def _set_response(self, val):
warn(
'The `Grab.response` attribute is deprecated. '
'Use `Grab.doc` instead.',
stacklevel=3)
# pylint: disable=assigning-non-slot, attribute-defined-outside-init
self.doc = val
def setup_cache(self, backend='mongodb', database=None,
**kwargs):
"""
Setup cache.
:param backend: Backend name
Should be one of the following: 'mongo', 'mysql' or 'postgresql'.
:param database: Database name.
:param kwargs: Additional credentials for backend.
"""
if database is None:
raise SpiderMisuseError('setup_cache method requires database '
'option')
if backend == 'mongo':
warn('Backend name "mongo" is deprecated. Use "mongodb" instead.')
backend = 'mongodb'
mod = __import__('grab.spider.cache_backend.%s' % backend,
globals(), locals(), ['foo'])
backend = mod.CacheBackend(
database=database, spider=self, **kwargs
)
self.cache_reader_service = CacheReaderService(self, backend)
backend = mod.CacheBackend(
database=database, spider=self, **kwargs
)
self.cache_writer_service = CacheWriterService(self, backend)
def submit(self, *args, **kwargs):
warn(
'Method `Document.submit` is deprecated. '
'Use `Grab.submit` method instead.',
stacklevel=3
)
self.grab.submit(*args, **kwargs)
def setup_cache(self, backend='mongodb', database=None,
**kwargs):
"""
Setup cache.
:param backend: Backend name
Should be one of the following: 'mongo', 'mysql' or 'postgresql'.
:param database: Database name.
:param kwargs: Additional credentials for backend.
"""
if database is None:
raise SpiderMisuseError('setup_cache method requires database '
'option')
if backend == 'mongo':
warn('Backend name "mongo" is deprecated. Use "mongodb" instead.')
backend = 'mongodb'
mod = __import__('grab.spider.cache_backend.%s' % backend,
globals(), locals(), ['foo'])
backend = mod.CacheBackend(
database=database, spider=self, **kwargs
)
self.cache_reader_service = CacheReaderService(self, backend)
backend = mod.CacheBackend(
database=database, spider=self, **kwargs
)
self.cache_writer_service = CacheWriterService(self, backend)
def xml_tree(self):
"""
Return DOM-tree of the document built with XML DOM builder.
"""
warn('Attribute `grab.xml_tree` is deprecated. '
'Use `Grab.doc.tree` attribute '
'AND content_type="xml" option instead.')
return self.build_xml_tree()
def xml_tree(self):
"""
Return DOM-tree of the document built with XML DOM builder.
"""
warn('Attribute `grab.xml_tree` is deprecated. '
'Use `Grab.doc.tree` attribute '
'AND content_type="xml" option instead.')
return self.build_xml_tree()
def save_timer(self, key):
warn('Method `Spider::save_timer` is deprecated. '
'Use `Spider::timer.log_time` method instead.')
self.timer.start(key)
try:
yield
finally:
self.timer.stop(key)
def load_module(self, name):
"""
This method is called by Python if CustomImporter.find_module
does not return None.
"""
try:
module = import_module(self.name, 'weblib')
sys.modules[name] = module
warn('Module `grab.tools%s` is deprecated. '
'Use `weblib%s` module.' % (self.name, self.name))
except:
raise ImportError(name)
return module
def add_task(self, task, raise_error=False):
"""
Add task to the task queue.
"""
# MP:
# ***
if self.parser_mode:
self.parser_result_queue.put((task, None))
return
if self.task_queue is None:
raise SpiderMisuseError('You should configure task queue before '
'adding tasks. Use `setup_queue` method.')
if task.priority is None or not task.priority_is_custom:
task.priority = self.generate_task_priority()
task.priority_is_custom = False
else:
task.priority_is_custom = True
try:
if not task.url.startswith(
('http://', 'https://', 'ftp://', 'file://', 'feed://')):
if self.base_url is None:
msg = 'Could not resolve relative URL because base_url ' \
'is not specified. Task: %s, URL: %s'\
% (task.name, task.url)
raise SpiderError(msg)
else:
warn('Class attribute `Spider::base_url` is deprecated. '
'Use Task objects with absolute URLs')
task.url = urljoin(self.base_url, task.url)
# If task has grab_config object then update it too
if task.grab_config:
task.grab_config['url'] = task.url
except Exception as ex:
self.stat.collect('task-with-invalid-url', task.url)
if raise_error:
raise
else:
logger.error('', exc_info=ex)
return False
# TODO: keep original task priority if it was set explicitly
self.task_queue.put(task,
task.priority,
schedule_time=task.schedule_time)
return True
def setup_queue(self, backend='memory', **kwargs):
"""
Setup queue.
:param backend: Backend name
Should be one of the following: 'memory', 'redis' or 'mongo'.
