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Netsuite Suitescript Decode Base64

I'm doing Api integration with Suitescript 2.0. A data encoded with base64 is returned from the Api. Here I need to reach the data I want by decoding the base64 and saving the xml data returned as a .zip and unzip it.
The relevant data can be run in Notepad++ with Plugins > MIME Tools > Decode Base64, saved as zip and opened with unzip.
The script I'm working with is a shcedule script.
I tried the two methods mentioned to decode in Suite Answers.
1- From base64 to UTF_8 with N/encode module (Returned result is completely wrong for this problem)
2 - The solution in the link:
https://netsuite.custhelp.com/app/answers/detail/a_id/41271/kw/base64%20decode
(In this solution, when you save the returned data as zip, it gives an "Unexpected end of the archive" error when opening the zip.)
ArrayBuffer() and atob() are not available in Suitescript.

The thing I know will work is to proxy the call through a Lambda on some external system.
However if your data is already in base64 you might try just creating a file cabinet file and give it the base64 encoded value as its content. Netsuite already handles base64 for files so you might be overworking the issue. It doesn't sound like you are actually processing the xml if your end goal is to save it as a zip.
If this doesn't help see my comments regarding some clarifications you could add to your question.

require(["N/encode"], function(encode){
var txt = encode.convert({
string: "your Base64 string",
inputEncoding: encode.Encoding.BASE_64,
outputEncoding: encode.Encoding.UTF_8
});
}
SuiteScript example
All types of encode

nodejs gmail api - attachment download url

so i got the attachment id from the api, and the payload is data in bytes
from https://developers.google.com/gmail/api/v1/reference/users/messages/attachments#resource
The body data of a MIME message part as a base64url encoded string.........
so i tried decoding it with https://github.com/brianloveswords/base64url
and few other base64 plugins - all returing another unreadable string format.
since i wasn't sure if it was an actual file or decoded url i tried exporting contents to a file with known extension without much success, so it should be a download link.
does anyone have any idea how to get a readable format of this string?
payload string sample
1op669AzYx7c9caYxOd0ZWzNE7IqPyUUnmRkib4HPAUbc3FzzEs7xWl6glqXXo2Y_hjSfT9CtS0THzTkf2rZ8UbKU6S
base64 utf8 decoded sample
↑8�k垬☼A��VN��\�>�/i��U�ՁR∟F����A�☺ň<�v¶��C� I-t��]⌂�R☺
string is much muh bigger, testing can be done here for full response https://developers.google.com/gmail/api/v1/reference/users/messages/attachments/get
UPDATE
Solved it
https://stackoverflow.com/a/16350999/7579200

Sounds like you should use the get function.

Converting an s3 bucket policy to base64 from JSON in node.js

I'm trying to encode an Amazon s3 bucket policy in base64 in node.js for the signature (more specifically the StringToSign), but can't seem to get the code right.
I'm using a default policy provided by amazon to test with because they provide the correct base64 encoding. (The example given by amazon)
Their output is eyAiZXhwaXJhdGlvbiI6ICIyMDE1........ (Keeping it short because it's quite long)
I keep getting eyJleHBpcmF0aW9uIjoiMjAxNS0xMi0zMFQx.....
my code to generate this is:
var policyString = JSON.stringify(policy)
var policyBytes = utf8.encode(policyString)
var stringToSign = base64.encode(policyBytes)
where policy is a variable holding the amazon policy in JSON format, and utf8 and base64 are node modules.
This might sound like a novice question but I've been staring at it for awhile now and any hlep would be appreciated!

I decoded the current partial values you have provided
eyAiZXhwaXJhdGlvbiI6ICIyMDE1
eyJleHBpcmF0aW9uIjoiMjAxNS0xMi0zMFQx
Respective outputs were:
{ "expiration": "2015
{"expiration":"2015-12-30T1
As you can see, in your policyString you have removed some spaces. This is the reason for you to get a different output

Node.JS binary data URL Decoding to UTF-8 issue

When i am sending binary data with UTF-8 encoded from PHP client to Node.JS server, Node.JS internally encodes this data to URL Encode(percentage encoding). I guess Node.JS doesn't have support for UTF-8 as i already checked with base64 and it was working fine. I googled a lot and i found that everyone is facing the same issue. I manually checked the string but I get "URIError: URI malformed" error.
I also use the deprecated functions unescape, escape, encodeURI and decodeURI.
Little background of my work:
console.log(decodeURIComponent('%B1');
As you can search from the URLEncoding list that %B1 is for "±" sign. But i am getting the above mentioned error. This function can't decode other many special characters too. I don't know why Node.JS doesn't have support for the standard decoding style like UTF-8.
Please help me guys.

ajax gzip compress a string for postdata

Can't seem to find anything related to gzip compressing a string. Only find broken sites or suggestions for compressions that won't work as gzip. Also lots of talk of server side implementation. However I wish to send the encoded data from the client.
To give clarification all my clients use greasemonkey or scriptish and all my clients are generally on some version of a recent Firefox or one of it's derivatives, so content encoding for everyone is not an issue.
What I do need is a pure javascript or some sort of library loadable by javascript to gzip compress a string.

Just achieved this using https://github.com/dankogai/js-deflate However the postdata for whatever reason will strip the + signs and replace them with spaces.
To send the data via javascript:
params.mapdata= btoa(RawDeflate.deflate(JSON.stringify(mapdata)));
To receive the data via php:
$value = gzinflate(base64_decode(preg_replace('/\s/', '+',$value)));