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from unittest import TestCase
from twisted.trial.unittest import TestCase as TrialTestCase
from twisted.internet import defer
from scrapy.utils.test import docrawl, get_testlog
from scrapy.tests.mockserver import MockServer
from scrapy.http import Response, Request
from scrapy.spider import Spider
from scrapy.contrib.spidermiddleware.httperror import HttpErrorMiddleware, HttpError
from scrapy.settings import Settings
class _HttpErrorSpider(Spider):
name = 'httperror'
start_urls = [
"http://localhost:8998/status?n=200",
"http://localhost:8998/status?n=404",
"http://localhost:8998/status?n=402",
"http://localhost:8998/status?n=500",
]
bypass_status_codes = set()
def __init__(self, *args, **kwargs):
super(_HttpErrorSpider, self).__init__(*args, **kwargs)
self.failed = set()
self.skipped = set()
self.parsed = set()
def start_requests(self):
for url in self.start_urls:
yield Request(url, self.parse, errback=self.on_error)
def parse(self, response):
self.parsed.add(response.url[-3:])
def on_error(self, failure):
if isinstance(failure.value, HttpError):
response = failure.value.response
if response.status in self.bypass_status_codes:
self.skipped.add(response.url[-3:])
return self.parse(response)
# it assumes there is a response attached to failure
self.failed.add(failure.value.response.url[-3:])
return failure
def _responses(request, status_codes):
responses = []
for code in status_codes:
response = Response(request.url, status=code)
response.request = request
responses.append(response)
return responses
class TestHttpErrorMiddleware(TestCase):
def setUp(self):
self.spider = Spider('foo')
self.mw = HttpErrorMiddleware(Settings({}))
self.req = Request('http://scrapytest.org')
self.res200, self.res404 = _responses(self.req, [200, 404])
def test_process_spider_input(self):
self.assertEquals(None,
self.mw.process_spider_input(self.res200, self.spider))
self.assertRaises(HttpError,
self.mw.process_spider_input, self.res404, self.spider)
def test_process_spider_exception(self):
self.assertEquals([],
self.mw.process_spider_exception(self.res404, \
HttpError(self.res404), self.spider))
self.assertEquals(None,
self.mw.process_spider_exception(self.res404, \
Exception(), self.spider))
def test_handle_httpstatus_list(self):
res = self.res404.copy()
res.request = Request('http://scrapytest.org',
meta={'handle_httpstatus_list': [404]})
self.assertEquals(None,
self.mw.process_spider_input(res, self.spider))
self.spider.handle_httpstatus_list = [404]
self.assertEquals(None,
self.mw.process_spider_input(self.res404, self.spider))
class TestHttpErrorMiddlewareSettings(TestCase):
"""Similar test, but with settings"""
def setUp(self):
self.spider = Spider('foo')
self.mw = HttpErrorMiddleware(Settings({'HTTPERROR_ALLOWED_CODES': (402,)}))
self.req = Request('http://scrapytest.org')
self.res200, self.res404, self.res402 = _responses(self.req, [200, 404, 402])
def test_process_spider_input(self):
self.assertEquals(None,
self.mw.process_spider_input(self.res200, self.spider))
self.assertRaises(HttpError,
self.mw.process_spider_input, self.res404, self.spider)
self.assertEquals(None,
self.mw.process_spider_input(self.res402, self.spider))
def test_meta_overrides_settings(self):
request = Request('http://scrapytest.org',
meta={'handle_httpstatus_list': [404]})
res404 = self.res404.copy()
res404.request = request
res402 = self.res402.copy()
res402.request = request
self.assertEquals(None,
self.mw.process_spider_input(res404, self.spider))
self.assertRaises(HttpError,
self.mw.process_spider_input, res402, self.spider)
def test_spider_override_settings(self):
self.spider.handle_httpstatus_list = [404]
self.assertEquals(None,
self.mw.process_spider_input(self.res404, self.spider))
self.assertRaises(HttpError,
self.mw.process_spider_input, self.res402, self.spider)
class TestHttpErrorMiddlewareHandleAll(TestCase):
def setUp(self):
self.spider = Spider('foo')
self.mw = HttpErrorMiddleware(Settings({'HTTPERROR_ALLOW_ALL': True}))
self.req = Request('http://scrapytest.org')
self.res200, self.res404, self.res402 = _responses(self.req, [200, 404, 402])
def test_process_spider_input(self):
self.assertEquals(None,
self.mw.process_spider_input(self.res200, self.spider))
self.assertEquals(None,
self.mw.process_spider_input(self.res404, self.spider))
def test_meta_overrides_settings(self):
request = Request('http://scrapytest.org',
meta={'handle_httpstatus_list': [404]})
res404 = self.res404.copy()
res404.request = request
res402 = self.res402.copy()
res402.request = request
self.assertEquals(None,
self.mw.process_spider_input(res404, self.spider))
self.assertRaises(HttpError,
self.mw.process_spider_input, res402, self.spider)
class TestHttpErrorMiddlewareIntegrational(TrialTestCase):
def setUp(self):
self.mockserver = MockServer()
self.mockserver.__enter__()
def tearDown(self):
self.mockserver.__exit__(None, None, None)
@defer.inlineCallbacks
def test_middleware_works(self):
spider = _HttpErrorSpider()
yield docrawl(spider)
assert not spider.skipped, spider.skipped
self.assertEqual(spider.parsed, {'200'})
self.assertEqual(spider.failed, {'404', '402', '500'})
@defer.inlineCallbacks
def test_logging(self):
spider = _HttpErrorSpider(bypass_status_codes={402})
yield docrawl(spider)
# print(get_testlog())
self.assertEqual(spider.parsed, {'200', '402'})
self.assertEqual(spider.skipped, {'402'})
self.assertEqual(spider.failed, {'404', '500'})
log = get_testlog()
self.assertIn('Ignoring response <404', log)
self.assertIn('Ignoring response <500', log)
self.assertNotIn('Ignoring response <200', log)
self.assertNotIn('Ignoring response <402', log)
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