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Create a Chat Application using Angular, Flask, and Socket.IO

In this project, we’ll build a real-time chat application using Angular, Flask, and Socket.IO that will include a chat history storing feature using SQLite.

Create a Chat Application using Angular, Flask, and Socket.IO

You will learn to:

Use Socket.IO to facilitate real time communication in a web application.

Use SQLite3 to store and retrieve user chats.

Implement user management using Flask and Angular.

Use the library in Angular for the client-side implementation of Socket.IO.


Web Development

Full Stack Development

Web Frameworks


Familiarity with Socket.IO

Good understanding of Angular

Good understanding of Flask and SQLite



SQLite logo




Project Description

The Socket.IO library is a powerful tool that facilitates seamless real-time communication between clients and servers. We'll create an engaging chat application where each user will have their own account after completing the registration process. This personalized account will grant access to the application after logging in. The application will enable the logged-in users to look for other online users and start a chat with anyone they want. Moreover, the users will be able to see the list of users they’ve previously conversed with. They will also have access to the chat history with each user.

In this project, we'll set up the backend using Flask, a famous Python framework for web development. The front-end implementation of Socket.IO and Flask will be done using Angular and Material UI. We will also handle database-related operations using SQLite, a file-based SQL database that can be connected using the sqlite3 Python module.

Here is the complete layout of the application:

1 of 3

Project Tasks


Getting Started

Task 0: Introduction

Task 1: Handle the SQLite Operations

Task 2: Create User and Message Tables


Set Up and Implement User Authentication

Task 3: Create User Management Endpoints

Task 4: Create an Auth Service

Task 5: Develop the Sign-Up Page

Task 6: Develop the Sign-In Page

Task 7: Implement Sign-Out Logic


Set Up and Implement Chat Features along with

Task 8: Create Endpoints to Post and Retrieve Chats

Task 9: Handle the Socket.IO Connection and Real-Time Messages

Task 10: Retrieve and Show Users With Existing Chat History

Task 11: Set Up a Socket in the Client and Receive Messages from the Server

Task 12: Filter and Select Online Users For a Direct Chat

Task 13: Send Messages Using Socket.IO and Store Chat History