Support send email with ssl

app/service/EmailService.go

@@ -1,6 +1,8 @@
 package service
 
 import (
+	"crypto/tls"
+	"net"
 	"bytes"
 	"fmt"
 	"github.com/leanote/leanote/app/db"
@@ -29,12 +31,74 @@ var host = ""
 var emailPort = ""
 var username = ""
 var password = ""
+var ssl = false
 
 func InitEmailFromDb() {
 	host = configService.GetGlobalStringConfig("emailHost")
 	emailPort = configService.GetGlobalStringConfig("emailPort")
 	username = configService.GetGlobalStringConfig("emailUsername")
 	password = configService.GetGlobalStringConfig("emailPassword")
+	if configService.GetGlobalStringConfig("emailSSL") == "1" {
+		ssl = true
+	}
+}
+
+//return a smtp client
+func dial(addr string) (*smtp.Client, error) {
+    conn, err := tls.Dial("tcp", addr, nil)
+    if err != nil {
+        LogW("Dialing Error:", err)
+        return nil, err
+    }
+    //分解主机端口字符串
+    host, _, _ := net.SplitHostPort(addr)
+    return smtp.NewClient(conn, host)
+}
+ 
+func SendEmailWithSSL (auth smtp.Auth, to []string, msg []byte) (err error) {
+    //create smtp client
+    c, err := dial(host + ":" + emailPort)
+    if err != nil {
+        LogW("Create smpt client error:", err)
+        return err
+    }
+    defer c.Close()
+
+    if auth != nil {
+        if ok, _ := c.Extension("AUTH"); ok {
+            if err = c.Auth(auth); err != nil {
+                LogW("Error during AUTH", err)
+                return err
+            }
+        }
+    }
+ 
+    if err = c.Mail(username); err != nil {
+        return err
+    }
+ 
+    for _, addr := range to {
+        if err = c.Rcpt(addr); err != nil {
+            return err
+        }
+    }
+ 
+    w, err := c.Data()
+    if err != nil {
+        return err
+    }
+ 
+    _, err = w.Write(msg)
+    if err != nil {
+        return err
+    }
+ 
+    err = w.Close()
+    if err != nil {
+        return err
+    }
+ 
+    return c.Quit()
 }
 
 func (this *EmailService) SendEmail(to, subject, body string) (ok bool, e string) {
@@ -57,7 +121,14 @@ func (this *EmailService) SendEmail(to, subject, body string) (ok bool, e string
 
 	msg := []byte("To: " + to + "\r\nFrom: " + username + "<" + username + ">\r\nSubject: " + subject + "\r\n" + content_type + "\r\n\r\n" + body)
 	send_to := strings.Split(to, ";")
-	err := smtp.SendMail(host+":"+emailPort, auth, username, send_to, msg)
+
+	var err error
+	if ssl {
+		err = SendEmailWithSSL(auth, send_to, msg)
+	} else {
+		Log("no ssl")
+		err = smtp.SendMail(host + ":" + emailPort, auth, username, send_to, msg)
+	}
 
 	if err != nil {
 		e = fmt.Sprint(err)