bchaber/app.py

## app.py
from flask import Flask
from flask import request
from flask import make_response
from json import loads, dumps
import random, string

app = Flask(__name__)

carts = { # server-side application state
  'deadbeef' : {'Marchewka' : 4}
}

@app.route("/add2cart", methods=["POST"])
def add2cart():
  sessionid = ''.join(random.choices(string.ascii_lowercase + string.digits, k=8))
  cookies = request.headers.get("Cookie", "")
  # try to read the session ID from a cookie
  for cookie in cookies.split(";"):
    if cookie.startswith("sessionid="):
      sessionid = cookie[len("sessionid="):]
  # if the user has no cart -- create an empty one
  if sessionid not in carts:
    carts[sessionid] = {}

  product = request.form.get("product", "")
  if product.strip() == "": # strip removes leading and trailing whitespaces
    response = make_response("Pusta nazwa produktu", 400)
    return response # exit early with an error code

  print(f"Dodaje {product} do {carts[sessionid]} ({sessionid})")
  if product in carts[sessionid]:
    carts[sessionid][product] += 1 # increase
  else:
    carts[sessionid][product]  = 1 # initialize

  response = make_response("OK", 200)
  # return a session ID, especially if the request had no session cookie
  response.headers["Set-Cookie"] = "sessionid=" + sessionid + "; HttpOnly"
  return response

@app.route("/")
def index():
  html = """
<!doctype html>
<html>
 <body>
  <form action="/add2cart" method="POST">
   <input type="text" name="product" placeholder="Nazwa produktu" />
   <input type="submit" value="Dodaj jedną sztukę do koszyka" />
  </form>

  <p>W naszym warzywniaku mamy</p>
  <ul>
   <li>Marchewka;</li>
   <li>Rzodkiewka;</li>
   <li>Ogórek;</li>
   <li>Kalarepka.</li>
  </ul>
"""
  response = make_response(html, 200)
  return response

# $ python3 -m pip install gunicorn
# $ gunicorn -w 1 app:app
	from flask import Flask
	from flask import request
	from flask import make_response
	from json import loads, dumps
	import random, string

	app = Flask(__name__)

	carts = { # server-side application state
	'deadbeef' : {'Marchewka' : 4}
	}

	@app.route("/add2cart", methods=["POST"])
	def add2cart():
	sessionid = ''.join(random.choices(string.ascii_lowercase + string.digits, k=8))
	cookies = request.headers.get("Cookie", "")
	# try to read the session ID from a cookie
	for cookie in cookies.split(";"):
	if cookie.startswith("sessionid="):
	sessionid = cookie[len("sessionid="):]
	# if the user has no cart -- create an empty one
	if sessionid not in carts:
	carts[sessionid] = {}

	product = request.form.get("product", "")
	if product.strip() == "": # strip removes leading and trailing whitespaces
	response = make_response("Pusta nazwa produktu", 400)
	return response # exit early with an error code

	print(f"Dodaje {product} do {carts[sessionid]} ({sessionid})")
	if product in carts[sessionid]:
	carts[sessionid][product] += 1 # increase
	else:
	carts[sessionid][product] = 1 # initialize

	response = make_response("OK", 200)
	# return a session ID, especially if the request had no session cookie
	response.headers["Set-Cookie"] = "sessionid=" + sessionid + "; HttpOnly"
	return response

	@app.route("/")
	def index():
	html = """
	<!doctype html>
	<html>
	<body>
	<form action="/add2cart" method="POST">
	<input type="text" name="product" placeholder="Nazwa produktu" />
	<input type="submit" value="Dodaj jedną sztukę do koszyka" />
	</form>

	<p>W naszym warzywniaku mamy</p>
	<ul>
	<li>Marchewka;</li>
	<li>Rzodkiewka;</li>
	<li>Ogórek;</li>
	<li>Kalarepka.</li>
	</ul>
	"""
	response = make_response(html, 200)
	return response

	# $ python3 -m pip install gunicorn
	# $ gunicorn -w 1 app:app