commit 3cc518ea61aecab5de08d68b3a40c23a0b3e3c19
Author: Curiouser <rationalmonster@163.com>
Date:   Fri Jan 15 16:06:06 2021 +0800

    first commit

diff --git a/.gitignore b/.gitignore
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--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,5 @@
+statik
+openvpn-manager
+.idea
+.DS_Store
+.vscode
\ No newline at end of file
diff --git a/README.md b/README.md
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index 0000000..330ae58
--- /dev/null
+++ b/README.md
@@ -0,0 +1,49 @@
+# OpenVPN Manager 
+
+# 一、简介
+
+OpenVPN Manager，一个简单的OpenVPN Web管理工具。通过OpenVPN的管理端口获取数据，然后在Web页面上展示或者操作。
+
+OpenVPN的管理端口详细介绍文章，请参考：https://openvpn.net/community-resources/management-interface/
+
+# 二、功能
+
+- 显示当前登录的客户端信息
+- 可下线用户
+- 简单的用户名密码认证
+
+![](assets/openvpn-manager-1.png)
+
+
+# 三、安装部署
+
+## 1、部署所需条件：
+- **OpenVPN 服务端需要开起管理端口**
+
+  在OpenVPN服务端配置文件中追加`management 127.0.0.1 123456`，然后重启OpenVPN即可。
+
+- 支持的OpenVPN 版本
+  
+  2.4.x（2.4.4已测试）
+
+## 2、源码编译部署
+
+> 注意：编译安装时需要第三方命令行工具statik（statik可以将静态资源文件打包进二进制文件中）
+
+```bash
+git clone 
+cd openvpn-manager
+go get github.com/rakyll/statik
+go install github.com/rakyll/statik
+statik -src=$PWD/public
+CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -o openvpn-manager main.go 
+nohup ./openvpn-manager -host openvpn服务端主机IP地址 -port openvpn管理端口 -admin-passwd OpenVPN Manager管理员admin的密码 >> /var/log/openvpn-manager.log 2>&1 &
+```
+
+# 四、TODO
+
+新增功能
+- [ ] 增加显示最近五条登录日志
+- [ ] 增加新增用户的功能
+- [ ] 增加对低版本OpenVPN的支持
+- [ ] 增加Docker部署方式及二进制包下载集成
\ No newline at end of file
diff --git a/assets/openvpn-manager-1.png b/assets/openvpn-manager-1.png
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diff --git a/go.mod b/go.mod
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--- /dev/null
+++ b/go.mod
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+module curiouser.com/openvpn-manager
+
+go 1.14
+
+require (
+	github.com/gin-gonic/gin v1.6.3
+	github.com/gobuffalo/packr v1.30.1 // indirect
+	github.com/kr/pretty v0.2.1 // indirect
+	github.com/rakyll/statik v0.1.7
+	github.com/sirupsen/logrus v1.7.0
+	gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..e616a0f
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,122 @@
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+golang.org/x/tools v0.0.0-20190624180213-70d37148ca0c/go.mod h1:/rFqwRUd4F7ZHNgwSSTFct+R/Kf4OFW1sUzUTQQTgfc=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405 h1:yhCVgyC4o1eVCa2tZl7eS0r+SDo693bJlVdllGtEeKM=
+gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20180628173108-788fd7840127/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15 h1:YR8cESwS4TdDjEe65xsg0ogRM/Nc3DYOhEAlW+xobZo=
+gopkg.in/check.v1 v1.0.0-20190902080502-41f04d3bba15/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
+gopkg.in/errgo.v2 v2.1.0/go.mod h1:hNsd1EY+bozCKY1Ytp96fpM3vjJbqLJn88ws8XvfDNI=
+gopkg.in/yaml.v2 v2.2.2/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
+gopkg.in/yaml.v2 v2.2.8 h1:obN1ZagJSUGI0Ek/LBmuj4SNLPfIny3KsKFopxRdj10=
+gopkg.in/yaml.v2 v2.2.8/go.mod h1:hI93XBmqTisBFMUTm0b8Fm+jr3Dg1NNxqwp+5A1VGuI=
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..16d1732
--- /dev/null
+++ b/main.go
@@ -0,0 +1,156 @@
+//go:generate statik -src=./public
+package main
+
+import (
+	_ "curiouser.com/openvpn-manager/statik"
+	"encoding/json"
+	"flag"
+	"fmt"
+	"github.com/gin-gonic/gin"
+	"github.com/rakyll/statik/fs"
+	"log"
+	"net"
+	"net/http"
+	"os"
+	"regexp"
+	"strings"
+)
+
+type ClientConInfo struct {
+	Username                string `json:"username"`
+	IP                      string `json:"ip"`
+	Port                    string `json:"port"`
+	VIP                     string `json:"v_ip"`
+	ReceivedBytes           string `json:"received_bytes"`
+	SentBytes               string `json:"sent_bytes"`
