From cff05f46dfa6a6b3bdcd249cecd007c7e14258e8 Mon Sep 17 00:00:00 2001
From: Kristjan Komlosi <kristjan@piskot.si>
Date: Sat, 7 Feb 2026 23:34:26 +0100
Subject: [PATCH] CORS frontend hotfix

---
 cmd/server/main.go          |  1 +
 internal/middleware/cors.go | 30 ++++++++++++++++++++++++++++++
 2 files changed, 31 insertions(+)
 create mode 100644 internal/middleware/cors.go

diff --git a/cmd/server/main.go b/cmd/server/main.go
index 7b9aefe..2af3417 100644
--- a/cmd/server/main.go
+++ b/cmd/server/main.go
@@ -114,6 +114,7 @@ func main() {
 	// Gin setup
 	r := gin.New()
 	r.Use(gin.Recovery())
+	r.Use(middleware.CORS())
 	r.Use(middleware.GinLogger())
 
 	// Public routes
diff --git a/internal/middleware/cors.go b/internal/middleware/cors.go
new file mode 100644
index 0000000..481b67b
--- /dev/null
+++ b/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()
+	}
+}