Update app.py

app.py

@@ -88,7 +88,10 @@ def process_input(file, github_url, ssh_private_key, gemini_api_key):
     if file is not None:
         file_content = {file.name: file.read().decode('utf-8')}
     elif github_url and ssh_private_key:
-        # ... (GitHub URL handling)
+        if not re.match(r'^git@github\.com:.+/.+\.git$', github_url):
+            return "Error: Invalid GitHub SSH URL. Please use the format: git@github.com:username/repository.git"
+        if not ssh_private_key.strip():
+            return "Error: SSH Private Key is empty. Please provide a valid key."
         file_content = fetch_github_file(github_url, ssh_private_key)
         if isinstance(file_content, str) and file_content.startswith("Error:"):
             return file_content