javaweb集成guacamole在html页面中展示

末蓝、 2023-02-13 11:09 393阅读 0赞

上一篇幅是介绍guacamole的安装，接下来说说使用

项目需求，需要在页面中集成远程桌面，要去掉基础认证。整体的方案有两种，都在这里说一下吧。

***一、不需要guacamole客户端，在自己项目中实现socket通道。与页面进行连接（建议使用第二种）***

1、环境准备

启动guacd服务

service guacd start

2、在自己的java项目中引入guacamole-common的包，版本与自己的guacd版本一致。

<dependency>
                <groupId>org.apache.guacamole</groupId>
                <artifactId>guacamole-common</artifactId>
                <version>1.0.0</version>
            </dependency>

3、自定义servlet实现GuacamoleHTTPTunnelServlet，官方截图如下

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FzZDM3MjUwNjU4OQ_size_16_color_FFFFFF_t_70][]

引入jar，之后创建MyGuacamoleHTTPTunnelServlet

package com.xx.guacalome;
    
    import org.apache.guacamole.GuacamoleException;
    import org.apache.guacamole.net.GuacamoleTunnel;
    import org.apache.guacamole.net.InetGuacamoleSocket;
    import org.apache.guacamole.net.SimpleGuacamoleTunnel;
    import org.apache.guacamole.protocol.ConfiguredGuacamoleSocket;
    import org.apache.guacamole.protocol.GuacamoleConfiguration;
    import org.apache.guacamole.servlet.GuacamoleHTTPTunnelServlet;
    import org.springframework.beans.factory.annotation.Value;
    
    import javax.servlet.annotation.WebServlet;
    import javax.servlet.http.HttpServletRequest;
    
    /**
     * @description:
     * @Author: huangsan
     * @Date: 2020/5/27 11:01 上午
     */
    @WebServlet(urlPatterns = "/tunnel")
    public class MyGuacamoleHTTPTunnelServlet extends GuacamoleHTTPTunnelServlet {
    
        @Value("${guacamole.guacd.host}")
        private String guacdHost;
        @Value("${guacamole.guacd.port}")
        private String guacdPort;
        @Value("${guacamole.target.protocol}")
        private String targetProtocol;
        @Value("${guacamole.target.host}")
        private String targetHost;
        @Value("${guacamole.target.port}")
        private String targetPort;
        @Value("${guacamole.target.username}")
        private String targetUsername;
        @Value("${guacamole.target.password}")
        private String targetPassword;
    
        
        @Override
        protected GuacamoleTunnel doConnect(HttpServletRequest httpServletRequest) throws GuacamoleException {
            System.out.println("-----------远程桌面调用成功");
            GuacamoleConfiguration config = new GuacamoleConfiguration();
            config.setProtocol(targetProtocol);
            config.setParameter("hostname", targetHost);
            config.setParameter("port", targetPort);
            config.setParameter("username", targetUsername);
            config.setParameter("password", targetPassword);
            return new SimpleGuacamoleTunnel(
                    new ConfiguredGuacamoleSocket(new InetGuacamoleSocket(this.guacdHost, Integer.parseInt(this.guacdPort)), config));
    
        }
    }

在yml配置文件中配置我们需要的value

guacamole:
      guacd:
        host: 10.0.30.50
        port: 4822
      target:
        protocol: rdp
        host: 10.0.30.224
        port: 3389
        username: admin
        password: 123456

启动类上配置@ServletComponentScan注解扫描servlet

启动项目即可，我们后台的通道就搭建完成

4、配置guacamole-common-js

创建前端html页面，在页面中定义展示区域的div。<div id="display"></div>

all.min.js获取的方法，在maven中依赖

<dependency>
                <groupId>org.apache.guacamole</groupId>
                <artifactId>guacamole-common-js</artifactId>
                <version>1.0.0</version>
            </dependency>

