fix: 유효한 URL을 판별하는 정규식 수정

- 기존의 정규식에 Catastrophic Backtracking 문제가 있어 특정케이스에서 연산이 끝나지 않는 경우가 발생했기 때문에 새로운 정규식으로 변경함

Author: choyoungwoo9

backend/src/project/dto/link/LinkCreateRequest.dto.ts

@@ -18,13 +18,21 @@ function IsURL() {
       validator: {
         validate(value: any) {
           const URLPattern = new RegExp(
-            '^(https?:\\/\\/)' +
-              '((([a-z\\d가-힣]([a-z\\d가-힣-]*[a-z\\d가-힣])*)\\.?)+[a-z가-힣]{2,}|' +
-              '((\\d{1,3}\\.){3}\\d{1,3}))' +
-              '(\\:\\d+)?' +
-              '(\\/[-a-z\\d%_.~+가-힣]*)*' +
-              '(\\?[;&a-z\\d%_.~+=-가-힣]*)?' +
-              '(\\#[-a-z\\d_가-힣]*)?$',
+            '^((?:http|https)://)' +
+              '(?:\\S+(?::\\S*)?@)?' +
+              '(?:(?:' +
+              '(?:[1-9]\\d?|1\\d\\d|2[01]\\d|22[0-3])' +
+              '(?:\\.(?:1?\\d{1,2}|2[0-4]\\d|25[0-5])){2}' +
+              '(?:\\.(?:[0-9]\\d?|1\\d\\d|2[0-4]\\d|25[0-4]))' +
+              '|' +
+              '(?:(?:[a-z\\u00a1-\\uffff0-9]+-?)*[a-z\\u00a1-\\uffff0-9]+)' +
+              '(?:\\.(?:[a-z\\u00a1-\\uffff0-9]+-?)*[a-z\\u00a1-\\uffff0-9]+)*' +
+              '(?:\\.(?:[a-z\\u00a1-\\uffff]{2,}))' +
+              ')|' +
+              'localhost' +
+              ')' +
+              '(?::\\d{2,5})?' +
+              '(?:(/|\\?|#)[^\\s]*)?$',
             'i',
           );
           return URLPattern.test(value);

frontend/src/utils/isValidURL.ts

@@ -1,12 +1,20 @@
 const isValidURL = (url: string) => {
   const pattern = new RegExp(
-    "^(https?:\\/\\/)?" + // 프로토콜
-      "((([a-z\\d가-힣]([a-z\\d가-힣-]*[a-z\\d가-힣])*)\\.?)+[a-z가-힣]{2,}|" + // 도메인명
-      "((\\d{1,3}\\.){3}\\d{1,3}))" + // OR IP (v4) 주소
-      "(\\:\\d+)?" + // 포트
-      "(\\/[-a-z\\d%_.~+가-힣]*)*" + // 경로
-      "(\\?[;&a-z\\d%_.~+=-가-힣]*)?" + // 쿼리 문자열
-      "(\\#[-a-z\\d_가-힣]*)?$",
+    "^((?:http|https)://)" +
+      "(?:\\S+(?::\\S*)?@)?" +
+      "(?:(?:" +
+      "(?:[1-9]\\d?|1\\d\\d|2[01]\\d|22[0-3])" +
+      "(?:\\.(?:1?\\d{1,2}|2[0-4]\\d|25[0-5])){2}" +
+      "(?:\\.(?:[0-9]\\d?|1\\d\\d|2[0-4]\\d|25[0-4]))" +
+      "|" +
+      "(?:(?:[a-z\\u00a1-\\uffff0-9]+-?)*[a-z\\u00a1-\\uffff0-9]+)" +
+      "(?:\\.(?:[a-z\\u00a1-\\uffff0-9]+-?)*[a-z\\u00a1-\\uffff0-9]+)*" +
+      "(?:\\.(?:[a-z\\u00a1-\\uffff]{2,}))" +
+      ")|" +
+      "localhost" +
+      ")" +
+      "(?::\\d{2,5})?" +
+      "(?:(/|\\?|#)[^\\s]*)?$",
     "i"
   );