The gzuncompress of php equivalent on javascript

Question

I have a php file that do:

echo(gzcompress("TEST COMPRESS"));

and on javascript i do a request on php and i want a function that do the same of gzuncompress(data) for take the result = "TEST COMPRESS" again on client side.

EDIT: Thank you @aaronk6, zlib worked!

If someone ready this question, the zlib will works if the php is with gzencode(), gzcompress will not work.

Hello, is not for http, is for phonegap, i need a function :D — Matheus Benedet, Feb 27 '15 at 20:46

score 2 · Accepted Answer · answered Feb 27 '15 at 20:59

2

As @SLaks pointed out, this is might be pointless, however here’s an answer to your question.

Browsers do not have a uncompress method that is accessible from JavaScript, so there’s no equivalent. When you want to decompress gzipped data in JavaScript, you will need to use a JavaScript implementation of the gzip algorithm.

There’s zlib.js which seems to be capable of doing this.

answered Feb 27 '15 at 20:59

aaronk6

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Heyyy Thank you! Worked Perfect!! I just had tochange in php the gzcompress() to gzencode() and works the Zlib.Gunzip(data).decompress() – Matheus Benedet Feb 27 '15 at 22:10

score 0 · Answer 2 · answered Dec 12 '20 at 17:24

If you have PHP running on your server, and you want to decompress a zlib-compressed string in Javascript, an alternative to using the zlib.js library would be to use the Fetch API to re-contact the server and then simply gzuncompress() using PHP.

Example:

const decompressString = async (compressedString) => {

  const decompressionScriptFilepath = '/decompress-string.php';
  const compressedStringToSend = { method: 'POST', body: compressedString };
  const response = await fetch(decompressionScriptFilepath, compressedStringToSend);

  return await response.text();
}

PHP Script at /decompress-string.php

<?php

  $Compressed_String = file_get_contents('php://input');
  $decompressedString = gzuncompress($Compressed_String);
  echo $decompressedString;

?>

Then you simply need to invoke the javascript function:

decompressString('eNoLycgsVgCiRIWS1OISPYWQUf4of5Q/yh/lj/JH+aP8wc0HAERY4KM=');

The gzuncompress of php equivalent on javascript

2 Answers2