serialize config sections to string;

add and update with different url

assets/static/js/index-proxy-list.js

@@ -2,6 +2,15 @@ var loadProxyInfo = (function ($) {
     var i18n = {};
     //param names in Basic tab
     var basicParamNames = ['name', 'type', 'local_ip', 'local_port', 'custom_domains', 'subdomain', 'remote_port', 'use_encryption', 'use_compression'];
+    //param need to convert type
+    var intParamNames = ['local_port', 'health_check_timeout_s', 'health_check_max_failed', 'health_check_interval_s'];
+    var booleanParamNames = ['use_encryption', 'use_compression'];
+    var stringArrayParamNames = ['custom_domains', 'locations']
+    var mapParamPrefixes = [
+        {name: 'metas', prefix: 'meta_'},
+        {name: 'plugin_params', prefix: 'plugin_'},
+        {name: 'headers', prefix: 'header_'}
+    ];
 
     /**
      * get proxy info
@@ -46,6 +55,7 @@ var loadProxyInfo = (function ($) {
 
         var $section = $('#content > section');
         var cols = [
+            {type: 'checkbox'},
             {field: 'name', title: 'Name', sort: true},
             {field: 'type', title: 'Type', sort: true},
             {field: 'local_ip', title: 'Local Ip', sort: true},
@@ -92,7 +102,9 @@ var loadProxyInfo = (function ($) {
 
             switch (obj.event) {
                 case 'add':
-                    proxyPopup(type, null);
+                    proxyPopup(type, {
+                        type: type
+                    }, false);
                     break
                 case 'remove':
                     // batchRemovePopup(data);
@@ -109,7 +121,8 @@ var loadProxyInfo = (function ($) {
 
             switch (obj.event) {
                 case 'update':
-                    proxyPopup(type, data);
+                    data.oldName = data.name;
+                    proxyPopup(type, data, true);
                     break;
                 case 'remove':
                     // removePopup(data);
@@ -119,11 +132,12 @@ var loadProxyInfo = (function ($) {
     }
 
     /**
-     * add proxy popup
+     * addOrUpdate proxy popup
      * @param type proxy type
      * @param data {Map<string,object>} proxy data
+     * @param update update flag. true - update, false - add
      */
-    function proxyPopup(type, data) {
+    function proxyPopup(type, data, update) {
         var basicData = {};
         var extraData = [];
         if (data != null) {
@@ -155,8 +169,15 @@ var loadProxyInfo = (function ($) {
             btn: ['Confirm', 'Cancel'],
             btn1: function (index) {
                 if (layui.form.validate('#addProxyTemplate')) {
-                    var formData = layui.form.val('addProxyTemplate');
-                    add(formData, index);
+                    var formData = layui.form.val('addProxyForm');
+                    var $items = $('#addProxyForm .extra-param-tab-item .extra-param-item');
+                    $items.each(function () {
+                        var name = $(this).find('input').first().val();
+                        var value = $(this).find('input').last().val();
+                        formData[name] = value;
+                    });
+
+                    addOrUpdate(type, formData, index, update);
                 }
             },
             btn2: function (index) {
@@ -169,6 +190,43 @@ var loadProxyInfo = (function ($) {
         });
     }
 
+
+    /**
+     * repack form data
+     * @param formData
+     * @returns {*}
+     */
+    function repackData(formData) {
+        mapParamPrefixes.forEach(function (temp) {
+            var name = temp.name;
+            var prefix = temp.prefix;
+            for (var key in formData) {
+                if (key !== name && key.startsWith(prefix)) {
+                    formData[name] = formData[name] || {};
+                    var newKey = key.replace(prefix, '');
+                    formData[name][newKey] = formData[key];
+                    delete formData[key];
+                }
+            }
+        });
+        intParamNames.forEach(function (paramName) {
+            if (formData.hasOwnProperty(paramName) && formData[paramName] !== '') {
+                formData[paramName] = parseInt(formData[paramName]);
+            }
+        });
+        booleanParamNames.forEach(function (paramName) {
+            if (formData.hasOwnProperty(paramName) && formData[paramName] !== '') {
+                formData[paramName] = formData[paramName] === 'true';
+            }
+        });
+        stringArrayParamNames.forEach(function (paramName) {
+            if (formData.hasOwnProperty(paramName) && formData[paramName] !== '') {
+                formData[paramName] = formData[paramName].split(',');
+            }
+        });
+        return formData;
+    }
+
     function proxyPopupSuccess(layero, index, that) {
         layui.form.render(null, 'addProxyForm');
         layui.form.on('input-affix(addition)', function (obj) {
@@ -181,15 +239,15 @@ var loadProxyInfo = (function ($) {
                 name: name,
                 value: value
             });
-            $paramValue.closest('.layui-tab-item').prepend(formItem);
+            $paramValue.closest('.layui-tab-item').append(formItem);
             $paramName.val('');
             $paramValue.val('');
 
