86 lines
3.9 KiB
JavaScript
86 lines
3.9 KiB
JavaScript
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/**
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* Utility class for setting/reading values from browser cookies.
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* Values can be written using the {@link #set} method.
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* Values can be read using the {@link #get} method.
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* A cookie can be invalidated on the client machine using the {@link #clear} method.
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*/
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Ext.define('Ext.util.Cookies', {
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singleton: true,
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/**
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* Creates a cookie with the specified name and value. Additional settings for the cookie may be optionally specified
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* (for example: expiration, access restriction, SSL).
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* @param {String} name The name of the cookie to set.
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* @param {Object} value The value to set for the cookie.
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* @param {Object} [expires] Specify an expiration date the cookie is to persist until. Note that the specified Date
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* object will be converted to Greenwich Mean Time (GMT).
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* @param {String} [path] Setting a path on the cookie restricts access to pages that match that path. Defaults to all
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* pages ('/').
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* @param {String} [domain] Setting a domain restricts access to pages on a given domain (typically used to allow
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* cookie access across subdomains). For example, "sencha.com" will create a cookie that can be accessed from any
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* subdomain of sencha.com, including www.sencha.com, support.sencha.com, etc.
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* @param {Boolean} [secure] Specify true to indicate that the cookie should only be accessible via SSL on a page
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* using the HTTPS protocol. Defaults to false. Note that this will only work if the page calling this code uses the
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* HTTPS protocol, otherwise the cookie will be created with default options.
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*/
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set : function(name, value){
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var argv = arguments,
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argc = arguments.length,
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expires = (argc > 2) ? argv[2] : null,
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path = (argc > 3) ? argv[3] : '/',
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domain = (argc > 4) ? argv[4] : null,
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secure = (argc > 5) ? argv[5] : false;
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document.cookie = name + "=" +
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escape(value) +
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((expires === null) ? "" : ("; expires=" + expires.toUTCString())) +
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((path === null) ? "" : ("; path=" + path)) +
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((domain === null) ? "" : ("; domain=" + domain)) +
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((secure === true) ? "; secure" : "");
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},
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/**
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* Retrieves cookies that are accessible by the current page. If a cookie does not exist, `get()` returns null. The
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* following example retrieves the cookie called "valid" and stores the String value in the variable validStatus.
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*
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* var validStatus = Ext.util.Cookies.get("valid");
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*
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* @param {String} name The name of the cookie to get
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* @return {Object} Returns the cookie value for the specified name;
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* null if the cookie name does not exist.
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*/
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get : function(name) {
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var parts = document.cookie.split('; '),
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len = parts.length,
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item, i, ret;
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// In modern browsers, a cookie with an empty string will be stored:
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// MyName=
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// In older versions of IE, it will be stored as:
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// MyName
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// So here we iterate over all the parts in an attempt to match the key.
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for (i = 0; i < len; ++i) {
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item = parts[i].split('=');
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if (item[0] === name) {
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ret = item[1];
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return ret ? unescape(ret) : '';
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}
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}
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return null;
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},
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/**
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* Removes a cookie with the provided name from the browser
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* if found by setting its expiration date to sometime in the past.
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* @param {String} name The name of the cookie to remove
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* @param {String} [path] The path for the cookie.
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* This must be included if you included a path while setting the cookie.
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*/
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clear : function(name, path){
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if (this.get(name)) {
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path = path || '/';
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document.cookie = name + '=' + '; expires=Thu, 01-Jan-1970 00:00:01 GMT; path=' + path;
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}
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}
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});
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