def get_links(self, html_soup, original_url_split):
"""Get Link for desired types (e.g., a, link, img, script)
:param html_soup: The page parsed by BeautifulSoup
:param original_url_split: The URL of the page used to resolve relative
links.
:rtype: A sequence of Link objects
"""
# This is a weird html tag that defines the base URL of a page.
base_url_split = original_url_split
bases = html_soup.find_all('base')
if bases:
base = bases[0]
if 'href' in base.attrs:
base_url_split = get_clean_url_split(base['href'])
links = []
for element_type in self.worker_config.types:
if element_type not in TYPE_ATTRIBUTES:
raise Exception("Unknown element type: {0}".
format(element_type))
attribute = TYPE_ATTRIBUTES[element_type]
element_links = html_soup.find_all(element_type)
links.extend(self._get_links(element_links, attribute,
base_url_split, original_url_split))
return links
def get_links(self, html_soup, original_url_split):
"""Get Link for desired types (e.g., a, link, img, script)
:param html_soup: The page parsed by BeautifulSoup
:param original_url_split: The URL of the page used to resolve relative
links.
:rtype: A sequence of Link objects
"""
# This is a weird html tag that defines the base URL of a page.
base_url_split = original_url_split
bases = html_soup.find_all('base')
if bases:
base = bases[0]
if 'href' in base.attrs:
base_url_split = get_clean_url_split(base['href'])
links = []
for element_type in self.worker_config.types:
if element_type not in TYPE_ATTRIBUTES:
raise Exception("Unknown element type: {0}".
format(element_type))
attribute = TYPE_ATTRIBUTES[element_type]
element_links = html_soup.find_all(element_type)
links.extend(self._get_links(element_links, attribute,
base_url_split, original_url_split))
return links
def __init__(self, config, logger):
self.config = config
self.start_url_splits = []
for start_url in config.start_urls:
self.start_url_splits.append(get_clean_url_split(start_url))
self.workers = []
self.input_queue = self.build_queue(config)
self.output_queue = self.build_queue(config)
self.logger = logger
self.site = Site(self.start_url_splits, config, self.logger)
def __init__(self, config, logger):
self.config = config
self.start_url_splits = []
for start_url in config.start_urls:
self.start_url_splits.append(get_clean_url_split(start_url))
self.workers = []
self.input_queue = self.build_queue(config)
self.output_queue = self.build_queue(config)
self.logger = logger
self.site = Site(self.start_url_splits, config, self.logger)
def _build_accepted_hosts(self, options, start_urls):
hosts = set()
urls = []
if self.options.accepted_hosts:
urls = self.options.accepted_hosts.split(',')
urls = urls + start_urls
for url in urls:
split_result = get_clean_url_split(url)
hosts.add(split_result.netloc)
return hosts
def test_get_absolute_url(self):
base_url_split = get_clean_url_split(
"https://www.example.com/hello/index.html")
self.assertEqual("https://www.example2.com/test.js",
get_absolute_url_split("//www.example2.com/test.js",
base_url_split).geturl())
self.assertEqual("https://www.example.com/hello2/test.html",
get_absolute_url_split("/hello2/test.html",
base_url_split).geturl())
self.assertEqual("https://www.example.com/hello/test.html",
get_absolute_url_split("test.html", base_url_split).geturl())
self.assertEqual("https://www.example.com/test.html",
get_absolute_url_split("../test.html", base_url_split).geturl())
def _build_accepted_hosts(self, options, start_urls):
hosts = set()
urls = []
if self.options.accepted_hosts:
urls = self.options.accepted_hosts.split(',')
urls = urls + start_urls
for url in urls:
split_result = get_clean_url_split(url)
hosts.add(split_result.netloc)
return hosts
def test_get_absolute_url(self):
base_url_split = get_clean_url_split(
"https://www.example.com/hello/index.html")
self.assertEqual("https://www.example2.com/test.js",
get_absolute_url_split("//www.example2.com/test.js",
base_url_split).geturl())
self.assertEqual("https://www.example.com/hello2/test.html",
get_absolute_url_split("/hello2/test.html",
base_url_split).geturl())
self.assertEqual("https://www.example.com/hello/test.html",
get_absolute_url_split("test.html", base_url_split).geturl())
self.assertEqual("https://www.example.com/test.html",
get_absolute_url_split("../test.html", base_url_split).geturl())
def get_page_crawler(self, url):
url = self.get_url(url)
url_split = get_clean_url_split(url)
input_queue = compat.Queue.Queue()
output_queue = compat.Queue.Queue()
worker_config = WorkerConfig(username=None, password=None, types=['a',
'img', 'link', 'script'], timeout=5, parser=PARSER_STDLIB)
worker_init = WorkerInit(worker_config=worker_config,
input_queue=input_queue, output_queue=output_queue,
logger=get_logger())
page_crawler = PageCrawler(worker_init)
return page_crawler, url_split
def get_page_crawler(self, url):
url = self.get_url(url)
url_split = get_clean_url_split(url)
input_queue = compat.Queue.Queue()
output_queue = compat.Queue.Queue()
worker_config = WorkerConfig(username=None, password=None, types=['a',
'img', 'link', 'script'], timeout=5, parser=PARSER_STDLIB,
strict_mode=False)
worker_init = WorkerInit(worker_config=worker_config,
input_queue=input_queue, output_queue=output_queue,
logger=get_logger())
page_crawler = PageCrawler(worker_init)
return page_crawler, url_split
def test_clean_url_split(self):
self.assertEqual("http://www.example.com",
get_clean_url_split("www.example.com").geturl())
self.assertEqual("http://www.example.com",
get_clean_url_split("//www.example.com").geturl())
self.assertEqual("http://www.example.com",
get_clean_url_split("http://www.example.com").geturl())
self.assertEqual("http://www.example.com/",
get_clean_url_split("www.example.com/").geturl())
self.assertEqual("http://www.example.com/",
get_clean_url_split("//www.example.com/").geturl())
self.assertEqual("http://www.example.com/",
get_clean_url_split("http://www.example.com/").geturl())
def test_clean_url_split(self):
self.assertEqual("http://www.example.com",
get_clean_url_split("www.example.com").geturl())
self.assertEqual("http://www.example.com",
get_clean_url_split("//www.example.com").geturl())
self.assertEqual("http://www.example.com",
get_clean_url_split("http://www.example.com").geturl())
self.assertEqual("http://www.example.com/",
get_clean_url_split("www.example.com/").geturl())
self.assertEqual("http://www.example.com/",
get_clean_url_split("//www.example.com/").geturl())
self.assertEqual("http://www.example.com/",
get_clean_url_split("http://www.example.com/").geturl())
def _crawl_page(self, worker_input):
page_crawl = None
url_split_to_crawl = worker_input.url_split
try:
response = open_url(self.urlopen, self.request_class,
url_split_to_crawl.geturl(), self.worker_config.timeout,
self.timeout_exception, self.worker_config.user_agent, self.auth_header)
if response.exception:
if response.status:
