I'm attempting to learn to set a JS cookie that expires after one day, but our client is reporting intermittent results with this. Am I missing something? Is there a better way to go about doing this?
Honestly, I'd also be open to setting a session cookie to alleviate the problem, but I figured I'd see if someone spotted an error in the way we're doing this here first.
Thank you!
(function($){
checkCookie();
function setCookie(cname, cvalue, exdays) {
var d = new Date();
d.setTime(d.getTime() + (exdays * 24 * 60 * 60 * 1000));
var expires = "expires=" + d.toUTCString();
document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/";
}
function getCookie(cname) {
var name = cname + "=";
var ca = document.cookie.split(';');
for (var i = 0; i < ca.length; i++) {
var c = ca[i];
while (c.charAt(0) == ' ') {
c = c.substring(1);
}
if (c.indexOf(name) == 0) {
return c.substring(name.length, c.length);
}
}
return "";
}
function checkCookie() {
var noShowWelcome = getCookie("sameSessionSKF");
if (!noShowWelcome) {
$('#home-alert').modal({
fadeDuration: 500
});
setCookie('sameSessionSKF', true, 1); // sets to expire after 1 day
}
}
})(jQuery);
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
Instead of expires you can specify Max-Age, which is the number of seconds until the cookie expires.
const maxAge = 86400
document.cookie = cname + "=" + cvalue + ";Max-Age=" + maxAge + ";path=/";
Related
I would like to load my url using javascript, Where my url is required authorization token. The token already saved in cookies with the following code.
<script>
function setCookie(cname,cvalue,exdays) {
var d = new Date();
d.setTime(d.getTime() + (exdays*24*60*60*1000));
var expires = "expires=" + d.toGMTString();
document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/";
}
function getCookie(cname) {
var name = cname + "=";
var decodedCookie = decodeURIComponent(document.cookie);
var ca = decodedCookie.split(';');
for(var i = 0; i < ca.length; i++) {
var c = ca[i];
while (c.charAt(0) == ' ') {
c = c.substring(1);
}
if (c.indexOf(name) == 0) {
return c.substring(name.length, c.length);
}
}
return "";
}
</script>
And able to get saved token from cookies successfully but not able to apply for my url load which is required authentication token.
Can any one suggest me a way to load url with authorization token from cookies.
NOTE: I can not pass the authorization token in url as parameter.
Here is my url loading code:
<script>
function newDoc() {
window.location.assign("https://mydomine.com/Viewer?type=xyz")
}
</script>
If you are trying to set the cookie for a different domain, then you'll need to add the domain information to the cookie.
function setCookie(cname, cvalue, exdays, domain) {
var d = new Date();
d.setTime(d.getTime() + (exdays * 24 * 60 * 60 * 1000));
var expires = "expires=" + d.toGMTString();
var cookie = cname + "=" + cvalue + ";" + expires + ";path=/";
// Add the domain, if specified.
if (domain) {
cookie += `;domain={domain}`
}
document.cookie = cookie;
}
I am currently writing the cookies for the tag manager.
I found some good sources about creating cookies e.g in w3school. And I have a several question about the script:
1, For the last row of code in the setCookie function, does it means that the value e.g the number, will be stored in the variable document.cookie until it expires?
document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/";
2, For the last row of code in the getCookie function
if (c.indexOf(name) == 0) {
return c.substring(name.length, c.length);
}
What does it stand for?
3, Why there is a return "" at the end of the getCookie function?
The full code is as follows:
checkCookie()
function checkCookie() {
var user = getCookie("username");
if (user != "") {
alert("Welcome again " + user);
} else {
user = prompt("Please enter your name:", "");
if (user != "" && user != null) {
setCookie("username", user, 365);
}
}
}
function setCookie(cname, cvalue, exdays) {
var d = new Date();
d.setTime(d.getTime() + (exdays * 24 * 60 * 60 * 1000));
var expires = "expires="+d.toUTCString();
document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/";
}
function getCookie(cname) {
var name = cname + "=";
var ca = document.cookie.split(';');
for(var i = 0; i < ca.length; i++) {
var c = ca[i];
while (c.charAt(0) == ' ') {
c = c.substring(1);
}
if (c.indexOf(name) == 0) {
return c.substring(name.length, c.length);
}
}
return "";
}
Many thanks for your help!
This getCookie function code is from https://www.w3schools.com/js/js_cookies.asp
function getCookie(cname) {
var name = cname + "=";
var decodedCookie = decodeURIComponent(document.cookie);
var ca = decodedCookie.split(';');
for(var i = 0; i <ca.length; i++) {
var c = ca[i];
while (c.charAt(0) == ' ') {
c = c.substring(1);
}
if (c.indexOf(name) == 0) {
return c.substring(name.length, c.length);
}
}
return "";
}
The part which I cannot understand easily is decodedCookie
var decodedCookie = decodeURIComponent(document.cookie);
I've already searched for articles about decodeURIComponent,
and It decodes the encodedURIComponent.
