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-rw-r--r--qutebrowser/utils/urlutils.py11
1 files changed, 10 insertions, 1 deletions
diff --git a/qutebrowser/utils/urlutils.py b/qutebrowser/utils/urlutils.py
index 045981680..002f10411 100644
--- a/qutebrowser/utils/urlutils.py
+++ b/qutebrowser/utils/urlutils.py
@@ -26,7 +26,7 @@ import ipaddress
import posixpath
import urllib.parse
import mimetypes
-from typing import Optional, Tuple, Union
+from typing import Optional, Tuple, Union, Iterable
from PyQt5.QtCore import QUrl
from PyQt5.QtNetwork import QHostInfo, QHostAddress, QNetworkProxy
@@ -619,3 +619,12 @@ def parse_javascript_url(url: QUrl) -> str:
raise Error("Resulted in empty JavaScript code")
return code
+
+
+def widened_hostnames(hostname: str) -> Iterable[str]:
+ """A generator for widening string hostnames.
+
+ Ex: a.c.foo -> [a.c.foo, c.foo, foo]"""
+ while hostname:
+ yield hostname
+ hostname = hostname.partition(".")[-1]