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    Referrer-Policy

    この記事はまだボランティアによって 日本語 に翻訳されていません。ぜひ MDN に参加して翻訳を手伝ってください！

    The Referrer-Policy HTTP header governs which referrer information, sent in the Referer header, should be included with requests made.

    Header type Response header
    Forbidden header name no

    Syntax

    Note that Referer is actually a misspelling of the word "referrer". The Referrer-Policy header does not share this misspelling.

    Referer-Policy: "no-referrer" 
Referer-Policy: "no-referrer-when-downgrade" 
Referer-Policy: "origin" 
Referer-Policy: "origin-when-cross-origin"
Referer-Policy: "same-origin" 
Referer-Policy: "strict-origin" 
Referer-Policy: "strict-origin-when-cross-origin" 
Referer-Policy: "unsafe-url"

    Directives

    "no-referrer"
    The Referer header will be omitted entirely. No referrer information is sent along with requests.
    "no-referrer-when-downgrade" (default)
    This is the user agent's default behavior if no policy is specified. The origin is sent as referrer to a-priori as-much-secure destination (HTTPS->HTTPS), but isn't sent to a less secure destination (HTTPS->HTTP).
    "origin"
    Only send the origin of the document as the referrer in all cases.
    The document https://example.com/page.html will send the referrer https://example.com/.
    "origin-when-cross-origin"
    Send a full URL when performing a same-origin request, but only send the origin of the document for other cases.
    "same-origin"
    A referrer will be send for same-site origins, but cross-origin requests will contain no referrer information.
    "strict-origin"
    Only send the origin of the document as the referrer to a-priori as-much-secure destination (HTTPS->HTTPS), but don't send it to a less secure destination (HTTPS->HTTP).
    "strict-origin-when-cross-origin"
    Send a full URL when performing a same-origin request, only send the origin of the document to a-priori as-much-secure destination (HTTPS->HTTPS), and send no header to a less secure destination (HTTPS->HTTP).
    "unsafe-url"
    Send a full URL (stripped from parameters) when performing a a same-origin or cross-origin request.
    This policy will leak origins and paths from TLS-protected resources to insecure origins. Carefully consider the impact of this setting.

    Examples

    Policy Document Navigation to Referrer
    no-referrer https://example.com/page.html any domain or path no referrer
    no-referrer-when-downgrade https://example.com/page.html https://example.com/otherpage.html https://example.com/page.html
    no-referrer-when-downgrade https://example.com/page.html https://mozilla.org https://example.com/page.html
    no-referrer-when-downgrade https://example.com/page.html http://example.org no referrer
    origin https://example.com/page.html any domain or path https://example.com/
    origin-when-cross-origin https://example.com/page.html https://example.com/otherpage.html https://example.com/page.html
    origin-when-cross-origin https://example.com/page.html https://mozilla.org https://example.com/
    origin-when-cross-origin https://example.com/page.html http://example.com/page.html https://example.com/
    same-origin https://example.com/page.html https://example.com/otherpage.html https://example.com/page.html
    same-origin https://example.com/page.html https://mozilla.org no referrer
    strict-origin https://example.com/page.html https://mozilla.org https://example.com/
    strict-origin https://example.com/page.html http://example.org no referrer
    strict-origin http://example.com/page.html any domain or path https://example.com/
    strict-origin-when-cross-origin https://example.com/page.html https://example.com/otherpage.html https://example.com/page.html
    strict-origin-when-cross-origin https://example.com/page.html https://mozilla.org https://example.com/
    strict-origin-when-cross-origin https://example.com/page.html http://example.org no referrer
    unsafe-url https://example.com/page.html any domain or path https://example.com/page.html

    Specifications

    Specification Status
    Referrer Policy Editor's draft

    Browser compatibility

    Feature Chrome Edge Firefox Internet Explorer Opera Safari Servo
    Basic SupportNo support1No support50.0No supportNo supportNo supportNo support
    same-originNo supportNo support52.0No supportNo supportNo support?
    strict-originNo supportNo support52.0No supportNo supportNo support?
    strict-origin-when-cross-originNo supportNo support52.0No supportNo supportNo support?
    Feature Android Chrome for Android Edge Mobile Firefox for Android IE Mobile Opera Mobile Safari Mobile
    Basic SupportNo supportNo supportNo support50.0No supportNo supportNo support
    same-originNo supportNo supportNo support52.0No supportNo supportNo support
    strict-originNo supportNo supportNo support52.0No supportNo supportNo support
    strict-origin-when-cross-originNo supportNo supportNo support52.0No supportNo supportNo support

    1. See Chromium bug 619228.

    See also

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