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iron-cookie.html
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iron-cookie.html
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<!doctype html>
<!-- @license
iron-cookie, a Polymer element for managing cookies.
Copyright (C) 2016 Kevin Boxhoorn
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
-->
<link rel="import" href="../polymer/polymer.html">
<script>
/**
* Polymer element for managing cookies.
* @demo
*/
class IronCookieElement extends Polymer.Element {
static get is() { return "iron-cookie" }
static get properties() {
return {
/**
* Name of the cookie to manipulate.
*/
name: {
type: String,
observer: "_nameChanged"
},
/**
* Value of the cookie.
*/
value: {
type: String,
notify: true,
observer: "_setCookieWrapper"
},
/**
* Length of time to keep the cookie before expiring it. Can be a
* `Number` of days, UTC time `String`, or `Object` with values
* corresponding to the arguments of the JavaScript `Date`
* contructor (e.g. `{ year: 2018, month: 11, day: 31 }`).
* See [this](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Date) for more info.
* @type {String|Number|Object}
*/
expires: {
type: Object,
observer: "_setCookieWrapper"
},
/**
* URL path that the cookie is available to.
*/
path: {
type: String,
value: "/"
},
/**
* Toggles the `secure` flag of the cookie. This makes it only get
* sent with HTTPS requests.
*/
secure: {
type: Boolean,
observer: "_setCookieWrapper",
value: false
},
/**
* Whether to encode and decode the cookie using `encodeURIComponent`
* and `decodeURIComponent`. This allows values such as `;` and `=`
* to be a part of the cookie without it being corrupted.
* Recommended if data bound to user input.
*/
uriSafe: {
type: Boolean,
value: false
},
/**
* Get the cookie manually using the `getCookie` method. This
* disables automatically loading the cookie when the element is
* initialized.
*/
manualGet: {
type: Boolean,
value: false
},
/**
* Set the cookie manually using the `setCookie` method. This
* disables automatically setting the cookie when `value` changes.
*/
manualSet: {
type: Boolean,
value: false
}
};
}
_nameChanged() {
this.value = this._getCookie();
}
_getCookie(force=false) {
if (this.manualGet && !force)
return "";
var name = this.name + "=";
var cookies = document.cookie.split(";");
for(var i = 0; i < cookies.length; i++) {
var cookie = cookies[i];
while (cookie.charAt(0) == " ")
cookie = cookie.substring(1);
if (cookie.indexOf(name) == 0) {
cookie = cookie.substring(name.length, cookie.length);
return this.uriSafe ? decodeURIComponent(cookie) : cookie;
}
}
return "";
}
_setCookie(force=false) {
if (this.manualSet && !force)
return;
if (this.name === undefined || this.value === undefined)
return;
var date = new Date();
var expiresTime;
if (typeof this.expires == "number")
expiresTime = this.expires * 24 * 60 * 60 * 1000;
else if (typeof this.expires == "string")
expiresTime = new Date(this.expires).getTime();
else if (typeof this.expires == "object")
expiresTime = new Date(this.expires.year, this.expires.month, this.expires.day, this.expires.hour, this.expires.minutes, this.expires.seconds, this.expires.milliseconds).getTime();
date.setTime(date.getTime() + (expiresTime || 0));
var value = this.value;
if (this.uriSafe)
value = encodeURIComponent(this.value);
if (typeof value != "string")
return;
else if (value.indexOf(";") > 0 || value.indexOf("=") > 0)
throw new Error("`value` cannot contain ';' or '=' characters when `uriSafe` is not true");
var cookie = this.name + "=" + value;
if (expiresTime != undefined)
cookie += "; expires=" + date.toUTCString();
cookie += "; path=" + this.path;
if (this.secure)
cookie += "; secure";
document.cookie = cookie;
}
/**
* Stops arguments being passed from observers.
*/
_setCookieWrapper() {
this._setCookie();
}
/**
* Sets the cookie. Only useful when manualSet is true.
*/
setCookie() {
this._setCookie(true);
}
/**
* Gets the cookie. Only useful when manualGet is true.
*/
getCookie() {
this.value = this._getCookie(true);
}
}
customElements.define(IronCookieElement.is, IronCookieElement);
</script>