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[GH-ISSUE #57] Uncaught (in promise) TypeError: Failed to execute 'update' on 'MediaKeySession': Rejected with system code (22) #44

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opened 2026-02-28 14:27:28 +03:00 by kerem · 0 comments
kerem commented 2026-02-28 14:27:28 +03:00
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Originally created by @h0arder27 on GitHub (Feb 8, 2026).
Original GitHub issue: https://github.com/DevLARLEY/WidevineProxy2/issues/57

I'm getting two errors persistently,

1.'background.scripts' requires manifest version of 2 or lower.
2.Uncaught (in promise) TypeError: Failed to execute 'update' on 'MediaKeySession': Rejected with system code (22)

Context
https://www.zee5.com/tv-shows/details/bhabi-ji-ghar-par-hai/0-6-199/prem-spoils-anitas-plans/0-1-6z5147844

Stack Trace

content_script.js:100 (anonymous function)

(async () => {
    const proxy = (object, method, handler) => {
        const original = object[method];
        if (typeof original !== "function")
            return;


       Object.defineProperty(object, method, {
            value: new Proxy(original, { apply: handler }),
            configurable: true,
            writable: true
        });
    };

    const b64 = {
        decode: s => Uint8Array.from(atob(s), c => c.charCodeAt(0)),
        encode: b => btoa(String.fromCharCode(...new Uint8Array(b)))
    };

    const getManifestType = (text) => {
        const lower = text.toLowerCase();
        if (lower.includes('<mpd') && lower.includes('</mpd>')) {
            return "DASH";
        } else if (lower.includes('#extm3u')) {
            if (lower.includes('#ext-x-stream-inf')) {
                return "HLS_MASTER";
            } else {
                return "HLS_PLAYLIST";
            }
        } else if (lower.includes('<smoothstreamingmedia') && lower.includes('</smoothstreamingmedia>')) {
            return "MSS";
        }
    }

    function emitAndWaitForResponse(type, data) {
        return new Promise((resolve) => {
            const requestId = Math.random().toString(16).substring(2, 9);
            const responseHandler = (event) => {
                const { detail } = event;
                if (detail.substring(0, 7) === requestId) {
                    document.removeEventListener('responseReceived', responseHandler);
                    resolve(detail.substring(7));
                }
            };
            document.addEventListener('responseReceived', responseHandler);
            const requestEvent = new CustomEvent('response', {
                detail: {
                    type: type,
                    body: data,
                    requestId: requestId,
                }
            });
            document.dispatchEvent(requestEvent);
        });
    }

    if (typeof EventTarget !== 'undefined') {
        proxy(EventTarget.prototype, 'addEventListener', (target, thisArg, args) => {
            const [type, listener] = args;

            if (thisArg == null || !(thisArg instanceof MediaKeySession) || typeof MediaKeyMessageEvent === 'undefined' || type !== "message" || !listener) {
                return target.apply(thisArg, args);
            }

            args[1] = async function(event) {
                if (event instanceof MediaKeyMessageEvent && event.isTrusted && event.message.byteLength > 2) {
                    const oldChallenge = b64.encode(event.message);
                    const newChallenge = await emitAndWaitForResponse("REQUEST", oldChallenge);

                    const clonedEvent = new MediaKeyMessageEvent("message", {
                        messageType: event.messageType,
                        message: b64.decode(newChallenge).buffer
                    });

                    event.stopImmediatePropagation();
                    event.preventDefault();

                    thisArg.dispatchEvent(clonedEvent);
                    return;
                }

                if (listener.handleEvent) {
                    listener.handleEvent.call(listener, event);
                } else {
                    listener.call(this, event);
                }
            };

            return target.apply(thisArg, args);
        });
    }

    if (typeof MediaKeySession !== 'undefined') {
        proxy(MediaKeySession.prototype, 'update', async (target, thisArg, args) => {
            if (thisArg == null || !(thisArg instanceof MediaKeySession)) {
                return target.apply(thisArg, args);
            }

            await emitAndWaitForResponse("RESPONSE", b64.encode(args[0]))

            return await target.apply(thisArg, args);
        });
    }

    proxy(XMLHttpRequest.prototype,  "open", (target, thisArg, args) => {
        const [method, url] = args;