But since theres no encoded cookie, why decodeURIComponent(document.cookie) needed?
function setCookie(cname, cvalue, exdays) {
var d = new Date();
d.setTime(d.getTime() + (exdays * 24 * 60 * 60 * 1000));
var expires = "expires="+ d.toUTCString();
document.cookie = cname + "=" + cvalue + ";" + expires + ";path=/";
}
This is the code of setcookie function from w3schools, and they didnt set the cookie withencodeURIComponent`.
So... why?
I need some detailed explanation! Thanks!
It is already mentioned in the tutorial:
Decode the cookie string, to handle cookies with special characters, e.g. '$'
But since we do not have '$' then you can remove it with no effect here.
Set Cookie function in Jquery
function setCookie(cookieName, cookieValue, cookieExpireDays) {
var d = new Date();
d.setTime(d.getTime() + (cookieExpireDays * 24 * 60 * 60 * 1000));
var expires = "expires=" + d.toUTCString();
document.cookie = cookieName + "=" + cookieValue + ";" + expires + ";" + "path=/";
}
Delete function in Jquery
function deleteCookie(name) {
var domain = location.hostname,
path = '/'; // root path
document.cookie = [
name, '=',
'; expires=' + new Date(0).toUTCString(),
'; path=' + path,
'; domain=' + domain
].join('');
}
This works fine for local links, but when I try to use it on external websites. I can get my document.cookie but deleteCookie function does not delete the cookie. Any ideas?
*Please remember, I am just running these scripts from console of Google Chrome
I might be misunderstanding something in your question, but here's how I handled the getting, setting, and deleting of a cookie I set.
fiddle: https://jsfiddle.net/hmvyu3L6/
<button class='set'>set</button>
<button class='get'>get</button>
<button class='delete'>delete</button>
function setCookie(cname, cvalue, exdays) {
var d = new Date();
d.setTime(d.getTime() + (exdays * 24 * 60 * 60 * 1000));
var expires = 'expires=' + d.toUTCString();
document.cookie = cname + '=' + cvalue + '; ' + expires;
}
function getCookie(cname) {
var name = cname + '=',
ca = document.cookie.split(';');
for (var i = 0; i < ca.length; i++) {
var c = ca[i];
while (c.charAt(0) == ' ') {
c = c.substring(1);
}
if (c.indexOf(name) == 0) {
return c.substring(name.length,c.length);
}
}
return '';
}
function deleteCookie( name ) {
document.cookie = name + '=; expires=Thu, 01 Jan 1970 00:00:01 GMT;';
}
var value = 'hey there';
$('.set').on('click', function() {
setCookie('testCookie', value, 360);
});
$('.get').on('click', function() {
console.log(getCookie('testCookie'));
});
$('.delete').on('click', function() {
deleteCookie('testCookie');
});
If the cookies are HttpOnly, you will not be able to delete them using javascript or jquery.
Make sure your domain and path match exactly. If they are different (e.g. .subdomain.domain.com instead of .domain.com, or /path instead of /) then the script will not affect the cookies.
Alright, I am answering my own question because I changed few things and it works now.
var domain = location.hostname
function setCookie(cookiename, cookievalue, expiredays, domain) {
var date = new Date();
date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
var expires = "; expiredays=" + date.toGMTString();
document.cookie = cookiename+ "=" + cookievalue+ expires + "; domain=" + domain + "; path=/";
}
function deleteCookie(cookiename, domain) {
setCookie(cookiename, "", -1, domain);
}
deleteCookie("Cookie_Name",domain)
I have set a cookie using the following and it works well. I can see it in browser cookie(console).
But how can i get back the value from cookie ??
days = 1;
cookiename = 'uid';
cookieValue = result.pp.uid;
if (days) {
var date = new Date();
date.setTime(date.getTime() + (days * 24 * 60 * 60 * 1000));
var expires = "; expires=" + date.toGMTString();
}else var expires = "";
document.cookie = cookiename + "=" + cookieValue + expires + "; path=/";
I have the following code , but i dont want to use the function.
function readCookie(name) {
var nameEQ = name + "=";
var ca = document.cookie.split(';');
for(var i=0;i < ca.length;i++) {
var c = ca[i];
while (c.charAt(0)==' ') c = c.substring(1,c.length);
if (c.indexOf(nameEQ) == 0) return c.substring(nameEQ.length,c.length);
}
return null;
}
Ive no idea of how they are getting the value of cookie..
Is there a simple way like document.cookie ?
Try this library
https://github.com/carhartl/jquery-cookie
Also see this SO post
How do I set/unset cookie with jQuery?
Example from their docs
Read cookie:
$.cookie('the_cookie'); // => "the_value"
$.cookie('not_existing'); // => undefined