前言

需求：将请求不是200的url抓下来保存到本地记录
方法：在scrapy的middlewares中创建一个中间件，对response.status状态不为200的url收集下来

middleware中设置方法

class GetFailedUrl(object):

    def process_response(self,response,request,spider):
        
        if response.status != 200:

            name  = time.strftime('%Y-%m-%d %H:%M',time.localtime())

            with open (str(name),'w+') as file:
                
                file.write(response.url)

                return response
        else:
            return response