# This is a http error. Good.
page_crawl = PageCrawl(
original_url_split=url_split_to_crawl,
final_url_split=None, status=response.status,
is_timeout=False, is_redirect=False, links=[],
exception=None, is_html=False)
elif response.is_timeout:
# This is a timeout. No need to wrap the exception
page_crawl = PageCrawl(
original_url_split=url_split_to_crawl,
final_url_split=None, status=None,
is_timeout=True, is_redirect=False, links=[],
exception=None, is_html=False)
else:
# Something bad happened when opening the url
exception = ExceptionStr(unicode(type(response.exception)),
unicode(response.exception))
page_crawl = PageCrawl(
original_url_split=url_split_to_crawl,
final_url_split=None, status=None,
is_timeout=False, is_redirect=False, links=[],
exception=exception, is_html=False)
else:
final_url_split = get_clean_url_split(response.final_url)
mime_type = get_content_type(response.content.info())
links = []
is_html = mime_type == HTML_MIME_TYPE
if is_html and worker_input.should_crawl:
html_soup = BeautifulSoup(response.content,
self.worker_config.parser)
links = self.get_links(html_soup, final_url_split)
else:
self.logger.debug("Won't crawl %s. MIME Type: %s. Should crawl: %s",
final_url_split, mime_type,
worker_input.should_crawl)
page_crawl = PageCrawl(original_url_split=url_split_to_crawl,
final_url_split=final_url_split, status=response.status,
is_timeout=False, is_redirect=response.is_redirect,
links=links, exception=None, is_html=is_html)
except Exception as exc:
exception = ExceptionStr(unicode(type(exc)), unicode(exc))
page_crawl = PageCrawl(original_url_split=url_split_to_crawl,
final_url_split=None, status=None,
is_timeout=False, is_redirect=False, links=[],
exception=exception, is_html=False)
self.logger.exception("Exception occurred while crawling a page.")
return page_crawl
def _crawl_page(self, worker_input):
page_crawl = None
url_split_to_crawl = worker_input.url_split
try:
response = open_url(self.urlopen, self.request_class,
url_split_to_crawl.geturl(), self.worker_config.timeout,
self.timeout_exception, self.auth_header)
if response.exception:
if response.status:
# This is a http error. Good.
page_crawl = PageCrawl(
original_url_split=url_split_to_crawl,
final_url_split=None, status=response.status,
is_timeout=False, is_redirect=False, links=[],
exception=None, is_html=False)
elif response.is_timeout:
# This is a timeout. No need to wrap the exception
page_crawl = PageCrawl(
original_url_split=url_split_to_crawl,
final_url_split=None, status=None,
is_timeout=True, is_redirect=False, links=[],
exception=None, is_html=False)
else:
# Something bad happened when opening the url
exception = ExceptionStr(unicode(type(response.exception)),
unicode(response.exception))
page_crawl = PageCrawl(
original_url_split=url_split_to_crawl,
final_url_split=None, status=None,
is_timeout=False, is_redirect=False, links=[],
exception=exception, is_html=False)
else:
final_url_split = get_clean_url_split(response.final_url)
mime_type = get_content_type(response.content.info())
links = []
is_html = mime_type == HTML_MIME_TYPE
if is_html and worker_input.should_crawl:
html_soup = BeautifulSoup(response.content,
self.worker_config.parser)
links = self.get_links(html_soup, final_url_split)
else:
self.logger.debug("Won't crawl %s. MIME Type: %s. Should crawl: %s",
final_url_split, mime_type,
worker_input.should_crawl)
page_crawl = PageCrawl(original_url_split=url_split_to_crawl,
final_url_split=final_url_split, status=response.status,
is_timeout=False, is_redirect=response.is_redirect,
links=links, exception=None, is_html=is_html)
except Exception as exc:
exception = ExceptionStr(unicode(type(exc)), unicode(exc))
page_crawl = PageCrawl(original_url_split=url_split_to_crawl,
final_url_split=None, status=None,
is_timeout=False, is_redirect=False, links=[],
exception=exception, is_html=False)
self.logger.exception("Exception occurred while crawling a page.")
return page_crawl
