def _process_scrape_info(self, scraper: BaseScraper,
scrape_result: ScrapeResult,
item_session: ItemSession):
'''Collect the URLs from the scrape info dict.'''
if not scrape_result:
return 0, 0
num_inline = 0
num_linked = 0
for link_context in scrape_result.link_contexts:
url_info = self.parse_url(link_context.link)
if not url_info:
continue
url_info = self.rewrite_url(url_info)
child_url_record = item_session.child_url_record(
url_info.url, inline=link_context.inline
)
if not self._fetch_rule.consult_filters(item_session.request.url_info, child_url_record)[0]:
continue
if link_context.inline:
num_inline += 1
else:
num_linked += 1
item_session.add_child_url(url_info.url, inline=link_context.inline,
link_type=link_context.link_type)
return num_inline, num_linked
def _process_scrape_info(self, scraper: BaseScraper,
scrape_result: ScrapeResult,
item_session: ItemSession):
'''Collect the URLs from the scrape info dict.'''
if not scrape_result:
return 0, 0
num_inline = 0
num_linked = 0
for link_context in scrape_result.link_contexts:
url_info = self.parse_url(link_context.link)
if not url_info:
continue
url_info = self.rewrite_url(url_info)
child_url_record = item_session.child_url_record(
url_info.url, inline=link_context.inline)
if not self._fetch_rule.consult_filters(
item_session.request.url_info, child_url_record)[0]:
continue
if link_context.inline:
num_inline += 1
else:
num_linked += 1
item_session.add_child_url(url_info.url,
inline=link_context.inline,
link_type=link_context.link_type)
return num_inline, num_linked
def my_get_urls(self, item_session: ItemSession):
the_url = item_session.request.url
logger.info("get_urls() for url `%s`", the_url)
if the_url.startswith(VALKYRIE_URL_PREFIX) \
or (the_url.startswith(CHIHIRO_URL_PREFIX) and not the_url.endswith(CHIHIRO_IMAGE_URL_SUFFIX)):
the_type = None
if the_url.startswith(VALKYRIE_URL_PREFIX):
the_type = UrlType.VALKYRIE
elif the_url.startswith(CHIHIRO_URL_PREFIX):
the_type = UrlType.CHIHIRO
else:
raise Exception("unknown url prefix? `%s`", the_url)
urls = self.process_result(the_type, item_session)
for iter_url in urls:
item_session.add_child_url(iter_url)
else:
# not one of the main JSON api urls, don't add any new urls
logger.info("url doesn't start with JSON api prefix, or had the /image suffix, not adding any new urls")
def new_mock_item_session():
args = argparse.Namespace(directory_prefix='/tmp/')
app_session = AppSession(None, args, None)
url_record = new_mock_url_record()
item_session = ItemSession(app_session, url_record)
item_session.request = BaseRequest()
item_session.request.url = 'http://example.com'
return item_session
def handle_pre_response(self, item_session: ItemSession) -> Actions:
'''Process a response that is starting.'''
action = self.consult_pre_response_hook(item_session)
if action == Actions.RETRY:
item_session.set_status(Status.skipped)
elif action == Actions.FINISH:
item_session.set_status(Status.done)
elif action == Actions.STOP:
raise HookStop('Script requested immediate stop.')
return action
def process(self, item_session: ItemSession):
scheme = item_session.url_record.url_info.scheme
processor = self._processors.get(scheme)
if processor:
return (yield from processor.process(item_session))
else:
_logger.warning(
_('No processor available to handle {scheme} scheme.'),
scheme=repr(scheme))
item_session.skip()
def handle_pre_response(self, item_session: ItemSession) -> Actions:
'''Process a response that is starting.'''
action = self.consult_pre_response_hook(item_session)
if action == Actions.RETRY:
item_session.set_status(Status.skipped)
elif action == Actions.FINISH:
item_session.set_status(Status.done)
elif action == Actions.STOP:
raise HookStop('Script requested immediate stop.')