             layui.form.render();
 
-            var tabContent = $paramValue.closest('.layui-tab-content');
-            var scrollHeight = tabContent.prop("scrollHeight");
-            tabContent.scrollTop(scrollHeight)
+            // var tabContent = $paramValue.closest('.layui-tab-content');
+            // var scrollHeight = tabContent.prop("scrollHeight");
+            // tabContent.scrollTop(scrollHeight)
         });
         layui.form.on('input-affix(subtraction)', function (obj) {
             var $elem = $(obj.elem);
@@ -198,62 +256,32 @@ var loadProxyInfo = (function ($) {
     }
 
     /**
-     * add proxy action
-     * @param data {{user:string, token:string, comment:string, enable:boolean, ports:[string|number], domains:[string], subdomains:[string]}} user data
+     * addOrUpdate proxy action
+     * @param type proxy type
+     * @param data proxy data
      * @param index popup index
+     * @param update update flag. true - update, false - add
      */
-    function add(data, index) {
+    function addOrUpdate(type, data, index, update) {
         var loading = layui.layer.load();
+        var url = '';
+        if (update) {
+            url = '/update';
+        } else {
+            url = '/add?type=' + type;
+        }
         $.ajax({
-            url: '/add',
+            url: url,
             type: 'post',
             contentType: 'application/json',
             data: JSON.stringify(data),
-            success: function (result) {
-                // if (result.success) {
-                //     reloadTable();
-                //     layui.layer.close(index);
-                //     layui.layer.msg(i18n['OperateSuccess'], function (index) {
-                //         layui.layer.close(index);
-                //     });
-                // } else {
-                //     errorMsg(result);
-                // }
-            },
-            complete: function () {
-                layui.layer.close(loading);
-            }
-        });
-    }
-
-    /**
-     * update proxy action
-     * @param before {{user:string, token:string, comment:string, enable:boolean, ports:[string|number], domains:[string], subdomains:[string]}} data before update
-     * @param after {{user:string, token:string, comment:string, enable:boolean, ports:[string|number], domains:[string], subdomains:[string]}} data after update
-     */
-    function update(before, after) {
-        before.ports.forEach(function (port, index) {
-            if (/^\d+$/.test(String(port))) {
-                before.ports[index] = parseInt(String(port));
-            }
-        });
-        after.ports.forEach(function (port, index) {
-            if (/^\d+$/.test(String(port)) && typeof port === "string") {
-                after.ports[index] = parseInt(String(port));
-            }
-        });
-        var loading = layui.layer.load();
-        $.ajax({
-            url: '/update',
-            type: 'post',
-            contentType: 'application/json',
-            data: JSON.stringify({
-                before: before,
-                after: after,
-            }),
             success: function (result) {
                 if (result.success) {
-                    layui.layer.msg(i18n['OperateSuccess']);
+                    reloadTable();
+                    layui.layer.close(index);
+                    layui.layer.msg('OperateSuccess', function (index) {
+                        layui.layer.close(index);
+                    });
                 } else {
                     errorMsg(result);
                 }
@@ -281,5 +309,36 @@ var loadProxyInfo = (function ($) {
         });
     }
 
