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anot.js/src/30-filters.js

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/*********************************************************************
* 自带过滤器 *
**********************************************************************/
var rscripts = /<script[^>]*>([\S\s]*?)<\/script\s*>/gim
var ron = /\s+(on[^=\s]+)(?:=("[^"]*"|'[^']*'|[^\s>]+))?/g
var ropen = /<\w+\b(?:(["'])[^"]*?(\1)|[^>])*>/gi
var rsanitize = {
a: /\b(href)\=("javascript[^"]*"|'javascript[^']*')/gi,
img: /\b(src)\=("javascript[^"]*"|'javascript[^']*')/gi,
form: /\b(action)\=("javascript[^"]*"|'javascript[^']*')/gi
}
var rsurrogate = /[\uD800-\uDBFF][\uDC00-\uDFFF]/g
var rnoalphanumeric = /([^\#-~| |!])/g
function numberFormat(number, decimals, point, thousands) {
//form http://phpjs.org/functions/number_format/
//number 必需,要格式化的数字
//decimals 可选,规定多少个小数位。
//point 可选,规定用作小数点的字符串(默认为 . )。
//thousands 可选,规定用作千位分隔符的字符串(默认为 , ),如果设置了该参数,那么所有其他参数都是必需的。
number = (number + '').replace(/[^0-9+\-Ee.]/g, '')
var n = !isFinite(+number) ? 0 : +number,
prec = !isFinite(+decimals) ? 3 : Math.abs(decimals),
sep = thousands || ',',
dec = point || '.',
s = '',
toFixedFix = function(n, prec) {
var k = Math.pow(10, prec)
return '' + (Math.round(n * k) / k).toFixed(prec)
}
// Fix for IE parseFloat(0.55).toFixed(0) = 0;
s = (prec ? toFixedFix(n, prec) : '' + Math.round(n)).split('.')
if (s[0].length > 3) {
s[0] = s[0].replace(/\B(?=(?:\d{3})+(?!\d))/g, sep)
}
if ((s[1] || '').length < prec) {
s[1] = s[1] || ''
s[1] += new Array(prec - s[1].length + 1).join('0')
}
return s.join(dec)
}
var filters = (Anot.filters = {
uppercase: function(str) {
return str.toUpperCase()
},
lowercase: function(str) {
return str.toLowerCase()
},
//字符串截取超过指定长度以mark标识接上
truncate: function(str, len, mark) {
len = len || 30
mark = typeof mark === 'string' ? mark : '...'
return str.slice(0, len) + (str.length <= len ? '' : mark)
},
//小值秒数转化为 时间格式
time: function(str) {
str = str >> 0
var s = str % 60
var m = Math.floor(str / 60)
var h = Math.floor(m / 60)
m = m % 60
m = m < 10 ? '0' + m : m
s = s < 10 ? '0' + s : s
if (h > 0) {
h = h < 10 ? '0' + h : h
return h + ':' + m + ':' + s
}
return m + ':' + s
},
$filter: function(val) {
for (var i = 1, n = arguments.length; i < n; i++) {
var array = arguments[i]
var fn = Anot.filters[array[0]]
if (typeof fn === 'function') {
var arr = [val].concat(array.slice(1))
val = fn.apply(null, arr)
}
}
return val
},
camelize: camelize,
//https://www.owasp.org/index.php/XSS_Filter_Evasion_Cheat_Sheet
// <a href="javasc&NewLine;ript&colon;alert('XSS')">chrome</a>
// <a href="data:text/html;base64, PGltZyBzcmM9eCBvbmVycm9yPWFsZXJ0KDEpPg==">chrome</a>
// <a href="jav ascript:alert('XSS');">IE67chrome</a>
// <a href="jav&#x09;ascript:alert('XSS');">IE67chrome</a>
// <a href="jav&#x0A;ascript:alert('XSS');">IE67chrome</a>
xss: function(str) {
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return str.replace(rscripts, '').replace(ropen, function(a, b) {
var match = a.toLowerCase().match(/<(\w+)\s/)
if (match) {
//处理a标签的href属性img标签的src属性form标签的action属性
var reg = rsanitize[match[1]]
if (reg) {
a = a.replace(reg, function(s, name, value) {
var quote = value.charAt(0)
return name + '=' + quote + 'javascript:void(0)' + quote // jshint ignore:line
})
}
}
return a.replace(ron, ' ').replace(/\s+/g, ' ') //移除onXXX事件
})
},
escape: function(str) {
//将字符串经过 str 转义得到适合在页面中显示的内容, 例如替换 < 为 &lt
return String(str)
.replace(/&/g, '&amp;')
.replace(rsurrogate, function(value) {
var hi = value.charCodeAt(0)
var low = value.charCodeAt(1)
return '&#' + ((hi - 0xd800) * 0x400 + (low - 0xdc00) + 0x10000) + ';'
})
.replace(rnoalphanumeric, function(value) {
return '&#' + value.charCodeAt(0) + ';'
})
.replace(/</g, '&lt;')
.replace(/>/g, '&gt;')
},
currency: function(amount, symbol, fractionSize) {
return (
(symbol || '\u00a5') +
numberFormat(amount, isFinite(fractionSize) ? fractionSize : 2)
)
},
number: numberFormat,
//日期格式化类似php的date函数
date: function(stamp, str) {
var oDate = stamp
if (!Date.isDate(oDate)) {
var tmp = +oDate
if (tmp === tmp) {
oDate = tmp
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}
oDate = new Date(oDate)
if (oDate.toString() === 'Invalid Date') {
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return 'Invalid Date'
}
}
return oDate.format(str)
}
})