mirror of https://github.com/calzoneman/sync.git
103 lines
2.7 KiB
JavaScript
103 lines
2.7 KiB
JavaScript
module.exports = {
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isValidChannelName: function (name) {
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return name.match(/^[\w-_]{1,30}$/);
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},
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isValidUserName: function (name) {
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return name.match(/^[\w-_]{1,20}$/);
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},
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randomSalt: function (length) {
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var chars = "abcdefgihjklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"
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+ "0123456789!@#$%^&*_+=~";
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var salt = [];
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for(var i = 0; i < length; i++) {
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salt.push(chars[parseInt(Math.random()*chars.length)]);
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}
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return salt.join('');
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},
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maskIP: function (ip) {
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if(ip.match(/^\d+\.\d+\.\d+\.\d+$/)) {
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// standard 32 bit IP
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return ip.replace(/\d+\.\d+\.(\d+\.\d+)/, "x.x.$1");
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} else if(ip.match(/^\d+\.\d+\.\d+/)) {
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// /24 range
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return ip.replace(/\d+\.\d+\.(\d+)/, "x.x.$1.*");
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}
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},
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formatTime: function (sec) {
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if(sec === "--:--")
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return sec;
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sec = Math.floor(+sec);
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var h = "", m = "", s = "";
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if(sec >= 3600) {
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h = "" + Math.floor(sec / 3600);
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if(h.length < 2)
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h = "0" + h;
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sec %= 3600;
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}
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m = "" + Math.floor(sec / 60);
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if(m.length < 2)
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m = "0" + m;
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s = "" + (sec % 60);
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if(s.length < 2)
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s = "0" + s;
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if(h === "")
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return [m, s].join(":");
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return [h, m, s].join(":");
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},
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newRateLimiter: function () {
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return {
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count: 0,
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lastTime: 0,
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throttle: function (opts) {
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if (typeof opts === "undefined")
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opts = {};
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var burst = +opts.burst,
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sustained = +opts.sustained,
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cooldown = +opts.cooldown;
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if (isNaN(burst))
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burst = 10;
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if (isNaN(sustained))
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sustained = 2;
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if (isNaN(cooldown))
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cooldown = burst / sustained;
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// Haven't reached burst cap yet, allow
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if (this.count < burst) {
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this.count++;
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this.lastTime = Date.now();
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return false;
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}
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// Cooled down, allow and clear buffer
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if (this.lastTime < Date.now() - cooldown*1000) {
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this.count = 0;
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this.lastTime = Date.now();
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return false;
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}
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var diff = Date.now() - this.lastTime;
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if (diff < 1000/sustained)
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return true;
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this.lastTime = Date.now();
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return false;
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}
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};
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}
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};
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