Relax monitor URL validation

client/src/Validation/validation.js

@@ -128,26 +128,21 @@ const monitorValidation = joi.object({
 			.string()
 			.trim()
 			.custom((value, helpers) => {
-				// Regex from https://gist.github.com/dperini/729294
+				const noProtocol = value.replace(/^(https?:\/\/)/, "");
+
+				if (/^[a-zA-Z0-9-]+(:\d{1,5})?$/.test(noProtocol)) {
+					return value;
+				}
+
+				// Accept full domain/IP/URL (as fallback)
 				var urlRegex = new RegExp(
 					"^" +
-						// protocol identifier (optional)
-						// short syntax // still required
 						"(?:(?:https?|ftp):\\/\\/)?" +
-						// user:pass BasicAuth (optional)
 						"(?:" +
-						// IP address dotted notation octets
-						// excludes loopback network 0.0.0.0
-						// excludes reserved space >= 224.0.0.0
-						// excludes network & broadcast addresses
-						// (first & last IP address of each class)
 						"(?:[1-9]\\d?|1\\d\\d|2[01]\\d|22[0-3])" +
 						"(?:\\.(?:1?\\d{1,2}|2[0-4]\\d|25[0-5])){2}" +
 						"(?:\\.(?:[1-9]\\d?|1\\d\\d|2[0-4]\\d|25[0-4]))" +
 						"|" +
-						// host & domain names, may end with dot
-						// can be replaced by a shortest alternative
-						// (?![-_])(?:[-\\w\\u00a1-\\uffff]{0,63}[^-_]\\.)+
 						"(?:" +
 						"(?:" +
 						"[a-z0-9\\u00a1-\\uffff]" +
@@ -155,21 +150,19 @@ const monitorValidation = joi.object({
 						")?" +
 						"[a-z0-9\\u00a1-\\uffff]\\." +
 						")+" +
-						// TLD identifier name, may end with dot
 						"(?:[a-z\\u00a1-\\uffff]{2,}\\.?)" +
 						")" +
-						// port number (optional)
 						"(?::\\d{2,5})?" +
-						// resource path (optional)
 						"(?:[/?#]\\S*)?" +
 						"$",
 					"i"
 				);
-				if (!urlRegex.test(value)) {
-					return helpers.error("string.invalidUrl");
+
+				if (urlRegex.test(value)) {
+					return value;
 				}
 
-				return value;
+				return helpers.error("string.invalidUrl");
 			})
 			.messages({
 				"string.empty": "This field is required.",