Deploy Flask with Gevent Pywsgi Server using Multiprocessing

import sys
from gevent import server
from gevent.baseserver import _tcp_listener
from gevent import pywsgi
from gevent.monkey import patch_all; patch_all()
from multiprocessing import Process, current_process, cpu_count

def hello_world(env, start_response):
    if env['PATH_INFO'] == '/':
        start_response('200 OK', [('Content-Type', 'text/html')])
        return ["<b>hello world</b>"]
        start_response('404 Not Found', [('Content-Type', 'text/html')])
        return ['<h1>Not Found</h1>']

listener = _tcp_listener(('', 8001))

def serve_forever(listener):
    pywsgi.WSGIServer(listener, hello_world).serve_forever()

number_of_processes = 5
print 'Starting %s processes' % number_of_processes
for i in range(number_of_processes):
    Process(target=serve_forever, args=(listener,)).start()



How to get data received in Flask request

from flask import request

For URL Query parameter, use request.args

search = request.args.get("search")
page = request.args.get("page")

For Form input, use request.form

email = request.form.get('email')
password = request.form.get('password')

For data type application/json, use

# data in string format and you have to parse into dictionary
data =
dataDict = json.loads(data)