+    /**
+     * reload user table
+     */
+    function reloadTable() {
+        // var searchData = layui.form.val('searchForm');
+        var searchData = {};
+        layui.table.reloadData('tokenTable', {
+            where: searchData
+        }, true)
+    }
+
+    /**
+     * show error message popup
+     * @param result
+     */
+    function errorMsg(result) {
+        layui.layer.msg(result.message);
+        // var reason = i18n['OtherError'];
+        // if (result.code === 1)
+        //     reason = i18n['ParamError'];
+        // else if (result.code === 2)
+        //     reason = i18n['SaveError'];
+        // else if (result.code === 3)
+        //     reason = i18n['FrpServerError'];
+        // else if (result.code === 4)
+        //     reason = i18n['ProxyExist'];
+        // else if (result.code === 5)
+        //     reason = i18n['ProxyNotExist'];
+        // layui.layer.msg(i18n['OperateFailed'] + ',' + reason)
+    }
+
     return loadProxyInfo;
 })(layui.$);

assets/templates/index.html

@@ -163,8 +163,7 @@
                     <div class="layui-form-item">
                         <label class="layui-form-label">ProxyType</label>
                         <div class="layui-input-block">
-                            <input type="text" name="type" value="{{= d.type.toUpperCase() }}" readonly
-                                   class="layui-input">
+                            <input type="text" name="type" readonly class="layui-input">
                         </div>
                     </div>
                     <div class="layui-form-item">
@@ -192,7 +191,7 @@
                     <div class="layui-form-item layui-form-text http https">
                         <label class="layui-form-label">Subdomain</label>
                         <div class="layui-input-block">
-                            <textarea name="subdomain" placeholder="Subdomain" autocomplete="off"
+                            <textarea name="sub_domain" placeholder="Subdomain" autocomplete="off"
                                       class="layui-textarea"></textarea>
                         </div>
                     </div>
@@ -226,29 +225,29 @@
                     </div>
                 </div>
                 <div class="layui-tab-item extra-param-tab-item">
-                    {{# layui.each(d.extraData, function(index, extra){ }}
                     <div class="layui-form-item">
                         <div class="layui-input-inline">
-                            <input type="text" name="paramName" value="{{= extra.name}}" class="layui-input"
+                            <input type="text" class="layui-input" placeholder="paramName">
+                        </div>
+                        <div class="layui-form-mid">=</div>
+                        <div class="layui-input-inline">
+                            <input type="text" class="layui-input" lay-filter="addition"
+                                   lay-affix="addition" placeholder="paramValue">
+                        </div>
+                    </div>
+                    {{# layui.each(d.extraData, function(index, extra){ }}
+                    <div class="layui-form-item extra-param-item">
+                        <div class="layui-input-inline">
+                            <input type="text" value="{{= extra.name}}" class="layui-input"
                                    placeholder="paramName">
                         </div>
                         <div class="layui-form-mid">=</div>
                         <div class="layui-input-inline">
-                            <input type="text" name="paramValue" value="{{= extra.value }}" class="layui-input"
+                            <input type="text" value="{{= extra.value }}" class="layui-input"
                                    lay-filter="subtraction" lay-affix="subtraction" placeholder="paramValue">
                         </div>
                     </div>
                     {{# }); }}
-                    <div class="layui-form-item">
-                        <div class="layui-input-inline">
-                            <input type="text" name="paramName" class="layui-input" placeholder="paramName">
-                        </div>
-                        <div class="layui-form-mid">=</div>
-                        <div class="layui-input-inline">
-                            <input type="text" name="paramValue" class="layui-input" lay-filter="addition"
-                                   lay-affix="addition" placeholder="paramValue">
-                        </div>
-                    </div>
                 </div>
             </div>
         </div>
@@ -256,13 +255,13 @@
 </script>
 
 <script type="text/html" id="extraParamAddedTemplate">
-    <div class="layui-form-item">
+    <div class="layui-form-item extra-param-item">
         <div class="layui-input-inline">
-            <input type="text" name="paramName" value="{{= d.name}}" class="layui-input" placeholder="paramName">
+            <input type="text" value="{{= d.name}}" class="layui-input" placeholder="paramName">
         </div>
         <div class="layui-form-mid">=</div>
         <div class="layui-input-inline">
-            <input type="text" name="paramValue" value="{{= d.value }}" class="layui-input"
+            <input type="text" value="{{= d.value }}" class="layui-input"
                    lay-filter="subtraction" lay-affix="subtraction" placeholder="paramValue">
         </div>
     </div>

pkg/server/controller/controller.go

@@ -1,9 +1,9 @@
 package controller
 
 import (
+	"bytes"
 	"crypto/tls"
 	"fmt"
-	"github.com/fatedier/frp/pkg/config"
 	ginI18n "github.com/gin-contrib/i18n"
 	"github.com/gin-gonic/gin"
 	"github.com/vaughan0/go-ini"
@@ -77,37 +77,52 @@ func (c *HandleController) MakeLangFunc() func(context *gin.Context) {
 
