How do I set response headers in Flask?

Question

This is my code:

@app.route(\'/hello\', methods=[\"POST\"])
def hello():
    resp = make_response()
    resp.headers[\'Access-Control-Allow-Origin\'] = \'*\'         


        

Answer 1

Use make_response of Flask something like

@app.route("/")
def home():
    resp = make_response("hello") #here you could use make_response(render_template(...)) too
    resp.headers['Access-Control-Allow-Origin'] = '*'
    return resp

From flask docs,

flask.make_response(*args)

Sometimes it is necessary to set additional headers in a view. Because views do not have to return response objects but can return a value that is converted into a response object by Flask itself, it becomes tricky to add headers to it. This function can be called instead of using a return and you will get a response object which you can use to attach headers.