Override BaseFCGIServer.error to use Django error handling.

fastcgi.py

# 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 we 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 can figure this junk out, but you probably want more valid headers.
    # 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