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How to load files into the JSZip from remote URL?


How to load files into the JSZip from remote URL?

By : Luis Maya
Date : October 16 2020, 03:08 PM
Hope that helps Update (The solution)
The declaration of the scripts must be at the bottom of the form tag.
code :
<form ...>
...
</form>
<script type="text/javascript"
    src="jquery-1.8.3.min.js"></script>
<script type="text/javascript"
    src="jszip-utils.js"></script>
<script type="text/javascript"
    src="jszip-utils.min.js"></script>
<script type="text/javascript"
    src="FileSaver.js"></script>
<script type="text/javascript"
    src="jszip.js"></script>

<script type="text/javascript"
    src="downloader.js"></script>
<script type="text/javascript"
    src="helpers.js"></script>


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xhr Post with JSZip Javascript / JSZip upgrade

xhr Post with JSZip Javascript / JSZip upgrade


By : Rasmus
Date : March 29 2020, 07:55 AM
it helps some times I'm trying to 'post' and xhr request using a zip file but I'm having trouble getting the zip in the right format. I found a post that showed a similar request using this: , why don't you try this way
code :
zip.generateAsync({type:"blob"}).then(function(content) {
  var data = new FormData();
  data.append("files", content, "Test.zip");
});
JSZip load multiple files with Promise.all in IE11

JSZip load multiple files with Promise.all in IE11


By : Swiss
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further You could convert the jszip promises to jQuery promises using something like this (I haven't tested it, but you get the idea):
code :
function promiseToDeferred(p) {
  var dfd = jQuery.Deferred()

  p
    .then(function(x) { dfd.resolve(x) })
    .catch(function(err) { dfd.reject(err) })

  return dfd.promise()
}
var fileList = [file0,file1...fileX]

var promises = fileList
  .map(function(file) { return zip.file(file.name).async('string') })
  .map(promiseToDeferred)

return jQuery.when.apply(null,[promises])
I need JSZip and gzip for my web page, and JSZip has all the ingredients, but hides them in ways I can't crack

I need JSZip and gzip for my web page, and JSZip has all the ingredients, but hides them in ways I can't crack


By : GeRmAn
Date : March 29 2020, 07:55 AM
seems to work fine As Evert was saying, I should have checked first for the build instructions in the documentation https://stuk.github.io/jszip/documentation/contributing.html.
From that it is clear, first one needs git and makes a local clone. Then one needs to set up the grunt command line, which requires, npm, which comes with nodejs. Once grunt runs, there are other dependencies that need to be npm install-ed. It's the usual little things off and not working, but enough Googling and brute force retrying to get it done.
code :
JSZip.external = require("./external");
module.exports = JSZip;
JSZip.flate = require("./flate");
JSZip.DataWorker = require('./stream/DataWorker');
JSZip.DataLengthProbe = require('./stream/DataLengthProbe');
JSZip.Crc32Probe = require('./stream/Crc32Probe');
JSZip.StreamHelper = require('./stream/StreamHelper');
JSZip.pako = require("pako");
(new JSZip.StreamHelper(
   (new JSZip.DataWorker(Promise.resolve("Hello World! Hello World! Hello World! Hello World! Hello World! Hello World!")))
      .pipe(new JSZip.DataLengthProbe("uncompressedSize"))
      .pipe(new JSZip.Crc32Probe())
      .pipe(JSZip.flate.compressWorker({}))
      .pipe(new JSZip.DataLengthProbe("compressedSize"))
      .on("end", function(event) { console.log("onEnd: ", this.streamInfo) }), 
   "uint8array", "")
).accumulate(function(data) { console.log("acc: ", data); })
 .then(function(data) { console.log("then: ", data); })
'use strict';

var external = require('../external');
var utils = require('../utils');
var flate = require('../flate');
var GenericWorker = require('../stream/GenericWorker');
var DataWorker = require('../stream/DataWorker');
var StreamHelper = require('../stream/StreamHelper');
var DataLengthProbe = require('../stream/DataLengthProbe');
var Crc32Probe = require('../stream/Crc32Probe');

function GZipFileWorker() {
    GenericWorker.call(this, "GZipFileWorker");
    this.virgin = true;
}
utils.inherits(GZipFileWorker, GenericWorker);

