New in version 2.6.0: Cookie values that are bool, float or intĮncoding ( str) – the encoding of this request (defaults to 'utf-8'). None is passed as value, the HTTP header will not be sent at all. (for single valued headers) or lists (for multi-valued headers). Type of this argument, the final value stored will be a bytes object Ifīody is not given, an empty bytes object is stored.
If a string is passed, then it’s encoded asīytes using the encoding passed (which defaults to utf-8). Given, the dict passed in this parameter will be shallow copied.īody ( bytes or str) – the request body. Meta ( dict) – the initial values for the ta attribute. Method ( str) – the HTTP method of this request. Note that if exceptions are raised during processing, errback is called instead. If a Request doesn’t specify a callback, the spider’s See Passing additional data to callback functions below. Request (once it’s downloaded) as its first parameter. If the URL is invalid, a ValueError exception is raised.Ĭallback ( ) – the function that will be called with the response of this Represents an HTTP request, which is usually generated in a Spider andĮxecuted by the Downloader, thus generating a Response. Typically, Request objects are generated in the spiders and passĪcross the system until they reach the Downloader, which executes the requestĪnd returns a Response object which travels back to the spider thatīoth Request and Response classes have subclasses which addįunctionality not required in the base classes. Scrapy uses Request and Response objects for crawling web Downloading and processing files and images.Using your browser’s Developer Tools for scraping.Using om_response() to simulate a user login.Using FormRequest to send data via HTTP POST.Accessing additional data in errback functions.Using errbacks to catch exceptions in request processing.
Passing additional data to callback functions.
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