def whois(self, url, timeout=10):
"""Return text of this whois query
"""
domain = common.get_domain(url)
if domain:
text = ''
key = 'whois_%s' % domain
try:
if self.cache:
text = self.cache[key]
else:
raise KeyError()
except KeyError:
# try local whois command
r = subprocess.Popen(['whois', domain], stdout=subprocess.PIPE)
start = time.time()
while r.poll() is None:
time.sleep(0.5)
if time.time() - start > timeout:
try:
r.kill()
except Exception, e:
pass
break
if r.poll() != 1:
text = r.communicate()[0]
if '@' in text:
if self.cache:
self.cache[key] = text
return text
def whois(self, url, timeout=10):
"""Return text of this whois query
"""
domain = common.get_domain(url)
if domain:
text = ''
key = 'whois_%s' % domain
try:
if self.cache:
text = self.cache[key]
else:
raise KeyError()
except KeyError:
# try local whois command
r = subprocess.Popen(['whois', domain], stdout=subprocess.PIPE)
start = time.time()
while r.poll() is None:
time.sleep(0.5)
if time.time() - start > timeout:
try:
r.kill()
except Exception, e:
pass
break
if r.poll() != 1:
text = r.communicate()[0]
if '@' in text:
if self.cache:
self.cache[key] = text
return text
def throttle(self, url, delay, proxy=None, variance=0.5):
"""Delay a minimum time for each domain per proxy by storing last access time
`url' is what intend to download
`delay' is the minimum amount of time (in seconds) to wait after downloading content from this domain
`proxy' is the proxy to download through
`variance' is the amount of randomness in delay, 0-1
"""
key = str(proxy) + ":" + common.get_domain(url)
start = datetime.now()
while datetime.now() < Download.domains.get(key, start):
time.sleep(SLEEP_TIME)
# update domain timestamp to when can query next
Download.domains[key] = datetime.now() + timedelta(seconds=delay * (1 + variance * (random.random() - 0.5)))
def crawl(self, D, url, html):
"""Crawl website html and return list of URLs crawled
"""
def normalize(link):
"""Normalize the link to avoid duplicates
"""
if '#' in link:
# remove internal links to avoid duplicates
link = link[:link.index('#')]
link = common.unescape(link) # remove & from link
return urlparse.urljoin(url, link) # support relative links
def valid(link):
"""Check if should crawl this link
"""
# check if a media file
if common.get_extension(link) not in common.MEDIA_EXTENSIONS:
# check if a proper HTTP link
if link.lower().startswith('http'):
# only crawl within website
if common.same_domain(domain, link):
# passes regex
if self.allowed_urls.match(
link) and not self.banned_urls.match(link):
# not blocked by robots.txt
if not self.robots or self.robots.can_fetch(
settings.user_agent, link):
# allowed to recrawl
if self.crawl_existing or (D.cache and link
not in D.cache):
return True
return False
domain = common.get_domain(url)
depth = CrawlerCallback.found[url]
outstanding = []
if depth != self.max_depth:
# extract links to continue crawling
links_re = re.compile('<a[^>]+href=["\'](.*?)["\']', re.IGNORECASE)
for link in links_re.findall(html):
link = normalize(link)
if link not in CrawlerCallback.found:
CrawlerCallback.found[link] = depth + 1
if valid(link):
# is a new link
outstanding.append(link)
if len(outstanding) == self.max_links:
break
return outstanding
def throttle(self, url, delay, proxy=None, variance=0.5):
"""Delay a minimum time for each domain per proxy by storing last access time
`url' is what intend to download
`delay' is the minimum amount of time (in seconds) to wait after downloading content from this domain
`proxy' is the proxy to download through
`variance' is the amount of randomness in delay, 0-1
"""
if delay > 0:
key = str(proxy) + ':' + common.get_domain(url)
start = datetime.datetime.now()
while datetime.datetime.now() < Download.domains.get(key, start):
time.sleep(SLEEP_TIME)
# update domain timestamp to when can query next
Download.domains[key] = datetime.datetime.now() + datetime.timedelta(seconds=delay * (1 + variance * (random.random() - 0.5)))
def crawl(self, D, url, html):
"""Crawl website html and return list of URLs crawled
"""
def normalize(link):
"""Normalize the link to avoid duplicates
"""
if '#' in link:
# remove internal links to avoid duplicates
link = link[:link.index('#')]
link = common.unescape(link) # remove & from link
return urlparse.urljoin(url, link) # support relative links
def valid(link):
"""Check if should crawl this link
"""
# check if a media file
if common.get_extension(link) not in common.MEDIA_EXTENSIONS:
# check if a proper HTTP link
if link.lower().startswith('http'):
# only crawl within website
if common.same_domain(domain, link):
# passes regex
if self.allowed_urls.match(link) and not self.banned_urls.match(link):
# not blocked by robots.txt
if not self.robots or self.robots.can_fetch(settings.user_agent, link):
# allowed to recrawl
if self.crawl_existing or (D.cache and link not in D.cache):
return True
return False
domain = common.get_domain(url)
depth = CrawlerCallback.found[url]
outstanding = []
if depth != self.max_depth:
# extract links to continue crawling
links_re = re.compile('<a[^>]+href=["\'](.*?)["\']', re.IGNORECASE)
for link in links_re.findall(html):
link = normalize(link)
if link not in CrawlerCallback.found:
CrawlerCallback.found[link] = depth + 1
if valid(link):
# is a new link
outstanding.append(link)
if len(outstanding) == self.max_links:
break
return outstanding
def crawl(self, D, url, html):
"""Crawl website html and return list of URLs crawled
"""
def valid(link):
"""Check if should crawl this link
"""
# check if a media file
if common.get_extension(link) not in common.MEDIA_EXTENSIONS:
