python - Need to execute a function after returning the response in Flask

Question

For one request alone i need to execute a function after sending the response to the client. Because the function takes time and that ends up in connection timeout Socket error: [Errno 32] Broken pipe

Is there a way in Flask to execute function after returning the request

Answer 1

I will expose my solution.

You can use threads to compute anything after returned something in your function called by a flask route.

import time
from threading import Thread
from flask import request, Flask
app = Flask(__name__)


class Compute(Thread):
    def __init__(self, request):
        Thread.__init__(self)
        self.request = request

    def run(self):
        print("start")
        time.sleep(5)
        print(self.request)
        print("done")


@app.route('/myfunc', methods=["GET", "POST"])
def myfunc():
        thread_a = Compute(request.__copy__())
        thread_a.start()
        return "Processing in background", 200