 func (c *HandleController) MakeAddProxyFunc() func(context *gin.Context) {
 	return func(context *gin.Context) {
-		proxyType, exist := context.GetQuery("type")
-		if !exist {
-
-		}
-
-		proxy, exist := proxyConfTypeMap[proxyType]
-		if !exist {
-
-		}
+		proxy := ini.Section{}
 
 		response := OperationResponse{
 			Success: true,
 			Code:    Success,
-			Message: "user add success",
+			Message: "proxy add success",
 		}
 
 		err := context.BindJSON(&proxy)
 		if err != nil {
 			response.Success = false
 			response.Code = ParamError
-			response.Message = fmt.Sprintf("user add failed, param error : %v", err)
+			response.Message = fmt.Sprintf("proxy add failed, param error : %v", err)
 			log.Printf(response.Message)
 			context.JSON(http.StatusOK, &response)
 			return
 		}
 
-		err = c.reloadFrpc()
-		if err != nil {
+		name := proxy["name"]
+
+		if trimString(name) == "" {
+			response.Success = false
+			response.Code = ParamError
+			response.Message = fmt.Sprintf("proxy add failed, proxy name invalid")
+			log.Printf(response.Message)
+			context.JSON(http.StatusOK, &response)
+			return
+		}
+
+		if _, exist := clientProxies[name]; exist {
+			response.Success = false
+			response.Code = ProxyExist
+			response.Message = fmt.Sprintf("proxy add failed, proxy exist")
+			log.Printf(response.Message)
+			context.JSON(http.StatusOK, &response)
+			return
+		}
+
+		delete(proxy, "name")
+		clientProxies[name] = proxy
+
+		res := c.ReloadFrpc()
+		if !res.Success {
 			response.Success = false
 			response.Code = SaveError
-			response.Message = fmt.Sprintf("add failed, error : %v", err)
+			response.Message = fmt.Sprintf("proxy add failed, error : %v", res.Message)
 			log.Printf(response.Message)
 			context.JSON(http.StatusOK, &response)
 			return
@@ -119,20 +134,12 @@ func (c *HandleController) MakeAddProxyFunc() func(context *gin.Context) {
 
 func (c *HandleController) MakeUpdateProxyFunc() func(context *gin.Context) {
 	return func(context *gin.Context) {
-		proxyType, exist := context.GetQuery("type")
-		if !exist {
-
-		}
-
-		proxy, exist := proxyConfTypeMap[proxyType]
-		if !exist {
-
-		}
+		proxy := ini.Section{}
 
 		response := OperationResponse{
 			Success: true,
 			Code:    Success,
-			Message: "user update success",
+			Message: "proxy update success",
 		}
 
 		err := context.BindJSON(&proxy)
@@ -145,11 +152,39 @@ func (c *HandleController) MakeUpdateProxyFunc() func(context *gin.Context) {
 			return
 		}
 
-		err = c.reloadFrpc()
-		if err != nil {
+		oldName := proxy["oldName"]
+		name := proxy["name"]
+
+		if trimString(oldName) == "" || trimString(name) == "" {
+			response.Success = false
+			response.Code = ParamError
+			response.Message = fmt.Sprintf("proxy add failed, proxy name invalid")
+			log.Printf(response.Message)
+			context.JSON(http.StatusOK, &response)
+			return
+		}
+
+		if oldName != name {
+			if _, exist := clientProxies[name]; exist {
+				response.Success = false
+				response.Code = ProxyExist
+				response.Message = fmt.Sprintf("proxy update failed, proxy exist")
+				log.Printf(response.Message)
+				context.JSON(http.StatusOK, &response)
+				return
+			}
+		}
+
+		delete(proxy, "name")
+		delete(proxy, oldName)
+		delete(clientProxies, oldName)
+		clientProxies[name] = proxy
+
+		res := c.ReloadFrpc()
+		if res.Code != Success {
 			response.Success = false
 			response.Code = SaveError
-			response.Message = fmt.Sprintf("user update failed, error : %v", err)
+			response.Message = fmt.Sprintf("user update failed, error : %v", res.Message)
 			log.Printf(response.Message)
 			context.JSON(http.StatusOK, &response)
 			return
@@ -161,15 +196,7 @@ func (c *HandleController) MakeUpdateProxyFunc() func(context *gin.Context) {
 
