CORS frontend hotfix

internal/middleware/cors.go

@@ -0,0 +1,30 @@
+package middleware
+
+import (
+	"net/http"
+	"strings"
+
+	"github.com/gin-gonic/gin"
+)
+
+// CORS adds permissive demo CORS headers for any origin.
+func CORS() gin.HandlerFunc {
+	allowedMethods := "GET, POST, PUT, DELETE, OPTIONS"
+	allowedHeaders := "Authorization, Content-Type"
+
+	return func(c *gin.Context) {
+		if c.GetHeader("Origin") != "" {
+			headers := c.Writer.Header()
+			headers.Set("Access-Control-Allow-Origin", "*")
+			headers.Set("Access-Control-Allow-Methods", allowedMethods)
+			headers.Set("Access-Control-Allow-Headers", allowedHeaders)
+		}
+
+		if strings.EqualFold(c.Request.Method, http.MethodOptions) {
+			c.AbortWithStatus(http.StatusNoContent)
+			return
+		}
+
+		c.Next()
+	}
+}