def _uri_from_curi(self, curi):
"""
Create the uri tuple from the :class:`CrawlUri` and calculate the
priority.
Overwrite this method in more specific frontiers.
"""
etag = mod_date = None
if curi.rep_header:
if "Etag" in curi.rep_header:
etag = curi.rep_header["Etag"]
if "Last-Modified" in curi.rep_header:
mod_date = time.mktime(deserialize_date_time(
curi.rep_header["Last-Modified"]).timetuple())
if not mod_date and 'Date' in curi.rep_header:
mod_date = time.mktime(deserialize_date_time(
curi.rep_header["Date"]).timetuple())
if mod_date:
# only reschedule if it has been crawled before
(prio, next_crawl_date) = self._reschedule_uri(curi)
else:
(prio, next_crawl_date) = (1,
time.mktime(datetime.now(self._timezone).timetuple()))
return (curi.url, etag, mod_date, next_crawl_date, prio)
def _uri_from_curi(self, curi):
"""
Create the uri tuple from the :class:`CrawlUri` and calculate the
priority.
Overwrite this method in more specific frontiers.
"""
etag = mod_date = None
if curi.rep_header:
if "Etag" in curi.rep_header:
etag = curi.rep_header["Etag"]
if "Last-Modified" in curi.rep_header:
mod_date = time.mktime(
deserialize_date_time(
curi.rep_header["Last-Modified"]).timetuple())
if not mod_date and 'Date' in curi.rep_header:
mod_date = time.mktime(
deserialize_date_time(curi.rep_header["Date"]).timetuple())
if mod_date:
# only reschedule if it has been crawled before
(prio, next_crawl_date) = self._reschedule_uri(curi)
else:
(prio,
next_crawl_date) = (1,
time.mktime(
datetime.now(self._timezone).timetuple()))
return (curi.url, etag, mod_date, next_crawl_date, prio)
def __call__(self, msg, out_stream):
"""
Work on the current `DataMessage` and send the result to `out_stream`.
"""
# prepare the HTTPHeaders
headers = prepare_headers(msg)
last_modified = None
if msg.curi.req_header:
# check if we have a date when the page was last crawled
if "Last-Modified" in msg.curi.req_header:
last_modified = deserialize_date_time(
msg.curi.req_header["Last-Modified"])
# check if we have username and password present
auth_username = None
auth_password = None
if msg.curi.optional_vars and \
CURI_SITE_USERNAME in msg.curi.optional_vars and \
CURI_SITE_PASSWORD in msg.curi.optional_vars:
auth_username = msg.curi.optional_vars[CURI_SITE_USERNAME]
auth_password = msg.curi.optional_vars[CURI_SITE_PASSWORD]
# create the request
request = HTTPRequest(msg.curi.effective_url,
method="GET",
headers=headers,
auth_username=auth_username,
auth_password=auth_password,
if_modified_since=last_modified,
follow_redirects=self._follow_redirects,
max_redirects=self._max_redirects,
user_agent=self._user_agent,
request_timeout=self._request_timeout,
connect_timeout=self._connect_timeout,
validate_cert=self._validate_cert)
if hasattr(self, '_proxy_configuration'):
request.proxy_host = self._proxy_configuration['host']
request.proxy_port = self._proxy_configuration['port']
request.proxy_username = \
self._proxy_configuration.get('user', None)
request.proxy_password = \
self._proxy_configuration.get('password', None)
LOG.info("proc.fetch::request for %s" % msg.curi.url)
self._client.fetch(request, handle_response(msg, out_stream))
def __call__(self, msg, out_stream):
"""
Work on the current `DataMessage` and send the result to `out_stream`.
"""
# prepare the HTTPHeaders
headers = prepare_headers(msg)
last_modified = None
if msg.curi.req_header:
# check if we have a date when the page was last crawled
if "Last-Modified" in msg.curi.req_header:
last_modified = deserialize_date_time(
msg.curi.req_header["Last-Modified"])
# check if we have username and password present
auth_username = None
auth_password = None
if msg.curi.optional_vars and \
CURI_SITE_USERNAME in msg.curi.optional_vars and \
CURI_SITE_PASSWORD in msg.curi.optional_vars:
auth_username = msg.curi.optional_vars[CURI_SITE_USERNAME]
auth_password = msg.curi.optional_vars[CURI_SITE_PASSWORD]
# create the request
request = HTTPRequest(msg.curi.effective_url,
method="GET",
headers=headers,
auth_username=auth_username,
auth_password=auth_password,
if_modified_since=last_modified,
follow_redirects=self._follow_redirects,
max_redirects=self._max_redirects,
user_agent=self._user_agent,
request_timeout = self._request_timeout,
connect_timeout = self._connect_timeout,
validate_cert = self._validate_cert)
if hasattr(self, '_proxy_configuration'):
request.proxy_host = self._proxy_configuration['host']
request.proxy_port = self._proxy_configuration['port']
request.proxy_username = \
self._proxy_configuration.get('user', None)
request.proxy_password = \
self._proxy_configuration.get('password', None)
LOG.info("proc.fetch::request for %s" % msg.curi.url)
self._client.fetch(request, handle_response(msg, out_stream))