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Meta referrer
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:
neveralwaysorigindefault
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">