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"""
HttpError Spider Middleware
See documentation in docs/topics/spider-middleware.rst
"""
from scrapy.exceptions import IgnoreRequest
class HttpError(IgnoreRequest):
"""A non-200 response was filtered"""
def __init__(self, response, *args, **kwargs):
self.response = response
super(HttpError, self).__init__(*args, **kwargs)
class HttpErrorMiddleware(object):
def process_spider_input(self, response, spider):
if 200 <= response.status < 300: # common case
return
meta = response.request.meta
if 'handle_httpstatus_all' in meta:
return
if 'handle_httpstatus_list' in meta:
allowed_statuses = meta['handle_httpstatus_list']
else:
allowed_statuses = getattr(spider, 'handle_httpstatus_list', ())
if response.status in allowed_statuses:
return
raise HttpError(response, 'Ignoring non-200 response')
def process_spider_exception(self, response, exception, spider):
if isinstance(exception, HttpError):
return []
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