Flask/Werkzeug how to attach HTTP content-length header to file download
I needed this also, but for every requests, so here's what I did (based on the doc) :
@app.after_requestdef after_request(response): response.headers.add('Access-Control-Allow-Origin', '*') return response
Since version 0.6 the canonical way to add headers to a response object is via the make_response method (see Flask docs).
def index(): response = make_response(render_template('index.html', foo=42)) response.headers['X-Parachutes'] = 'parachutes are cool' return response
I believe you'd do something like this (untested):
from flask import Responseresponse = Response()response.headers.add('content-length', str(os.path.getsize(FILE_LOCATION)))