youku的js脚本的工具函数和初始化方法
定义日志输出函数
(function(){
if(window['console']){ return; }
window['console'] = {
log: function(){}
,clear: function(){}
,debug: function(){}
,error: function(){}
,info: function(){}
,count: function(){}
,time: function(){}
,trace: function(){}
,warn: function(){}
}
})();
定义全局的方法，实现加载cdn的响应的地址
(function(){
var url = 'Bad url, watch browser console error.',
Local = window.Local,
err = function(msg){ if(console && console.error){ console.error('[cdn function error] '+ msg + '.'); } },
cdn = function(path, type){
//path rule
if(path.charAt(0) != '/'){ err('@param path: relative to root start by /'); return url; }
//global block
if(!Local){ err('@see BETA-18932: template funciton {nova->globaJS}'); return url; }
var key = 'RELEASE_TAG', version = Local[key];
//version define
if(!version){ err('@see local: ' + key + ' not defined'); return url; }
//server define
key = type.toUpperCase() + 'SERVER', server = Local[key];
if(!server){ err('@see local: ' + key + ' not defined.'); return url; }
//bad server define
if(!server.match(/^(http|https)/)){ err('@see local: ' + key + ' is server, add protocol'); return url; }
if(server.match(/\/$/)){ err('@see local: ' + key + ' is server, not ending by \/'); return url; }
url = server+ '/' + version + path;
return url;
};
window.cdn_jsurl = function(path){ return cdn(path, 'js'); };
window.cdn_cssurl = function(path){ return cdn(path, 'css'); };
window.cdn_imgurl = function(path){ return cdn(path, 'img'); };
})();
全站监听连接事件
//监听全站的链接点击事件，检查是否存在data-from属性,并添加from参数至href属性中
(function(o){
if(!o) {return false;}
if(!o.Event) {return false;}
var checkFromDomain = function(href){
var domain = ["youku.com/v_show/","youku.com/show_page/","youku.com/u/U"];
for(var i=0,length=domain.length; i<length; i++){
if(href.indexOf(domain[i]) !== -1) {
return true;
}
}
}
o.nova_init_hook_data_from = function(){
o.Event.observe(document, "click", function(ev){
if(!ev) ev = o.event;
var target = ev.target || ev.srcElement;
if(!target) {return;}
if(target.tagName != 'A' && target.parentNode) {
target = target.parentNode;
}
if(target.tagName == 'A') {
var data_from = target.getAttribute("data-from");
var from = data_from || window.pvDataFrom;
var href = target.getAttribute("href");
if(from && from != '') {
if(href && href.indexOf('http') === 0 && href.indexOf('?from') === -1 && href.indexOf('&from') === -1 && checkFromDomain(href)) {
from = encodeURIComponent(from);
if(href.indexOf('?') !== -1){
target.setAttribute("href", href+'&from='+from);
}else{
target.setAttribute("href", href+'?from='+from);
}
}
}
}
});
}
})(window);
生成时间戳+6位随机数的字符串
var getPvid = function(len){
var randchar=["0","1","2","3","4","5","6","7","8","9",
"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z",
"A","B","C","D","E","F","G","H","I","J","K","L","M","N","O","P","Q","R","S","T","U","V","W","X","Y","Z"
];
var i=0;
var r="";
var d=new Date();
for (i=0;i<len;i++){
var index=parseInt(Math.random()*Math.pow(10,6))%randchar.length;
r+=randchar[index];
}
return d.getTime()+r;
}
jsonp异步调用方法
var jsonp = function(src, callback){
if(typeof(arguments[0]) != 'string'){ return; }
var callback = typeof(arguments[1]) == 'function' ? callback : function(){};
var head = document.getElementsByTagName('HEAD')[0];
var script = document.createElement('SCRIPT');
script.type = 'text/javascript';
script.src = src;
head.appendChild(script);
if(!/*@cc_on!@*/0) {
script.onload = function(){ callback(); this.parentNode.removeChild(this); }
}else{
script.onreadystatechange = function () {
if (this.readyState == 'loaded' || this.readyState == 'complete') {
callback();
this.parentNode.removeChild(this);
}
}
}
}
过滤空字符串
function ltrim(s){ return s.replace( /^(\s*| *)/, ""); }
function rtrim(s){ return s.replace( /(\s*| *)$/, ""); }
