def handle_html(self, response):
htmlpage = htmlpage_from_response(response)
items, link_regions = self.extract_items(htmlpage)
for item in items:
yield item
for request in self._process_link_regions(htmlpage, link_regions):
yield request
def handle_html(self, response):
htmlpage = htmlpage_from_response(response)
items, link_regions = self.extract_items(htmlpage)
for item in items:
yield item
for request in self._process_link_regions(htmlpage, link_regions):
yield request
def test_start_urls(self):
specs = {
"type":
"pagination",
"value":
None,
"start_urls":
['http://www.spam.com/?p=1', 'http://www.eggs.com/?page=0']
}
lextractor = create_linkextractor_from_specs(specs)
html = """
<a href="http://www.spam.com/?p=100">Click here 1</a>
<a href="http://www.spam.com/?p=200">Click here 2</a>
<a href="http://www.spam.com/?p=300">Click here 3</a>
"""
html_page = htmlpage_from_response(
UTF8HtmlResponse(url='http://www.example.com/', body=html))
links = list(lextractor.links_to_follow(html_page))
links = sorted(links, key=lambda link: link.url)
self.assertEqual(len(links), 3)
self.assertEqual(links[0].url, "http://www.spam.com/?p=100")
self.assertEqual(links[1].url, "http://www.spam.com/?p=200")
self.assertEqual(links[2].url, "http://www.spam.com/?p=300")
self.assertEqual(links[0].text, 'Click here 1')
self.assertEqual(links[1].text, 'Click here 2')
self.assertEqual(links[2].text, 'Click here 3')
def _extract_links(self, response_or_htmlpage):
"""Extract links to follow from an html page
This uses `iterlinks` to read the links in the page.
"""
htmlpage = htmlpage_from_response(response_or_htmlpage) if \
isinstance(response_or_htmlpage, HtmlResponse) else response_or_htmlpage
return iterlinks(htmlpage)
def _extract_links(self, response_or_htmlpage):
"""Extract links to follow from an html page
This uses `iterlinks` to read the links in the page.
"""
if isinstance(response_or_htmlpage, HtmlResponse):
response_or_htmlpage = htmlpage_from_response(response_or_htmlpage)
return iterlinks(response_or_htmlpage)
def test_simple(self):
specs = {"type": "pagination", "value": None}
lextractor = create_linkextractor_from_specs(specs)
html_page = htmlpage_from_response(HtmlResponse(url="http://www.example.com/", body=html))
html_page.headers["n_items"] = 1
links = list(lextractor.links_to_follow(html_page))
self.assertEqual(len(links), 1)
self.assertEqual(links[0].url, "http://www.example.com/path")
self.assertEqual(links[0].text, "Click here")
def test_simple(self):
specs = {"type": "pagination", "value": None}
lextractor = create_linkextractor_from_specs(specs)
html_page = htmlpage_from_response(
HtmlResponse(url='http://www.example.com/', body=html))
html_page.headers['n_items'] = 1
links = list(lextractor.links_to_follow(html_page))
self.assertEqual(len(links), 1)
self.assertEqual(links[0].url, 'http://www.example.com/path')
self.assertEqual(links[0].text, 'Click here')
def handle_html(self, response, seen=None):
htmlpage = htmlpage_from_response(response)
items, link_regions = self.extract_items(htmlpage)
htmlpage.headers['n_items'] = len(items)
try:
response.meta['n_items'] = len(items)
except AttributeError:
pass # response not tied to any request
for item in items:
yield item
for request in self._process_link_regions(htmlpage, link_regions):
yield request
def handle_html(self, response, seen=None):
htmlpage = htmlpage_from_response(response)
items, link_regions = self.extract_items(htmlpage)
htmlpage.headers['n_items'] = len(items)
try:
response.meta['n_items'] = len(items)
except AttributeError:
pass # response not tied to any request
for item in items:
yield item
for request in self._process_link_regions(htmlpage, link_regions):
yield request
def parse(self, response):
self.crawled_all_pages += 1
# This condition is there because even if we stopped adding new requests, we might still have more requests
# done in total than the self.url_limits
# why? Because we stop when we reached sefl.urls_limit in terms of _crawled_ urls and not in terms of URLs
# added to the queue. This allows us to ensure we always crawl _at least_ self.urls_limit URLs but in return
# we will most likely always crawl more than self.urls_limit because we will likely add new URLs before some
# URLs in the queue (the queue having already reached the limit) have been fetched
if self.done():
return
if (self.crawled_pages % self.PRINT_STATS_EVERY_X_CRAWLED_PAGES) is 0:
delta = time()-self.start_time
print "Current crawl speed: ", self.crawled_pages, "urls crawled,", delta, "seconds,", self.crawled_pages / delta, "pages/second"
if self.links_rule_targeted.link_extractor.matches(response.url):
print "page targeted", response.url
self.crawled_pages += 1
html_p = htmlpage_from_response(response)
scraped_result = self.scraper.scrape_page(html_p)
score = scraped_result[0]['score'][0]
if self.score_field_text_negative_matches:
for to_strip_off in self.score_field_text_negative_matches:
score = score.replace(to_strip_off, '')
print "\n===============================" * 2
print "score=", score
print "\n===============================" * 2
item = (
response.url,
score,
int(time())
)
self.save_to_db(item)
if self.done(): # wasting a little bit resources here because of ">" instead of ">="
return # We do not scrap the links, this time
unique_new_links = set(
[
l for l in self.links_rule.link_extractor.extract_links(response)
if len(l.url) <= 255 and TrendingSpider.extract_domain(l.url) == self.our_domain
]) - self.urls_seen
print "Got", len(unique_new_links), "new links"
self.urls_seen |= unique_new_links
return [Request(link.url) for link in unique_new_links]
def test_start_urls(self):
specs = {"type": "pagination",
"value": None,
"start_urls": ['http://www.spam.com/?p=1',
'http://www.eggs.com/?page=0']
}
lextractor = create_linkextractor_from_specs(specs)
html = """
<a href="http://www.spam.com/?p=100">Click here 1</a>
<a href="http://www.spam.com/?p=200">Click here 2</a>
<a href="http://www.spam.com/?p=300">Click here 3</a>
"""
html_page = htmlpage_from_response(
HtmlResponse(url='http://www.example.com/', body=html))
links = list(lextractor.links_to_follow(html_page))
links = sorted(links, key=lambda link: link.url)
self.assertEqual(len(links), 3)
self.assertEqual(links[0].url, "http://www.spam.com/?p=100")
self.assertEqual(links[1].url, "http://www.spam.com/?p=200")
self.assertEqual(links[2].url, "http://www.spam.com/?p=300")
self.assertEqual(links[0].text, 'Click here 1')
self.assertEqual(links[1].text, 'Click here 2')
self.assertEqual(links[2].text, 'Click here 3')
def extract_html(response):
"""Extracts an html page from the response.
"""
return htmlpage_from_response(response).body
def extract_html(response):
"""Extracts an html page from the response.
"""
return htmlpage_from_response(response).body