API: Add OPTIONS wildcard handler to serve CORS preflight requests #5133

Signed-off-by: Michael Mayer <michael@photoprism.app>

internal/api/options.go

@@ -0,0 +1,19 @@
+package api
+
+import (
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+)
+
+// Options returns an empty response to handle CORS preflight requests.
+//
+//	@Summary	returns CORS headers with an empty response body
+//	@Id			Options
+//	@Success	204
+//	@Router		/api/v1/{any} [options]
+func Options(router *gin.RouterGroup) {
+	router.OPTIONS("/*any", func(c *gin.Context) {
+		c.Status(http.StatusNoContent)
+	})
+}