostname = request.getParameter("hostname");
        GuacamoleConfiguration config = new GuacamoleConfiguration();
        config.setProtocol("ssh");
        config.setParameter("hostname", hostname);
        config.setParameter("port", "22");

        // Connect to guacd - everything is hard-coded here.
        GuacamoleSocket socket = new ConfiguredGuacamoleSocket(
            new InetGuacamoleSocket("localhost", 4822),
            config
        );


        // Return a new tunnel which uses the connected socket
        return new SimpleGuacamoleTunnel(socket);

    }

}

但是当我尝试像localhost:8080/guacamole-tutorial-0.9.9?hostname=localhost那样使用它时，它不起作用。然而，如果我硬编码相同的值，它就可以正常工作。请帮帮我。

Answer 1

您需要使用 JavaScript 将这些参数传递给 Guacamole.Client 的 connect() 函数。 got from here

  <script type="text/javascript">

     // Get display div from document
     var display = document.getElementById("display");

     // Instantiate client, using an HTTP tunnel for communications.
     var guac = new Guacamole.Client(
         new Guacamole.HTTPTunnel("tunnel")
     );

     // Add client to display div
     display.appendChild(guac.getDisplay().getElement());

    // Error handler
     guac.onerror = function(error) {
         alert(error);
         console.log(error);
     };
     // Connect
     guac.connect('ip=192.168.99.100&user=root');** set parameters here**

     // Disconnect on close
     window.onunload = function() {
         guac.disconnect();
     }

   </script>

并在您的 TutorialGuacamoleTunnelServlet 中将其访问为

config.setProtocol("ssh");
config.setParameter("hostname", request.getParameter("ip"));
config.setParameter("username", request.getParameter("user"));