然后去maven仓库中找到这个包，解压之后就可以找到相关jar。

<%@ page language="java" contentType="text/html; charset=UTF-8"
             pageEncoding="UTF-8" %>
    <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
    <!DOCTYPE html>
    <html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
        <title>Guacamole show</title>
    </head>
    <body>
    <script type="text/javascript"
            src="${pageContext.request.contextPath }/static/js/bigData/deviceMonitor/all.min.js"></script>
    <div id="display"></div>
    <script type="text/javascript">
        let display = document.getElementById("display");
        let guac = new Guacamole.Client(
            new Guacamole.HTTPTunnel("http://localhost/tunnel")
            // new Guacamole.WebSocketTunnel('ws://localhost/websocket-tunnel'),
        );
        display.appendChild(guac.getDisplay().getElement());
        guac.connect();
        window.onunload = function () {
            guac.disconnect();
        }
        //下面是鼠标键盘是否支持
        let mouse = new Guacamole.Mouse(guac.getDisplay().getElement());
        mouse.onmousedown =
            mouse.onmouseup =
                mouse.onmousemove = function (mouseState) {
                    guac.sendMouseState(mouseState);
                };
        let keyboard = new Guacamole.Keyboard(document);
        keyboard.onkeydown = function (keysym) {
            guac.sendKeyEvent(1, keysym);
        };
        keyboard.onkeyup = function (keysym) {
            guac.sendKeyEvent(0, keysym);
        };
    </script>
    </body>
    </html>

guacamole client支持httptunnel或者websockettunnel 这里我们就配置一个httptunnel。

通道地址指向我们项目中暴露的servlet地址即可。

以上内容在guacamole的API中说的很详细，在页面中还支持展示更多内容，具体请参考html与js如下：

[http://guacamole.apache.org/doc/gug/guacamole-common-js.html][http_guacamole.apache.org_doc_gug_guacamole-common-js.html]

[http://guacamole.apache.org/doc/1.0.0/guacamole-common-js/][http_guacamole.apache.org_doc_1.0.0_guacamole-common-js]

二、依赖于guacamole的客户端和服务端来搞事情（以上的方法，需要在自己的项目中去引入其他的依赖，还不如利用其客户端当为服务一样使用）

1、环境准备

需要启动guacd的客户端和服务端，一个tomcat一个是service guacd start，就不赘述了。

2、与上面前端服务一样，创建html，指定展示区域div

3、编写js，如下（到这里就直接可以使用了，参数按照我这个来拼接就可以了，456节就是对这些参数的分析，如果是直接用的话就不用看下去了，当然想知道是什么的可以继续看下）

guac.onerror = function (error) {
        alert(error);
    };
    $.ajax({
        type: "POST",
        async: false,
        url: "http://10.0.30.50:8888/g/api/tokens",
        data: "username=hhb&password=hhb123",
    }).done(function (result) {
        guac.connect("token=" + result.authToken + '&GUAC_DATA_SOURCE=default&GUAC_ID=test1&GUAC_TYPE=c&GUAC_WIDTH=900');
    }).fail(function (result) {
        console.error("token error: ", result.status, result.statusText)
    });
    window.onunload = function () {
        guac.disconnect();
    }
    // Mouse  鼠标事件
    let mouse = new Guacamole.Mouse(guac.getDisplay().getElement());
    mouse.onmousedown =
    		mouse.onmouseup   =
    				mouse.onmousemove = function(mouseState) {
    					guac.sendMouseState(mouseState);
    				};
    // Keyboard 键盘事件
    let keyboard = new Guacamole.Keyboard(document);
    keyboard.onkeydown = function (keysym) {
    	guac.sendKeyEvent(1, keysym);
    };
    keyboard.onkeyup = function (keysym) {
    	guac.sendKeyEvent(0, keysym);
    };

4、讲解一下js内容，首先要解决认证的问题

官网的描述是可以在connect中传递任意数据，那么我们将获取的的token等信息就可以在connect的时候进行传递。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FzZDM3MjUwNjU4OQ_size_16_color_FFFFFF_t_70 1][]

