models/server: add dashboard for frps by gin

conf/frps.ini

@@ -2,8 +2,10 @@
 [common]
 bind_addr = 0.0.0.0
 bind_port = 7000
-# optional
+# if you want to support virtual host, you must set the http port for listening (optional)
 vhost_http_port = 80
+# if you want to configure or reload frps by dashboard, dashboard_port is needed 
+dashboard_port = 7500
 # console or real logFile path like ./frps.log
 log_file = ./frps.log
 # debug, info, warn, error

src/frp/cmd/frps/main.go

@@ -111,6 +111,15 @@ func main() {
 		}
 	}
 
+	// create dashboard web server if DashboardPort != 0
+	if server.DashboardPort != 0 {
+		err := server.RunDashboardServer(server.BindAddr, server.DashboardPort)
+		if err != nil {
+			log.Error("Create dashboard web server error, %v", err)
+			os.Exit(1)
+		}
+	}
+
 	log.Info("Start frps success")
 	ProcessControlConn(l)
 }

src/frp/models/server/config.go

@@ -28,7 +28,8 @@ import (
 var (
 	BindAddr         string = "0.0.0.0"
 	BindPort         int64  = 7000
-	VhostHttpPort    int64  = 0 // if VhostHttpPort equals 0, do not listen a public port for http
+	VhostHttpPort    int64  = 0 // if VhostHttpPort equals 0, don't listen a public port for http
+	DashboardPort    int64  = 0 // if DashboardPort equals 0, dashboard is not available
 	LogFile          string = "console"
 	LogWay           string = "console" // console or file
 	LogLevel         string = "info"
@@ -68,6 +69,13 @@ func LoadConf(confFile string) (err error) {
 		VhostHttpPort = 0
 	}
 
+	tmpStr, ok = conf.Get("common", "dashboard_port")
+	if ok {
+		DashboardPort, _ = strconv.ParseInt(tmpStr, 10, 64)
+	} else {
+		DashboardPort = 0
+	}
+
 	tmpStr, ok = conf.Get("common", "log_file")
 	if ok {
 		LogFile = tmpStr

src/frp/models/server/dashboard.go

@@ -0,0 +1,35 @@
+// Copyright 2016 fatedier, fatedier@gmail.com
+//
+// Licensed 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 server
+
+import (
+	"fmt"
+
+	"github.com/gin-gonic/gin"
+)
+
+func RunDashboardServer(addr string, port int64) (err error) {
+	defer func() {
+		if r := recover(); r != nil {
+			err = fmt.Errorf("%v", r)
+		}
+	}()
+	gin.SetMode(gin.ReleaseMode)
+	router := gin.New()
+	router.LoadHTMLGlob("assets/*")
+	router.GET("/api/reload", apiReload)
+	go router.Run(fmt.Sprintf("%s:%d", addr, port))
+	return
+}

src/frp/models/server/dashboard_api.go

@@ -0,0 +1,26 @@
+// Copyright 2016 fatedier, fatedier@gmail.com
+//
+// Licensed 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 server
+
+import (
+	"github.com/gin-gonic/gin"
+)
+
+func apiReload(c *gin.Context) {
+	c.JSON(200, gin.H{
+		"code": 0,
+		"msg":  "ok",
+	})
+}