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If you are using Scrapy 1.8 or a lower version, and upgrading to Scrapy 2.5.1 is not an option, you may upgrade to Scrapy 1.8.1 instead. If you cannot upgrade, set your HTTP authentication credentials on a per-request basis, using for example the `w3lib.http.basic_auth_header` function to convert your credentials into a value that you can assign to the `Authorization` header of your request, instead of defining your credentials globally using `HttpAuthMiddleware`."},{"lang":"es","value":"Scrapy es un marco de trabajo de alto nivel para el rastreo de la web y el scraping para Python. Si usa \"HttpAuthMiddleware\" (es decir, los atributos de araña \"http_user\" y \"http_pass\") para la autenticación HTTP, todas las peticiones expondrán sus credenciales al objetivo de la petición. 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