:param kwargs: Additional credentials for backend.
"""
if backend == 'mongo':
warn('Backend name "mongo" is deprecated. Use "mongodb" instead.')
backend = 'mongodb'
logger.debug('Using %s backend for task queue', backend)
mod = __import__('grab.spider.queue_backend.%s' % backend,
globals(), locals(), ['foo'])
self.task_queue = mod.QueueBackend(spider_name=self.get_spider_name(),
**kwargs)
def setup_queue(self, backend='memory', **kwargs):
"""
Setup queue.
:param backend: Backend name
Should be one of the following: 'memory', 'redis' or 'mongo'.
:param kwargs: Additional credentials for backend.
"""
if backend == 'mongo':
warn('Backend name "mongo" is deprecated. Use "mongodb" instead.')
backend = 'mongodb'
logger.debug('Using %s backend for task queue', backend)
mod = __import__('grab.spider.queue_backend.%s' % backend,
globals(), locals(), ['foo'])
self.task_queue = mod.QueueBackend(spider_name=self.get_spider_name(),
**kwargs)
def add_task(self, task, raise_error=False):
"""
Add task to the task queue.
"""
# MP:
# ***
if self.parser_mode:
self.parser_result_queue.put((task, None))
return
if self.task_queue is None:
raise SpiderMisuseError('You should configure task queue before '
'adding tasks. Use `setup_queue` method.')
if task.priority is None or not task.priority_is_custom:
task.priority = self.generate_task_priority()
task.priority_is_custom = False
else:
task.priority_is_custom = True
try:
if not task.url.startswith(('http://', 'https://', 'ftp://',
'file://', 'feed://')):
if self.base_url is None:
msg = 'Could not resolve relative URL because base_url ' \
'is not specified. Task: %s, URL: %s'\
% (task.name, task.url)
raise SpiderError(msg)
else:
warn('Class attribute `Spider::base_url` is deprecated. '
'Use Task objects with absolute URLs')
task.url = urljoin(self.base_url, task.url)
# If task has grab_config object then update it too
if task.grab_config:
task.grab_config['url'] = task.url
except Exception as ex:
self.stat.collect('task-with-invalid-url', task.url)
if raise_error:
raise
else:
logger.error('', exc_info=ex)
return False
# TODO: keep original task priority if it was set explicitly
self.task_queue.put(task, task.priority, schedule_time=task.schedule_time)
return True
def render_stats(self, timing=None):
if timing is not None:
warn('Option timing of method render_stats is deprecated.'
' There is no more timing feature.')
out = ['------------ Stats: ------------']
out.append('Counters:')
# Process counters
items = sorted(self.stat.counters.items(),
key=lambda x: x[0], reverse=True)
for item in items:
out.append(' %s: %s' % item)
out.append('')
out.append('Lists:')
# Process collections sorted by size desc
col_sizes = [(x, len(y)) for x, y in self.stat.collections.items()]
col_sizes = sorted(col_sizes, key=lambda x: x[1], reverse=True)
for col_size in col_sizes:
out.append(' %s: %d' % col_size)
out.append('')
# Process extra metrics
if 'download-size' in self.stat.counters:
out.append('Network download: %s' %
metric.format_traffic_value(
self.stat.counters['download-size']))
out.append('Queue size: %d' % self.task_queue.size()
if self.task_queue else 'NA')
out.append('Network streams: %d' % self.thread_number)
if self._started:
elapsed = time.time() - self._started
else:
elapsed = 0
hours, seconds = divmod(elapsed, 3600)
minutes, seconds = divmod(seconds, 60)
out.append('Time elapsed: %d:%d:%d (H:M:S)' % (
hours, minutes, seconds))
out.append('End time: %s' %
datetime.utcnow().strftime('%d %b %Y, %H:%M:%S UTC'))
return '\n'.join(out) + '\n'
def render_stats(self, timing=None):
if timing is not None:
warn('Option timing of method render_stats is deprecated.'
' There is no more timing feature.')
out = ['------------ Stats: ------------']
out.append('Counters:')
# Process counters
items = sorted(self.stat.counters.items(),
key=lambda x: x[0], reverse=True)
for item in items:
out.append(' %s: %s' % item)
out.append('')
out.append('Lists:')
# Process collections sorted by size desc
col_sizes = [(x, len(y)) for x, y in self.stat.collections.items()]
col_sizes = sorted(col_sizes, key=lambda x: x[1], reverse=True)
for col_size in col_sizes:
out.append(' %s: %d' % col_size)
out.append('')
# Process extra metrics
if 'download-size' in self.stat.counters:
out.append('Network download: %s' %
metric.format_traffic_value(
self.stat.counters['download-size']))
out.append('Queue size: %d' % self.task_queue.size()
if self.task_queue else 'NA')
out.append('Network streams: %d' % self.thread_number)
if self._started:
elapsed = time.time() - self._started
else:
elapsed = 0
hours, seconds = divmod(elapsed, 3600)
minutes, seconds = divmod(seconds, 60)
out.append('Time elapsed: %d:%d:%d (H:M:S)' % (
hours, minutes, seconds))
out.append('End time: %s' %
datetime.utcnow().strftime('%d %b %Y, %H:%M:%S UTC'))
return '\n'.join(out) + '\n'
def setup(self, **kwargs):
"""
Setting up Grab instance configuration.
