add is link checker

src/security/is_link.hpp

@@ -0,0 +1,14 @@
+#pragma once
+
+#include <uuid/uuid.h>
+#include <regex>
+#include <string>
+
+namespace hack::security
+{
+  inline bool is_link(const std::string& s)
+  {
+    static const std::regex e("^(https?:\\/\\/)?([\\da-z\\.-]+)\\.([a-z\\.]{2,6})([\\/\\w \\.-]*)*\\/?$", std::regex_constants::icase);
+    return std::regex_match (s, e);
+  }
+}