When to a complete website, a form or a page, multiple URL addresses are forwarded then this is known as URL redirection. There are various goals of redirection:

  • If your site is under maintenance then you can take the help of temporary redirects.
  • If the URL of your site has been changed then for preserving the bookmarks or existing links you can take the help of permanent redirects.

What is the principle behind the working of redirects?

Whenever there is a request for redirection then to send a response of redirection to it the server triggers a redirect in HTTP. There is a Location header and status codes in the redirect responses. The URL to be redirected is present in the Location header and with a number 3 the status codes begin. The Location header provides a new URL which is immediately loaded by the browser at the time of redirection.

How many types of redirects are there?

The redirection has been categorized into 3 categories which are as follows:

1.Temporary redirections

2.Permanent redirections

3.Special redirections

Temporary redirections

On various occasions, a different place is used for accessing the resource that has been requested but a canonical location can’t access that resource. Here we can use the temporary redirects. The URL that is temporary and new is not memorized by the various crawlers and search engine robots. Showing those progress pages that are temporary at the time of creation, an update or deletion of the resources can be made possible by using temporary redirects. The various redirects that come under temporary redirection are:

  • 302 – It is used when because of unforeseen reasons there is temporary unavailability of the web page.
  • 303 – To prevent the re-triggering of the operation at the time of page refresh this redirect is used.
  • 307 – It is used when because of unforeseen reasons there is temporary unavailability of the web page. When the site has an availability of non-GET operations, then at that time 307 performs better than 302.

Permanent redirections

The redirects that stay forever are known as permanent redirects. Their purpose is to use a new URL in place of the original URL. For the resource, the original URL will be updated by the various crawlers, RSS readers and robots of the search engine. The various redirects that come under permanent redirection are:

  • 301 – It is used for the purpose of website recognization.
  • 308 – When a site has an availability of non-GET operations, then at that time this redirect is used for the purpose of website recognization.

Special redirections

304 and 300 are 2 types of special redirects. For redirecting manually, a 300 redirect is used and for redirecting to a copy that is locally cached a 304 redirect is used.

Specifying redirections by using alternative ways

For defining the redirections, the 2 alternative ways are as follows:

1.Using DOM for JavaScript redirections

2.Using <meta> element for HTML redirections

JavaScript redirections

If you want a new page to load by using a property known as window.location then you have to set a URL string that comes under JavaScript redirections.

window.location = “https://abc.com/”;

HTML redirections

When the server goes out of control at the time of redirection then you can take the help of the HTTP redirects. Here within the page <head> a setting of Refresh is made for the http-equiv attribute of the <meta> element and <meta> element itself.

<head>

    <meta http-equiv=”Refresh” content=”0;  URL=https://abc.com/”>

</head>

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