"""
if 'hammer_mode' in kwargs:
warn('Option `hammer_mode` is deprecated. Grab does not '
'support hammer mode anymore.')
del kwargs['hammer_mode']
if 'hammer_timeouts' in kwargs:
warn('Option `hammer_timeouts` is deprecated. Grab does not '
'support hammer mode anymore.')
del kwargs['hammer_timeouts']
for key in kwargs:
if key not in self.config.keys():
raise error.GrabMisuseError('Unknown option: %s' % key)
if 'url' in kwargs:
if self.config.get('url'):
kwargs['url'] = self.make_url_absolute(kwargs['url'])
self.config.update(kwargs)
def setup(self, **kwargs):
"""
Setting up Grab instance configuration.
"""
if 'hammer_mode' in kwargs:
warn('Option `hammer_mode` is deprecated. Grab does not '
'support hammer mode anymore.')
del kwargs['hammer_mode']
if 'hammer_timeouts' in kwargs:
warn('Option `hammer_timeouts` is deprecated. Grab does not '
'support hammer mode anymore.')
del kwargs['hammer_timeouts']
for key in kwargs:
if key not in self.config.keys():
raise error.GrabMisuseError('Unknown option: %s' % key)
if 'url' in kwargs:
if self.config.get('url'):
kwargs['url'] = self.make_url_absolute(kwargs['url'])
self.config.update(kwargs)
def __init__(
self,
thread_number=None,
network_try_limit=None, task_try_limit=None,
request_pause=NULL,
priority_mode='random',
meta=None,
only_cache=False,
config=None,
args=None,
parser_requests_per_process=10000,
parser_pool_size=1,
http_api_port=None,
network_service='threaded',
grab_transport='pycurl',
# Deprecated
transport=None):
"""
Arguments:
* thread-number - Number of concurrent network streams
* network_try_limit - How many times try to send request
again if network error was occurred, use 0 to disable
* task_try_limit - Limit of tries to execute some task
this is not the same as network_try_limit
network try limit limits the number of tries which
are performed automatically in case of network timeout
of some other physical error
but task_try_limit limits the number of attempts which
are scheduled manually in the spider business logic
* priority_mode - could be "random" or "const"
* meta - arbitrary user data
* retry_rebuild_user_agent - generate new random user-agent for each
network request which is performed again due to network error
* args - command line arguments parsed with `setup_arg_parser` method
"""
self.fatal_error_queue = Queue()
self.task_queue_parameters = None
self.http_api_port = http_api_port
self._started = None
assert grab_transport in ('pycurl', 'urllib3')
self.grab_transport_name = grab_transport
self.parser_requests_per_process = parser_requests_per_process
self.stat = Stat()
self.task_queue = None
if args is None:
self.args = {}
else:
self.args = args
if config is not None:
self.config = config
else:
self.config = {}
if meta:
self.meta = meta
else:
self.meta = {}
self.thread_number = (
thread_number or
int(self.config.get('thread_number',
DEFAULT_NETWORK_STREAM_NUMBER)))
self.task_try_limit = (
task_try_limit or
int(self.config.get('task_try_limit', DEFAULT_TASK_TRY_LIMIT)))
self.network_try_limit = (
network_try_limit or
int(self.config.get('network_try_limit',
DEFAULT_NETWORK_TRY_LIMIT)))
self._grab_config = {}
if priority_mode not in ['random', 'const']:
raise SpiderMisuseError('Value of priority_mode option should be '
'"random" or "const"')
else:
self.priority_mode = priority_mode
self.only_cache = only_cache
self.work_allowed = True
if request_pause is not NULL:
warn('Option `request_pause` is deprecated and is not '
'supported anymore')
self.proxylist_enabled = None
self.proxylist = None
self.proxy = None
self.proxy_auto_change = False
self.interrupted = False
self.cache_reader_service = None
self.cache_writer_service = None
self.parser_pool_size = parser_pool_size
self.parser_service = ParserService(
spider=self,
pool_size=self.parser_pool_size,
)
if transport is not None:
warn('The "transport" argument of Spider constructor is'
' deprecated. Use "network_service" argument.')
