scriptlets.js

/// no-rufus.js
(function() {
    const xhrInstances = new WeakMap();
    let arg1 = '{{1}}';
    if ( arg1 === '{{1}}' ) { arg1 = ''; }
    const needles = [];
    for ( const condition of arg1.split(/\s+/) ) {
        if ( condition === '' ) { continue; }
        const pos = condition.indexOf(':');
        let key, value;
        if ( pos !== -1 ) {
            key = condition.slice(0, pos);
            value = condition.slice(pos + 1);
        } else {
            key = 'url';
            value = condition;
        }
        if ( value === '' ) {
            value = '^';
        } else if ( value.startsWith('/') && value.endsWith('/') ) {
            value = value.slice(1, -1);
        } else {
            value = value.replace(/[.*+?^${}()|[\]\\]/g, '\\$&');
        }
        needles.push({ key, re: new RegExp(value) });
    }
    const log = needles.length === 0 ? console.log.bind(console) : undefined;
    self.XMLHttpRequest = class extends self.XMLHttpRequest {
        open(...args) {
            if ( log !== undefined ) {
                log(`uBO: xhr.open(${args.join(', ')})`);
            } else {
                const argNames = [ 'method', 'url' ];
                const haystack = new Map();
                for ( let i = 0; i < args.length && i < argNames.length; i++  ) {
                    haystack.set(argNames[i], args[i]);
                }
                if ( haystack.size !== 0 ) {
                    let matches = true;
                    for ( const { key, re } of needles ) {
                        matches = re.test(haystack.get(key) || '');
                        if ( matches === false ) { break; }
                    }
                    if ( matches ) {
                        xhrInstances.set(this, haystack);
                    }
                }
            }
            return super.open(...args);
        }
        send(...args) {
            const haystack = xhrInstances.get(this);
            if ( haystack === undefined ) {
                return super.send(...args);
            }
            Object.defineProperties(this, {
                readyState: { value: 4, writable: false },
                response: { value: '', writable: false },
                responseText: {
                    get() {
                        return "event:CONTEXT_CHUNK\nid:0\ndata:{\"requestContext\":{},\"bsr\":null}\n\nevent:close\nid:EOF\ndata:\n\n";
                    }
                },
                responseURL: { value: haystack.get('url'), writable: false },
                responseXML: { value: '', writable: false },
                status: { value: 200, writable: false },
                statusText: { value: 'OK', writable: false },
            });
            this.dispatchEvent(new Event('readystatechange'));
            this.dispatchEvent(new Event('load'));
            this.dispatchEvent(new Event('loadend'));
        }
    };
})();