return action
def process(self, item_session: ItemSession):
scheme = item_session.url_record.url_info.scheme
processor = self._processors.get(scheme)
if processor:
return (yield from processor.process(item_session))
else:
_logger.warning(
_('No processor available to handle {scheme} scheme.'),
scheme=repr(scheme)
)
item_session.skip()
def add_extra_urls(self, item_session: ItemSession):
'''Add additional URLs such as robots.txt, favicon.ico.'''
if item_session.url_record.level == 0 and self._sitemaps:
extra_url_infos = (
self.parse_url('{0}://{1}/robots.txt'.format(
item_session.url_record.url_info.scheme,
item_session.url_record.url_info.hostname_with_port)),
self.parse_url('{0}://{1}/sitemap.xml'.format(
item_session.url_record.url_info.scheme,
item_session.url_record.url_info.hostname_with_port)))
for url_info in extra_url_infos:
item_session.add_child_url(url_info.url)
def handle_no_document(self, item_session: ItemSession) -> Actions:
'''Callback for successful responses containing no useful document.
Returns:
A value from :class:`.hook.Actions`.
'''
self._waiter.reset()
action = self.handle_response(item_session)
if action == Actions.NORMAL:
item_session.set_status(Status.skipped)
return action
def handle_no_document(self, item_session: ItemSession) -> Actions:
'''Callback for successful responses containing no useful document.
Returns:
A value from :class:`.hook.Actions`.
'''
self._waiter.reset()
action = self.handle_response(item_session)
if action == Actions.NORMAL:
item_session.set_status(Status.skipped)
return action
def get_urls(self, item_session: ItemSession):
filename = item_session.response.body.name
url_info = item_session.request.url_info
print('get_urls', filename)
assert filename
assert os.path.isfile(filename)
assert url_info.url
if url_info.path == '/':
item_session.add_child_url('http://localhost:' +
str(url_info.port) + '/post/',
inline=True,
post_data='text=hello',
replace=True)
item_session.add_child_url('..malformed')
def handle_document(self, item_session: ItemSession, filename: str) -> Actions:
'''Process a successful document response.
Returns:
A value from :class:`.hook.Actions`.
'''
self._waiter.reset()
action = self.handle_response(item_session)
if action == Actions.NORMAL:
self._statistics.increment(item_session.response.body.size())
item_session.set_status(Status.done, filename=filename)
return action
def get_urls(self, item_session: ItemSession):
filename = item_session.response.body.name
url_info = item_session.request.url_info
print('get_urls', filename)
assert filename
assert os.path.isfile(filename)
assert url_info.url
if url_info.path == '/':
item_session.add_child_url(
'http://localhost:' + str(url_info.port) + '/post/',
inline=True,
post_data='text=hello',
replace=True
)
item_session.add_child_url('..malformed')
def handle_document(self, item_session: ItemSession,
filename: str) -> Actions:
'''Process a successful document response.
Returns:
A value from :class:`.hook.Actions`.
'''
self._waiter.reset()
action = self.handle_response(item_session)
if action == Actions.NORMAL:
self._statistics.increment(item_session.response.body.size())
item_session.set_status(Status.done, filename=filename)
return action
def handle_response(self, item_session: ItemSession) -> Actions:
'''Generic handler for a response.
Returns:
A value from :class:`.hook.Actions`.
'''
action = self.consult_response_hook(item_session)
if action == Actions.RETRY:
item_session.set_status(Status.error)
elif action == Actions.FINISH:
item_session.set_status(Status.done)
elif action == Actions.STOP:
raise HookStop('Script requested immediate stop.')
return action
def handle_document_error(self, item_session: ItemSession) -> Actions:
'''Callback for when the document only describes an server error.
Returns:
A value from :class:`.hook.Actions`.
