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from scrapy.exceptions import NotConfigured
from scrapy.utils.request import request_httprepr
from scrapy.utils.response import response_httprepr
from scrapy.utils.python import global_object_name
class DownloaderStats(object):
def __init__(self, stats):
self.stats = stats
@classmethod
def from_crawler(cls, crawler):
if not crawler.settings.getbool('DOWNLOADER_STATS'):
raise NotConfigured
return cls(crawler.stats)
def process_request(self, request, spider):
self.stats.inc_value('downloader/request_count', spider=spider)
self.stats.inc_value('downloader/request_method_count/%s' % request.method, spider=spider)
reqlen = len(request_httprepr(request))
self.stats.inc_value('downloader/request_bytes', reqlen, spider=spider)
def process_response(self, request, response, spider):
self.stats.inc_value('downloader/response_count', spider=spider)
self.stats.inc_value('downloader/response_status_count/%s' % response.status, spider=spider)
reslen = len(response_httprepr(response))
self.stats.inc_value('downloader/response_bytes', reslen, spider=spider)
return response
def process_exception(self, request, exception, spider):
ex_class = global_object_name(exception.__class__)
self.stats.inc_value('downloader/exception_count', spider=spider)
self.stats.inc_value('downloader/exception_type_count/%s' % ex_class, spider=spider)
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