Integrated Fantastic coffie (decaffeinated) base version

cmd/webapi/cors.go

@@ -0,0 +1,19 @@
+package main
+
+import (
+	"github.com/gorilla/handlers"
+	"net/http"
+)
+
+// applyCORSHandler applies a CORS policy to the router. CORS stands for Cross-Origin Resource Sharing: it's a security
+// feature present in web browsers that blocks JavaScript requests going across different domains if not specified in a
+// policy. This function sends the policy of this API server.
+func applyCORSHandler(h http.Handler) http.Handler {
+	return handlers.CORS(
+		handlers.AllowedHeaders([]string{
+			"x-example-header",
+		}),
+		handlers.AllowedMethods([]string{"GET", "POST", "OPTIONS", "DELETE", "PUT"}),
+		handlers.AllowedOrigins([]string{"*"}),
+	)(h)
+}