http

LEORChn JavaScript HTTP Lib

Dieses Skript sollte nicht direkt installiert werden. Es handelt sich hier um eine Bibliothek für andere Skripte, welche über folgenden Befehl in den Metadaten eines Skriptes eingebunden wird // @require https://update.greasyfork.org/scripts/401997/797848/http.js 

function http(){
	var pointer = 0,
		method, url, formed, dofun, dofail, onprogress;
	arr(arguments).forEach(function(e){
		switch(pointer){
			case 0:
				e = e.split(' ', 2); // 允许在第一个参数中用空格将 http-method 与 url 隔开，而省去 引号+逗号+引号 的麻烦
				method = e[0].toUpperCase();
				if(e.length > 1){
					pointer++; // 偏移到下一个
					e = e[1];
				}else break;
			case 1: url = e; break;
			case 2:
				if(e instanceof Function){ // 允许不添加 http-body 而直接撰写行为。
					pointer++; // 偏移到下一个
				}else{
					formed = e;
					break;
				}
			case 3: dofun = e; break;
			case 4: dofail = e; break;
			case 5: onprogress = e;
		}
		pointer++;
	});
	var x = 'ActiveXObject' in window?
		new ActiveXObject("Microsoft.XMLHTTP"):
		new XMLHttpRequest();
	if(location.protocol.includes('https'))
		url=url.replace('^http:', 'https:');
	x.open(method, url, true);
	x.timeout=60000;
	x.responseType="text"; // IE要求先open才能设置timeout和responseType
	x.onload=dofun;
	x.ontimeout=x.onerror= dofail? dofail: null;
	x.onprogress=onprogress;
	if(formed)
		x.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded; charset=UTF-8'); // TODO: 暂不明确IE是否适用
	x.send(formed?formed:'');
}
function httpj(){
	var a = arr(arguments);
	if(!a[0].includes(' ')){
		a[0] += ' ' + a[1];
		a.splice(1, 1);
	}
	if(a[1] instanceof Function) a.splice(1, 0, null); // 如果 method+url 之后不是 String 而是 Function，判断为 onSuccess，将一个 null 插入到 formed
	while(a.length < 5) a[a.length] = null; // 在剩下的空位填满null
	// 始终转换为如此格式：0=method+url, 1=formed, 2=onSuccess, 3=onFail, 4=onProgress
	http(a[0], a[1], // method+url, formed
		function(){
			var j,
				stat = this.status,
				resp = this.responseText;
			try{
				j = eval('('+ (resp || '{}') +')');
			}catch(e){}
			if(Array.isArray(j)) // JSON Array
				j = { stat:stat, data:j }
			else if(j instanceof Object) // JSON Object
				j.stat = stat;
			else // Nothing, text/plain
				j = { stat:stat, data:resp }
			a[2](j);
		},
		a[3], a[4]); // fail, progress
}

// edit: 2020-3-20 2:21
// edit: 2020-4-26 3:50