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Instagram Anonymous Story Viewer

Blocks specific requests to maintain anonymity while viewing Instagram stories, supporting XMLHttpRequest, Fetch API, and GraphQL.

// ==UserScript==
// @name         Instagram Anonymous Story Viewer
// @version      1.0
// @description  Blocks specific requests to maintain anonymity while viewing Instagram stories, supporting XMLHttpRequest, Fetch API, and GraphQL.
// @license      MIT
// @author       Mobile46
// @match        *://*.instagram.com/*
// @include      *://*.instagram.com/*
// @run-at       document-start
// @icon         https://www.google.com/s2/favicons?domain=instagram.com&sz=32
// @namespace    https://greasyfork.org/users/1466082
// ==/UserScript==

(function() {
    'use strict';

    const config = {
        debug: false,
        blockedPatterns: [
            /viewSeenAt/i,
            /story_view/i,
            /seen_timestamp/i
        ]
    };

    const log = (...args) => {
        if (config.debug) {
            console.log('[Instagram Anonymous Story Viewer]', ...args);
        }
    };

    const shouldBlockRequest = (data) => {
        if (!data) return false;
        try {
            const strData = typeof data === 'string' ? data : JSON.stringify(data);
            return config.blockedPatterns.some(pattern => pattern.test(strData));
        } catch (e) {
            log('Error checking request data:', e);
            return false;
        }
    };

    const originalXMLSend = XMLHttpRequest.prototype.send;
    XMLHttpRequest.prototype.send = function(...args) {
        try {
            if (shouldBlockRequest(args[0])) {
                log('Blocked XMLHttpRequest with viewSeenAt data');
                return;
            }
            return originalXMLSend.apply(this, args);
        } catch (e) {
            log('Error in XMLHttpRequest override:', e);
            return originalXMLSend.apply(this, args);
        }
    };

    const originalFetch = window.fetch;
    window.fetch = async function(...args) {
        try {
            const [resource, options = {}] = args;
            const body = options.body || null;

            if (shouldBlockRequest(body) ||
                (typeof resource === 'string' && shouldBlockRequest(resource))) {
                log('Blocked Fetch request with viewSeenAt data');
                return new Promise(() => {});
            }

            return await originalFetch.apply(this, args);
        } catch (e) {
            log('Error in Fetch override:', e);
            return originalFetch.apply(this, args);
        }
    };

    const protectOverrides = () => {
        try {
            Object.defineProperty(window, 'fetch', {
                value: window.fetch,
                writable: false,
                configurable: false
            });

            Object.defineProperty(XMLHttpRequest.prototype, 'send', {
                value: XMLHttpRequest.prototype.send,
                writable: false,
                configurable: false
            });
        } catch (e) {
            log('Error protecting overrides:', e);
        }
    };

    try {
        protectOverrides();
        log('Script initialized successfully');
    } catch (e) {
        console.error('[Instagram Anonymous Story Viewer] Initialization error:', e);
    }
})();