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lib/utils/input_utils.dart

@@ -11,3 +11,19 @@ bool validateEmail(String value) {
   RegExp regex = new RegExp(pattern);
   return regex.hasMatch(value);
 }
+
+/// Check out whether a given string is a valid URL or not
+bool validateUrl(String url) {
+  //Initial check
+  if (!url.startsWith("http://") && !url.startsWith("https://")) return false;
+
+  try {
+    final uri = Uri.parse(url);
+    return uri.hasScheme &&
+        uri.hasAuthority &&
+        uri.port != 0 &&
+        uri.path.length != 0;
+  } catch (e) {
+    return false;
+  }
+}