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

file_open_view.py

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

class YourFileOpenView(FileOpenView):
    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 FileOpenView(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
        try:
            stream = open(os.path.join(self.folder_path, self.file_name), 'rb')
            requested_file = FileResponse(
                stream,
                content_type=self.content_type_value
            )
            return requested_file
        except Exception:
            raise Http404