What version of Djblets are you using?
1.0.6
Which module(s) have the problem?
djblets/extensions/extension.py
What steps will reproduce the problem?

Install Review Board using pip
Install reviewbot-extension using pip
Try to access Review Board


What is the expected output? What do you see instead?
I expect Djblets to be able to parse the UTF-8 encoded METADATA file of reviewbot-extension
What version of Python and Django?
2.7.12
Please provide any additional information below.
Djblets is reading all lines in reviewbot_extension-1.0.1.dist-info/METADATA and then tries to join them (djblets/extensions/extension.py line 439). This throws the following exception:

Environment:


Request Method: GET
Request URL: https://xxxxx.com/

Django Version: 1.6.11
Python Version: 2.7.12
Installed Applications:
[u'corsheaders',
 u'django.contrib.admin',
 u'django.contrib.auth',
 u'django.contrib.contenttypes',
 u'django.contrib.sites',
 u'django.contrib.sessions',
 u'django.contrib.staticfiles',
 u'djblets',
 u'djblets.avatars',
 u'djblets.configforms',
 u'djblets.datagrid',
 u'djblets.extensions',
 u'djblets.features',
 u'djblets.feedview',
 u'djblets.forms',
 u'djblets.gravatars',
 u'djblets.integrations',
 u'djblets.log',
 u'djblets.pipeline',
 u'djblets.recaptcha',
 u'djblets.siteconfig',
 u'djblets.util',
 u'haystack',
 u'oauth2_provider',
 u'pipeline',
 u'reviewboard',
 u'reviewboard.accounts',
 u'reviewboard.admin',
 u'reviewboard.attachments',
 u'reviewboard.avatars',
 u'reviewboard.changedescs',
 u'reviewboard.diffviewer',
 u'reviewboard.extensions',
 u'reviewboard.hostingsvcs',
 u'reviewboard.integrations',
 u'reviewboard.notifications',
 u'reviewboard.oauth',
 u'reviewboard.reviews',
 u'reviewboard.scmtools',
 u'reviewboard.site',
 u'reviewboard.webapi',
 u'django_evolution']
Installed Middleware:
[u'django.middleware.gzip.GZipMiddleware',
 u'reviewboard.admin.middleware.InitReviewBoardMiddleware',
 u'corsheaders.middleware.CorsMiddleware',
 u'django.middleware.clickjacking.XFrameOptionsMiddleware',
 u'django.middleware.common.CommonMiddleware',
 u'django.middleware.http.ConditionalGetMiddleware',
 u'django.middleware.locale.LocaleMiddleware',
 u'django.contrib.sessions.middleware.SessionMiddleware',
 u'django.contrib.auth.middleware.AuthenticationMiddleware',
 u'django.contrib.messages.middleware.MessageMiddleware',
 u'djblets.siteconfig.middleware.SettingsMiddleware',
 u'reviewboard.admin.middleware.LoadSettingsMiddleware',
 u'djblets.extensions.middleware.ExtensionsMiddleware',
 u'djblets.integrations.middleware.IntegrationsMiddleware',
 u'djblets.log.middleware.LoggingMiddleware',
 u'reviewboard.accounts.middleware.TimezoneMiddleware',
 u'reviewboard.admin.middleware.CheckUpdatesRequiredMiddleware',
 u'reviewboard.admin.middleware.X509AuthMiddleware',
 u'reviewboard.site.middleware.LocalSiteMiddleware',
 u'djblets.extensions.middleware.ExtensionsMiddlewareRunner',
 u'reviewboard.admin.middleware.ExtraExceptionInfoMiddleware']


Traceback:
File "/usr/local/lib/python2.7/dist-packages/django/core/handlers/base.py" in get_response
  88.                 response = middleware_method(request)
File "/usr/local/lib/python2.7/dist-packages/djblets/extensions/middleware.py" in process_request
  45.             self._check_expired()
File "/usr/local/lib/python2.7/dist-packages/djblets/extensions/middleware.py" in _check_expired
  76.                         extension_manager.load(full_reload=True)
File "/usr/local/lib/python2.7/dist-packages/djblets/extensions/manager.py" in load
  655.             self._load_extensions(full_reload)
File "/usr/local/lib/python2.7/dist-packages/djblets/extensions/manager.py" in _load_extensions
  725.                     entrypoint, ext_class)
File "/usr/local/lib/python2.7/dist-packages/djblets/extensions/extension.py" in create_from_entrypoint
  399.         metadata = cls._get_metadata_from_entrypoint(entrypoint, ext_class.id)
File "/usr/local/lib/python2.7/dist-packages/djblets/extensions/extension.py" in _get_metadata_from_entrypoint
  439.         data = '\n'.join(lines)

Exception Type: UnicodeDecodeError at /
Exception Value: 'ascii' codec can't decode byte 0xe2 in position 0: ordinal not in range(128)


This can be hotfixed by converting METADATA to ASCII.