Scrapyd 重试,如果 Errback 在扭曲的 deferreds / 无法打开 CONNECT 隧道错误

Scrapyd Retry if Errback in twisted deferreds / Could not open CONNECT tunnel Error

我正在使用 Scrapy 中的代理循环,有时一些代理会出错,这会阻止我的蜘蛛.. 错误是 "Could not open CONNECT tunnel" 如果出现此错误,我该如何更改代码以使用另一个代理重试?

这里是需要修改的代码: https://github.com/scrapy/scrapy/blob/master/scrapy/core/downloader/handlers/http11.py

像这样:

from scrapy.core.downloader.handlers.http11 import TunnelError


class RetryMiddleware(RetryMiddleware):
    def process_exception(self, request, exception, spider):
        if ( isinstance(exception, self.EXCEPTIONS_TO_RETRY) or isinstance(exception, TunnelError) ) \
                and 'dont_retry' not in request.meta:
            return self._retry(request, exception, spider)

在settings.py中:

DOWNLOADER_MIDDLEWARES = { 
   'myproject.myretry.RetryMiddleware': 200,
   'scrapy.contrib.downloadermiddleware.retry.RetryMiddleware': None
}