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"""Download handlers for http and https schemes
"""
from scrapy.utils.misc import create_instance, load_object
from scrapy.utils.python import to_unicode
class HTTP10DownloadHandler:
lazy = False
def __init__(self, settings, crawler=None):
self.HTTPClientFactory = load_object(settings['DOWNLOADER_HTTPCLIENTFACTORY'])
self.ClientContextFactory = load_object(settings['DOWNLOADER_CLIENTCONTEXTFACTORY'])
self._settings = settings
self._crawler = crawler
@classmethod
def from_crawler(cls, crawler):
return cls(crawler.settings, crawler)
def download_request(self, request, spider):
"""Return a deferred for the HTTP download"""
factory = self.HTTPClientFactory(request)
self._connect(factory)
return factory.deferred
def _connect(self, factory):
from twisted.internet import reactor
host, port = to_unicode(factory.host), factory.port
if factory.scheme == b'https':
client_context_factory = create_instance(
objcls=self.ClientContextFactory,
settings=self._settings,
crawler=self._crawler,
)
return reactor.connectSSL(host, port, factory, client_context_factory)
else:
return reactor.connectTCP(host, port, factory)
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