library for log ajax requests and save logs as a file
此腳本不應該直接安裝，它是一個供其他腳本使用的函式庫。欲使用本函式庫，請在腳本 metadata 寫上： // @require https://update.greasyfork.org/scripts/39403/258004/ajax%20log.js
// ==UserScript==
// @name ajax log
// @namespace https://greasyfork.org/users/174399
// @description library for log ajax requests and save logs as a file
// @version 0.5.1
// ==/UserScript==
(function(window){
var DEBUG = false;
var tracker = {},
proto = window.XMLHttpRequest.prototype,
eventList = ['readystatechande', 'load'],
methodList = ['open', 'send', 'setRequestHeader', 'abort'],
attrList = ['readyState', 'status', 'statusText', 'response'],
totalResponse = [],
flushAndSave = null,
blank = function(){},
log = function(){window.console.log.apply(this, arguments);},
clog = blank,
link;
if( DEBUG )
clog = log;
methodList.forEach(function(m){
tracker[m] = {
'original': null,
'ready': null,
};
});
function setTracker(type, fun)
{
var t = tracker[type];
if(!t || t.ready)
return;
t.original = proto[type];
proto[type] = function()
{
fun.apply(this, arguments);
t.original.apply(this, arguments);
};
t.ready = true;
}
setTracker('open', function(method, url, async){
var req = this,
cntx = getVal(req, 'context'),
time = getVal(cntx, 'time');
clog("[open] req: ", req);
cntx.method = method.toUpperCase();
cntx.url = getLocation(url, 'href');
cntx.async = (async === undefined ? null: async);
time.msec = Date.now();
time.date = getDate();
var aEL = req.addEventListener;
req.addEventListener = function(ev, cb)
{
clog("[addEventListener] ", aEL, [].slice(arguments));
if(eventList.indexOf(ev) == -1)
aEL.apply(req, arguments);
};
});
setTracker('setRequestHeader', function(name, val){
var cntx = getVal(this, 'context'),
headers = getVal(cntx, 'headers');
clog("[header] " + name + ": " + val);
headers[name] = val;
});
setTracker('abort', function(){
var cntx = getVal(this, 'context');
cntx.onabort = true;
});
setTracker('send', function(data){
var req = this,
cntx = getVal(req, 'context');
cntx.data = toObj(data);
clog("[send] context: ", JSON.stringify(cntx, null, 2));
clog("[send] req: ", req);
var rsc = req.onreadystatechange;
var ld = req.onload || blank;
clog("[onreadystatechange] ", rsc);
req.onreadystatechange = function(e)
{
var t = e.target;
if(t.readyState == 4 )
{
clog("[onreadystatechange] response: ", t.response);
var cntx = getVal(t, 'context'),
o = getVal(cntx, 'onreadystatechange'),
time = getVal(o, 'time');
setResponse(o, t);
time.msec = Date.now();
time.date = getDate();
o.responseHeaders = getHeaders(t);
totalResponse.push(extend({}, cntx) );
saveLog();
}
rsc.apply(req, arguments);
};
clog("[onload] ", ld);
req.onload = function(e)
{
var t = e.target,
cntx = getVal(t, 'context'),
o = getVal(cntx, 'onload'),
time = getVal(o, 'time');
clog("[onload] response: ", t.response);
setResponse(o, t);
o.responseHeaders = getHeaders(t);
time.msec = Date.now();
time.date = getDate();
totalResponse.push(extend({}, cntx) );
saveLog();
ld.apply(req, arguments);
};
});
function extend(t, o)
{
t = t || {};
var k, v;
for(k in o)
{
v = o[k];
if( v !== undefined && o.hasOwnProperty(k) )
t[k] = v;
}
return t;
}
function setResponse(o, t)
{
for(var k of attrList)
o[k] = t[k];
return o;
}
function getHeaders(t)
{
var headers = t.getAllResponseHeaders(), o = {}, s, h, p;
s = headers.split(/[\r\n]+/g);
for(h of s)
{
h = h.split(': ');
p = h[0] || '';
if( !(p = p.trim()) )
continue;
o[p] = h.slice(1).join(': ');
}
return o;
}
function keyboard(e)
{
if(!e.shiftKey)
return;
var code = e.keyCode || e.which,
ch = String.fromCharCode(code).toUpperCase();
switch(ch)
{
case 'S':
flushAndSave = true;
saveLog();
break;
case 'D':
clog = (DEBUG = !DEBUG) ? log : blank;
break;
}
}
window.addEventListener('keydown', function(e){keyboard(e);});
function saveLog()
{
if( totalResponse.length && flushAndSave )
{
saveFile('xmlHttpRequest-' + getDate() + '.txt',
createFile(JSON.stringify(totalResponse, null, 2), 'text/plain; charset=UTF-8'));
totalResponse.length = 0;
flushAndSave = false;
}
}
function pad(num, len){return ('000000000000' + num).slice(-len);}
function getDate(date)
{
date = date || new Date();
return '' +
date.getFullYear() + '-' +
pad(date.getMonth() + 1, 2) + '-' +
pad(date.getDate(), 2) + '@' +
pad(date.getHours(), 2) + '-' +
pad(date.getMinutes(), 2) + '-' +
pad(date.getSeconds(), 2) + '.' +
pad(date.getMilliseconds(), 3);
}
function saveFile(name, resource)
{
var a = document.createElement('a');
a.href = resource;
a.download = name;
document.querySelector('body').appendChild(a);
a.click();
a.parentNode.removeChild(a);
}
function createFile(data, type)
{
var wu = window.URL || window.webkitURL,
b = new Blob([data], {type: type}),
u = wu.createObjectURL(b);
setTimeout(function(){wu.revokeObjectURL(b);}, 1e4);
return u;
}
function toObj(str)
{
if( !str )
return null;
switch(typeof str)
{
case 'object': return str;
case 'string':
var o = {}, s = str.split('&'), v, p;
for(p of s)
{
v = p.split('=');
o[v[0]] = v[1] || '';
}
return o;
default: return null;
}
}
function getLocation(url, p)
{
link = link || document.createElement('a');
link.href = url;
return link[p||'href'];
}
function getVal(obj, name)
{
var c = obj[name] = obj[name] || {};
return c;
}
})(window);