body-parser is a middleware function that parses the incoming request body and makes it available in the request object as request.body https://expressjs.com/en/resources/middleware/body-parser.html.

This module allows an application to parse the incoming request as:

• JSON
• Text
• Raw (buffer original incoming data)
• URL encoded form

The module supports automatic decompression of gzip and deflates encodings when the incoming request is compressed.