Adding "Link" Header

[António P. P. Almeida]

On 9 Fev 2012 22h43 WET, nginx-forum at nginx.us wrote:

> To avoid SEO issues on my subdomains, I need to add a "Link" header
> to support Google's canonical header.  The format is as follows
> (from
> http://googlewebmastercentral.blogspot.com/2011/06/supporting-relcanonical-http-headers.html):
>
> Link: <http://www.example.com/white-paper.html>; rel="canonical"
>
> So, the add_header command would need to reference $uri, but it also
> needs a semi-colon and double quotes.  How can I add this header to
> my config?

add_header Link "<$scheme://$http_host$request_uri>; rel=\"canonical\""; 

--- appa