def __init__(self, settings, stats):
if not settings.getbool('HTTPCACHE_ENABLED'):
raise NotConfigured
self.policy = load_object(settings['HTTPCACHE_POLICY'])(settings)
self.storage = load_object(settings['HTTPCACHE_STORAGE'])(settings)
self.ignore_missing = settings.getbool('HTTPCACHE_IGNORE_MISSING')
self.stats = stats
def __init__(self):
self.classes = {}
self.mimetypes = MimeTypes()
mimedata = get_data('dscrapy', 'mime.types')
self.mimetypes.readfp(StringIO(mimedata))
for mimetype, cls in self.CLASSES.iteritems():
self.classes[mimetype] = load_object(cls)
def __init__(self, global_settings, global_signals):
self._handlers = {}
self._notconfigured = {}
handlers = global_settings.get('DOWNLOAD_HANDLERS_BASE')
handlers.update(global_settings.get('DOWNLOAD_HANDLERS', {}))
for scheme, clspath in handlers.iteritems():
# Allow to disable a handler just like any other
# component (extension, middleware, etc).
if clspath is None:
continue
cls = load_object(clspath)
try:
dh = cls(global_settings)
except NotConfigured as ex:
self._notconfigured[scheme] = str(ex)
else:
self._handlers[scheme] = dh
global_signals.connect(self._close, signals.engine_stopped)
def from_settings(cls, settings, signals=None, stats=None):
mwlist = cls._get_mwlist_from_settings(settings)
middlewares = []
for clspath in mwlist:
try:
mwcls = load_object(clspath)
if hasattr(mwcls, 'from_settings'):
mw = mwcls.from_settings(settings, signals, stats)
else:
mw = mwcls()
middlewares.append(mw)
except NotConfigured as e:
if e.args:
clsname = clspath.split('.')[-1]
log.msg(format="Disabled %(clsname)s: %(eargs)s",
level=log.WARNING, clsname=clsname, eargs=e.args[0])
enabled = [x.__class__.__name__ for x in middlewares]
log.msg(format="Enabled %(componentname)ss: %(enabledlist)s", level=log.INFO,
componentname=cls.component_name, enabledlist=', '.join(enabled))
return cls(*middlewares)
def __init__(self, settings):
self._pool = HTTPConnectionPool(reactor, persistent=True)
self._pool.maxPersistentPerHost = settings.getint('CONCURRENT_REQUESTS_PER_DOMAIN')
self._pool._factory.noisy = False
self._contextFactoryClass = load_object(settings['DOWNLOADER_CLIENTCONTEXTFACTORY'])
self._contextFactory = self._contextFactoryClass()
from dscrapy.downloader import Downloader
from dscrapy.http import Request
class DownloaderHandler:
implements(DownloaderService.Iface)
def __init__(self, downloader):
self.log = {}
self.downloader = downloader
def download(self, r):
print 'download( %s )' % (r.url)
request = Request(r.url)
self.downloader.fetch(request, None)
if __name__ == '__main__':
global_settings = DScrapySettings()
global_signals = SignalManager()
global_stats = load_object(global_settings['STATS_CLASS'])(global_settings)
downloader = Downloader(global_settings, global_signals, global_stats)
handler = DownloaderHandler(downloader)
processor = DownloaderService.Processor(handler)
pfactory = TBinaryProtocol.TBinaryProtocolFactory()
server = reactor.listenTCP(9090,
TTwisted.ThriftServerFactory(processor,
pfactory), interface="127.0.0.1")
reactor.run()
def __init__(self, settings):
self.HTTPClientFactory = load_object(settings['DOWNLOADER_HTTPCLIENTFACTORY'])
self.ClientContextFactory = load_object(settings['DOWNLOADER_CLIENTCONTEXTFACTORY'])