+	ConnectedSinceTimestamp string `json:"connected_since_timestamp"`
+	ClientId                string `json:"client_id"`
+	PeerId                  string `json:"peer_id"`
+}
+
+type OnlineClients struct {
+	Onlineclients []ClientConInfo `json:"onlineclient"`
+}
+
+var (
+	ip_reg   = regexp.MustCompile(`(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)(\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)){3}`)
+	port_reg = regexp.MustCompile(`\((.*?)\)`)
+	omhost   string
+	omport   string
+	ompasswd string
+	omadminpassw string
+
+	router          *gin.Engine
+	authorizedRoute *gin.RouterGroup
+)
+
+func init() {
+
+	flag.StringVar(&omhost, "host", "", "OpenVPN服务端地址")
+	flag.StringVar(&omport, "port", "", "OpenVPN服务端管理端口，默认为空")
+	flag.StringVar(&ompasswd, "passwd", "", "OpenVPN服务端管理端口密码")
+	flag.StringVar(&omadminpassw,"admin-passwd","","OpenVPN Manager管理员admin的密码")
+	flag.Parse()
+
+	gin.SetMode(gin.ReleaseMode)
+	gin.ForceConsoleColor()
+	router = gin.Default()
+
+	authorizedRoute = router.Group("/", gin.BasicAuth(gin.Accounts{
+		"admin": omadminpassw,
+	}))
+
+}
+
+func main() {
+
+	if omhost == "" && omport == "" && omadminpassw == ""{
+		fmt.Println("没有设置OpenVPN服务端的主机IP地址、管理端口及管理员密码，请在启动命令后添加'-host'，'-port'，'-admin-passwd'参数设置")
+		os.Exit(0)
+	} else if omhost == "" {
+		fmt.Println("OpenVPN服务端主机IP地址没有设置，无法启动。请在启动命令后添加'-host'参数设置IP地址")
+		os.Exit(0)
+	} else if omport == "" {
+		fmt.Println("OpenVPN管理端口没有设置，无法启动。请在启动命令后添加'-port'参数设置管理端口号")
+		os.Exit(0)
+	}else if omadminpassw == "" {
+		fmt.Println("OpenVPN Manager管理员admin用户的密码没有设置，无法启动。请在启动命令后添加'-admin-passwd'参数进行设置")
+		os.Exit(0)
+	}
+
+	statikFS, err := fs.New()
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	//根路由设置首页跳转到'/public'加载'index.html'
+	router.GET("/", func(context *gin.Context) {
+		context.Request.URL.Path = "/public"
+		router.HandleContext(context)
+	})
+
+	authorizedRoute.StaticFS("/public", statikFS)
+	authorizedRoute.StaticFile("/favicon.ico", "./public/favicon.ico")
+
+	authorizedRoute.GET("/getOnlineClients", func(context *gin.Context) {
+
+		res := sendDataToSocket(omhost+":"+omport, "status")
+		origin_status := strings.Split(string(res[0:len(res)]), "\r\n")
+		var client *ClientConInfo
+		var oc OnlineClients
+		for _, s := range origin_status {
+			if find := strings.HasPrefix(s, "CLIENT_LIST"); find {
+				var b = strings.Split(s, ",")
+				client = &ClientConInfo{
+					Username: b[1],
+					//IP:                        ip_reg.FindAllString(b[2], -1)[0],
+					//Port:                      port_reg.FindAllString(b[2], -1)[0],
+					IP:                      strings.Split(b[2], ":")[0],
+					Port:                    strings.Split(b[2], ":")[1],
+					VIP:                     b[3],
+					ReceivedBytes:           b[5],
+					SentBytes:               b[6],
+					ConnectedSinceTimestamp: b[8],
+					ClientId:                b[10],
+					PeerId:                  b[11],
+				}
+				oc.Onlineclients = append(oc.Onlineclients, *client)
+			}
+		}
+
+		jsons, _ := json.Marshal(oc)
+		context.JSON(http.StatusOK, string(jsons))
+	})
+	authorizedRoute.POST("/kickOutClientByCN", func(context *gin.Context) {
+		username := context.PostForm("username")
+		_ = sendDataToSocket(omhost+":"+omport, "kill "+username)
+	})
+	fmt.Println("OpenVPN Manager监听端口9090，访问地址：http://127.0.0.1:9090")
+	router.Run(":9090")
+
+}
+
+func sendDataToSocket(conf string, msg string) (resData []byte) {
+
+	conn, err := net.Dial("tcp", conf)
+
+	if err != nil {
+		log.Fatalf("连接失败")
+	}
+	buf1 := make([]byte, 2048)
+	buf := make([]byte, 2048)
+	conn.Read(buf)
+	writeMsg := msg + "\n"
+	_, err = conn.Write([]byte(writeMsg))
+	if err != nil {
+		fmt.Printf("发送数据失败, %s\n", err)
+	}
+	_, err = conn.Read(buf1)
+	if err != nil {
+		fmt.Printf("读取数据失败, %s\n", err)
+	}
+	conn.Close()
+	return buf1
+
+}
+
diff --git a/public/index.html b/public/index.html