network_service = transport
assert network_service in ('threaded',)
if network_service == 'threaded':
# pylint: disable=no-name-in-module, import-error
from grab.spider.network_service.threaded import (
NetworkServiceThreaded
)
self.network_service = NetworkServiceThreaded(
self, self.thread_number
)
self.task_dispatcher = TaskDispatcherService(self)
if self.http_api_port:
self.http_api_service = HttpApiService(self)
else:
self.http_api_service = None
self.task_generator_service = TaskGeneratorService(
self.task_generator(), self,
)
def __init__(
self,
thread_number=None,
network_try_limit=None, task_try_limit=None,
request_pause=NULL,
priority_mode='random',
meta=None,
config=None,
args=None,
parser_requests_per_process=10000,
parser_pool_size=1,
http_api_port=None,
network_service='threaded',
grab_transport='pycurl',
# Deprecated
transport=None,
only_cache=False,
):
"""
Arguments:
* thread-number - Number of concurrent network streams
* network_try_limit - How many times try to send request
again if network error was occurred, use 0 to disable
* task_try_limit - Limit of tries to execute some task
this is not the same as network_try_limit
network try limit limits the number of tries which
are performed automatically in case of network timeout
of some other physical error
but task_try_limit limits the number of attempts which
are scheduled manually in the spider business logic
* priority_mode - could be "random" or "const"
* meta - arbitrary user data
* retry_rebuild_user_agent - generate new random user-agent for each
network request which is performed again due to network error
* args - command line arguments parsed with `setup_arg_parser` method
"""
self.fatal_error_queue = Queue()
self.task_queue_parameters = None
self.http_api_port = http_api_port
self._started = None
assert grab_transport in ('pycurl', 'urllib3')
self.grab_transport_name = grab_transport
self.parser_requests_per_process = parser_requests_per_process
self.stat = Stat()
self.task_queue = None
if args is None:
self.args = {}
else:
self.args = args
if config is not None:
self.config = config
else:
self.config = {}
if meta:
self.meta = meta
else:
self.meta = {}
self.thread_number = (
thread_number or
int(self.config.get('thread_number',
DEFAULT_NETWORK_STREAM_NUMBER)))
self.task_try_limit = (
task_try_limit or
int(self.config.get('task_try_limit', DEFAULT_TASK_TRY_LIMIT)))
self.network_try_limit = (
network_try_limit or
int(self.config.get('network_try_limit',
DEFAULT_NETWORK_TRY_LIMIT)))
self._grab_config = {}
if priority_mode not in ['random', 'const']:
raise SpiderMisuseError('Value of priority_mode option should be '
'"random" or "const"')
else:
self.priority_mode = priority_mode
if only_cache:
raise_feature_is_deprecated('Cache feature')
self.work_allowed = True
if request_pause is not NULL:
warn('Option `request_pause` is deprecated and is not '
'supported anymore')
self.proxylist_enabled = None
self.proxylist = None
self.proxy = None
self.proxy_auto_change = False
self.interrupted = False
self.parser_pool_size = parser_pool_size
self.parser_service = ParserService(
spider=self,
pool_size=self.parser_pool_size,
)
if transport is not None:
warn('The "transport" argument of Spider constructor is'
' deprecated. Use "network_service" argument.')
network_service = transport
assert network_service in ('threaded',)
if network_service == 'threaded':
# pylint: disable=no-name-in-module, import-error
from grab.spider.network_service.threaded import (
NetworkServiceThreaded
)
self.network_service = NetworkServiceThreaded(
self, self.thread_number
)
self.task_dispatcher = TaskDispatcherService(self)
if self.http_api_port:
self.http_api_service = HttpApiService(self)
else:
self.http_api_service = None
self.task_generator_service = TaskGeneratorService(
self.task_generator(), self,
)
def __init__(self, thread_number=None,
network_try_limit=None, task_try_limit=None,
request_pause=NULL,
priority_mode='random',
meta=None,
only_cache=False,
config=None,
slave=None,
args=None,
# New options start here
taskq=None,
# MP:
network_result_queue=None,
parser_result_queue=None,
is_parser_idle=None,
shutdown_event=None,
mp_mode=False,
parser_pool_size=None,
parser_mode=False,
parser_requests_per_process=10000,
# http api
http_api_port=None,
transport='multicurl',
grab_transport='pycurl',
):
"""
Arguments:
* thread-number - Number of concurrent network streams
* network_try_limit - How many times try to send request
again if network error was occurred, use 0 to disable
* network_try_limit - Limit of tries to execute some task
this is not the same as network_try_limit
network try limit limits the number of tries which
are performed automatically in case of network timeout
of some other physical error
but task_try_limit limits the number of attempts which
are scheduled manually in the spider business logic
* priority_mode - could be "random" or "const"
* meta - arbitrary user data
* retry_rebuild_user_agent - generate new random user-agent for each
network request which is performed again due to network error
* args - command line arguments parsed with `setup_arg_parser` method
New options:
* taskq=None,
* newtork_response_queue=None,
"""
if slave is not None:
raise SpiderConfigurtionError(
'Slave mode is not supported anymore. '
'Use `mp_mode=True` option to run multiple HTML'
' parser processes.')
