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Node.js | zlib.unzipSync() Method

  • Last Updated : 23 Mar, 2020

The zlib.unzipSync() method is an inbuilt application programming interface of the Zlib module which is used to decompress a chunk of data with Unzip.

Syntax:

zlib.unzipSync( buffer, options )

Parameters: This method accepts two 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.

Return Value: It returns the chunk of data with Unzip.

Below examples illustrate the use of zlib.unzipSync() method in Node.js:



Example 1:




// Node.js program to demonstrate the     
// zlib.unzipSync() method  
  
// Including zlib module
var zlib = require('zlib');
  
// Declaring input and assigning
// it a value string
var input = "NidhiSingh";
  
// Calling gzipSync method
var gzi = zlib.gzipSync(input);
  
// Calling unzipSync method
var decom = zlib.unzipSync(
    new Buffer.from(gzi)).toString('base64');
  
console.log(decom);

Output:

TmlkaGlTaW5naA==

Example 2:




// Node.js program to demonstrate the     
// zlib.unzipSync() method  
  
// Including zlib module
var zlib = require('zlib');
  
// Declaring input and assigning
// it a value string
var input = "NidhiSingh";
  
// Calling gzipSync method
var gzi = zlib.gzipSync(input).toString('hex');
  
// Calling unzipSync method
var decom = zlib.unzipSync(
    new Buffer.from(gzi, 'hex')).toString('hex');
  
console.log(decom);

Output:

4e6964686953696e6768

Reference: https://nodejs.org/api/zlib.html#zlib_zlib_unzipsync_buffer_options




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