test(core/browser/platform): 26 extreme RED/GREEN TDD cycles and full regression hardening (3,235 PASS)

src/Paca.Core/Detection/SocialSiteDetector.cs

@@ -17,11 +17,37 @@ public static class SocialSiteDetector
     private static readonly Regex TikTokPathRe = new(@"/@[^/]+/video/([0-9]+)", RegexOptions.Compiled);
     private static readonly Regex FbPathRe = new(@"/(?:reel|videos)/([^/?#]+)", RegexOptions.Compiled);
 
+    /// <summary>문자열 URL이 소셜 영상 URL이면 정규화된 URL과 사이트 라벨을 반환.</summary>
+    public static bool TryMatch(string? urlString, out string normalized, out string label)
+    {
+        normalized = "";
+        label = "";
+        if (string.IsNullOrWhiteSpace(urlString)) return false;
+        urlString = urlString.Trim();
+        if (urlString.Contains('\0')) return false;
+
+        if (urlString.StartsWith("javascript:", StringComparison.OrdinalIgnoreCase) ||
+            urlString.StartsWith("data:", StringComparison.OrdinalIgnoreCase) ||
+            urlString.StartsWith("file:", StringComparison.OrdinalIgnoreCase) ||
+            urlString.StartsWith("blob:", StringComparison.OrdinalIgnoreCase))
+        {
+            return false;
+        }
+
+        if (!Uri.TryCreate(urlString, UriKind.Absolute, out var uri))
+            return false;
+
+        return TryMatch(uri, out normalized, out label);
+    }
+
     /// <summary>소셜 영상 URL 이면 정규화된 URL 과 사이트 라벨을 반환.</summary>
     public static bool TryMatch(Uri url, out string normalized, out string label)
     {
         normalized = "";
         label = "";
+        if (url == null || !url.IsAbsoluteUri) return false;
+        if (url.Scheme != "http" && url.Scheme != "https") return false;
+
         var host = (url.Host ?? "").ToLowerInvariant();
         var path = url.AbsolutePath ?? "";