那就先来获取token，我们看客户端登陆是如何获取token的，之后用ajax来模拟一个

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FzZDM3MjUwNjU4OQ_size_16_color_FFFFFF_t_70 2][]

ajax代码如上所示。

token拿到之后我们要封装到connect中去，这里我在api中是没有看到任何说明指出connect怎么来拼接，没办法了反正是开源的，down一下代码来读一读吧

下载github上代码

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FzZDM3MjUwNjU4OQ_size_16_color_FFFFFF_t_70 3][]

拿到代码就好办了我们来看一下。

5、在源码中找到我们想要的

\---我们如果自己创建的话是创建一个tunnel的servlet，所以我们全局搜索“/tunnel”。

\---在TunnelModule类中我么看到了configureServlets方法，从这里我们看出有两种方式一种http一种websocket

@Override
        protected void configureServlets() {
    
            bind(TunnelRequestService.class);
    
            // Set up HTTP tunnel
            serve("/tunnel").with(RestrictedGuacamoleHTTPTunnelServlet.class);
    
            // Try to load each WebSocket tunnel in sequence
            for (String classname : WEBSOCKET_MODULES) {
                if (loadWebSocketModule(classname)) {
                    logger.debug("WebSocket module loaded: {}", classname);
                    return;
                }
            }
    
            // Warn of lack of WebSocket
            logger.info("WebSocket support NOT present. Only HTTP will be used.");
    
        }

\---进入http的创建中我们看到

@Singleton
    public class RestrictedGuacamoleHTTPTunnelServlet extends GuacamoleHTTPTunnelServlet {
    
        /**
         * Service for handling tunnel requests.
         */
        @Inject
        private TunnelRequestService tunnelRequestService;
        
        /**
         * Logger for this class.
         */
        private static final Logger logger = LoggerFactory.getLogger(RestrictedGuacamoleHTTPTunnelServlet.class);
    
        @Override
        protected GuacamoleTunnel doConnect(HttpServletRequest request) throws GuacamoleException {
    
            // Attempt to create HTTP tunnel
            GuacamoleTunnel tunnel = tunnelRequestService.createTunnel(new HTTPTunnelRequest(request));
    
            // If successful, warn of lack of WebSocket
            logger.info("Using HTTP tunnel (not WebSocket). Performance may be sub-optimal.");
    
            return tunnel;
    
        }
    
    }

发现了一个和我们之前的实现思路一样的继承GuacamoleHTTPTunnelServlet

\---我们看到对HTTPTunnelRequest进行了封装参数是我么的HttpServletRequest

\---点进去发现其实就是把我们的httpservlet的参数拿出来而已

public HTTPTunnelRequest(HttpServletRequest request) {
    
            // For each parameter
            for (Map.Entry<String, String[]> mapEntry : ((Map<String, String[]>)
                    request.getParameterMap()).entrySet()) {
    
                // Get parameter name and corresponding values
                String parameterName = mapEntry.getKey();
                List<String> parameterValues = Arrays.asList(mapEntry.getValue());
    
                // Store copy of all values in our own map
                parameterMap.put(
                    parameterName,
                    new ArrayList<String>(parameterValues)
                );
    
            }
    
        }

\---看来我们只要把参数给http请求就可以了，那我们再来看看都需要哪些参数点到tunnelRequestService.createTunnel方法中

public GuacamoleTunnel createTunnel(TunnelRequest request)
                throws GuacamoleException {
    
            // Parse request parameters
            String authToken                = request.getAuthenticationToken();
            String id                       = request.getIdentifier();
            TunnelRequest.Type type         = request.getType();
            String authProviderIdentifier   = request.getAuthenticationProviderIdentifier();
            GuacamoleClientInformation info = getClientInformation(request);
    
            GuacamoleSession session = authenticationService.getGuacamoleSession(authToken);
            UserContext userContext = session.getUserContext(authProviderIdentifier);
    
            try {
    
                // Create connected tunnel using provided connection ID and client information
                GuacamoleTunnel tunnel = createConnectedTunnel(userContext, type, id, info);
    
