App 7: Your First Website with Flask / Build a guestbook website
Lesson 5 of 10
Forms and POST
A form sends data to the server with a POST request. Read it from request.form, then redirect so refreshing doesn't send it twice.
Key points
- methods=["GET", "POST"]
- request.form["name"]
- Redirect after POST
from flask import request, redirect, url_for
messages = []
@app.route("/", methods=["GET", "POST"])
def home():
if request.method == "POST":
messages.append(request.form["message"])
return redirect(url_for("home"))
return render_template("index.html", messages=messages)Your turn
Add a guestbook form that shows every message on the page.
Quiz · +10 XP
Why redirect after handling a POST?
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