body-parser VS validation-with-celebrate

Using body-parser you can set the limit on the size of the payload

body-parser is a middleware that parses the body of incoming requests, and exposes the resulting object on req.body

Now that our app can send us messages, can we send messages back to it? Let's implement the slash command, which will allow us to ask our app for some of its important stats and info. This time, Slack will send an HTTP POST to our app. If we take a look at the Slack docs again, we notice that Slack will send the slash command instruction to the URL we specified in the command set up earlier. We can also see that the POST payload is in the format application/x-www-form-urlencoded. We can set up a body-parser to interpret this data.

Our server application is a very simple one. We just render a simple HTML page with a form and input field to search for the user name. And we are using pug as our template engine for the express app and the body-parser library which is Node.js body parsing middleware to parse incoming request bodies in a middleware before your handlers, available under the req.body property.

Body-parser

If you want to see the complete project developed throughout this article, take a look at the GitHub project. Feel free to clone it, fork it, or submit an issue.