README.md

Flask-Login-MySQL

Flask-Login-MySQL with Session

$ pip install bcrypt
$ pip install mysql

Important Libraries are:

from flask import Flask, render_template, request, redirect, url_for, session
from flask_mysqldb import MySQL,MySQLdb
import bcrypt

Initialize Flask

app = Flask(__name__)

MYSQL DB Connection:

app.config['MYSQL_HOST'] = 'localhost'
app.config['MYSQL_USER'] = 'root'
app.config['MYSQL_PASSWORD'] = '' # Password Here
app.config['MYSQL_DB'] = 'flaskdb' # Database Name 
app.config['MYSQL_CURSORCLASS'] = 'DictCursor'
mysql = MySQL(app)

Login Route:

@app.route('/login',methods=["GET","POST"])
def login():
    if request.method == 'POST':
            email = request.form['email']
            password = request.form['password'].encode('utf-8')

            try:
                curl = mysql.connection.cursor(MySQLdb.cursors.DictCursor)
                curl.execute("SELECT * FROM users WHERE email=%s",(email,))
                user = curl.fetchone()
                curl.close()
                print(len(user))
                if len(user) > 0:
                    if bcrypt.hashpw(password, user["password"].encode('utf-8')) == user["password"].encode('utf-8'):
                        session['name'] = user['name']
                        session['email'] = user['email']
                        return render_template("home.html")
                    else:
                        return "Error password and email not match"
            except Exception as e:
                return "Error user not found"
    else:
        return render_template("login.html")

Logout Route:

  @app.route('/logout', methods=["GET", "POST"])
  def logout():
      session.clear()
      return render_template("home.html")