IG Anon

Intercept XHR and fetch, block requests that contain "viewSeenAt" (in URL or body)
当前为 2025-09-30 提交的版本，查看最新版本。
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// ==UserScript==
// @name         IG Anon
// @version      1.0
// @description  Intercept XHR and fetch, block requests that contain "viewSeenAt" (in URL or body)
// @author       SilentArt
// @match        https://www.instagram.com/*
// @grant        none
// @run-at       document-start
// @namespace https://gf.qytechs.cn/users/1521018
// ==/UserScript==

(function () {
    'use strict';

    const URL_BLOCK_PATTERNS = [
        'viewSeenAt',
        '/reel/seen',
        'story_media_viewer',
        'reel_media_viewer',
        'story_seen',
        'reel_media_seen'
    ];

    function shouldBlockUrl(url) {
        if (!url) return false;
        try {
            const u = String(url);
            for (const p of URL_BLOCK_PATTERNS) {
                if (u.indexOf(p) !== -1) return true;
            }
            if (u.includes('story') && u.includes('seen')) return true;
            if (u.includes('reel') && u.includes('seen')) return true;
        } catch (e) {}
        return false;
    }

    function bodyContainsViewSeen(body) {
        if (!body) return false;
        try {
            if (typeof body === 'string') {
                return body.indexOf('viewSeenAt') !== -1;
            }
            if (body instanceof FormData) {
                for (const pair of body.entries()) {
                    try {
                        if (String(pair[1]).indexOf('viewSeenAt') !== -1) return true;
                    } catch (e) {}
                }
            }
            return String(body).indexOf('viewSeenAt') !== -1;
        } catch (e) { return false; }
    }

    (function patchFetch() {
        if (!window.fetch) return;
        const origFetch = window.fetch.bind(window);
        window.fetch = async function (input, init) {
            try {
                let url = '';
                let bodyText = '';

                if (typeof input === 'string') {
                    url = input;
                } else if (input instanceof Request) {
                    url = input.url;
                    try {
                        bodyText = await input.clone().text().catch(() => '');
                    } catch (e) {
                        bodyText = '';
                    }
                }

                if (init && init.body) {
                    if (typeof init.body === 'string') bodyText = init.body;
                    else if (init.body instanceof FormData) {
                        for (const pair of init.body.entries()) {
                            if (String(pair[1]).includes('viewSeenAt')) {
                                bodyText = String(pair[1]);
                                break;
                            }
                        }
                    } else {
                        try { bodyText = String(init.body); } catch (e) { bodyText = ''; }
                    }
                }

                if (shouldBlockUrl(url) || (bodyText && bodyText.includes('viewSeenAt'))) {
                    console.info('[IG anon] blocked fetch ->', url || '(Request object)', bodyText ? 'body contains viewSeenAt' : '');
                    return Promise.resolve(new Response(null, {
                        status: 204,
                        statusText: 'No Content (blocked by userscript)'
                    }));
                }
            } catch (e) {
            }
            return origFetch(input, init);
        };
    })();

    (function patchXHR() {
        const OriginalXHR = window.XMLHttpRequest;
        if (!OriginalXHR) return;

        function PatchedXHR() {
            const xhr = new OriginalXHR();

            const origOpen = xhr.open;
            const origSend = xhr.send;

            xhr.__user_url = null;
            xhr.__shouldBlockByUserscript = false;

            xhr.open = function (method, url) {
                try {
                    xhr.__user_url = url;
                    if (shouldBlockUrl(url)) {
                        xhr.__shouldBlockByUserscript = true;
                    }
                } catch (e) {}
                return origOpen.apply(this, arguments);
            };

            xhr.send = function (body) {
                try {
                    if (xhr.__shouldBlockByUserscript || bodyContainsViewSeen(body)) {
                        console.info('[IG anon] blocked XHR ->', xhr.__user_url || '(unknown)', bodyContainsViewSeen(body) ? 'body contains viewSeenAt' : '');
                        setTimeout(() => {
                            try {
                                try { xhr.readyState = 4; } catch (e) {}
                                try { Object.defineProperty(xhr, 'status', { value: 204, configurable: true }); } catch (e) {}
                                try { Object.defineProperty(xhr, 'responseText', { value: '', configurable: true }); } catch (e) {}
                                if (typeof xhr.onreadystatechange === 'function') {
                                    try { xhr.onreadystatechange(); } catch (e) {}
                                }
                                try { xhr.dispatchEvent(new Event('load')); } catch (e) {}
                            } catch (e) {}
                        }, 0);
                        return; 
                    }
                } catch (e) {
                }
                return origSend.apply(this, arguments);
            };

            return xhr;
        }

        PatchedXHR.prototype = OriginalXHR.prototype;
        window.XMLHttpRequest = PatchedXHR;
    })();

    console.info('Script active - watching for viewSeenAt patterns');
})();
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