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Used :rfc: role in various docs.
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@@ -15,21 +15,17 @@ or you can rely on the :class:`~django.middleware.http.ConditionalGetMiddleware`
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middleware to set the ``ETag`` header.
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When the client next requests the same resource, it might send along a header
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such as either `If-modified-since`_ or `If-unmodified-since`_, containing the
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date of the last modification time it was sent, or either `If-match`_ or
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`If-none-match`_, containing the last ``ETag`` it was sent.
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If the current version of the page matches the ``ETag`` sent by the client, or
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if the resource has not been modified, a 304 status code can be sent back,
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instead of a full response, telling the client that nothing has changed.
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such as either :rfc:`If-modified-since <7232#section-3.3>` or
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:rfc:`If-unmodified-since <7232#section-3.4>`, containing the date of the last
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modification time it was sent, or either :rfc:`If-match <7232#section-3.1>` or
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:rfc:`If-none-match <7232#section-3.2>`, containing the last ``ETag`` it was
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sent. If the current version of the page matches the ``ETag`` sent by the
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client, or if the resource has not been modified, a 304 status code can be sent
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back, instead of a full response, telling the client that nothing has changed.
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Depending on the header, if the page has been modified or does not match the
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``ETag`` sent by the client, a 412 status code (Precondition Failed) may be
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returned.
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.. _If-match: https://tools.ietf.org/html/rfc7232#section-3.1
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.. _If-none-match: https://tools.ietf.org/html/rfc7232#section-3.2
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.. _If-modified-since: https://tools.ietf.org/html/rfc7232#section-3.3
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.. _If-unmodified-since: https://tools.ietf.org/html/rfc7232#section-3.4
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When you need more fine-grained control you may use per-view conditional
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processing functions.
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