feat: implement VPS/Domain expiry notifications and native SMTP support

model/config.go

@@ -42,7 +42,8 @@ type ConfigDashboard struct {
 	UserTemplate      string `koanf:"user_template" json:"user_template,omitempty"`
 	AdminTemplate     string `koanf:"admin_template" json:"admin_template,omitempty"`
 
-	EnablePlainIPInNotification bool `koanf:"enable_plain_ip_in_notification" json:"enable_plain_ip_in_notification,omitempty"` // 通知信息IP不打码
+	EnablePlainIPInNotification bool   `koanf:"enable_plain_ip_in_notification" json:"enable_plain_ip_in_notification,omitempty"` // 通知信息IP不打码
+	ExpiryNotificationGroupID   uint64 `koanf:"expiry_notification_group_id" json:"expiry_notification_group_id"`
 
 	// IP变更提醒
 	EnableIPChangeNotification  bool   `koanf:"enable_ip_change_notification" json:"enable_ip_change_notification,omitempty"`

model/notification.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"io"
 	"net/http"
+	"net/smtp"
 	"net/url"
 	"strings"
 	"time"
@@ -31,14 +32,21 @@ type NotificationServerBundle struct {
 	Loc          *time.Location
 }
 
+const (
+	_ = iota
+	NotificationTypeWebhook
+	NotificationTypeSMTP
+)
+
 type Notification struct {
 	Common
 	Name              string `json:"name"`
-	URL               string `json:"url"`
+	Type              uint8  `json:"type"` // 0: Webhook, 1: SMTP
+	URL               string `json:"url"`  // SMTP: host:port, Webhook: url
 	RequestMethod     uint8  `json:"request_method"`
 	RequestType       uint8  `json:"request_type"`
-	RequestHeader     string `json:"request_header" gorm:"type:longtext"`
-	RequestBody       string `json:"request_body" gorm:"type:longtext"`
+	RequestHeader     string `json:"request_header" gorm:"type:longtext"` // SMTP: user, Webhook: header
+	RequestBody       string `json:"request_body" gorm:"type:longtext"`   // SMTP: pass, Webhook: body
 	VerifyTLS         *bool  `json:"verify_tls,omitempty"`
 	FormatMetricUnits *bool  `json:"format_metric_units,omitempty"`
 }
@@ -111,8 +119,12 @@ func (n *Notification) setRequestHeader(req *http.Request) error {
 }
 
 func (ns *NotificationServerBundle) Send(message string) error {
-	var client *http.Client
 	n := ns.Notification
+	if n.Type == NotificationTypeSMTP {
+		return ns.sendSMTP(message)
+	}
+
+	var client *http.Client
 	if n.VerifyTLS != nil && *n.VerifyTLS {
 		client = utils.HttpClient
 	} else {
@@ -158,6 +170,40 @@ func (ns *NotificationServerBundle) Send(message string) error {
 	return nil
 }
 
+func (ns *NotificationServerBundle) sendSMTP(message string) error {
+	n := ns.Notification
+	// RequestHeader: user:pass
+	// RequestBody: to_email
+	// URL: host:port
+	authInfo := strings.SplitN(n.RequestHeader, ":", 2)
+	if len(authInfo) < 2 {
+		return errors.New("SMTP认证信息格式错误 (user:pass)")
+	}
+	user := authInfo[0]
+	pass := authInfo[1]
+	to := n.RequestBody
+
+	hp := strings.SplitN(n.URL, ":", 2)
+	if len(hp) < 2 {
+		return errors.New("SMTP服务器地址格式错误 (host:port)")
+	}
+
+	auth := smtp.PlainAuth("", user, pass, hp[0])
+
+	subject := "Nezha Monitoring Alert"
+	if ns.Server != nil {
+		subject = fmt.Sprintf("Nezha Alert: %s", ns.Server.Name)
+	}
+
+	body := fmt.Sprintf("To: %s\r\nSubject: %s\r\n\r\n%s", to, subject, message)
+
+	err := smtp.SendMail(n.URL, auth, user, []string{to}, []byte(body))
+	if err != nil {
+		return err
+	}
+	return nil
+}
+
 // replaceParamInString 替换字符串中的占位符
 func (ns *NotificationServerBundle) replaceParamsInString(str string, message string, mod func(string) string) string {
 	if mod == nil {

model/server.go

@@ -6,6 +6,7 @@ import (
 	"time"
 
 	"github.com/goccy/go-json"
+	"gorm.io/datatypes"
 	"gorm.io/gorm"
 
 	pb "github.com/nezhahq/nezha/proto"
@@ -21,6 +22,7 @@ type Server struct {
 	DisplayIndex           int    `json:"display_index"`            // 展示排序，越大越靠前
 	HideForGuest           bool   `json:"hide_for_guest,omitempty"` // 对游客隐藏
 	EnableDDNS             bool   `json:"enable_ddns,omitempty"`    // 启用DDNS
+	BillingData            datatypes.JSON `gorm:"type:json" json:"billing_data,omitempty"`
 	DDNSProfilesRaw        string `gorm:"default:'[]';column:ddns_profiles_raw" json:"-"`
 	OverrideDDNSDomainsRaw string `gorm:"default:'{}';column:override_ddns_domains_raw" json:"-"`
 

model/setting_api.go

@@ -22,6 +22,7 @@ type SettingForm struct {
 	AgentTLS                    bool `json:"tls,omitempty" validate:"optional"`
 	EnableIPChangeNotification  bool `json:"enable_ip_change_notification,omitempty" validate:"optional"`
 	EnablePlainIPInNotification bool `json:"enable_plain_ip_in_notification,omitempty" validate:"optional"`
+	ExpiryNotificationGroupID   uint64 `json:"expiry_notification_group_id,omitempty" validate:"optional"`
 }
 
 type Setting struct {