                // Notify listeners to allow connection to be vetoed
                fireTunnelConnectEvent(session.getAuthenticatedUser(),
                        session.getAuthenticatedUser().getCredentials(), tunnel);
    
                // Associate tunnel with session
                return createAssociatedTunnel(tunnel, authToken, session, userContext, type, id);
    
            }
    
            // Ensure any associated session is invalidated if unauthorized
            catch (GuacamoleUnauthorizedException e) {
    
                // If there is an associated auth token, invalidate it
                if (authenticationService.destroyGuacamoleSession(authToken))
                    logger.debug("Implicitly invalidated session for token \"{}\".", authToken);
    
                // Continue with exception processing
                throw e;
    
            }
    
        }

\---重点来看

String authToken                = request.getAuthenticationToken();
    String id                       = request.getIdentifier();
    TunnelRequest.Type type         = request.getType();
    String authProviderIdentifier   = request.getAuthenticationProviderIdentifier();
    GuacamoleClientInformation info = getClientInformation(request);

首先前四个request的方法我们可以点进去看看，无非就是获取参数，但是id\\type\\authProviderIdentifier这三个参数都是必须的

public String getAuthenticationProviderIdentifier()
                throws GuacamoleException {
            return getRequiredParameter(AUTH_PROVIDER_IDENTIFIER_PARAMETER);
        }

\---既然知道了参数的key，那我们就可以在前端来模拟了，具体都有哪些参数可以参考

/*
     * Licensed to the Apache Software Foundation (ASF) under one
     * or more contributor license agreements.  See the NOTICE file
     * distributed with this work for additional information
     * regarding copyright ownership.  The ASF licenses this file
     * to you under the Apache License, Version 2.0 (the
     * "License"); you may not use this file except in compliance
     * with the License.  You may obtain a copy of the License at
     *
     *   http://www.apache.org/licenses/LICENSE-2.0
     *
     * Unless required by applicable law or agreed to in writing,
     * software distributed under the License is distributed on an
     * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
     * KIND, either express or implied.  See the License for the
     * specific language governing permissions and limitations
     * under the License.
     */
    
    package org.apache.guacamole.tunnel;
    
    import java.util.List;
    import org.apache.guacamole.GuacamoleClientException;
    import org.apache.guacamole.GuacamoleClientException;
    import org.apache.guacamole.GuacamoleException;
    import org.apache.guacamole.GuacamoleException;
    
    /**
     * A request object which provides only the functions absolutely required to
     * retrieve and connect to a tunnel.
     */
    public abstract class TunnelRequest {
    
        /**
         * The name of the request parameter containing the user's authentication
         * token.
         */
        public static final String AUTH_TOKEN_PARAMETER = "token";
    
        /**
         * The name of the parameter containing the identifier of the
         * AuthenticationProvider associated with the UserContext containing the
         * object to which a tunnel is being requested.
         */
        public static final String AUTH_PROVIDER_IDENTIFIER_PARAMETER = "GUAC_DATA_SOURCE";
    
        /**
         * The name of the parameter specifying the type of object to which a
         * tunnel is being requested. Currently, this may be "c" for a Guacamole
         * connection, or "g" for a Guacamole connection group.
         */
        public static final String TYPE_PARAMETER = "GUAC_TYPE";
    
        /**
         * The name of the parameter containing the unique identifier of the object
         * to which a tunnel is being requested.
         */
        public static final String IDENTIFIER_PARAMETER = "GUAC_ID";
    
        /**
         * The name of the parameter containing the desired display width, in
         * pixels.
         */
        public static final String WIDTH_PARAMETER = "GUAC_WIDTH";
    
        /**
         * The name of the parameter containing the desired display height, in
         * pixels.
         */
        public static final String HEIGHT_PARAMETER = "GUAC_HEIGHT";
    
        /**
         * The name of the parameter containing the desired display resolution, in
         * DPI.
         */
        public static final String DPI_PARAMETER = "GUAC_DPI";
    
