error 500 on serveral webmention comment proxy pages

[diplix]

from https://www.brid.gy/log?start_time=1441784036&key=aglzfmJyaWQtZ3lyOAsSCFJlc3BvbnNlIip0YWc6aW5zdGFncmFtLmNvbSwyMDEzOjEwNzAwODMwNzc5Nzk3NzgwMjIM

to 500: https://brid-gy.appspot.com/comment/instagram/diplix/1069790872807418362_10947313/1070083077979778022

and: https://www.brid.gy/log?start_time=1441782105&key=aglzfmJyaWQtZ3lyOAsSCFJlc3BvbnNlIip0YWc6aW5zdGFncmFtLmNvbSwyMDEzOjEwNzAwNjI0ODE4NDE1OTY2ODAM

to 500 again: https://brid-gy.appspot.com/comment/instagram/diplix/1069790872807418362_10947313/1070062481841596680

may be it’s the emijos, in this comment, that are upsetting bridgy? the likes on that instagram are processed just fine, it’s the comments after one containing emijos: https://www.brid.gy/log?start_time=1441752023&key=aglzfmJyaWQtZ3lyOAsSCFJlc3BvbnNlIip0YWc6aW5zdGFncmFtLmNvbSwyMDEzOjEwNjk4MTQxOTI1MDg1MTIyNzMM

→ 500: https://brid-gy.appspot.com/comment/instagram/diplix/1069790872807418362_10947313/1069814192508512273

instagram original: https://instagram.com/p/7YqSF9pCn6/

[snarfed]

thanks for the report! and apologies for the continued breakages. i'll fix this soon.

[snarfed]

stack trace:

Traceback (most recent call last):
...
  File "/base/data/home/apps/s~brid-gy/4.387019326654903331/handlers.py", line 136, in get
    obj = self.get_item(*ids)
  File "/base/data/home/apps/s~brid-gy/4.387019326654903331/handlers.py", line 291, in get_item
    self.update_post_urls(post, cmt, 'inReplyTo', mentions=True)
  File "/base/data/home/apps/s~brid-gy/4.387019326654903331/handlers.py", line 229, in update_post_urls
    existing('attachments', 'mention'))))
  File "/base/data/home/apps/s~brid-gy/4.387019326654903331/handlers.py", line 226, in <genexpr>
    mentions = list(set(util.clean_webmention_url(u) for u in
  File "/base/data/home/apps/s~brid-gy/4.387019326654903331/util.py", line 230, in clean_webmention_url
    parts = list(urlparse.urlparse(url))
  File "/base/data/home/runtimes/python27/python27_dist/lib/python2.7/urlparse.py", line 142, in urlparse
    tuple = urlsplit(url, scheme, allow_fragments)
  File "/base/data/home/runtimes/python27/python27_dist/lib/python2.7/urlparse.py", line 181, in urlsplit
    i = url.find(':')
AttributeError: 'NoneType' object has no attribute 'find'