 func (c *HandleController) MakeRemoveProxyFunc() func(context *gin.Context) {
 	return func(context *gin.Context) {
-		proxyType, exist := context.GetQuery("type")
-		if !exist {
-
-		}
-
-		proxy, exist := proxyConfTypeMap[proxyType]
-		if !exist {
-
-		}
+		proxy := make(map[string]interface{})
 
 		response := OperationResponse{
 			Success: true,
@@ -187,11 +214,11 @@ func (c *HandleController) MakeRemoveProxyFunc() func(context *gin.Context) {
 			return
 		}
 
-		err = c.reloadFrpc()
-		if err != nil {
+		res := c.ReloadFrpc()
+		if !res.Success {
 			response.Success = false
 			response.Code = SaveError
-			response.Message = fmt.Sprintf("user update failed, error : %v", err)
+			response.Message = fmt.Sprintf("user update failed, error : %v", res.Message)
 			log.Printf(response.Message)
 			context.JSON(http.StatusOK, &response)
 			return
@@ -269,7 +296,7 @@ func (c *HandleController) MakeProxyFunc() func(context *gin.Context) {
 		if serverApi == "/api/config" {
 			proxyType, _ := context.GetQuery("type")
 			content := fmt.Sprintf("%s", res.Data)
-			configure, err := parseConfigure(content, trimString(proxyType))
+			configure, err := c.parseConfigure(content, trimString(proxyType))
 
 			if err != nil {
 				res.Success = false
@@ -283,33 +310,85 @@ func (c *HandleController) MakeProxyFunc() func(context *gin.Context) {
 	}
 }
 
-func parseConfigure(content, proxyType string) (interface{}, error) {
+func (c *HandleController) ReloadFrpc() ProxyResponse {
+	var client *http.Client
+	var protocol string
 
-	if proxyType == "none" {
-		common, err := config.UnmarshalClientConfFromIni(content)
-
-		if err != nil {
-			return nil, err
+	if c.CommonInfo.DashboardTls {
+		client = &http.Client{
+			Transport: &http.Transport{
+				TLSClientConfig: &tls.Config{
+					InsecureSkipVerify: true,
+				},
+			},
 		}
-
-		return common, nil
-	}
-
-	cfg, err := ini.Load(strings.NewReader(content))
-	proxyList := make(map[string]ini.Section)
-	for name, section := range cfg {
-		if name == "common" {
-			continue
-		}
-		if proxyType != "" && strings.ToLower(section["type"]) != strings.ToLower(proxyType) {
-			continue
-		}
-		proxyList[name] = section
-	}
-
-	if err != nil {
-		return nil, err
+		protocol = "https://"
 	} else {
-		return proxyList, nil
+		client = http.DefaultClient
+		protocol = "http://"
+	}
+
+	res := ProxyResponse{}
+	host := c.CommonInfo.DashboardAddr
+	port := c.CommonInfo.DashboardPort
+	serverApi := "/api/config"
+	requestUrl := protocol + host + ":" + strconv.Itoa(port) + serverApi
+	request, _ := http.NewRequest("PUT", requestUrl, bytes.NewReader(serializeSectionsToString()))
+	username := c.CommonInfo.DashboardUser
+	password := c.CommonInfo.DashboardPwd
+	if trimString(username) != "" && trimString(password) != "" {
+		request.SetBasicAuth(username, password)
+	}
+
+	response, err := client.Do(request)
+
+	if err != nil {
+		res.Code = FrpServerError
+		res.Success = false
+		res.Message = err.Error()
+		log.Print(err)
+		return res
+	}
+
+	res.Code = response.StatusCode
+	body, err := io.ReadAll(response.Body)
+
+	if err != nil {
+		res.Success = false
+		res.Message = err.Error()
+	} else {
+		if res.Code == http.StatusOK {
+			res.Success = true
+			res.Data = string(body)
+			res.Message = fmt.Sprintf("Proxy to %s success", requestUrl)
+		} else {
+			res.Success = false
+			if res.Code == http.StatusNotFound {
+				res.Message = fmt.Sprintf("Proxy to %s error: url not found", requestUrl)
+			} else {
+				res.Message = fmt.Sprintf("Proxy to %s error: %s", requestUrl, string(body))
 			}
 		}
+	}
+	log.Printf(res.Message)
+	return res
+}
+
+func serializeSectionsToString() []byte {
+	var build strings.Builder
+	build.WriteString("[common]\n")
+	for key, value := range clientCommon {
+		build.WriteString(fmt.Sprintf("%s = %s\n", key, value))
+	}
+	build.WriteString("\n")
+
+	for name, section := range clientProxies {
+		build.WriteString(fmt.Sprintf("[%s]\n", name))
+		for key, value := range section {
+			build.WriteString(fmt.Sprintf("%s = %s\n", key, value))
+		}
+		build.WriteString("\n")
+	}
+
+	return []byte(build.String())
+}

