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    <p>I hit something similar - we've got Django behind NGINX, and we allow Django to handle 500s - this works 99.9% of the time, but when we're doing upgrades, sometimes these "Unhandled Exceptions" slip through.</p> <p>Django doesn't override flup's hooks for handling errors, so we'll need to do that ourselves, and let Django handle these errors.</p> <p>First override <a href="http://trac.saddi.com/flup/browser/flup/server/fcgi_base.py#L1210" rel="noreferrer"><code>flup.server.BaseFCGIServer.error</code></a> to errors through Django. Then we'll tell Django to use our modified <code>BaseFCGIServer</code> to see those errors.</p> <p>Since Python is awesome, we'll cheat and just monkeypatch the whole thing in one place, <a href="http://code.djangoproject.com/browser/django/trunk/django/core/servers/fastcgi.py" rel="noreferrer"><code>django.core.servers.fastcgi.py</code></a>. Here we go:</p> <pre><code># django.core.servers.fastcgi.py def runfastcgi(argset=[], **kwargs): # ... # Paste his hack right after the `module` try/catch. # Override BaseFCGIServer.error to use Django error handling. # http://trac.saddi.com/flup/browser/flup/server/fcgi_base.py#L1210 def patch_error(self, req): import sys from django.conf import settings from django.core import urlresolvers from django.core.handlers.wsgi import WSGIRequest urlconf = settings.ROOT_URLCONF urlresolvers.set_urlconf(urlconf) resolver = urlresolvers.RegexURLResolver(r'^/', urlconf) # No access to 'environ' so rebuild WSGIRequest. # http://trac.saddi.com/flup/browser/flup/server/fcgi_base.py#L1077 environ = req.params environ.update(self.environ) environ['wsgi.version'] = (1,0) environ['wsgi.input'] = req.stdin self._sanitizeEnv(environ) wsgireq = WSGIRequest(environ) # http://code.djangoproject.com/browser/django/trunk/django/core/handlers/base.py#L177 response = self.application.handle_uncaught_exception(wsgireq, resolver, sys.exc_info()) # TODO: NGINX figures this out, but other servers might not. # http://trac.saddi.com/flup/browser/flup/server/fcgi_base.py#L1104 req.stdout.write('Status: 500\r\n') req.stdout.write('Content-Type: text/html\r\n\r\n' + response.content) WSGIServer.error = patch_error </code></pre> <p>Now you can enjoy Django stack traces even for flup level errors!</p>
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    1. POUnhandled Exception in Flup
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    1. USjbox
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    1. COThats one awesome answer. Thanks jbox.
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    2. COI want to +++ this answer! Now I see all the info I need instead of just 'Unhandled Exception'.
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