Chat App Using Flask-SocketIO & Deployed in Heroku

Introduction

This is a chat application, implemented using Flask-SocketIO with both the database (PostgreSQL) and the app deployed in Heroku. It also has user registration and authentication functionalities.

Demo

Files in the program

• application.py: This is the main app file and contains both the registration/login page logic and the Flask-SocketIO backend for the app.
• models.py: Contains Flask-SQLAlchemy models used for user registration and login in application.py
• wtform_fields.py: Contains the classes for WTForms/Flask-WTF and the custom validators for the fields
• create.py: optional file only required if repo is to be cloned. See 'Usage' section below.
• Procfile: file required for Heroku
• requirements.txt: list of Python packages installed (also required for Heroku)
• templates/: folder with all HTML files
• static/: for with all JS scripts and CSS files

Code along series

Watch the 13-part video series where I build this app from scratch

Usage

Run app

Use the link to the production server directly.

Clone/Modify app

1. Modify application.py to replace the secret key (i.e. os.environ.get('SECRET')) with a secret key of your choice and the database link (i.e. os.environ.get('DATABASE_URL')) with the link to your own database.

   The two lines to be edited in application.py are shown below:

app.secret_key=os.environ.get('SECRET')
app.config['SQLALCHEMY_DATABASE_URI']=os.environ.get('DATABASE_URL')

2. Edit create.py to once again replace os.environ.get('DATABASE_URL') with the link to your database.

3. Run create.py from the terminal to create the table to hold user credentials.

foo@bar:~$ python create.py

Roadmap

Add security features relating to Input Validation, Cross Domain, Secure Transmission and Logging.

See OWASP Cheat Sheet Series.

License

CC-BY