Use scrapy.utils.request.fingerprint

[DharmeshPandav]

#310

[Gallaecio]

While this removes the warning, it is a backward incompatible change (it removes a public function), and is not the ideal way to address this.

The ideal way would be to provide a new fingerprinting class that users can assign to the new REQUEST_FINGERPRINTER_CLASS Scrapy setting. See Writing your own request fingerprinter for details.

If we provide such a class, we can replace steps 4 and 5 of the scrapy-splash configuration, and deprecate (not remove, otherwise we break backward compatibility) those 2 custom components provided in scrapy-splash, as well as the fingerprint function that you renamed and reimplemented here.