adelinn/socketio-hook

Hook socket.io websocket connection to send raw requests

socketio-hook

Just paste this code in the console or use an extension such as Tampermonkey to auto-inject it.

(function() {
    'use strict';
    window._socketIoHookPromises = {};
    window.globalSendNo=5;
    WebSocket.prototype._send = WebSocket.prototype.send;
    WebSocket.prototype.send = function(data, ...otherData) {
        if(this.url.indexOf("socket.io")===-1) {
            this._send(data, ...otherData);
            this.send = this._send;
            return;
        }
        window.ws = this;
        console.log('%c Sent:', 'color: #bada55', data, ...otherData);
        this._send(data, ...otherData);
        this.send = function(_data, ..._otherData) {
            if(_data != "2probe" && _data != "2" && _data != "5") console.log('%c Sent:', 'color: #bada55', _data, ..._otherData);
            this._send(_data, ..._otherData);
        };
        this._onmessage = this.onmessage;
        this.onmessage = function(_data) {
            if (_data.data != "3probe" && _data.data != "3") {
                let delim = _data.data.indexOf("["), jsonData = _data.data.slice(delim), code = _data.data.slice(0,delim), sendNo=code.slice(0,2)=='43'?parseInt(code.slice(2),10):-1;
                try {
                    var parsed = JSON.parse(jsonData ? jsonData : "[]");
                    if(sendNo>=0 && window._socketIoHookPromises[sendNo]) {
                        window._socketIoHookPromises[sendNo](parsed[1]);
                        delete window._socketIoHookPromises[sendNo];
                    } else console.log('%c Got:', 'color: #fa5a55', parseInt(_data.data,10), parsed);
                    if(parsed[0].stack) console.error(parsed[0].stack);
                    else if(parsed[0].message) console.error((parsed[0].name?parsed[0].name:"UnknownError")+": "+parsed[0].message);
                    window.lastResponse=JSON.parse(jsonData ? jsonData : "[]");
                } catch(e) {};
            }
            this._onmessage(_data);
        };
    };
    window.sioSend = async function(dataArray){
        window.ws._send("42"+window.globalSendNo+JSON.stringify(dataArray));
        return await new Promise((r,e)=>{
            window._socketIoHookPromises[window.globalSendNo++]=r;
        });
    }
})();