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Put the If-None-Match: * requirement on the server #292

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Aug 4, 2021
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Put the If-None-Match: * requirement on the server #292

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Put the If-None-Match: * requirement on the server
kjetilk Aug 2, 2021
a8b625f
Update protocol.html
kjetilk Aug 3, 2021
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2 changes: 1 addition & 1 deletion protocol.html
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Expand Up @@ -637,7 +637,7 @@ <h3 property="schema:name">Writing Resources</h3>

<p>Servers MUST NOT allow HTTP <code>POST</code>, <code>PUT</code> and <code>PATCH</code> to update a container’s containment triples; if the server receives such a request, it MUST respond with a <code>409</code> status code. [<a href="https://github.com/solid/specification/issues/40#issuecomment-573358652" rel="cito:citesAsSourceDocument">Source</a>]</p>

<p>Clients MAY use the HTTP <code>If-None-Match</code> header with a value of <code>"*"</code> to prevent an unsafe request method (e.g., <code>PUT</code>, <code>PATCH</code>) from inadvertently modifying an existing representation of the target resource when the client believes that the resource does not have a current representation. [<a href="https://github.com/solid/specification/issues/108#issuecomment-567272797" rel="cito:citesAsSourceDocument">Source</a>] [<a href="https://github.com/solid/specification/issues/40#issuecomment-566995240" rel="cito:citesAsSourceDocument">Source</a>]</p>
<p class="note" role="note"><span>Note:</span>Clients are encouraged to use the HTTP <code>If-None-Match</code> header with a value of <code>"*"</code> to prevent an unsafe request method (e.g., <code>PUT</code>, <code>PATCH</code>) from inadvertently modifying an existing representation of the target resource when the client believes that the resource does not have a current representation. [<a href="https://github.com/solid/specification/issues/108#issuecomment-567272797" rel="cito:citesAsSourceDocument">Source</a>] [<a href="https://github.com/solid/specification/issues/40#issuecomment-566995240" rel="cito:citesAsSourceDocument">Source</a>] [<a href="https://github.com/solid/specification/pull/292" rel="cito:citesAsSourceDocument">Source</a>]</p>

<p>Servers MAY use the HTTP <code>ETag</code> header with a strong validator for RDF bearing representations in order to encourage clients to opt-in to using the <code>If-Match</code> header in their requests.</p>
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