refactor: separate backend domains and storage adapters

internal/server/middleware/email.go

@@ -0,0 +1,48 @@
+package middleware
+
+import (
+	"bytes"
+	"encoding/json"
+	"fmt"
+	"log/slog"
+	"strings"
+	"time"
+
+	"kra/internal/server/httpx"
+	"kra/internal/service"
+
+	"github.com/gin-gonic/gin"
+)
+
+func EmailErrorAlert(service *service.EmailService, logger *slog.Logger) gin.HandlerFunc {
+	return func(c *gin.Context) {
+		if strings.Contains(c.Request.URL.Path, "/email/") {
+			c.Next()
+			return
+		}
+		writer := &captureWriter{ResponseWriter: c.Writer}
+		c.Writer = writer
+		started := time.Now()
+		c.Next()
+		failed := c.Writer.Status() >= 400
+		if !failed {
+			var result struct {
+				Code int `json:"code"`
+			}
+			failed = json.Unmarshal(writer.body.Bytes(), &result) == nil && result.Code != httpx.CodeSuccess
+		}
+		if !failed {
+			return
+		}
+		username := "Unknown"
+		if claims := Claims(c); claims != nil && claims.Username != "" {
+			username = claims.Username
+		}
+		subject := fmt.Sprintf("%s %s 调用 %s 报错", username, c.ClientIP(), c.Request.URL.Path)
+		body := bytes.NewBuffer(nil)
+		fmt.Fprintf(body, "请求方式：%s<br>请求路径：%s<br>状态码：%d<br>耗时：%s<br>错误响应：<pre>%s</pre>", c.Request.Method, c.Request.URL.Path, c.Writer.Status(), time.Since(started), redactJSON(writer.body.Bytes()))
+		if err := service.Alert(c.Request.Context(), subject, body.String()); err != nil && logger != nil {
+			logger.Error("send HTTP error email", "error", err)
+		}
+	}
+}