# API:
self.http_api_port = http_api_port
assert transport in ('multicurl', 'threaded')
self.transport_name = transport
assert grab_transport in ('pycurl', 'urllib3')
self.grab_transport_name = grab_transport
# MP:
self.mp_mode = mp_mode
if self.mp_mode:
from multiprocessing import Process, Event, Queue
else:
from multiprocessing.dummy import Process, Event, Queue
if network_result_queue is not None:
self.network_result_queue = network_result_queue
else:
self.network_result_queue = Queue()
self.parser_result_queue = parser_result_queue
self.is_parser_idle = is_parser_idle
if shutdown_event is not None:
self.shutdown_event = shutdown_event
else:
self.shutdown_event = Event()
if not self.mp_mode and parser_pool_size and parser_pool_size > 1:
raise SpiderConfigurationError(
'Parser pool size could be only 1 in '
'non-multiprocess mode')
self.parser_pool_size = parser_pool_size
self.parser_mode = parser_mode
self.parser_requests_per_process = parser_requests_per_process
self.stat = Stat()
self.timer = Timer()
self.task_queue = taskq
if args is None:
self.args = {}
else:
self.args = args
if config is not None:
self.config = config
else:
self.config = {}
if meta:
self.meta = meta
else:
self.meta = {}
self.thread_number = (
thread_number or
int(self.config.get('thread_number',
DEFAULT_NETWORK_STREAM_NUMBER)))
self.task_try_limit = (
task_try_limit or
int(self.config.get('task_try_limit', DEFAULT_TASK_TRY_LIMIT)))
self.network_try_limit = (
network_try_limit or
int(self.config.get('network_try_limit',
DEFAULT_NETWORK_TRY_LIMIT)))
self._grab_config = {}
if priority_mode not in ['random', 'const']:
raise SpiderMisuseError('Value of priority_mode option should be '
'"random" or "const"')
else:
self.priority_mode = priority_mode
self.only_cache = only_cache
self.cache_pipeline = None
self.work_allowed = True
if request_pause is not NULL:
warn('Option `request_pause` is deprecated and is not '
'supported anymore')
self.proxylist_enabled = None
self.proxylist = None
self.proxy = None
self.proxy_auto_change = False
self.interrupted = False
def valid_response_code(self, code, task):
warn('Method `Spider::valid_response_code` is deprecated. '
'Use `Spider::is_valid_network_response_code` method or '
'`Spider::is_valid_network_result` method.')
return self.is_valid_network_response_code(code, task)
def set_grab_config(self, val):
warn('Using `grab_config` attribute is deprecated. Override '
'`create_grab_instance method instead.')
self._grab_config = val
def __init__(self, *args, **kwargs):
warn('You are using XpathSelector from deprecated `grab.selector` '
'package. Please, switch to `selection` package.')
super(XpathSelector, self).__init__(*args, **kwargs)
def items(self):
warn('Attribute `Spider::items` is deprecated. '
'Use `Spider::stat.collections` attribute instead.')
return self.stat.collections
def inc_count(self, key, count=1):
warn('Method `Spider::inc_count` is deprecated. '
'Use `Spider::stat.inc` method instead.')
self.stat.inc(key, count)
def test_warn(self):
out = StringIO()
with mock.patch('sys.stderr', out):
warn('abc')
self.assertTrue('GrabDeprecationWarning: abc' in out.getvalue())
def form(self):
warn('The `Grab.form` attribute is deprecated. '
'Use `Grab.doc.form` instead.')
return self.doc.form
from grab.selector.selector import * # noqa
from grab.util.warning import warn
warn("Module `grab.selector` is deprecated. Use `selection` package.")
def __init__(self, thread_number=None,
network_try_limit=None, task_try_limit=None,
request_pause=NULL,
priority_mode='random',
meta=None,
only_cache=False,
config=None,
slave=None,
args=None,
# New options start here
taskq=None,
# MP:
network_result_queue=None,
parser_result_queue=None,
is_parser_idle=None,
shutdown_event=None,
mp_mode=False,
parser_pool_size=None,
parser_mode=False,
parser_requests_per_process=10000,
# http api
http_api_port=None,
):
"""
Arguments:
* thread-number - Number of concurrent network streams
* network_try_limit - How many times try to send request
again if network error was occurred, use 0 to disable
* network_try_limit - Limit of tries to execute some task
this is not the same as network_try_limit
network try limit limits the number of tries which
are performed automatically in case of network timeout
of some other physical error
but task_try_limit limits the number of attempts which
are scheduled manually in the spider business logic
* priority_mode - could be "random" or "const"
* meta - arbitrary user data
* retry_rebuild_user_agent - generate new random user-agent for each
network request which is performed again due to network error
* args - command line arguments parsed with `setup_arg_parser` method
New options:
* taskq=None,
* newtork_response_queue=None,
"""
if slave is not None:
raise SpiderConfigurtionError(
'Slave mode is not supported anymore. '
'Use `mp_mode=True` option to run multiple HTML'
' parser processes.')
