GM_xmlhttpRequest NetworkError

[ArtiiP]

my userscript stopped downloading img (and pack to zip) in latest TM version (6130)
it only displays a weird error on console and doesn't even "fire" onerror function

Expected Behavior

let it works as previous version i.e. TM 4.11.6120

Actual Behavior

console error

content.js:102:421 via beautifier in ff-dev:

i tried to download files from my "server" and i am getting normal requests in logs

(very painfull) downgrade to 6120 fix this situation

Specifications

• Firefox 87.0b6 (64 bit) dev
• TM: 4.12.6130
• OS: Win7

Script

only small snippets function
zip: is JSZip blob open for writing

function urlToBlob(url, fname, zip, tablic){
        GM_xmlhttpRequest({
            method: "GET",
            url: url,
            responseType: 'arraybuffer',
            onload: function(event) {
                console.log(event);
                var byteArray = new Uint8Array(event.response);
                console.log(zip.file(fname, byteArray, {binary:true, compression: "STORE"}));
                tablic[url] = fname;
            },
            onerror: function(res) {
                  var msg = "An error occurred."
                  + "\nresponseText: " + res.responseText
                  + "\nreadyState: " + res.readyState
                  + "\nresponseHeaders: " + res.responseHeaders
                  + "\nstatus: " + res.status
                  + "\nstatusText: " + res.statusText
                  + "\nfinalUrl: " + res.finalUrl;
                  console.log(msg);
              }
        });
}

I added onerror later (to debug this problem) but it's never fired

[derjanb]

This seems to work here pretty good using the script below. Can you please test with a new temporary profile?

Tested at

• Ubuntu 20.04 87.0b7 (64-bit)
• W10 85.0.2 (64-Bit)
• W10 86.0 (64-Bit)

// ==UserScript==
// @name         New Userscript
// @namespace    http://tampermonkey.net/
// @version      0.1
// @description  try to take over the world!
// @author       You
// @match        http://*/*
// @icon         data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==
// @require      https://cdnjs.cloudflare.com/ajax/libs/jszip/2.6.0/jszip.min.js
// @require      https://cdnjs.cloudflare.com/ajax/libs/FileSaver.js/2.0.0/FileSaver.min.js
// @grant        GM_xmlhttpRequest
// @connect      *
// ==/UserScript==

function urlToBlob(url, fname, zip, tablic){
    return new Promise(resolve => {
        GM_xmlhttpRequest({
            method: "GET",
            url: url,
            responseType: 'arraybuffer',
            onload: function(event) {
                console.log(event);
                var byteArray = new Uint8Array(event.response);
                console.log(zip.file(fname, byteArray, {binary:true, compression: "STORE"}));
                tablic[url] = fname;
                resolve();
            },
            onerror: function(res) {
                var msg = `An error occurred.
                    responseText: ${res.responseText}
                    readyState: ${res.readyState}
                    responseHeaders: ${res.responseHeaders}
                    status: ${res.status}
                    statusText: ${res.statusText}
                    finalUrl: ${res.finalUrl}
                `;
                console.log(msg);
                resolve();
            }
        });
    });
}

(async () => {
    const zip = JSZip();
    const tablic = {};

    for (let e of [
        [ 'data:image/gif;base64,R0lGODlhAQABAAAAACH5BAEKAAEALAAAAAABAAEAAAICTAEAOw==', 'empty.gif' ],
        [ 'https://developer.mozilla.org/favicon144.png', 'mozilla.png' ],
        [ 'https://www.tampermonkey.net/favicon.ico', 'tampermonkey.ico' ],
        [ 'https://user-images.githubusercontent.com/8899307/110259506-e6953d80-7f9f-11eb-8257-2e60a04457e8.png', 'githubusercontent.png' ],
        [ 'https://tampermonkey.freetls.fastly.net/images/security.png', 'security.png' ]
    ]) {
        const [ url, name ] = e;
        await urlToBlob(url, name, zip, tablic);
    }

    saveAs(zip.generate({ type: 'blob' }), 'out.zip');
})();

[ArtiiP]

firefox containers is the problem here ;/
normaly i use
https://addons.mozilla.org/pl/firefox/addon/multi-account-containers/
and
https://addons.mozilla.org/pl/firefox/addon/temporary-containers/
this last addon in auto mode (that means all tab have new temporary cointarner)

if i force noncontainer mode tab and run my or your script - it's works as expected, but changing tab to new or old container make this error

/then why older TM works but new one no/

[derjanb]

Tampermonkey now uses another way to forward the XHR's data to the tab. Unfortunately this way seems to be incompatible with containers.

Will be fixed soon...