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Meta referrer

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Revision as of 21:48, 25 October 2011 by Abarth (talk | contribs) (Syntax)

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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

If the directive is a string other than default, then Step 3 of Fetching resources in the HTML standard [HTML] is altered as follows:

  • never:

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">