Express.js – express.raw() function

express.raw() is a built-in middleware function in Express. It parses the incoming requests into a buffer and it is based upon the body-parser. This method returns the middleware that parses all JSON bodies as buffer and only looks at the requests where the content-type header matches the type option.

Syntax

express.raw([options])

Parameters

Following are the different options available with this method

• options –

  • inflate – This enables or disables the handling of the deflated or compressed bodies. Default: true

  • limit – Controls the maximum size of the request body.

  • type – Determines the media type for the middleware that will be parsed.

Example 1

Create a file with the name "expressRaw.js" and copy the following code snippet. After creating the file, use the command "node expressRaw.js" to run this code.

// express.raw() Demo Example

// Importing the express module
var express = require('express');

// Initializing the express and port number
var app = express();
var PORT = 3000;

// Using the express.raw middleware
app.use(express.raw());

// Reading content-type
app.post('/', function (req, res) {
   console.log(req.body)
   res.end();
})

// Listening to the port
app.listen(PORT, function(err){
   if (err) console.log(err);
   console.log("Server listening on PORT", PORT);
});

Before hitting the API endpoint, set the following two properties −

• Set the content-type as application/octet-stream in headers.

• Pass the following body in the POST request – {"name": "TutorialsPoint"}

Output

C:\home\node>> node expressRaw.js
Server listening on PORT 3000

Example 2

Let’s take a look at one more example.

// express.raw() Demo Example

// Importing the express module
var express = require('express');

// Initializing the express and port number
var app = express();
var PORT = 3000;

// Commenting the express.raw middleware

// app.use(express.raw());

// Reading content-type
app.post('/', function (req, res) {
   console.log(req.body)
   res.end();
})

// Listening to the port
app.listen(PORT, function(err){
   if (err) console.log(err);
   console.log("Server listening on PORT", PORT);
});

Before hitting the API endpoint, set the following two properties −

• Set the content-type as application/octet-stream in headers.

• Pass the following body in the POST request – {"name": "TutorialsPoint"}

Output

C:\home\node>> node expressRaw.js
Server listening on PORT 3000
undefined