init

internal/middleware/auth.go

@@ -0,0 +1,79 @@
+package middleware
+
+import (
+	"exam_registration/pkg/response"
+	"github.com/gin-gonic/gin"
+	"github.com/golang-jwt/jwt/v5"
+	"github.com/spf13/viper"
+	"net/http"
+	"strings"
+)
+
+type Claims struct {
+	UserID   uint64 `json:"user_id"`
+	Username string `json:"username"`
+	Role     string `json:"role"`
+	jwt.RegisteredClaims
+}
+
+func JWT() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		authHeader := c.GetHeader("Authorization")
+		if authHeader == "" {
+			response.Error(c, response.UNAUTHORIZED, "未授权")
+			c.Abort()
+			return
+		}
+
+		parts := strings.SplitN(authHeader, " ", 2)
+		if !(len(parts) == 2 && parts[0] == "Bearer") {
+			response.Error(c, response.UNAUTHORIZED, "请求头中 auth 格式有误")
+			c.Abort()
+			return
+		}
+
+		tokenString := parts[1]
+		token, err := jwt.ParseWithClaims(tokenString, &Claims{}, func(token *jwt.Token) (interface{}, error) {
+			return []byte(viper.GetString("jwt.secret")), nil
+		})
+
+		if err != nil || !token.Valid {
+			response.Error(c, response.UNAUTHORIZED, "token 无效或已过期")
+			c.Abort()
+			return
+		}
+
+		claims, ok := token.Claims.(*Claims)
+		if !ok {
+			response.Error(c, response.UNAUTHORIZED, "无法获取用户信息")
+			c.Abort()
+			return
+		}
+
+		c.Set("claims", claims)
+		c.Set("user_id", claims.UserID)
+		c.Set("username", claims.Username)
+		c.Next()
+	}
+}
+
+// Cors 跨域中间件
+func Cors() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		method := c.Request.Method
+		origin := c.Request.Header.Get("Origin")
+		
+		c.Header("Access-Control-Allow-Origin", origin)
+		c.Header("Access-Control-Allow-Methods", "POST, GET, OPTIONS, PUT, DELETE, UPDATE")
+		c.Header("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept, Authorization")
+		c.Header("Access-Control-Expose-Headers", "Content-Length, Access-Control-Allow-Origin, Access-Control-Allow-Headers, Cache-Control, Content-Language, Content-Type")
+		c.Header("Access-Control-Allow-Credentials", "true")
+
+		if method == "OPTIONS" {
+			c.AbortWithStatus(http.StatusNoContent)
+			return
+		}
+
+		c.Next()
+	}
+}