pkg/server/controller/utils.go

@@ -1,6 +1,8 @@
 package controller
 
 import (
+	"github.com/fatedier/frp/pkg/config"
+	"github.com/vaughan0/go-ini"
 	"strings"
 )
 
@@ -21,6 +23,33 @@ func stringContains(element string, data []string) bool {
 	return false
 }
 
-func (c *HandleController) reloadFrpc() error {
-	return nil
+func (c *HandleController) parseConfigure(content, proxyType string) (interface{}, error) {
+	currentProxies := make(map[string]ini.Section)
+	clientProxies = make(map[string]ini.Section)
+	common, err := config.UnmarshalClientConfFromIni(content)
+	if err != nil {
+		return nil, err
+	}
+	cfg, err := ini.Load(strings.NewReader(content))
+	if err != nil {
+		return nil, err
+	}
+
+	for name, section := range cfg {
+		if name == "common" {
+			clientCommon = section
+			continue
+		}
+		if strings.ToLower(section["type"]) == strings.ToLower(proxyType) {
+			currentProxies[name] = section
+		}
+		clientProxies[name] = section
+		delete(clientProxies[name], "name")
+	}
+
+	if proxyType == "none" {
+		return common, nil
+	}
+
+	return currentProxies, nil
 }

pkg/server/controller/variables.go

@@ -1,9 +1,7 @@
 package controller
 
 import (
-	"github.com/fatedier/frp/pkg/config"
-	"github.com/fatedier/frp/pkg/consts"
-	"reflect"
+	"github.com/vaughan0/go-ini"
 )
 
 const (
@@ -11,6 +9,8 @@ const (
 	ParamError
 	SaveError
 	FrpServerError
+	ProxyExist
+	ProxyNotExist
 )
 
 const (
@@ -29,19 +29,13 @@ const (
 )
 
 var (
-	proxyConfTypeMap map[string]reflect.Type
+	clientCommon  ini.Section
+	clientProxies map[string]ini.Section
 )
 
 func init() {
-	proxyConfTypeMap = make(map[string]reflect.Type)
-	proxyConfTypeMap[consts.TCPProxy] = reflect.TypeOf(config.TCPProxyConf{})
-	proxyConfTypeMap[consts.TCPMuxProxy] = reflect.TypeOf(config.TCPMuxProxyConf{})
-	proxyConfTypeMap[consts.UDPProxy] = reflect.TypeOf(config.UDPProxyConf{})
-	proxyConfTypeMap[consts.HTTPProxy] = reflect.TypeOf(config.HTTPProxyConf{})
-	proxyConfTypeMap[consts.HTTPSProxy] = reflect.TypeOf(config.HTTPSProxyConf{})
-	proxyConfTypeMap[consts.STCPProxy] = reflect.TypeOf(config.STCPProxyConf{})
-	proxyConfTypeMap[consts.XTCPProxy] = reflect.TypeOf(config.XTCPProxyConf{})
-	proxyConfTypeMap[consts.SUDPProxy] = reflect.TypeOf(config.SUDPProxyConf{})
+	clientCommon = ini.Section{}
+	clientProxies = make(map[string]ini.Section)
 }
 
 type HTTPError struct {
@@ -80,6 +74,10 @@ type ProxyResponse struct {
 	Data any `json:"data"`
 }
 
+type ClientProxies struct {
+	Proxy ini.Section `json:"proxy"`
+}
+
 func (e *HTTPError) Error() string {
 	return e.Err.Error()
 }