A simple server - client application connected and communicating through web sockets.
The task consists of setting up a simple flask server and a client application that connects to the server through web sockets. The client can request the following things from the server:
- Current server timestamp.
- Number of clients connected to the server.
- Time since "this" client is connected to the server.
Along with this, the server should send a "Connected" message every 1 min to all the connected clients. Based on this, mutiple socket listeners were created.
The following are the server side listeners and client side emitters:
| # | Socket | Functionality |
|---|---|---|
| 1. | connect | connects the client with the server |
| 2. | join | joins the specific client to the room based on the socket-id |
| 3. | disconnect | disconnects the client from the server |
| 4. | server_time | fetches the server's current timestamp |
| 5. | client_time | fetches the time duration since the specific client was connected |
| 6. | num_clients | fetches the number of clients connected to the server |
| 7. | ping | pings the server in order to check the connection |
From the above list, #4, #5, #6 and #7 are also the server side emitters and client side listeners.
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First step is to install the required dependencies.
pip install -r requirements.txt
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Next, run the server.
python app.py
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You can now open the webpage available at localhost in your browser.
Before running the application, you can create a
.envfile which will contain the following details:
REDIS_HOST=xxxxx # redis host
REDIS_PORT=xxxxx # redis port number
REDIS_PASSWORD=xxxxx # password required to connect
PORT=xxxxx # port number to start the server on
DEBUG=True # debug modeGoogle Drive Link for the video: Demo of communication of a server connected with 5 other clients.