Can I handle POST requests to Flask server in background thread?

Question

I know how to receive data from POST request in main thread:

from flask import Flask, render_template, request

app = Flask(__name__)

@app.route("/", methods=['POST'])
def parse_request():
    my_value = request.form.get('value_key')
    print(my_value)
    return render_template("index.html")

But can I do that in background thread to avoid blocking UI (rendering index.html)?

why dont u try it first ? then when u face an issue we can help u with that — leoOrion
– leoOrion, Commented Jul 23, 2021 at 9:54

Olasimbo · Accepted Answer · 2021-07-23 09:57:46Z

1

I'm assuming you want the html rendering and processing of your request to run concurrently. So, you can try threading in Python https://realpython.com/intro-to-python-threading/.

Let say you have a function that performs some processing on the request value, You can try this:

from threading import Thread
from flask import Flask, render_template, request


def process_value(val):
    output = val * 10
    return output

    
app = Flask(__name__)
    

@app.route("/", methods=['POST'])
def parse_request():
    my_value = request.form.get('value_key')
    req_thread = Thread(target=process_value(my_value))
    req_thread.start()
    print(my_value)
    return render_template("index.html")

Thread will allow process_value to run in the background

answered Jul 23, 2021 at 9:57

Olasimbo

1,0637 silver badges15 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Divelix Over a year ago

I just realized that Flask runs in background by default, and I can have multiple @app.route('/') methods that not necessarily should return something... But thank you for your answer anyway

Collectives™ on Stack Overflow

Can I handle POST requests to Flask server in background thread?

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related