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Shubham Ankit

Shubham Ankit

5 years ago

How to Sending form data to a template on flask

I’m trying to create a login page and have managed to get each separate page working but when you click “Login” it should take you to a profile page and when you click “Register” it should take you back to login. This does not happen and instead comes up with the ‘can’t reach this page’. How can I use flask to send the data from the template and render a new page?

Python:

from flask import Flask, request, render_template
import sqlite3
from flask import g

app = Flask(__name__)

DATABASE = './users.db'


def get_db():
    db = getattr(g, '_database', None)
    if db is None:
        db = g._database = sqlite3.connect(DATABASE)
    return db


@app.teardown_appcontext
def close_connection(exception):
    db = getattr(g, '_database', None)
    if db is not None:
        db.close()


def query_db(query, args=(), one=False): #connects html with
    cur = get_db().execute(query, args)
    rv = cur.fetchall()
    cur.close()
    return (rv[0] if rv else None) if one else rv


def valid_login(username, password):
    user = query_db('select * from User where username = ? and password = ?', [username, password], one=True)
    if user is None:
        return False
    else:
        return True


def log_the_user_in(username):
    return render_template('profile.html', username=username)


def register_user(name, email, username, password):
    query_db('INSERT INTO users (username, password, email, name) VALUES' '(%s, %s, %s, %s)',
             (username, password, email, name))


@app.route("/")
@app.route('/login', methods=['POST', 'GET'])
def login():
    error = None
    if request.method == 'POST':
        if valid_login(request.form['username'], request.form['password']):
            return log_the_user_in(request.form['username'])
        else:
            error = 'Invalid username/password'

    return render_template('login.html', error=error)


@app.route('/register', methods=['POST', 'GET'])
def register():
    if request.method == 'POST':
        register_user(request.form['name'], request.form['email'], request.form['username'], request.forn['password'])
        return render_template('login.html', error=None)

    return render_template('Register.html', error=None)


if __name__ == "__main__":
    app.run()

Html:

<html>

    <head>

        <link rel="stylesheet" href="../static/form-style.css">



        <script>

        function validateForm() {

        var x = document.forms["login-form"]["username"].value;

        if (x==null || x=="") {

            alert("Name must be filled out");

            return false;

        }

        var y = document.forms["login-form"]["password"].value;

        if (y==null || y=="") {

            alert("Password name must be filled out");

            return false;

        }

        }



        </script>



    </head>

    <body>

        <div>

                <form name="login-form"  action="/login" onsubmit="return validateForm()" target="_self" method="POST"  >

                    <h2>Login:</h2>


                    <input type ="text" name ="username" placeholder="Username"><br>

                    <input type="password" name="password" placeholder="Password"><br>

                    <input type="submit" value="Submit"><br>

                </form>

        </div>

    </body>

</html>

Does anyone have a clue about how to edit? Thanks in advance.

#python #html #flask

How to Sending form data to a template on flask
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