PyCS/pycs/frontend/endpoints/data/GetFile.py

import os

from flask import abort
from flask import send_from_directory
from flask.views import View

from pycs.database.File import File


class GetFile(View):
    """
    returns binary file data
    """
    # pylint: disable=arguments-differ
    methods = ['GET']

    def dispatch_request(self, file_id: int):
        # get file from database
        file = File.query.get(file_id)

        if file is None:
            return abort(404)

        # get absolute path
        if os.path.isabs(file.path):
            abs_file_path = file.path
        else:
            abs_file_path = os.path.join(os.getcwd(), file.path)

        # return data
        file_directory, file_name = os.path.split(abs_file_path)
        return send_from_directory(file_directory, file_name)