python - Scrapy image download how to use custom filename

Question

For my scrapy project I'm currently using the ImagesPipeline. The downloaded images are stored with a SHA1 hash of their URLs as the file names.

How can I store the files using my own custom file names instead?

What if my custom file name needs to contain another scraped field from the same item? e.g. use the item['desc'] and the filename for the image with item['image_url']. If I understand correctly, that would involve somehow accessing the other item fields from the Image Pipeline.

Any help will be appreciated.

Answer 1

This is just actualization of the answer for scrapy 0.24 (EDITED), where the image_key() is deprecated

class MyImagesPipeline(ImagesPipeline):

    #Name download version
    def file_path(self, request, response=None, info=None):
        #item=request.meta['item'] # Like this you can use all from item, not just url.
        image_guid = request.url.split('/')[-1]
        return 'full/%s' % (image_guid)

    #Name thumbnail version
    def thumb_path(self, request, thumb_id, response=None, info=None):
        image_guid = thumb_id + response.url.split('/')[-1]
        return 'thumbs/%s/%s.jpg' % (thumb_id, image_guid)

    def get_media_requests(self, item, info):
        #yield Request(item['images']) # Adding meta. I don't know, how to put it in one line :-)
        for image in item['images']:
            yield Request(image)