Update cipher.py

Fix sigfunc name extraction; based on ytdl-org/youtube-dl@e450f6c
H4KKR · Jul 28, 2020 · f35b948 · f35b948
1 parent d8d96e3
commit f35b948
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/pytube/cipher.py b/pytube/cipher.py
@@ -101,7 +101,7 @@ def get_initial_function_name(js: str) -> str:
     function_patterns = [
         r"\b[cs]\s*&&\s*[adf]\.set\([^,]+\s*,\s*encodeURIComponent\s*\(\s*(?P<sig>[a-zA-Z0-9$]+)\(",  # noqa: E501
         r"\b[a-zA-Z0-9]+\s*&&\s*[a-zA-Z0-9]+\.set\([^,]+\s*,\s*encodeURIComponent\s*\(\s*(?P<sig>[a-zA-Z0-9$]+)\(",  # noqa: E501
-        r'\b(?P<sig>[a-zA-Z0-9$]{2})\s*=\s*function\(\s*a\s*\)\s*{\s*a\s*=\s*a\.split\(\s*""\s*\)',  # noqa: E501
+        r'(?:\b|[^a-zA-Z0-9$])(?P<sig>[a-zA-Z0-9$]{2})\s*=\s*function\(\s*a\s*\)\s*{\s*a\s*=\s*a\.split\(\s*""\s*\)',  # noqa: E501
         r'(?P<sig>[a-zA-Z0-9$]+)\s*=\s*function\(\s*a\s*\)\s*{\s*a\s*=\s*a\.split\(\s*""\s*\)',  # noqa: E501
         r'(["\'])signature\1\s*,\s*(?P<sig>[a-zA-Z0-9$]+)\(',
         r"\.sig\|\|(?P<sig>[a-zA-Z0-9$]+)\(",