A "django" class based view to "download file" from server

file_download_view.py

"""
How to use this view ?
----------------------

class YourFileDownloadView(FileDownloadView):
    folder_path = 'path of the folder where the file is'
    file_name = 'name of the file to be downloaded'
    content_type_value = 'content type used for the format of `file_name`'
"""

from django.conf import settings
from django.http import Http404, HttpResponse


class FileDownloadView(View):
    # Set FILE_STORAGE_PATH value in settings.py
    folder_path = settings.FILE_STORAGE_PATH
    # Here set the name of the file with extension
    file_name = ''
    # Set the content type value
    content_type_value = 'text/plain'

    def get(self, request, file_name):
        self.file_name = file_name
        file_path = os.path.join(self.folder_path, self.file_name)
        if os.path.exists(file_path):
            with open(file_path, 'rb') as fh:
                response = HttpResponse(
                    fh.read(),
                    content_type=self.content_type_value
                )
                response['Content-Disposition'] = 'inline; filename=' + os.path.basename(file_path)
            return response
        else:
            raise Http404

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