Flask broken pipe with requests

I'd like to send a local REST request in a flask app, like this: from flask import Flask, url_for, request import requests app = Flask(__name__) @app.route("/<name>/hi", methods=["POST"]) def hi_person(name): form = {"name": name} return requests.post(url_for("hi", _external=True), data=form) @app.route("/hi", methods=["POST"]) def hi(): return 'Hi, %s!' % request.form["name"] Sending `curl -X POST http://localhost:5000/john/hi` causes the entire flask app to freeze. When I send a kill signal, I get a broken pipe error. Is there a way to prevent flask from freezing here?