# API:
self.http_api_port = http_api_port
# MP:
self.mp_mode = mp_mode
if self.mp_mode:
from multiprocessing import Process, Event, Queue
else:
from multiprocessing.dummy import Process, Event, Queue
if network_result_queue is not None:
self.network_result_queue = network_result_queue
else:
self.network_result_queue = Queue()
self.parser_result_queue = parser_result_queue
self.is_parser_idle = is_parser_idle
if shutdown_event is not None:
self.shutdown_event = shutdown_event
else:
self.shutdown_event = Event()
if not self.mp_mode and parser_pool_size and parser_pool_size > 1:
raise SpiderConfigurationError(
'Parser pool size could be only 1 in '
'non-multiprocess mode')
self.parser_pool_size = parser_pool_size
self.parser_mode = parser_mode
self.parser_requests_per_process = parser_requests_per_process
self.stat = Stat()
self.timer = Timer()
self.task_queue = taskq
if args is None:
self.args = {}
else:
self.args = args
if config is not None:
self.config = config
else:
self.config = {}
if meta:
self.meta = meta
else:
self.meta = {}
self.thread_number = (
thread_number or
int(self.config.get('thread_number',
DEFAULT_NETWORK_STREAM_NUMBER)))
self.task_try_limit = (
task_try_limit or
int(self.config.get('task_try_limit', DEFAULT_TASK_TRY_LIMIT)))
self.network_try_limit = (
network_try_limit or
int(self.config.get('network_try_limit',
DEFAULT_NETWORK_TRY_LIMIT)))
self._grab_config = {}
if priority_mode not in ['random', 'const']:
raise SpiderMisuseError('Value of priority_mode option should be '
'"random" or "const"')
else:
self.priority_mode = priority_mode
self.only_cache = only_cache
self.cache_pipeline = None
self.work_allowed = True
if request_pause is not NULL:
warn('Option `request_pause` is deprecated and is not '
'supported anymore')
self.proxylist_enabled = None
self.proxylist = None
self.proxy = None
self.proxy_auto_change = False
self.interrupted = False
def add_item(self, list_name, item):
warn('Method `Spider::add_item` is deprecated. '
'Use `Spider::stat.collect` method instead.')
self.stat.collect(list_name, item)
def test_warn(self):
out = StringIO()
with mock.patch('sys.stderr', out):
warn('abc')
self.assertTrue('GrabDeprecationWarning: abc' in out.getvalue())
def stop_timer(self, key):
warn('Method `Spider::stop_timer` is deprecated. '
'Use `Spider::timer.stop` method instead.')
self.timer.stop(key)
def setup_spider_config(cls, config):
warn('Method `Spider::setup_spider_config` is deprecated. '
'Use `Spider::update_spider_config` method.')
cls.update_spider_config(config)
def counters(self):
warn('Attribute `Spider::counters` is deprecated. '
'Use `Spider::stat.counters` attribute instead.')
return self.stat.counters
def __init__(self, name=None, url=None, grab=None, grab_config=None,
priority=None, priority_set_explicitly=True,
network_try_count=0, task_try_count=1,
disable_cache=False, refresh_cache=False,
valid_status=None, use_proxylist=True,
cache_timeout=None, delay=None,
raw=False, callback=None,
fallback_name=None,
**kwargs):
"""
Create `Task` object.
If more than one of url, grab and grab_config options are non-empty
then they processed in following order:
* grab overwrite grab_config
* grab_config overwrite url
Args:
:param name: name of the task. After successful network operation
task's result will be passed to `task_<name>` method.
:param url: URL of network document. Any task requires `url` or
`grab` option to be specified.
:param grab: configured `Grab` instance. You can use that option in
case when `url` option is not enough. Do not forget to
configure `url` option of `Grab` instance because in this case
the `url` option of `Task` constructor will be overwritten
with `grab.config['url']`.
:param priority: - priority of the Task. Tasks with lower priority
will be processed earlier. By default each new task is assigned
with random priority from (80, 100) range.
:param priority_set_explicitly: - internal flag which tells if that
task priority was assigned manually or generated by spider
according to priority generation rules.