        thisArg.requestMethod = method.toUpperCase();
        thisArg.requestURL = url;

        return target.apply(thisArg, args);
    });

    proxy(XMLHttpRequest.prototype, "send", (target, thisArg, args) => {
        thisArg.addEventListener("readystatechange", async () => {
            if (thisArg.requestMethod !== "GET" || thisArg.readyState !== 4) {
                return;
            }

            let body = null;
            switch (thisArg.responseType) {
                case "":
                case "text":
                    body = thisArg.responseText ?? thisArg.response;
                    break;

                case "json":
                    body = typeof thisArg.response === 'string' ? thisArg.response : JSON.stringify(thisArg.response);
                    break;

                case "arraybuffer":
                    if (thisArg.response && thisArg.response.byteLength > 0 && thisArg.response.byteLength < 1_000_000) {
                        const arr = new Uint8Array(thisArg.response);
                        const decoder = new TextDecoder('utf-8', { fatal: false });
                        body = arr.length <= 2000
                            ? decoder.decode(arr)
                            : decoder.decode(arr.slice(0, 1000)) + decoder.decode(arr.slice(-1000));
                    }
                    break;

                case "blob":
                    if (thisArg.response.type.startsWith('text/') || thisArg.response.type.includes('xml') || thisArg.response.type.includes('json') || thisArg.response.size < 100_000) {
                        body = await thisArg.response.text();
                    }
                    break;

                case "document":
                    if (thisArg.response?.documentElement) {
                        body = new XMLSerializer().serializeToString(thisArg.response);
                    }
                    break;
            }

            if (body) {
                const manifest_type = getManifestType(body);
                if (manifest_type) {
                    console.log("WVP2 FOUND MANIFEST", manifest_type, thisArg.responseURL);
                    await emitAndWaitForResponse("MANIFEST", JSON.stringify({
                        url: thisArg.responseURL,
                        type: manifest_type,
                    }));
                }
            }
        });

        return target.apply(thisArg, args);
    });

    proxy(window, "fetch", async (target, thisArg, args) => {
        const response = await target.apply(thisArg, args);

        try {
            if (response) {
                const text = await response.clone().text();
                const manifest_type = getManifestType(text);

                if (manifest_type) {
                    const url = typeof args[0] === "string" ? args[0] : args[0]?.url;

                    if (url) {
                        await emitAndWaitForResponse("MANIFEST", JSON.stringify({
                            url,
                            type: manifest_type
                        }));
                    }
                }
            }
        } catch (err) {
            console.debug("Manifest intercept failed:", err);
        }

        return response;
    });
})();`

The specific line highlighted is,

return await target.apply(thisArg, args);

I should add that the site is probably geo-blocked and a VPN might not work (as per the site FAQ) but the content is accessible to all.

