99 lines
2.7 KiB
Go
99 lines
2.7 KiB
Go
// Package middleware 存放 gin 中间件
|
||
package middleware
|
||
|
||
import (
|
||
"bytes"
|
||
"encoding/json"
|
||
"io"
|
||
"strconv"
|
||
|
||
"git.huangwc.com/pig/pig-farm-controller/internal/app/service/audit"
|
||
"github.com/gin-gonic/gin"
|
||
)
|
||
|
||
// --- 审计日志相关上下文键 ---
|
||
const (
|
||
ContextAuditActionType = "auditActionType"
|
||
ContextAuditTargetResource = "auditTargetResource"
|
||
ContextAuditDescription = "auditDescription"
|
||
)
|
||
|
||
// AuditLogMiddleware 创建一个Gin中间件，用于在请求结束后记录用户操作审计日志
|
||
func AuditLogMiddleware(auditService audit.Service) gin.HandlerFunc {
|
||
return func(c *gin.Context) {
|
||
// 使用自定义的 response body writer 来捕获响应体
|
||
blw := &bodyLogWriter{body: bytes.NewBufferString(""), ResponseWriter: c.Writer}
|
||
c.Writer = blw
|
||
|
||
// 首先执行请求链中的后续处理程序（即业务控制器）
|
||
c.Next()
|
||
|
||
// --- 在这里，请求已经处理完毕 ---
|
||
|
||
// 从上下文中尝试获取由控制器设置的业务审计信息
|
||
actionType, exists := c.Get(ContextAuditActionType)
|
||
if !exists {
|
||
// 如果上下文中没有 actionType，说明此接口无需记录审计日志，直接返回
|
||
return
|
||
}
|
||
|
||
// 获取其他审计信息
|
||
description, _ := c.Get(ContextAuditDescription)
|
||
targetResource, _ := c.Get(ContextAuditTargetResource)
|
||
|
||
// 判断操作状态
|
||
status := "success"
|
||
resultDetails := ""
|
||
if c.Writer.Status() >= 400 {
|
||
status = "failed"
|
||
// 尝试从捕获的响应体中解析错误信息
|
||
var errResp struct {
|
||
Error string `json:"error"`
|
||
}
|
||
if err := json.Unmarshal(blw.body.Bytes(), &errResp); err == nil {
|
||
resultDetails = errResp.Error
|
||
} else {
|
||
resultDetails = "HTTP Status: " + strconv.Itoa(c.Writer.Status())
|
||
}
|
||
}
|
||
|
||
// 调用审计服务记录日志（异步）
|
||
auditService.LogAction(
|
||
c,
|
||
actionType.(string),
|
||
description.(string),
|
||
targetResource,
|
||
status,
|
||
resultDetails,
|
||
)
|
||
}
|
||
}
|
||
|
||
// bodyLogWriter 是一个自定义的 gin.ResponseWriter，用于捕获响应体
|
||
// 这对于在操作失败时记录详细的错误信息非常有用
|
||
type bodyLogWriter struct {
|
||
gin.ResponseWriter
|
||
body *bytes.Buffer
|
||
}
|
||
|
||
func (w bodyLogWriter) Write(b []byte) (int, error) {
|
||
w.body.Write(b)
|
||
return w.ResponseWriter.Write(b)
|
||
}
|
||
|
||
func (w bodyLogWriter) WriteString(s string) (int, error) {
|
||
w.body.WriteString(s)
|
||
return w.ResponseWriter.WriteString(s)
|
||
}
|
||
|
||
// ReadBody 用于安全地读取请求体，并防止其被重复读取
|
||
func ReadBody(c *gin.Context) ([]byte, error) {
|
||
bodyBytes, err := io.ReadAll(c.Request.Body)
|
||
if err != nil {
|
||
return nil, err
|
||
}
|
||
// 将读取的内容放回 Body 中，以便后续的处理函数可以再次读取
|
||
c.Request.Body = io.NopCloser(bytes.NewBuffer(bodyBytes))
|
||
return bodyBytes, nil
|
||
}
|