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Node.js | zlib.createUnzip() Method
  • Last Updated : 05 Mar, 2020

The zlib.createUnzip() method is an inbuilt application programming interface of the Zlib module which is used to create a new Unzip object.

Syntax:

zlib.createUnzip( options )

Parameters: This method accepts single parameter options which is an optional parameter that holds the zlib options.

Return Value: It returns a new Unzip object.

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



Example 1:




// Node.js program to demonstrate the     
// createUnzip() method
  
// Including zlib module
var zlib = require('zlib');
  
// Calling gzip function to compress data
zlib.gzip('Nidhi Singh', function(err, data)
 {
  if (err) 
  
    return console.log('err', err);
  }
  
  // Calling createUnzip method
  // to decompress the data again
  var unzip = zlib.createUnzip();
  unzip.write(data);
  unzip.on('data', function (data)
   {
      console.log(data.toString());
  });
});

Output:

Nidhi Singh

Example 2:




// Node.js program to demonstrate the     
// createUnzip() method
  
// Including zlib module
var zlib = require('zlib');
  
// Calling gzip function to compress data
zlib.gzip('Nidhi Singh', function(err, data)
 {
  if (err) 
  
    return console.log('err', err);
  }
  
  // Calling createUnzip method
  // to decompress the data again
  var unzip = zlib.createUnzip();
  unzip.write(data);
  unzip.on('data', function (data)
   {
      console.log(data.toString('hex'));
  });
});

Output:

4e696468692053696e6768

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

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