Python Flask downloading a file returns 0 bytes

Question

Here is the code my flask server is running:

from flask import Flask, make_response
import os

app = Flask(__name__)

@app.route(\"/\")
def index():
                 


        

Answer 1

As danny wrote, you don't provide any content in your response, that's why you get 0 bytes. There is however an easy function send_file in Flask to return file content:

from flask import send_file

@app.route("/")
def getFile(file_name):
    return send_file(file_name, as_attachment=True)

Note that the file_name is relative to application root path (app.root_path) in this case.