XmlhttpRequest Hook
// ==UserScript==
// @name XmlhttpRequest Hook
// @namespace http://tampermonkey.net/
// @version 0.1
// @description try to take over the world!
// @author You
// @match https://bbs.tampermonkey.net.cn/*
// @grant none
// ==/UserScript==
function addXMLRequestCallback(callback){
var oldSend, i;
if( XMLHttpRequest.callbacks ) {
// we've already overridden send() so just add the callback
XMLHttpRequest.callbacks.push( callback );
} else {
// create a callback queue
XMLHttpRequest.callbacks = [callback];
// store the native send()
oldSend = XMLHttpRequest.prototype.send;
// override the native send()
XMLHttpRequest.prototype.send = function(){
// process the callback queue
// the xhr instance is passed into each callback but seems pretty useless
// you can't tell what its destination is or call abort() without an error
// so only really good for logging that a request has happened
// I could be wrong, I hope so...
// EDIT: I suppose you could override the onreadystatechange handler though
for( i = 0; i < XMLHttpRequest.callbacks.length; i++ ) {
XMLHttpRequest.callbacks[i]( this );
}
// call the native send()
oldSend.apply(this, arguments);
}
}
}
// e.g.
addXMLRequestCallback( function( xhr ) {
xhr.addEventListener("load", function(){
if ( xhr.readyState == 4 && xhr.status == 200 ) {
console.log( xhr.responseURL );
}
});
});