Hola
hawaiian050:
Cuelgo aquí el código para que todos lo podamos leer:
Código PHP:
// JavaScript Document<SCRIPT LANGUAGE="JavaScript1.1">
// The constructor function: creates a cookie object for the specified
// document, with a specified name and optional attributes.
// Arguments:
// document: the Document object that the cookie is stored for. Required.
// name: a string that specifies a name for the cookie. Required.
// hours: an optional number that specifies the number of hours from now
// that the cookie should expire.
// path: an optional string that specifies the cookie path attribute.
// domain: an optional string that specifies the cookie domain attribute.
// secure: an optional Boolean value that, if true, requests a secure cookie.
//
function Cookie(document, name, hours, path, domain, secure)
{
// All the predefined properties of this object begin with '$'
// to distinguish them from other properties which are the values to
// be stored in the cookie.
this.$document = document;
this.$name = name;
if (hours)
this.$expiration = new Date((new Date()).getTime() + hours*3600000);
else this.$expiration = null;
if (path) this.$path = path; else this.$path = null;
if (domain) this.$domain = domain; else this.$domain = null;
if (secure) this.$secure = true; else this.$secure = false;
}
// This function is the store() method of the Cookie object.
function _Cookie_store()
{
// First, loop through the properties of the Cookie object and
// put together the value of the cookie. Since cookies use the
// equals sign and semicolons as separators, we'll use colons
// and ampersands for the individual state variables we store
// within a single cookie value. Note that we escape the value
// of each state variable, in case it contains punctuation or other
// illegal characters.
var cookieval = "";
for(var prop in this) {
// Ignore properties with names that begin with '$' and also methods.
if ((prop.charAt(0) == '$') || ((typeof this[prop]) == 'function'))
continue;
if (cookieval != "") cookieval += '&';
cookieval += prop + ':' + escape(this[prop]);
}
// Now that we have the value of the cookie, put together the
// complete cookie string, which includes the name, and the various
// attributes specified when the Cookie object was created.
var cookie = this.$name + '=' + cookieval;
if (this.$expiration)
cookie += '; expires=' + this.$expiration.toGMTString();
if (this.$path) cookie += '; path=' + this.$path;
if (this.$domain) cookie += '; domain=' + this.$domain;
if (this.$secure) cookie += '; secure';
// Now store the cookie by setting the magic Document.cookie property.
this.$document.cookie = cookie;
}
// This function is the load() method of the Cookie object.
function _Cookie_load()
{
// First, get a list of all cookies that pertain to this document.
// We do this by reading the magic Document.cookie property.
var allcookies = this.$document.cookie;
if (allcookies == "") return false;
// Now extract just the named cookie from that list.
var start = allcookies.indexOf(this.$name + '=');
if (start == -1) return false; // cookie not defined for this page.
start += this.$name.length + 1; // skip name and equals sign.
var end = allcookies.indexOf(';', start);
if (end == -1) end = allcookies.length;
var cookieval = allcookies.substring(start, end);
// Now that we've extracted the value of the named cookie, we've
// got to break that value down into individual state variable
// names and values. The name/value pairs are separated from each
// other with ampersands, and the individual names and values are
// separated from each other with colons. We use the split method
// to parse everything.
var a = cookieval.split('&'); // break it into array of name/value pairs
for(var i=0; i < a.length; i++) // break each pair into an array
a[i] = a[i].split(':');
// Now that we've parsed the cookie value, set all the names and values
// of the state variables in this Cookie object. Note that we unescape()
// the property value, because we called escape() when we stored it.
for(var i = 0; i < a.length; i++) {
this[a[i][0]] = unescape(a[i][1]);
}
// We're done, so return the success code.
return true;
}
// This function is the remove() method of the Cookie object.
function _Cookie_remove()
{
var cookie;
cookie = this.$name + '=';
if (this.$path) cookie += '; path=' + this.$path;
if (this.$domain) cookie += '; domain=' + this.$domain;
cookie += '; expires=Fri, 02-Jan-1970 00:00:00 GMT';
this.$document.cookie = cookie;
}
// Create a dummy Cookie object, so we can use the prototype object to make
// the functions above into methods.
new Cookie();
Cookie.prototype.store = _Cookie_store;
Cookie.prototype.load = _Cookie_load;
Cookie.prototype.remove = _Cookie_remove;
Al parecer es una clase que es capaz de manejar cookies, con tres métodos (
store,
load y
remove). Si buscas javascript+cookies en google encontrarás funciones que hacen lo mismo de una manera más simple.
Saludos.
27/08/2008, 13:49
