uppdate

backend/middleware/cors.go

@@ -0,0 +1,63 @@
+package middleware
+
+import (
+	"net/http"
+	"os"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+)
+
+func CORSMiddleware() gin.HandlerFunc {
+	return func(c *gin.Context) {
+		allowedOrigins := os.Getenv("CORS_ALLOWED_ORIGINS")
+		ginMode := os.Getenv("GIN_MODE")
+
+		if allowedOrigins == "" {
+			if ginMode == "release" {
+				c.JSON(http.StatusForbidden, gin.H{
+					"error":   "CORS not configured for production",
+					"message": "Please set CORS_ALLOWED_ORIGINS environment variable",
+				})
+				c.Abort()
+				return
+			} else {
+				allowedOrigins = "http://localhost:5173,http://localhost:3000,http://localhost:8080"
+			}
+		}
+
+		origin := c.Request.Header.Get("Origin")
+		allowed := false
+
+		if allowedOrigins == "*" {
+			allowed = true
+		} else {
+			for _, allowedOrigin := range strings.Split(allowedOrigins, ",") {
+				if strings.TrimSpace(allowedOrigin) == origin {
+					allowed = true
+					break
+				}
+			}
+		}
+
+		if allowed {
+			if allowedOrigins == "*" {
+				c.Header("Access-Control-Allow-Origin", "*")
+			} else {
+				c.Header("Access-Control-Allow-Origin", origin)
+			}
+		}
+
+		c.Header("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS")
+		c.Header("Access-Control-Allow-Headers", "Content-Type, Authorization, X-Requested-With")
+		c.Header("Access-Control-Allow-Credentials", "true")
+		c.Header("Access-Control-Max-Age", "86400")
+
+		if c.Request.Method == "OPTIONS" {
+			c.AbortWithStatus(204)
+			return
+		}
+
+		c.Next()
+	}
+}