Initialize AutoLibrary website with Gitea deployment

backend/middlewares/casdoor_middleware/middleware.go

@@ -0,0 +1,92 @@
+package casdoor_middleware
+
+import (
+	"log"
+	"net/http"
+	"strings"
+
+	"autolibrary.top/webserver/config"
+
+	"github.com/casdoor/casdoor-go-sdk/casdoorsdk"
+	"github.com/gin-gonic/gin"
+)
+
+func CasdoorAuth() gin.HandlerFunc {
+	cfg := config.GetConfig()
+
+	return func(c *gin.Context) {
+		// If Casdoor is not configured, return 501 Not Implemented
+		if cfg.Backend.Casdoor.Endpoint == "" || cfg.Backend.Casdoor.ClientID == "" {
+			c.JSON(http.StatusNotImplemented, gin.H{
+				"code": http.StatusNotImplemented,
+				"msg":  "AUTH > Casdoor authentication is not configured on this server",
+				"data": nil,
+			})
+			c.Abort()
+			return
+		}
+
+		authHeader := c.GetHeader("Authorization")
+		if authHeader == "" {
+			c.JSON(http.StatusUnauthorized, gin.H{
+				"code": http.StatusUnauthorized,
+				"msg":  "AUTH > missing Authorization header",
+				"data": nil,
+			})
+			c.Abort()
+			return
+		}
+
+		token := strings.TrimPrefix(authHeader, "Bearer ")
+		if token == authHeader {
+			c.JSON(http.StatusUnauthorized, gin.H{
+				"code": http.StatusUnauthorized,
+				"msg":  "AUTH > Authorization header must be Bearer <token>",
+				"data": nil,
+			})
+			c.Abort()
+			return
+		}
+
+		claims, err := casdoorsdk.ParseJwtToken(token)
+		if err != nil {
+			log.Printf("[W] AUTH > invalid JWT token: %v", err)
+			c.JSON(http.StatusUnauthorized, gin.H{
+				"code": http.StatusUnauthorized,
+				"msg":  "AUTH > invalid or expired token",
+				"data": nil,
+			})
+			c.Abort()
+			return
+		}
+
+		c.Set("user_id", claims.User.Id)
+		c.Set("user_name", claims.User.Name)
+		c.Set("display_name", claims.User.DisplayName)
+		c.Set("is_admin", claims.User.IsAdmin)
+		c.Set("user_tag", claims.User.Tag)
+		c.Next()
+	}
+}
+
+// CasdoorAdminAuth requires both valid Casdoor JWT and admin privileges
+func CasdoorAdminAuth() gin.HandlerFunc {
+	auth := CasdoorAuth()
+	return func(c *gin.Context) {
+		auth(c)
+		if c.IsAborted() {
+			return
+		}
+		isAdmin, _ := c.Get("is_admin")
+		if isAdmin == nil || !isAdmin.(bool) {
+			c.JSON(http.StatusForbidden, gin.H{
+				"code": http.StatusForbidden,
+				"msg":  "AUTH > admin privileges required",
+				"data": nil,
+			})
+			c.Abort()
+			return
+		}
+		c.Next()
+	}
+}