:param network_try_count: you'll probably will not need to use it.
It is used internally to control how many times this task was
restarted due to network errors. The `Spider` instance has
`network_try_limit` option. When `network_try_count` attribute
of the task exceeds the `network_try_limit` attribute then
processing of the task is abandoned.
:param task_try_count: the as `network_try_count` but it increased
only then you use `clone` method. Also you can set it manually.
It is useful if you want to restart the task after it was
cancelled due to multiple network errors. As you might guessed
there is `task_try_limit` option in `Spider` instance. Both
options `network_try_count` and `network_try_limit` guarantee
you that you'll not get infinite loop of restarting some task.
:param disable_cache: if `True` disable cache subsystem.
The document will be fetched from the Network and it will not
be saved to cache.
:param refresh_cache: if `True` the document will be fetched from
the Network and saved to cache.
:param valid_status: extra status codes which counts as valid
:param use_proxylist: it means to use proxylist which was
configured via `setup_proxylist` method of spider
:param delay: if specified tells the spider to schedule the task
and execute it after `delay` seconds
:param raw: if `raw` is True then the network response is
forwarding to the corresponding handler without any check of
HTTP status code of network error, if `raw` is False (by
default) then failed response is putting back to task queue or
if tries limit is reached then the processing of this request
is finished.
:param callback: if you pass some function in `callback` option
then the network response will be passed to this callback and
the usual 'task_*' handler will be ignored and no error will be
raised if such 'task_*' handler does not exist.
:param fallback_name: the name of method that is called when spider
gives up to do the task (due to multiple network errors)
Any non-standard named arguments passed to `Task` constructor will
be saved as attributes of the object. You can get their values
later as attributes or with `get` method which allows to use
default value if attribute does not exist.
"""
if name == 'generator':
# The name "generator" is restricted because
# `task_generator` handler could not be created because
# this name is already used for special method which
# generates new tasks
raise SpiderMisuseError('Task name could not be "generator"')
self.name = name
if url is None and grab is None and grab_config is None:
raise SpiderMisuseError('Either url, grab or grab_config argument '
'of Task constructor should not be None')
if url is not None and grab is not None:
raise SpiderMisuseError('Options url and grab could not be used '
'together')
if url is not None and grab_config is not None:
raise SpiderMisuseError('Options url and grab_config could not be '
'used together')
if grab is not None and grab_config is not None:
raise SpiderMisuseError(
'Options grab and grab_config could not be used together')
if grab:
self.setup_grab_config(grab.dump_config())
elif grab_config:
self.setup_grab_config(grab_config)
else:
self.grab_config = None
self.url = url
if valid_status is None:
self.valid_status = []
else:
self.valid_status = valid_status
self.process_delay_option(delay)
self.cache_timeout = cache_timeout
if cache_timeout is not None:
warn(
'Option `cache_timeout` is deprecated and'
' is not supported anymore'
)
self.fallback_name = fallback_name
self.priority_set_explicitly = priority_set_explicitly
self.priority = priority
self.network_try_count = network_try_count
self.task_try_count = task_try_count
self.disable_cache = disable_cache
self.refresh_cache = refresh_cache
self.use_proxylist = use_proxylist
self.raw = raw
self.callback = callback
self.coroutines_stack = []
for key, value in kwargs.items():
setattr(self, key, value)
def get_grab_config(self):
warn('Using `grab_config` attribute is deprecated. Override '
'`create_grab_instance method instead.')
return self._grab_config
def __init__(self,
name=None,
url=None,
grab=None,
grab_config=None,
priority=None,
priority_set_explicitly=True,
network_try_count=0,
task_try_count=1,
disable_cache=False,
refresh_cache=False,
valid_status=None,
use_proxylist=True,
cache_timeout=None,
delay=None,
raw=False,
callback=None,
fallback_name=None,
**kwargs):
"""
Create `Task` object.
If more than one of url, grab and grab_config options are non-empty
then they processed in following order:
* grab overwrite grab_config
* grab_config overwrite url
Args:
:param name: name of the task. After successful network operation
task's result will be passed to `task_<name>` method.
:param url: URL of network document. Any task requires `url` or
`grab` option to be specified.
:param grab: configured `Grab` instance. You can use that option in
case when `url` option is not enough. Do not forget to
configure `url` option of `Grab` instance because in this case
the `url` option of `Task` constructor will be overwritten
with `grab.config['url']`.
:param priority: - priority of the Task. Tasks with lower priority
will be processed earlier. By default each new task is assigned
with random priority from (80, 100) range.
:param priority_set_explicitly: - internal flag which tells if that
task priority was assigned manually or generated by spider
according to priority generation rules.
:param network_try_count: you'll probably will not need to use it.
