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notifications: Correctly convert relative narrow links to absolute URLs.

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This commit is contained in:
Harshit Bansal
2017-10-11 20:41:19 +00:00
parent b0235bc458
commit 8d42f42ef2
2 changed files with 28 additions and 3 deletions
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23
zerver/lib/notifications.py
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@@ -71,9 +71,26 @@ def topic_narrow_url(realm, stream, topic):
def relative_to_full_url(base_url, content):
# type: (Text, Text) -> Text
# Convert relative URLs to absolute URLs.
elem = lxml.html.fromstring(content) # type: ignore # https://github.com/python/typeshed/issues/525
elem.make_links_absolute(base_url)
content = lxml.html.tostring(elem).decode("utf-8") # type: ignore # https://github.com/python/typeshed/issues/525
fragment = lxml.html.fromstring(content) # type: ignore # https://github.com/python/typeshed/issues/525
# We handle narrow URLs separately because of two reasons:
# 1: 'lxml' seems to be having an issue in dealing with URLs that begin
# `#` due to which it doesn't add a `/` before joining the base_url to
# the relative URL.
# 2: We also need to update the title attribute in the narrow links which
# is not possible with `make_links_absolute()`.
for link_info in fragment.iterlinks():
elem, attrib, link, pos = link_info
match = re.match("/?#narrow/", link)
if match is not None:
link = re.sub(r"^/?#narrow/", base_url + "/#narrow/", link)
elem.set(attrib, link)
# Only manually linked narrow URLs have title attribute set.
if elem.get('title') is not None:
elem.set('title', link)
fragment.make_links_absolute(base_url)
content = lxml.html.tostring(fragment).decode("utf-8") # type: ignore # https://github.com/python/typeshed/issues/525
# Inline images can't be displayed in the emails as the request
# from the mail server can't be authenticated because it has no