# check if a proper HTTP link
if link.lower().startswith('http'):
# only crawl within website
if common.same_domain(domain, link):
# passes regex
if self.allowed_urls.match(
link) and not self.banned_urls.match(link):
# not blocked by robots.txt
if not self.robots or self.robots.can_fetch(
settings.user_agent, link):
# allowed to recrawl
if self.crawl_existing or (D.cache and link
not in D.cache):
return True
return False
domain = common.get_domain(url)
depth = self.found[url]
outstanding = []
if depth != self.max_depth:
# extract links to continue crawling
links_re = re.compile('<a[^>]+href=["\'](.*?)["\']', re.IGNORECASE)
for link in links_re.findall(html):
try:
link = self.normalize(url, link)
except UnicodeDecodeError as e:
# unicode error when joining url
common.logger.info(e)
else:
if link not in self.found:
self.found[link] = depth + 1
if valid(link):
# is a new link
outstanding.append(link)
if len(outstanding) == self.max_links:
break
return outstanding
def whois(self, url, timeout=10):
"""Query whois info
"""
domain = common.get_domain(url)
if domain:
text = ''
key = 'whois_%s' % domain
try:
if self.cache:
text = self.cache[key]
else:
raise KeyError()
except KeyError:
# try online whois app
query_url = 'http://whois.chinaz.com/%s' % domain
html = self.get(query_url)
match = re.compile(
"<script src='(request.aspx\?domain=.*?)'></script>"
).search(html)
if match:
script_url = urlparse.urljoin(query_url, match.groups()[0])
text = self.get(script_url, read_cache=False)
if '@' not in text:
if self.cache:
del self.cache[query_url]
# failed, so try local whois command
r = subprocess.Popen(['whois', domain],
stdout=subprocess.PIPE)
start = time.time()
while r.poll() is None:
time.sleep(0.5)
if time.time() - start > timeout:
try:
r.kill()
except Exception, e:
pass
break
if r.poll() != 1:
text = r.communicate()[0]
if '@' in text:
if self.cache:
self.cache[key] = text
return text
def throttle(self, url, delay, proxy=None, variance=0.5):
"""Delay a minimum time for each domain per proxy by storing last access time
url
what intend to download
delay
the minimum amount of time (in seconds) to wait after downloading content from this domain
proxy
the proxy to download through
variance
the amount of randomness in delay, 0-1
"""
if delay > 0:
key = str(proxy) + ':' + common.get_domain(url)
if key in Download._domains:
while datetime.datetime.now() < Download._domains.get(key):
time.sleep(SLEEP_TIME)
# update domain timestamp to when can query next
Download._domains[key] = datetime.datetime.now() + datetime.timedelta(seconds=delay * (1 + variance * (random.random() - 0.5)))
def throttle(self, url, delay, proxy=None, variance=0.5):
"""Delay a minimum time for each domain per proxy by storing last access time
url
what intend to download
delay
the minimum amount of time (in seconds) to wait after downloading content from this domain
proxy
the proxy to download through
variance
the amount of randomness in delay, 0-1
"""
if delay > 0:
key = ':'.join([str(proxy), self.throttle_additional_key or '', common.get_domain(url)])
if key in Download._domains:
while datetime.datetime.now() < Download._domains.get(key):
time.sleep(SLEEP_TIME)
# update domain timestamp to when can query next
Download._domains[key] = datetime.datetime.now() + datetime.timedelta(seconds=delay * (1 + variance * (random.random() - 0.5)))
def whois(self, url, timeout=10):
"""Return text of this whois query
"""
domain = common.get_domain(url)
if domain:
text = ''
key = 'whois_%s' % domain
try:
if self.cache:
text = self.cache[key]
else:
raise KeyError()
except KeyError:
# try online whois app
query_url = 'http://whois.chinaz.com/%s' % domain
html = self.get(query_url)
match = re.compile("<script src='(request.aspx\?domain=.*?)'></script>").search(html)
if match:
script_url = urlparse.urljoin(query_url, match.groups()[0])
text = self.get(script_url, read_cache=False)
if '@' not in text:
if self.cache:
del self.cache[query_url]
# failed, so try local whois command
r = subprocess.Popen(['whois', domain], stdout=subprocess.PIPE)
start = time.time()
while r.poll() is None:
time.sleep(0.5)
if time.time() - start > timeout:
try:
r.kill()
except Exception, e:
pass
break
if r.poll() != 1:
text = r.communicate()[0]
if '@' in text:
if self.cache:
self.cache[key] = text
return text
def crawl(self, D, url, html):
"""Crawl website html and return list of URLs crawled
"""
def valid(link):
"""Check if should crawl this link
"""
# check if a media file
if common.get_extension(link) not in common.MEDIA_EXTENSIONS:
# check if a proper HTTP link
if link.lower().startswith('http'):
# only crawl within website
if common.same_domain(domain, link):
# passes regex
if self.allowed_urls.match(link) and not self.banned_urls.match(link):
# not blocked by robots.txt
if not self.robots or self.robots.can_fetch(settings.user_agent, link):
# allowed to recrawl
if self.crawl_existing or (D.cache and link not in D.cache):
return True
return False
domain = common.get_domain(url)
depth = self.found[url]
outstanding = []
if depth != self.max_depth:
# extract links to continue crawling
links_re = re.compile('<a[^>]+href=["\'](.*?)["\']', re.IGNORECASE)
for link in links_re.findall(html):
try:
link = self.normalize(url, link)
except UnicodeDecodeError as e:
# unicode error when joining url
common.logger.info(e)
else:
if link not in self.found:
self.found[link] = depth + 1
if valid(link):
# is a new link
outstanding.append(link)
if len(outstanding) == self.max_links:
break
return outstanding
