The zlib.deflateRaw() method is an inbuilt application programming interface of the Zlib module which is used to compress a chunk of data.
Syntax:
zlib.deflateRaw( buffer, options, callback )
Parameters: This method accepts three parameters as mentioned above and described below:
- buffer: It can be of type Buffer, TypedArray, DataView, ArrayBuffer, and string.
- options: It is an optional parameter that holds the zlib options.
- callback: It holds the callback function.
Return Value: It returns the chunk of data after compression.
Below examples illustrate the use of zlib.deflateRaw() method in Node.js:
Example 1:
// Node.js program to demonstrate the // deflateRaw() method // Including zlib module const zlib = require( "zlib" );
// Declaring input and assigning // it a value string var input = "Nidhi Singh" ;
// Calling deflateRaw method zlib.deflateRaw(input, (err, buffer) => { console.log(buffer.toString( 'hex' ));
}); |
Output:
f3cb4cc9c85408cecc4bcf0000
Example 2:
// Node.js program to demonstrate the // deflateRaw() method // Including zlib module const zlib = require( "zlib" );
// Declaring input and assigning // it a value string var input = "GeeksforGeeks" ;
// Calling deflateRaw method zlib.deflateRaw(input, (err, buffer) => { if (!err) {
console.log(buffer.toString( 'hex' ));
}
else {
console.log(err);
}
}); |
Output:
734f4dcd2e4ecb2f7207d100
Reference: https://nodejs.org/api/zlib.html#zlib_zlib_deflateraw_buffer_options_callback