chore: 并入 iotlcm-admin-svr 历史到 admin-svr/（原提交 49818c6）

2026-11-02 13:27:59 +08:00
parent 976980a3f5 49818c6dbe
commit 193f7393c0
1250 changed files with 154111 additions and 0 deletions
@@ -0,0 +1,110 @@
+package utility
+
+import (
+	"context"
+	"crypto/tls"
+	"net"
+	"net/smtp"
+	"strings"
+	"time"
+
+	"github.com/gogf/gf/v2/errors/gerror"
+)
+
+const DefaultExternalRequestTimeout = 10 * time.Second
+
+func ExternalRequestTimeout(configured string) time.Duration {
+	timeout, err := time.ParseDuration(strings.TrimSpace(configured))
+	if err != nil || timeout <= 0 {
+		return DefaultExternalRequestTimeout
+	}
+	return timeout
+}
+
+type SMTPOptions struct {
+	Address string
+	Host    string
+	Auth    smtp.Auth
+	From    string
+	To      []string
+	Data    []byte
+	SSL     bool
+	Timeout time.Duration
+}
+
+func SendSMTP(ctx context.Context, options SMTPOptions) (err error) {
+	if ctx == nil {
+		ctx = context.Background()
+	}
+	timeout := options.Timeout
+	if timeout <= 0 {
+		timeout = DefaultExternalRequestTimeout
+	}
+	ctx, cancel := context.WithTimeout(ctx, timeout)
+	defer cancel()
+	defer func() {
+		if err != nil && ctx.Err() != nil {
+			err = gerror.Wrap(ctx.Err(), "SMTP request canceled or timed out")
+		}
+	}()
+	dialer := &net.Dialer{Timeout: timeout}
+	conn, err := dialer.DialContext(ctx, "tcp", options.Address)
+	if err != nil {
+		return gerror.Wrap(err, "connect SMTP server failed")
+	}
+	defer conn.Close()
+	stop := context.AfterFunc(ctx, func() {
+		_ = conn.Close()
+	})
+	defer stop()
+	deadline, _ := ctx.Deadline()
+	if err = conn.SetDeadline(deadline); err != nil {
+		return gerror.Wrap(err, "set SMTP deadline failed")
+	}
+	tlsConfig := &tls.Config{ServerName: options.Host, MinVersion: tls.VersionTLS12}
+	smtpConn := conn
+	if options.SSL {
+		tlsConn := tls.Client(conn, tlsConfig)
+		if err = tlsConn.HandshakeContext(ctx); err != nil {
+			return gerror.Wrap(err, "SMTP TLS handshake failed")
+		}
+		smtpConn = tlsConn
+	}
+	client, err := smtp.NewClient(smtpConn, options.Host)
+	if err != nil {
+		return gerror.Wrap(err, "read SMTP greeting failed")
+	}
+	defer client.Close()
+	if !options.SSL {
+		if available, _ := client.Extension("STARTTLS"); available {
+			if err = client.StartTLS(tlsConfig); err != nil {
+				return gerror.Wrap(err, "SMTP STARTTLS failed")
+			}
+		}
+	}
+	if options.Auth != nil {
+		if err = client.Auth(options.Auth); err != nil {
+			return gerror.Wrap(err, "SMTP authentication failed")
+		}
+	}
+	if err = client.Mail(options.From); err != nil {
+		return gerror.Wrap(err, "SMTP sender rejected")
+	}
+	for _, recipient := range options.To {
+		if err = client.Rcpt(recipient); err != nil {
+			return gerror.Wrap(err, "SMTP recipient rejected")
+		}
+	}
+	writer, err := client.Data()
+	if err != nil {
+		return gerror.Wrap(err, "start SMTP message failed")
+	}
+	if _, err = writer.Write(options.Data); err != nil {
+		_ = writer.Close()
+		return gerror.Wrap(err, "write SMTP message failed")
+	}
+	if err = writer.Close(); err != nil {
+		return gerror.Wrap(err, "SMTP message rejected")
+	}
+	return client.Quit()
+}