new file mode 100644
index 0000000..d9c93f7
--- /dev/null
+++ b/public/index.html
@@ -0,0 +1,86 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <title>OpenVPN Manager</title>
+</head>
+<body>
+
+
+<script type="text/javascript">
+    let reg = /\\/g;
+    function getBytesSize(size) {//把字节转换成正常文件大小
+        if (!size)  return "";
+        var num = 1024.00; //byte
+        if (size < num)
+            return size + "B";
+        if (size < Math.pow(num, 2))
+            return (size / num).toFixed(2) + "KB"; //kb
+        if (size < Math.pow(num, 3))
+            return (size / Math.pow(num, 2)).toFixed(2) + "MB"; //M
+        if (size < Math.pow(num, 4))
+            return (size / Math.pow(num, 3)).toFixed(2) + "G"; //G
+        return (size / Math.pow(num, 4)).toFixed(2) + "T"; //T
+    }
+
+    function formatDuring(mss){
+        var days = parseInt(mss / ( 60 * 60 * 24));
+        var hours = parseInt((mss % ( 60 * 60 * 24)) / ( 60 * 60));
+        var minutes = parseInt((mss % ( 60 * 60)) / 60);
+        var seconds = (mss % 60) ;
+        return days + " 天 " + hours + " 小时 " + minutes + " 分钟 ";
+    }
+    function getOnlineClients() {
+        var ajaxObj = new XMLHttpRequest();
+        ajaxObj.open('get', '/getOnlineClients');
+        ajaxObj.send();
+        ajaxObj.onreadystatechange = function () {
+            if (ajaxObj.readyState == 4 && ajaxObj.status == 200) {
+                var originData = ajaxObj.responseText.replace(reg,'').substr(1)
+                var originJsonData = originData.substring(0,originData.length - 1)
+                var myObj = JSON.parse(originJsonData);
+                var txt = "";
+                for (let x=0;x < myObj.onlineclient.length;x++){
+                    var nowTs=parseInt(new Date().getTime()/1000)
+                    txt += "<tr>"
+                        + "<td>" + x + "</td>"
+                        + "<td>" + myObj.onlineclient[x].username + "</td>"
+                        + "<td>" + myObj.onlineclient[x].ip + "</td>"
+                        + "<td>" + myObj.onlineclient[x].port + "</td>"
+                        + "<td>" + myObj.onlineclient[x].v_ip + "</td>"
+                        + "<td>" + getBytesSize(myObj.onlineclient[x].received_bytes) + "</td>"
+                        + "<td>" + getBytesSize(myObj.onlineclient[x].sent_bytes) + "</td>"
+                        + "<td>" + formatDuring(nowTs - myObj.onlineclient[x].connected_since_timestamp) + "</td>"
+                        + "<td >" + "<button class='kickOutBtn' client_username='"+myObj.onlineclient[x].username+"' style='cursor: pointer' type='button'>下线该用户</button>" + "</td>"
+                        + "</tr>";
+                }
+                document.querySelector("#onlineClientsTable").insertAdjacentHTML('afterBegin',txt)
+            }
+        }
+    }
+    function kickOutClientByCN(userName) {
+
+        var ajaxObj = new XMLHttpRequest();
+        var formData = new FormData();
+        // console.log(formData);
+        formData.append("username", userName);
+        ajaxObj.open('post', "/kickOutClientByCN",false,);
+        ajaxObj.send(formData);
+    };
+    window.onload=function() {
+        getOnlineClients();
+        document.getElementById("onlineClientsTable").addEventListener('click', function (e) {
+            if(e.target.className === 'kickOutBtn') {
+                kickOutClientByCN(e.target.getAttribute('client_username'));
+            }
+        })
+    }
+</script>
+<h1 align="center">OpenVPN在线用户列表</h1>
+<table width="1300" height="100" border="2" cellpadding="15" cellspacing="0" align="center" >
+    <tr>  <th>ID</th>   <th>用户名</th> <th>客户端路由公网IP地址</th> <th>端口</th> <th>虚拟IP地址</th> <th>接收数据大小</th> <th>发送数据大小</th> <th>连接时间</th> <th>是否下线用户</th> </tr>
+    <tbody id="onlineClientsTable"> </tbody>
+</table>
+
+</body>
+</html>