'''
self._waiter.increment()
self._statistics.errors[ServerError] += 1
action = self.handle_response(item_session)
if action == Actions.NORMAL:
item_session.set_status(Status.error)
return action
def handle_document_error(self, item_session: ItemSession) -> Actions:
'''Callback for when the document only describes an server error.
Returns:
A value from :class:`.hook.Actions`.
'''
self._waiter.increment()
self._statistics.errors[ServerError] += 1
action = self.handle_response(item_session)
if action == Actions.NORMAL:
item_session.set_status(Status.error)
return action
def handle_response(self, item_session: ItemSession) -> Actions:
'''Generic handler for a response.
Returns:
A value from :class:`.hook.Actions`.
'''
action = self.consult_response_hook(item_session)
if action == Actions.RETRY:
item_session.set_status(Status.error)
elif action == Actions.FINISH:
item_session.set_status(Status.done)
elif action == Actions.STOP:
raise HookStop('Script requested immediate stop.')
return action
def add_extra_urls(self, item_session: ItemSession):
'''Add additional URLs such as robots.txt, favicon.ico.'''
if item_session.url_record.level == 0 and self._sitemaps:
extra_url_infos = (
self.parse_url(
'{0}://{1}/robots.txt'.format(
item_session.url_record.url_info.scheme,
item_session.url_record.url_info.hostname_with_port)
),
self.parse_url(
'{0}://{1}/sitemap.xml'.format(
item_session.url_record.url_info.scheme,
item_session.url_record.url_info.hostname_with_port)
)
)
for url_info in extra_url_infos:
item_session.add_child_url(url_info.url)
def handle_error(self, item_session: ItemSession,
error: BaseException) -> Actions:
'''Process an error.
Returns:
A value from :class:`.hook.Actions`.
'''
if not self._ssl_verification and \
isinstance(error, SSLVerificationError):
# Change it into a different error since the user doesn't care
# about verifying certificates
self._statistics.increment_error(ProtocolError())
else:
self._statistics.increment_error(error)
self._waiter.increment()
action = self.consult_error_hook(item_session, error)
if action == Actions.RETRY:
item_session.set_status(Status.error)
elif action == Actions.FINISH:
item_session.set_status(Status.done)
elif action == Actions.STOP:
raise HookStop('Script requested immediate stop.')
elif self._ssl_verification and isinstance(error,
SSLVerificationError):
raise
elif isinstance(error, ConnectionRefused) and \
not self.retry_connrefused:
item_session.set_status(Status.skipped)
elif isinstance(error, DNSNotFound) and \
not self.retry_dns_error:
item_session.set_status(Status.skipped)
else:
item_session.set_status(Status.error)
return action
def handle_error(self, item_session: ItemSession, error: BaseException) -> Actions:
'''Process an error.
Returns:
A value from :class:`.hook.Actions`.
'''
if not self._ssl_verification and \
isinstance(error, SSLVerificationError):
# Change it into a different error since the user doesn't care
# about verifying certificates
self._statistics.increment_error(ProtocolError())
else:
self._statistics.increment_error(error)
self._waiter.increment()
action = self.consult_error_hook(item_session, error)
if action == Actions.RETRY:
item_session.set_status(Status.error)
elif action == Actions.FINISH:
item_session.set_status(Status.done)
elif action == Actions.STOP:
raise HookStop('Script requested immediate stop.')
elif self._ssl_verification and isinstance(error, SSLVerificationError):
raise
elif isinstance(error, ConnectionRefused) and \
not self.retry_connrefused:
item_session.set_status(Status.skipped)
elif isinstance(error, DNSNotFound) and \
not self.retry_dns_error:
item_session.set_status(Status.skipped)
else:
item_session.set_status(Status.error)
return action
def process(self, session: ItemSession):
yield from session.app_session.factory['Processor'].process(session)
assert session.is_processed
session.finish()
def process(self, session: ItemSession):
yield from session.app_session.factory['Processor'].process(session)
assert session.is_processed
session.finish()
