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import unittest
from scrapy.contrib.downloadermiddleware.ajaxcrawl import AjaxCrawlMiddleware
from scrapy.spider import Spider
from scrapy.http import Request, HtmlResponse, Response
from scrapy.utils.test import get_crawler
__doctests__ = ['scrapy.contrib.downloadermiddleware.ajaxcrawl']
class AjaxCrawlMiddlewareTest(unittest.TestCase):
def setUp(self):
self.spider = Spider('foo')
crawler = get_crawler({'AJAXCRAWL_ENABLED': True})
self.mw = AjaxCrawlMiddleware.from_crawler(crawler)
def _ajaxcrawlable_body(self):
return '<html><head><meta name="fragment" content="!"/></head><body></body></html>'
def _req_resp(self, url, req_kwargs=None, resp_kwargs=None):
req = Request(url, **(req_kwargs or {}))
resp = HtmlResponse(url, request=req, **(resp_kwargs or {}))
return req, resp
def test_non_get(self):
req, resp = self._req_resp('http://example.com/', {'method': 'HEAD'})
resp2 = self.mw.process_response(req, resp, self.spider)
self.assertEqual(resp, resp2)
def test_binary_response(self):
req = Request('http://example.com/')
resp = Response('http://example.com/', body=b'foobar\x00\x01\x02', request=req)
resp2 = self.mw.process_response(req, resp, self.spider)
self.assertIs(resp, resp2)
def test_ajaxcrawl(self):
req, resp = self._req_resp(
'http://example.com/',
{'meta': {'foo': 'bar'}},
{'body': self._ajaxcrawlable_body()}
)
req2 = self.mw.process_response(req, resp, self.spider)
self.assertEqual(req2.url, 'http://example.com/?_escaped_fragment_=')
self.assertEqual(req2.meta['foo'], 'bar')
def test_ajaxcrawl_loop(self):
req, resp = self._req_resp('http://example.com/', {}, {'body': self._ajaxcrawlable_body()})
req2 = self.mw.process_response(req, resp, self.spider)
resp2 = HtmlResponse(req2.url, body=resp.body, request=req2)
resp3 = self.mw.process_response(req2, resp2, self.spider)
assert isinstance(resp3, HtmlResponse), (resp3.__class__, resp3)
self.assertEqual(resp3.request.url, 'http://example.com/?_escaped_fragment_=')
assert resp3 is resp2
def test_noncrawlable_body(self):
req, resp = self._req_resp('http://example.com/', {}, {'body': '<html></html>'})
resp2 = self.mw.process_response(req, resp, self.spider)
self.assertIs(resp, resp2)
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