wutta/wuttaweb
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fix: workaround error when 'fanstatic.needed' missing from environ

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what i've seen in the wild seems to be caused by a crawler trying to
fetch non-minified JS files, when the fanstatic resource library only
includes minified JS files.  still not sure why that would cause the
specific error but oh well, this hopefully "solves" for now
This commit is contained in:
Lance Edgar 2025-12-13 20:37:53 -06:00
parent c667f1ab7e
commit 75b8de7ce3
2 changed files with 26 additions and 4 deletions
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8
src/wuttaweb/handler.py
View file

@ -70,8 +70,16 @@ class WebHandler(GenericHandler):
url = self.config.get("wuttaweb.favicon_url") url = self.config.get("wuttaweb.favicon_url")
if url: if url:
return url return url
# nb. in rare circumstances i have received unhandled error email,
# which somehow was triggered by 'fanstatic.needed' being missing
# from the environ. not sure why that would happen, but it seems
# safe to ignore when it does - favicon is not *that* important.
if "fanstatic.needed" in request.environ:
return self.get_fanstatic_url(request, static.favicon) return self.get_fanstatic_url(request, static.favicon)
return ""
def get_header_logo_url(self, request): def get_header_logo_url(self, request):
""" """
Returns the canonical app header image URL. Returns the canonical app header image URL.

16
tests/test_handler.py
View file

@ -34,10 +34,18 @@ class TestWebHandler(WebTestCase):
self.assertEqual(url, "/fanstatic/wuttaweb_img/logo.png") self.assertEqual(url, "/fanstatic/wuttaweb_img/logo.png")
# what about a subpath # what about a subpath
self.request.script_name = "/testing" with patch.object(self.request, "script_name", new="/testing"):
url = handler.get_fanstatic_url(self.request, static.logo) url = handler.get_fanstatic_url(self.request, static.logo)
self.assertEqual(url, "/testing/fanstatic/wuttaweb_img/logo.png") self.assertEqual(url, "/testing/fanstatic/wuttaweb_img/logo.png")
# error if environ missing config/data
environ = dict(self.request.environ)
del environ["fanstatic.needed"]
with patch.object(self.request, "environ", new=environ):
self.assertRaises(
KeyError, handler.get_fanstatic_url, self.request, static.logo
)
def test_get_favicon_url(self): def test_get_favicon_url(self):
handler = self.make_handler() handler = self.make_handler()
@ -45,6 +53,12 @@ class TestWebHandler(WebTestCase):
url = handler.get_favicon_url(self.request) url = handler.get_favicon_url(self.request)
self.assertEqual(url, "/fanstatic/wuttaweb_img/favicon.ico") self.assertEqual(url, "/fanstatic/wuttaweb_img/favicon.ico")
# returns empty if environ missing config/data
environ = dict(self.request.environ)
del environ["fanstatic.needed"]
with patch.object(self.request, "environ", new=environ):
self.assertEqual(handler.get_favicon_url(self.request), "")
# config override # config override
self.config.setdefault("wuttaweb.favicon_url", "/testing/other.ico") self.config.setdefault("wuttaweb.favicon_url", "/testing/other.ico")
url = handler.get_favicon_url(self.request) url = handler.get_favicon_url(self.request)