function trim(s){ return ltrim(rtrim(s));}
判断是否为空值
/**
* 判断变量是否空值
* undefined, null, '', false, 0, [], {} 均返回true，否则返回false
*/
function empty(v){
switch (typeof v){
case 'undefined' : return true;
case 'string' : if(trim(v).length == 0) return true; break;
case 'boolean' : if(!v) return true; break;
case 'number' : if(0 === v) return true; break;
case 'object' :
if(null === v) return true;
if(undefined !== v.length && v.length==0) return true;
for(var k in v){return false;} return true;
break;
}
return false;
}
根据cookie判断是否已经登录
var islogin = function(){
var username = '';
var ca = document.cookie.split(';');
for(var i=0;i < ca.length;i++) {
var c = ca[i];
while (c.charAt(0)==' ') c = c.substring(1,c.length);
if(c.indexOf('yktk=') == 0){
var u_info = decode64(decodeURIComponent(c).split("|")[3]);
if(u_info.indexOf(",") > -1 && u_info.indexOf("nn:") > -1 && u_info.indexOf("id:") > -1){
username = u_info.split(",")[1].split(":")[1];
if(username != '') break;
}
}
}
return (username == '') ? false : true;
}
判断是否为email
function isEmail(mail){
return(new RegExp(/^\w+((-\w+)|(\.\w+))*\@[A-Za-z0-9]+((\.|-)[A-Za-z0-9]+)*\.[A-Za-z]{1,4}$/).test(mail));
}
function U8_16(_1) {
var i, len, c;
var char2, char3;
var ary = [];
len = _1.length;
i = 0;
while (i < len) {
c = _1.charCodeAt(i++);
switch (c >> 4) {
case 0:
case 1:
case 2:
case 3:
case 4:
case 5:
case 6:
case 7:
// 0xxxxxxx
ary.push(_1.charAt(i - 1));
break;
case 12:
case 13:
// 110x xxxx 10xx xxxx
char2 = _1.charCodeAt(i++);
ary.push(String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F)));
break;
case 14:
// 1110 xxxx 10xx xxxx 10xx xxxx
char2 = _1.charCodeAt(i++);
char3 = _1.charCodeAt(i++);
ary.push(String.fromCharCode(((c & 0x0F) << 12) | ((char2 & 0x3F) << 6) | ((char3 & 0x3F) << 0)));
break;
}
}
return ary.join('');
}
function decode64(_1) {
if(!_1) return '';
var _2 = "ABCDEFGHIJKLMNOP"+"QRSTUVWXYZabcdef"+"ghijklmnopqrstuv"+"wxyz0123456789+/"+"=";
var _3 = "";
var _4, _5, _6;
var _7, _8, _9, _a;
var i = 0;
_1 = _1.replace(/[^A-Za-z0-9\+\/\=]/g, "");
do {
_7 = _2.indexOf(_1.charAt(i++));
_8 = _2.indexOf(_1.charAt(i++));
_9 = _2.indexOf(_1.charAt(i++));
_a = _2.indexOf(_1.charAt(i++));
_4 = (_7 << 2) | (_8 >> 4);
_5 = ((_8 & 15) << 4) | (_9 >> 2);
_6 = ((_9 & 3) << 6) | _a;
_3 = _3 + String.fromCharCode(_4);
if (_9 != 64) {
_3 = _3 + String.fromCharCode(_5);
}
if (_a != 64) {
_3 = _3 + String.fromCharCode(_6);
}
} while (i < _1.length);
return U8_16(_3);
}
function encode64(str)
{
if(!str) return '';
str = str.toString();
var base64EncodeChars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
var base64DecodeChars = new Array(
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1,
-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1,
-1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1,
-1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1
);
var out, i, len;
var c1, c2, c3;
len = str.length;
i = 0;
out = "";
while(i < len) {
c1 = str.charCodeAt(i++) & 0xff;
if(i == len)
{
out += base64EncodeChars.charAt(c1 >> 2);
out += base64EncodeChars.charAt((c1 & 0x3) << 4);
out += "==";
break;
}
c2 = str.charCodeAt(i++);
if(i == len)
{
out += base64EncodeChars.charAt(c1 >> 2);
out += base64EncodeChars.charAt(((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4));
out += base64EncodeChars.charAt((c2 & 0xF) << 2);
out += "=";
break;
}
c3 = str.charCodeAt(i++);
out += base64EncodeChars.charAt(c1 >> 2);
out += base64EncodeChars.charAt(((c1 & 0x3)<< 4) | ((c2 & 0xF0) >> 4));
out += base64EncodeChars.charAt(((c2 & 0xF) << 2) | ((c3 & 0xC0) >>6));
out += base64EncodeChars.charAt(c3 & 0x3F);
}
return out;
}
function encodeUid(uid)
{
if(!uid) return '';
if(uid << 2 > 0){
var enUid = 'U' + encode64(uid << 2);
}else{
//uid超过限制
var enUid = 'U' + encode64(uid * 4);
}
return enUid;
}
