Js and copy the code below: In the code snippet above, we did the following: Imported the Redis, Bluebird and node-env-file modules.
Js and add the code below into it In the code snippet above, we did the following Imported Express, the Redis client and our helper functions Created an instance of mobile friendly chat-räume Express Router Created two functions that return messages and active users stored on Redis, using.
The post /user endpoint handles adding users to active users.Pros of using Redis PubSub.Create a stylesheet s in public/assets/css, so that the path is public/assets/css/s and paste below into it: Finally, we need make our username registration form and chat room work.Our helper functions are going to help communicate with Redis to perform various actions which include.Iain Mattaj, currently embl director, believes Human Technopole is a great opportunity for developing science in Italy and Europe.Js Set the environment file Created the instance of Express Set Pug as our view template engine and configured the path to our templates Configured the path of our static files (stylesheets, scripts, etc) Configured a middleware to use body-parser to parse the request body.
The Frontend Remember we said something about Pug (formerly known as Jade) earlier on?
Create a file chat.
Whenever a message is published, an event message is triggered.Pug, the template file we called in our GET / endpoint.Js and copy the code snippet below into it: In the code snippet above, we did the following Imported Express, bodyParser, path, node-env-file modules Imported the Redis client we created in lib/redis.Remove a user from the active user list on the server, just before the browser tab or window is closed listen for messages emitted by the server and add them to the message wall using Listen for updated active users list and display them using.Cons of using Redis PubSub, it is not capable of persistence, which means messages are not saved or cached.
The delete /user endpoint removes users from active users.
Pug and overriding the block content to hold the structure we want.