fix: github URL parsing for slash-based branches and multi-dot filenames

.changeset/fix-github-url-parsing.md

@@ -0,0 +1,9 @@
+---
+'@asyncapi/cli': patch
+---
+
+fix: github URL parsing for slash-based branches and multi-dot filenames
+
+- Update GitHub blob URL regex to support branch names with slashes (e.g., feature/new-validation)
+- Use path.extname() instead of split('.') for reliable file extension detection
+- Fixes issue #1940 where URLs with slash-based branch names failed to parse

src/domains/models/SpecificationFile.ts

@@ -237,7 +237,7 @@ export async function fileExists(name: string): Promise<boolean> {
       return true;
     }
 
-    const extension = name.split('.')[1];
+    const extension = path.extname(name).slice(1).toLowerCase();
 
     const allowedExtenstion = ['yml', 'yaml', 'json'];
 

src/domains/services/validation.service.ts

@@ -69,8 +69,9 @@ const convertGitHubWebUrl = (url: string): string => {
   const urlWithoutFragment = url.split('#')[0];
 
   // Handle GitHub web URLs like: https://github.com/owner/repo/blob/branch/path
+  // Updated to support branch names with slashes (e.g., feature/new-validation)
   // eslint-disable-next-line no-useless-escape
-  const githubWebPattern = /^https:\/\/github\.com\/([^\/]+)\/([^\/]+)\/blob\/([^\/]+)\/(.+)$/;
+  const githubWebPattern = /^https:\/\/github\.com\/([^\/]+)\/([^\/]+)\/blob\/(.+?)\/(.+)$/;
   const match = urlWithoutFragment.match(githubWebPattern);
 
   if (match) {