500 error in unAPI view with Hathi bibliography lookup fails

[rlskoeser]

Maybe a sporadic error; when I tried the hathi bib record API url that had an error, it worked for me. Or possibly Hathi throttles those APIs as well, if someone hits them too much? This is possibly not a real-world error, the error email indicated a large number of strange cookies and several unAPI URLs were hit in succession, so likely this was triggered by something crawling the site.

Not sure the best way to handle; maybe catch the HathiItemNotFound and return a brief error message with a 503 Service Unavailable code?

Stack trace from the error email:

HathiItemNotFound at /unapi/
No exception message supplied

Traceback:  

File "/var/www/prosody/env/lib/python3.6/site-packages/django/core/handlers/exception.py" in inner
  41.             response = get_response(request)

File "/var/www/prosody/env/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
  187.                 response = self.process_exception_by_middleware(e, request)

File "/var/www/prosody/env/lib/python3.6/site-packages/django/core/handlers/base.py" in _get_response
  185.                 response = wrapped_callback(request, *callback_args, **callback_kwargs)

File "/var/www/prosody/env/lib/python3.6/site-packages/django/views/generic/base.py" in view
  68.             return self.dispatch(request, *args, **kwargs)

File "/var/www/prosody/env/lib/python3.6/site-packages/django/views/generic/base.py" in dispatch
  88.         return handler(request, *args, **kwargs)

File "/var/www/prosody/ppa/unapi/views.py" in get
  42.                 content=self.get_metadata(item_id, metadata_format),

File "/var/www/prosody/ppa/unapi/views.py" in get_metadata
  65.         return item.get_metadata(data_format)

File "/var/www/prosody/ppa/archive/models.py" in get_metadata
  588.                 bibdata = bib_api.record('htid', self.source_id)

File "/var/www/prosody/ppa/archive/hathi.py" in record
  81.         return self._get_record('full', id_type, id_value)

File "/var/www/prosody/ppa/archive/hathi.py" in _get_record
  64.                 raise HathiItemNotFound

Exception Type: HathiItemNotFound at /unapi/

Request information:
USER: AnonymousUser

GET:
id = 'hvd.hwssft'
format = 'marc'

POST: No POST data

FILES: No FILES data

[rlskoeser]

We likely don't need to fix this if revisit how we handle zotero integration to include ppa urls and add support for excerpts etc #404