Source code for scrapy.spidermiddlewares.httperror

"""
HttpError Spider Middleware

See documentation in docs/topics/spider-middleware.rst
"""
import logging

from scrapy.exceptions import IgnoreRequest

logger = logging.getLogger(__name__)


class HttpError(IgnoreRequest):
    """A non-200 response was filtered"""

    def __init__(self, response, *args, **kwargs):
        self.response = response
        super().__init__(*args, **kwargs)


[docs]class HttpErrorMiddleware: @classmethod def from_crawler(cls, crawler): return cls(crawler.settings) def __init__(self, settings): self.handle_httpstatus_all = settings.getbool("HTTPERROR_ALLOW_ALL") self.handle_httpstatus_list = settings.getlist("HTTPERROR_ALLOWED_CODES") def process_spider_input(self, response, spider): if 200 <= response.status < 300: # common case return meta = response.meta if meta.get("handle_httpstatus_all", False): return if "handle_httpstatus_list" in meta: allowed_statuses = meta["handle_httpstatus_list"] elif self.handle_httpstatus_all: return else: allowed_statuses = getattr( spider, "handle_httpstatus_list", self.handle_httpstatus_list ) if response.status in allowed_statuses: return raise HttpError(response, "Ignoring non-200 response") def process_spider_exception(self, response, exception, spider): if isinstance(exception, HttpError): spider.crawler.stats.inc_value("httperror/response_ignored_count") spider.crawler.stats.inc_value( f"httperror/response_ignored_status_count/{response.status}" ) logger.info( "Ignoring response %(response)r: HTTP status code is not handled or not allowed", {"response": response}, extra={"spider": spider}, ) return []