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Difference between revisions of "Meta referrer"

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(Semantics)
(Semantics)
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===Semantics===
 
===Semantics===
  
If the ''directive'' is a string other than <code>default</code>, then replace Step 3 of ''Fetching resources'' in the HTML standard [HTML] with the following text:
+
Replace Step 3 of ''Fetching resources'' in the HTML standard [HTML] with the following text:
  
 
<blockquote>
 
<blockquote>
TODO
+
Let the ''referrer-header-value'' be the document's ''current address of document''.
 +
 
 +
Remove any <fragment> component from the ''referrer-header-value''.
 +
 
 +
If the ''origin'' of the appropriate Document is not a scheme/host/port tuple, then replace the ''referrer-header-value'' with the empty string, regardless of its value.
 +
 
 +
If the ''referrer-policy'' is <code>never</code>:
 +
 
 +
* Replace the ''referrer-header-value'' with the empty string, regardless of its value.
 +
 
 +
If the ''referrer-policy'' is <code>default</code>:
 +
 
 +
* Replace the ''referrer-header-value'' with the empty string if the <scheme> component of the ''referrer-header-value'' represents a protocol that uses transport-layer security and the <scheme> component of the ''
 +
 
 +
 
 
</blockquote>
 
</blockquote>
  

Revision as of 22:09, 25 October 2011

Overview

This document describes a proposal the "referrer" metadata name. Using the referrer metadata attribute, a document can control the behavior if the Referer HTTP header attached to requests that originate from the document.

Specification

Syntax

Keyword: referrer

The referrer metadata attribute can have one of four values:

  • never
  • always
  • origin
  • default

Let referrer-policy be the value of the content attribute with LWS stripped from the beginning and end of the string and converted to lower case. If referrer-policy is none of the strings listed above, the user agent MUST act as if referrer-policy is the string default.

Semantics

Replace Step 3 of Fetching resources in the HTML standard [HTML] with the following text:

Let the referrer-header-value be the document's current address of document.

Remove any <fragment> component from the referrer-header-value.

If the origin of the appropriate Document is not a scheme/host/port tuple, then replace the referrer-header-value with the empty string, regardless of its value.

If the referrer-policy is never:

  • Replace the referrer-header-value with the empty string, regardless of its value.

If the referrer-policy is default:

  • Replace the referrer-header-value with the empty string if the <scheme> component of the referrer-header-value represents a protocol that uses transport-layer security and the <scheme> component of the


Examples

This meta element instructs the user agent to omit the Referer header in all HTTP requests that originate from the document containing the element:

<meta name="referrer" content="never">

This meta element instructs the user agent to include the document's origin in the Referer header rather than the full URL of the document.

<meta name="referrer" content="origin">