Cherry Py Auto Download File

I'm currently building cherry py app for my projects and at certain function I need auto starting download a file. After zip file finish generating, I want to start downloading to

Solution 1:

Just create a zip archive in memory and then return it using file_generator() helper function from cherrypy.lib. You may as well yield HTTP response to enable streaming capabilities (keep in mind to set HTTP headers prior to doing that). I wrote a simple example (based on your snippet) for you just returning a whole buffered zip archive.

from io import BytesIO

import cherrypy
from cherrypy.lib import file_generator


classGenerateZip:
    @cherrypy.exposedefarchive(self, filename):
        zip_archive = BytesIO()
        with closed(ZipFile(zip_archive, "w", ZIP_DEFLATED)) as z:
            for root, dirs, files in os.walk(basedir):
                #NOTE: ignore empty directoriesfor fn in files:
                    absfn = os.path.join(root, fn)
                    zfn = absfn[len(basedir)+len(os.sep):] #XXX: relative path
                    z.write(absfn, zfn)


        cherrypy.response.headers['Content-Type'] = (
            'application/zip'
        )
        cherrypy.response.headers['Content-Disposition'] = (
            'attachment; filename={fname}.zip'.format(
                fname=filename
            )
        )

        return file_generator(zip_archive)

N.B. I didn't test this specific piece of code, but the general idea is correct.