feat: add email sender

Signed-off-by: Kininaru <shiftregister233@outlook.com>

update go mod sum

Signed-off-by: Kininaru <shiftregister233@outlook.com>

conf/app.conf

@@ -8,4 +8,8 @@ dataSourceName = root:123@tcp(localhost:3306)/
 dbName = casdoor
 AuthState = "casdoor"
 UseProxy = false
-EnableDocs = true
+EnableDocs = true
+mailUser = ""
+mailPass = ""
+mailHost = ""
+mailPort = ""

go.mod

@@ -11,6 +11,7 @@ require (
 	github.com/casbin/xorm-adapter/v2 v2.2.0
 	github.com/dchest/captcha v0.0.0-20200903113550-03f5f0333e1f
 	github.com/dgrijalva/jwt-go v3.2.0+incompatible
+	github.com/go-gomail/gomail v0.0.0-20160411212932-81ebce5c23df
 	github.com/go-sql-driver/mysql v1.5.0
 	github.com/google/uuid v1.2.0
 	github.com/jinzhu/configor v1.2.1 // indirect

go.sum

@@ -59,6 +59,8 @@ github.com/elazarl/go-bindata-assetfs v1.0.0/go.mod h1:v+YaWX3bdea5J/mo8dSETolEo
 github.com/fsnotify/fsnotify v1.4.7 h1:IXs+QLmnXW2CcXuY+8Mzv/fWEsPGWxqefPtCP5CnV9I=
 github.com/fsnotify/fsnotify v1.4.7/go.mod h1:jwhsz4b93w/PPRr/qN1Yymfu8t87LnFCMoQvtojpjFo=
 github.com/glendc/gopher-json v0.0.0-20170414221815-dc4743023d0c/go.mod h1:Gja1A+xZ9BoviGJNA2E9vFkPjjsl+CoJxSXiQM1UXtw=
+github.com/go-gomail/gomail v0.0.0-20160411212932-81ebce5c23df h1:Bao6dhmbTA1KFVxmJ6nBoMuOJit2yjEgLJpIMYpop0E=
+github.com/go-gomail/gomail v0.0.0-20160411212932-81ebce5c23df/go.mod h1:GJr+FCSXshIwgHBtLglIg9M2l2kQSi6QjVAngtzI08Y=
 github.com/go-kit/kit v0.8.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 github.com/go-kit/kit v0.9.0/go.mod h1:xBxKIO96dXMWWy0MnWVtmwkA9/13aqxPnvrjFYMA2as=
 github.com/go-logfmt/logfmt v0.3.0/go.mod h1:Qt1PoO58o5twSAckw1HlFXLmHsOX5/0LbT9GBnD5lWE=

object/email.go

@@ -0,0 +1,50 @@
+// Copyright 2021 The casbin Authors. All Rights Reserved.
+//
+// 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.
+
+// modified from https://github.com/casbin/casnode/blob/master/service/mail.go
+
+package object
+
+import (
+	"strconv"
+
+	"github.com/astaxie/beego"
+	"github.com/go-gomail/gomail"
+)
+
+var dialer *gomail.Dialer
+
+var mailConn = map[string]string{
+	"user": beego.AppConfig.String("mailUser"),
+	"pass": beego.AppConfig.String("mailPass"),
+	"host": beego.AppConfig.String("mailHost"),
+	"port": beego.AppConfig.String("mailPort"),
+}
+
+func InitDialer() {
+	port, _ := strconv.Atoi(mailConn["port"])
+	dialer = gomail.NewDialer(mailConn["host"], port, mailConn["user"], mailConn["pass"])
+}
+
+func SendEmail(title, content, dest, sender string) error {
+	message := gomail.NewMessage()
+	message.SetAddressHeader("From", beego.AppConfig.String("mailUser"), sender)
+	message.SetHeader("To", dest)
+	message.SetHeader("Subject", title)
+	message.SetBody("text/html", content)
+	if dialer == nil {
+		InitDialer()
+	}
+	return dialer.DialAndSend(message)
+}