It is used internally to control how many times this task was
restarted due to network errors. The `Spider` instance has
`network_try_limit` option. When `network_try_count` attribute
of the task exceeds the `network_try_limit` attribute then
processing of the task is abandoned.
:param task_try_count: the as `network_try_count` but it increased
only then you use `clone` method. Also you can set it manually.
It is useful if you want to restart the task after it was
cancelled due to multiple network errors. As you might guessed
there is `task_try_limit` option in `Spider` instance. Both
options `network_try_count` and `network_try_limit` guarantee
you that you'll not get infinite loop of restarting some task.
:param disable_cache: if `True` disable cache subsystem.
The document will be fetched from the Network and it will not
be saved to cache.
:param refresh_cache: if `True` the document will be fetched from
the Network and saved to cache.
:param valid_status: extra status codes which counts as valid
:param use_proxylist: it means to use proxylist which was
configured via `setup_proxylist` method of spider
:param delay: if specified tells the spider to schedule the task
and execute it after `delay` seconds
:param raw: if `raw` is True then the network response is
forwarding to the corresponding handler without any check of
HTTP status code of network error, if `raw` is False (by
default) then failed response is putting back to task queue or
if tries limit is reached then the processing of this request
is finished.
:param callback: if you pass some function in `callback` option
then the network response will be passed to this callback and
the usual 'task_*' handler will be ignored and no error will be
raised if such 'task_*' handler does not exist.
:param fallback_name: the name of method that is called when spider
gives up to do the task (due to multiple network errors)
Any non-standard named arguments passed to `Task` constructor will
be saved as attributes of the object. You can get their values
later as attributes or with `get` method which allows to use
default value if attribute does not exist.
"""
if name == 'generator':
# The name "generator" is restricted because
# `task_generator` handler could not be created because
# this name is already used for special method which
# generates new tasks
raise SpiderMisuseError('Task name could not be "generator"')
self.name = name
if url is None and grab is None and grab_config is None:
raise SpiderMisuseError('Either url, grab or grab_config argument '
'of Task constructor should not be None')
if url is not None and grab is not None:
raise SpiderMisuseError('Options url and grab could not be used '
'together')
if url is not None and grab_config is not None:
raise SpiderMisuseError('Options url and grab_config could not be '
'used together')
if grab is not None and grab_config is not None:
raise SpiderMisuseError(
'Options grab and grab_config could not be used together')
if grab:
self.setup_grab_config(grab.dump_config())
elif grab_config:
self.setup_grab_config(grab_config)
else:
self.grab_config = None
self.url = url
if valid_status is None:
self.valid_status = []
else:
self.valid_status = valid_status
self.process_delay_option(delay)
self.cache_timeout = cache_timeout
if cache_timeout is not None:
warn('Option `cache_timeout` is deprecated and'
' is not supported anymore')
self.fallback_name = fallback_name
self.priority_set_explicitly = priority_set_explicitly
self.priority = priority
self.network_try_count = network_try_count
self.task_try_count = task_try_count
self.disable_cache = disable_cache
self.refresh_cache = refresh_cache
self.use_proxylist = use_proxylist
self.raw = raw
self.callback = callback
self.coroutines_stack = []
for key, value in kwargs.items():
setattr(self, key, value)
def setup_grab(self, **kwargs):
warn('Method `Spider::setup_grab` is deprecated. '
'Define `Spider::create_grab_instance` or '
'Spider::update_grab_instance` methods in your '
'Spider sub-class.')
self.grab_config.update(**kwargs)
def _get_response(self):
warn('The `Grab.response` attribute is deprecated. '
'Use `Grab.doc` instead.')
return self.doc
def taskq(self):
warn('Attribute `Spider::taskq` is deprecated. '
'Use `Spider::task_queue` attribute.')
return self.task_queue
def load_cookies(self, path, file_required=None):
if file_required is not None:
warn('The option `file_required` is no longer supported')
self.cookies.load_from_file(path) # pylint: disable=no-member
def append(self, key, val):
warn('Method `Stat::append` is deprecated. '
'Use `Stat::collect` method instead.')
self.collect(key, val)
def form(self):
warn('The `Grab.form` attribute is deprecated. '
'Use `Grab.doc.form` instead.')
return self.doc.form
def time(self):
warn('Attribute `Document.time` is deprecated. '
'Use `Document.total_time` instead.')
return self.total_time
from grab.selector.selector import * # noqa
from grab.util.warning import warn
warn('Module `grab.selector` is deprecated. Use `selection` package.')
def append(self, key, val):
warn('Method `Stat::append` is deprecated. '
'Use `Stat::collect` method instead.')
self.collect(key, val)
def time(self):
warn('Attribute `Document.time` is deprecated. '
'Use `Document.total_time` instead.')
return self.total_time