Originally created by @h0arder27 on GitHub (Feb 8, 2026). Original GitHub issue: https://github.com/DevLARLEY/WidevineProxy2/issues/57 I'm getting two errors persistently, 1.'background.scripts' requires manifest version of 2 or lower. 2.Uncaught (in promise) TypeError: Failed to execute 'update' on 'MediaKeySession': Rejected with system code (22) Context https://www.zee5.com/tv-shows/details/bhabi-ji-ghar-par-hai/0-6-199/prem-spoils-anitas-plans/0-1-6z5147844 Stack Trace content_script.js:100 (anonymous function) ``` (async () => { const proxy = (object, method, handler) => { const original = object[method]; if (typeof original !== "function") return; Object.defineProperty(object, method, { value: new Proxy(original, { apply: handler }), configurable: true, writable: true }); }; const b64 = { decode: s => Uint8Array.from(atob(s), c => c.charCodeAt(0)), encode: b => btoa(String.fromCharCode(...new Uint8Array(b))) }; const getManifestType = (text) => { const lower = text.toLowerCase(); if (lower.includes('<mpd') && lower.includes('</mpd>')) { return "DASH"; } else if (lower.includes('#extm3u')) { if (lower.includes('#ext-x-stream-inf')) { return "HLS_MASTER"; } else { return "HLS_PLAYLIST"; } } else if (lower.includes('<smoothstreamingmedia') && lower.includes('</smoothstreamingmedia>')) { return "MSS"; } } function emitAndWaitForResponse(type, data) { return new Promise((resolve) => { const requestId = Math.random().toString(16).substring(2, 9); const responseHandler = (event) => { const { detail } = event; if (detail.substring(0, 7) === requestId) { document.removeEventListener('responseReceived', responseHandler); resolve(detail.substring(7)); } }; document.addEventListener('responseReceived', responseHandler); const requestEvent = new CustomEvent('response', { detail: { type: type, body: data, requestId: requestId, } }); document.dispatchEvent(requestEvent); }); } if (typeof EventTarget !== 'undefined') { proxy(EventTarget.prototype, 'addEventListener', (target, thisArg, args) => { const [type, listener] = args; if (thisArg == null || !(thisArg instanceof MediaKeySession) || typeof MediaKeyMessageEvent === 'undefined' || type !== "message" || !listener) { return target.apply(thisArg, args); } args[1] = async function(event) { if (event instanceof MediaKeyMessageEvent && event.isTrusted && event.message.byteLength > 2) { const oldChallenge = b64.encode(event.message); const newChallenge = await emitAndWaitForResponse("REQUEST", oldChallenge); const clonedEvent = new MediaKeyMessageEvent("message", { messageType: event.messageType, message: b64.decode(newChallenge).buffer }); event.stopImmediatePropagation(); event.preventDefault(); thisArg.dispatchEvent(clonedEvent); return; } if (listener.handleEvent) { listener.handleEvent.call(listener, event); } else { listener.call(this, event); } }; return target.apply(thisArg, args); }); } if (typeof MediaKeySession !== 'undefined') { proxy(MediaKeySession.prototype, 'update', async (target, thisArg, args) => { if (thisArg == null || !(thisArg instanceof MediaKeySession)) { return target.apply(thisArg, args); } await emitAndWaitForResponse("RESPONSE", b64.encode(args[0])) return await target.apply(thisArg, args); }); } proxy(XMLHttpRequest.prototype, "open", (target, thisArg, args) => { const [method, url] = args; thisArg.requestMethod = method.toUpperCase(); thisArg.requestURL = url; return target.apply(thisArg, args); }); proxy(XMLHttpRequest.prototype, "send", (target, thisArg, args) => { thisArg.addEventListener("readystatechange", async () => { if (thisArg.requestMethod !== "GET" || thisArg.readyState !== 4) { return; } let body = null; switch (thisArg.responseType) { case "": case "text": body = thisArg.responseText ?? thisArg.response; break; case "json": body = typeof thisArg.response === 'string' ? thisArg.response : JSON.stringify(thisArg.response); break; case "arraybuffer": if (thisArg.response && thisArg.response.byteLength > 0 && thisArg.response.byteLength < 1_000_000) { const arr = new Uint8Array(thisArg.response); const decoder = new TextDecoder('utf-8', { fatal: false }); body = arr.length <= 2000 ? decoder.decode(arr) : decoder.decode(arr.slice(0, 1000)) + decoder.decode(arr.slice(-1000)); } break; case "blob": if (thisArg.response.type.startsWith('text/') || thisArg.response.type.includes('xml') || thisArg.response.type.includes('json') || thisArg.response.size < 100_000) { body = await thisArg.response.text(); } break; case "document": if (thisArg.response?.documentElement) { body = new XMLSerializer().serializeToString(thisArg.response); } break; } if (body) { const manifest_type = getManifestType(body); if (manifest_type) { console.log("WVP2 FOUND MANIFEST", manifest_type, thisArg.responseURL); await emitAndWaitForResponse("MANIFEST", JSON.stringify({ url: thisArg.responseURL, type: manifest_type, })); } } }); return target.apply(thisArg, args); }); proxy(window, "fetch", async (target, thisArg, args) => { const response = await target.apply(thisArg, args); try { if (response) { const text = await response.clone().text(); const manifest_type = getManifestType(text); if (manifest_type) { const url = typeof args[0] === "string" ? args[0] : args[0]?.url; if (url) { await emitAndWaitForResponse("MANIFEST", JSON.stringify({ url, type: manifest_type })); } } } } catch (err) { console.debug("Manifest intercept failed:", err); } return response; }); })();` ``` The specific line highlighted is, `return await target.apply(thisArg, args);` I should add that the site is probably geo-blocked and a VPN might not work (as per the site FAQ) but the content is accessible to all.
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