        /**
         * The name of the parameter specifying one supported audio mimetype. This
         * will normally appear multiple times within a single tunnel request -
         * once for each mimetype.
         */
        public static final String AUDIO_PARAMETER = "GUAC_AUDIO";
    
        /**
         * The name of the parameter specifying one supported video mimetype. This
         * will normally appear multiple times within a single tunnel request -
         * once for each mimetype.
         */
        public static final String VIDEO_PARAMETER = "GUAC_VIDEO";
    
        /**
         * The name of the parameter specifying one supported image mimetype. This
         * will normally appear multiple times within a single tunnel request -
         * once for each mimetype.
         */
        public static final String IMAGE_PARAMETER = "GUAC_IMAGE";
    
        /**
         * All supported object types that can be used as the destination of a
         * tunnel.
         */
        public static enum Type {
    
            /**
             * A Guacamole connection.
             */
            CONNECTION("c"),
    
            /**
             * A Guacamole connection group.
             */
            CONNECTION_GROUP("g");
    
            /**
             * The parameter value which denotes a destination object of this type.
             */
            final String PARAMETER_VALUE;
            
            /**
             * Defines a Type having the given corresponding parameter value.
             *
             * @param value
             *     The parameter value which denotes a destination object of this
             *     type.
             */
            Type(String value) {
                PARAMETER_VALUE = value;
            }
    
        };
    
         //下面没用的都删掉了
    }

那我们来分析一下我们需要传的参数

"token=" + result.authToken + '&GUAC\_DATA\_SOURCE=default&GUAC\_ID=test1&GUAC\_TYPE=c&GUAC\_WIDTH=900'

\---token：不用说，为什么不是必须的参数，参考api的快速连接部分。

\---GUAC\_DATA\_SOURCE：在获取token的时候就传递回来了，我这里是default

{"authToken":"x","username":"hhb","dataSource":"default","availableDataSources":["quickconnect","default"]}

\---GUAC\_ID：就是我们user-mapping中的connect的name

\---GUAC\_TYPE：看源码发现是个枚举类型，这里我们没引入组的概念（1.1.0版本有），这里直接传c

public static enum Type {
    
            /**
             * A Guacamole connection.
             */
            CONNECTION("c"),
    
            /**
             * A Guacamole connection group.
             */
            CONNECTION_GROUP("g");
    
            /**
             * The parameter value which denotes a destination object of this type.
             */
            final String PARAMETER_VALUE;
            
            /**
             * Defines a Type having the given corresponding parameter value.
             *
             * @param value
             *     The parameter value which denotes a destination object of this
             *     type.
             */
            Type(String value) {
                PARAMETER_VALUE = value;
            }
    
        };

\---GUAC\_WIDTH：这属于随便的参数了，看个人需要我就指定了个宽度，你们可以自由继续拼装。

5、我们知道了connect中需要传递的一些参数，那就直接拼接出来即可，直接调用创建隧道。

6、总结：这种方法好处就是不用自己在项目中引入guacamole的内容了，不好的地方是我们需要解决跨域问题，虽然guacamole是个tomcat，但是我无论怎么配置跨域都没解决，没办法最后使用nginx来解决了。

以上就是web集成guacamole的两种方式了，其实思路就是一种，创建隧道与guacamole-common-js连接就可以了，有什么问题欢迎大家指出。

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FzZDM3MjUwNjU4OQ_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200528151615716.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FzZDM3MjUwNjU4OQ==,size_16,color_FFFFFF,t_70
[http_guacamole.apache.org_doc_gug_guacamole-common-js.html]: http://guacamole.apache.org/doc/gug/guacamole-common-js.html
[http_guacamole.apache.org_doc_1.0.0_guacamole-common-js]: http://guacamole.apache.org/doc/1.0.0/guacamole-common-js/
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FzZDM3MjUwNjU4OQ_size_16_color_FFFFFF_t_70 3]: https://img-blog.csdnimg.cn/2020052816082450.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2FzZDM3MjUwNjU4OQ==,size_16,color_FFFFFF,t_70