使用JavaScript的基于Cookie的重定向 [英] Cookie based Redirection using Javascript

问题描述

我试图基于cookie存在创建重定向.因此，当用户首次连接到我的网站jonathanstevens.org时，他们将被重定向到jonathanstevens.org/landing

I'm attempting to create a redirect based on a cookie existence. So when a user connects to my website jonathanstevens.org for the first time, they are redirected to jonathanstevens.org/landing

代码部分:

<script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>

Global.js

Global.js

function create_cookie(name, value, days) {
    var expires = "";
    if (days) {
        var date = new Date();
        date.setTime( date.getTime() + (days*24*60*60*1000) );
        expires = "; expires=" + date.toGMTString();
    }
    document.cookie = name + "=" + value + expires + "; path=/";
}

function get_cookie(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;
}

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>

Index.html

Index.html

<!-- redirect to landing page -->
<script>
  // Redirect to landing page if 'form_submitted' cookie does not exist
  if (get_cookie('secondvisit') === 'undefined') {
    window.location.href = "landing.html";
  }
</script>

landing.html

landing.html

<!-- Adds second Visit cookie -->
<script>
	jQuery(document).ready(function($) {
    // Create cookie so that the user is no longer redirected
    create_cookie('secondvisit', 'true', 30);
	});
</script>

预期结果是检查Cookie，然后将我转发到我的登录页面(如果未定义).关于我做错了什么的任何想法?

The expected result was it to check for a cookie, then forward me to my landing page if it wasn't defined. Any ideas on what I've done wrong?

推荐答案

当您从函数get_cookie

Index.html

Index.html

<!-- redirect to landing page -->
<script>
  // Redirect to landing page if 'form_submitted' cookie does not exist
  if (get_cookie('secondvisit') === null) {
    window.location.href = "landing.html";
  }
</script>

除此之外，您应该使用这个图书馆确实是一个很好的工具，易于使用见下文

Apart from this you should use this library really good one an easy to work with see below

创建一个cookie，该cookie在整个网站上均有效:

Cookies.set('name', 'value');

创建一个从现在起7天到期的cookie，该cookie在整个网站上均有效:

Cookies.set('name', 'value', { expires: 7 });

创建一个有效的cookie，该cookie对当前页面的路径有效:

Cookies.set('name', 'value', { expires: 7, path: '' });

读取cookie:

Cookies.get('name'); // => 'value'
Cookies.get('nothing'); // => undefined

读取所有可见的Cookie:

Cookies.get(); // => { name: 'value' }

删除Cookie:

Cookies.remove('name');

删除对当前页面路径有效的cookie:

Cookies.set('name', 'value', { path: '' });
Cookies.remove('name'); // fail!
Cookies.remove('name', { path: '' }); // removed! 

---

编辑

使用js.cookie库的代码转换后的版本如下所示.

A converted version of your code using js.cookie library will look like following.

(注意:我已经测试了此代码，并且可以正常工作，请确保您正确包含了库，并且控制台上没有错误.)

Index.html

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/js-cookie@2/src/js.cookie.min.js"></script>
<!-- redirect to landing page -->
<script>
    $(document).ready(function () {
        if (typeof Cookies.get('secondvisit') === 'undefined') {
            window.location.href = "landing.html";
        }
    })
    // Redirect to landing page if 'form_submitted' cookie does not exist
</script>

landing.html

<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<script src="https://cdn.jsdelivr.net/npm/js-cookie@2/src/js.cookie.min.js"></script>
<!-- Adds second Visit cookie -->
<script>
    jQuery(document).ready(function () {
        // Create cookie so that the user is no longer redirected
        var a = Cookies.set('secondvisit', 'true', {
            expires: 7
        });
    });
</script>

这篇关于使用JavaScript的基于Cookie的重定向的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！