GZipFileWorker.prototype.processChunk = function(chunk) {
    if(this.virgin) {
        this.virgin = false;
        var headerBuffer = new ArrayBuffer(10);
        var headerView = new DataView(headerBuffer);
        headerView.setUint16(0, 0x8b1f, true); // GZip magic
        headerView.setUint8(2, 0x08); // compression algorithm DEFLATE
        headerView.setUint8(3, 0x00); // flags
        // bit 0   FTEXT
        // bit 1   FHCRC
        // bit 2   FEXTRA
        // bit 3   FNAME
        // bit 4   FCOMMENT
        headerView.setUint32(4, (new Date()).getTime()/1000>>>0, true);
        headerView.setUint8(8, 0x00); // no extension headers
        headerView.setUint8(9, 0x03); // OS type UNIX
        this.push({data: new Uint8Array(headerBuffer)});
    }
    this.push(chunk);
};

GZipFileWorker.prototype.flush = function() {
    var trailerBuffer = new ArrayBuffer(8);
    var trailerView = new DataView(trailerBuffer);
    trailerView.setUint32(0, this.streamInfo["crc32"]>>>0, true);
    trailerView.setUint32(4, this.streamInfo["originalSize"]>>>0 & 0xffffffff, true);
    this.push({data: new Uint8Array(trailerBuffer)});
};

exports.gzip = function(data, inputFormat, outputFormat, compressionOptions, onUpdate) {
    var mimeType = data.contentType || data.mimeType || "";
    if(! (data instanceof GenericWorker)) {
        inputFormat = (inputFormat || "").toLowerCase();
        data = new DataWorker(
            utils.prepareContent(data.name || "gzip source",
                                 data,
                                 inputFormat !== "string",
                                 inputFormat === "binarystring",
                                 inputFormat === "base64"));
    }
    return new StreamHelper(
        data
            .pipe(new DataLengthProbe("originalSize"))
            .pipe(new Crc32Probe())
            .pipe(flate.compressWorker( compressionOptions || {} ))
            .pipe(new GZipFileWorker()),
        outputFormat.toLowerCase(), mimeType).accumulate(onUpdate);
};
var gzip = require("./generate/GZipFileWorker");
JSZip.gzip = gzip.gzip;
JSZip.gzip("Hello World! Hello World! Hello World! Hello World! Hello World! Hello World!", "string", "base64", {level: 3}).then(function(result) { console.log(result); })
$ echo -n "H4sIAOyR/VsAA/NIzcnJVwjPL8pJUVTwoJADAPCORolNAAAA" |base64 -d |zcat
Hello World! Hello World! Hello World! Hello World! Hello World! Hello World!
JSZip.gzip(file, "", "Blob").then(function(blob) { 
     xhr.setRequestProperty("Content-encoding", "gzip");
     xhr.send(blob); 
  })
Module not found: Error: Can't resolve 'stream' in 'C:\dev\jszip-test\node_modules\jszip\lib'

Module not found: Error: Can't resolve 'stream' in 'C:\dev\jszip-test\node_modules\jszip\lib'


By : Ramesh Shilvant
Date : March 29 2020, 07:55 AM
This might help you After reading this post I found out that the stream package was missing from my project.
You can install it by running the following command:
code :
npm i stream
How to include jszip with requirejs : jszip is not defined

How to include jszip with requirejs : jszip is not defined


By : Pilar Rey del Castil
Date : March 29 2020, 07:55 AM
I think the issue was by ths following , JSZip (and ODS to support ods extension) must be loaded and attached to the window before XLSX is loaded. I'm getting it working using shim with a custom "xlsx-loader":
main.js
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