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chat Application with Golang


Description

This repo contains and is about a microservice base chat application with golang.

This chat application is a Room base chat app, users can create rooms and join the rooms, for now the chat is a message base means users by sending messages in the room and all the users in room will receive the message. chat app is implemented with websocket to be real-time.

Beside the chat app there is another service called notification service that will connect to user with websocket.

Used mongoDB for database, Redis for cache, RabbitMQ for message broker.


Diagram

chat_diagram.svg

How to start the app

  1. First clone the repo
    git clone https://github.com/arminshfatemi/chat_application.git
  1. Change directory to the project directory
    cd chat_application
  1. Start the docker compose
    sudo docker compose up

Now all the services are up and running


How the application works

Chat Service:

Chat service is responsible for login, signup of users and creating, joining and sending messages to the users in real time to users.

This service use REST APIs to create rooms, login and signup of user.

And it use websocket for realtime messages sending of messages

Notification Service

Notification Service is responsible for sending notifications to users in real time with websocket

This Service have a consumer that use RabbitMQ Queues to get notifications from Chat service

Scheduler Service

Scheduler Service will do two main task, with the given config it will do it every given time, Ep: every minute or every hour

first task is get the old messages and log them second task is get the old messages and put them in the archive collection

RabbitMQ

RabbitMQ as a message broker is going to be the way that chat service sends events to notification service

MongoDB

Our database to save messages, notifications, clients and rooms

Redis

Cache database for caching the recent messages of the rooms to increase the response time and load


Main urls

1. Signup

URL: http://127.0.0.1:8000/api/user/signup/

method: POST

Example Json:

{
"username": "username",
"email": "[email protected]",
"password": "password"
}

2. login

URL: http://127.0.0.1:8000/api/user/login/

method: POST

Example Json:

{
"username": "username",
"password": "password"
}

3. Room Creation

URL: http://127.0.0.1:8000/api/room/create/

Auth: for being able to use this endpoint you need to put your login JWT in the header example of the token :

Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjE3MTg5MjU2MjMsImlkIjoiNjY3MWE1MmJjY2EyMGUzMThlNjE3ZGQ0IiwidXNlcm5hbWUiOiJ2YXJnaGEifQ.BeRG8eer-fchKmjCcbHqi0edZ7IexIyoJ7XGTaMCuJ8

method: POST

Example Json:

{
"name": "room_name",
}

Description: this url is for creating new room

4. Joining a Room

URL: ws://127.0.0.1:8000/ws/join/?name=

Auth: for being able to use this endpoint you need to put your login JWT in the header example of the token :

Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjE3MTg5MjU2MjMsImlkIjoiNjY3MWE1MmJjY2EyMGUzMThlNjE3ZGQ0IiwidXNlcm5hbWUiOiJ2YXJnaGEifQ.BeRG8eer-fchKmjCcbHqi0edZ7IexIyoJ7XGTaMCuJ8

Example Json:

{
    "type": "message",
    "content": "hello"
}

Description: this url is for joining th room with websocket.

given Json example is for sending a new message in the room you can send message when you are connected.

you need to specify the name of the room you want to join in url example: 127.0.0.1:8000/ws/join/?name=test_room

5. Notification websocket

URL: ws://127.0.0.1:8080/ws/join-notification/

Auth: for being able to use this endpoint you need to put your login JWT in the header example of the token :

Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJleHAiOjE3MTg5MjU2MjMsImlkIjoiNjY3MWE1MmJjY2EyMGUzMThlNjE3ZGQ0IiwidXNlcm5hbWUiOiJ2YXJnaGEifQ.BeRG8eer-fchKmjCcbHqi0edZ7IexIyoJ7XGTaMCuJ8

Description: this endpoint is a websocket, after joining, if the room you are joined get a message it will send a notification in the channel to notify the user

NOTE: the notification of the room will just work if you are the room that is notification for