Behavior for other SPARQL Update operations #323
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ericprud
approved these changes
Oct 16, 2021
| @@ -709,7 +709,7 @@ <h3 property="schema:name">Writing Resources</h3> | |||
| <span about="" id="server-patch-sparql-all" rel="spec:requirement" resource="#server-patch-sparql-all"><span property="spec:statement"> <span rel="spec:requirementSubject" resource="spec:Server">Servers</span> <span rel="spec:requirementLevel" resource="spec:MAY">MAY</span> further support SPARQL 1.1 Update [<cite><a class="bibref" href="#bib-sparql-overview">SPARQL</a></cite>],</span></span> | |||
| <span about="" id="server-patch-sparql-not-other" rel="spec:requirement" resource="#server-patch-sparql-not-other"><span property="spec:statement"> except that <span rel="spec:requirementSubject" resource="spec:Server">servers</span> <span rel="spec:requirementLevel" resource="spec:MUSTNOT">MUST NOT</span> allow a request with a <code>PATCH</code> method to change other resources than the target resource.</span></span> [<a href="https://github.com/solid/specification/issues/125#issuecomment-873035679" rel="cito:citesAsSourceDocument">Source</a>] | |||
| <span about="" id="server-patch-sparql-outside-subset" rel="spec:requirement" resource="#server-patch-sparql-outside-subset"><span property="spec:statement"><span rel="spec:requirementSubject" resource="spec:Server">Servers</span> that receives a request body containing a SPARQL query that falls outside of the subset they are able to process <span rel="spec:requirementLevel" resource="spec:MUST">MUST</span> respond with a <code>422</code> status code [<cite><a class="bibref" href="#bib-rfc4918">RFC4918</a></cite>] and a message body that explains the error.</span></span> | |||
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| <span about="" id="server-patch-sparql-not-update" rel="spec:requirement" resource="#server-patch-sparql-not-update"><span property="spec:statement">SPARQL Update [<cite><a class="bibref" href="#bib-sparql-overview">SPARQL</a></cite>] also defines operations <code>LOAD</code>, <code>CLEAR</code>, <code>CREATE</code>, <code>DROP</code>, <code>COPY</code>, <code>MOVE</code> and <code>ADD</code>. <span rel="spec:requirementSubject" resource="spec:Server">Servers</span> that receives a <code>PATCH</code> request body containing these operations <span rel="spec:requirementLevel" resource="spec:SHOULD">SHOULD</span> respond with a <code>422</code> status code [<cite><a class="bibref" href="#bib-rfc4918">RFC4918</a></cite>] and a message body that explains the error, or MUST ensure that any access control measures apply.</span></span> | |||
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or MUST ensure that any access control measures apply.
The 'or' there is slightly confusing -- shouldn't that be an 'and'?
TallTed
reviewed
Nov 10, 2021
| @@ -709,7 +709,7 @@ <h3 property="schema:name">Writing Resources</h3> | |||
| <span about="" id="server-patch-sparql-all" rel="spec:requirement" resource="#server-patch-sparql-all"><span property="spec:statement"> <span rel="spec:requirementSubject" resource="spec:Server">Servers</span> <span rel="spec:requirementLevel" resource="spec:MAY">MAY</span> further support SPARQL 1.1 Update [<cite><a class="bibref" href="#bib-sparql-overview">SPARQL</a></cite>],</span></span> | |||
| <span about="" id="server-patch-sparql-not-other" rel="spec:requirement" resource="#server-patch-sparql-not-other"><span property="spec:statement"> except that <span rel="spec:requirementSubject" resource="spec:Server">servers</span> <span rel="spec:requirementLevel" resource="spec:MUSTNOT">MUST NOT</span> allow a request with a <code>PATCH</code> method to change other resources than the target resource.</span></span> [<a href="https://github.com/solid/specification/issues/125#issuecomment-873035679" rel="cito:citesAsSourceDocument">Source</a>] | |||
| <span about="" id="server-patch-sparql-outside-subset" rel="spec:requirement" resource="#server-patch-sparql-outside-subset"><span property="spec:statement"><span rel="spec:requirementSubject" resource="spec:Server">Servers</span> that receives a request body containing a SPARQL query that falls outside of the subset they are able to process <span rel="spec:requirementLevel" resource="spec:MUST">MUST</span> respond with a <code>422</code> status code [<cite><a class="bibref" href="#bib-rfc4918">RFC4918</a></cite>] and a message body that explains the error.</span></span> | |||
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| <span about="" id="server-patch-sparql-not-update" rel="spec:requirement" resource="#server-patch-sparql-not-update"><span property="spec:statement">SPARQL Update [<cite><a class="bibref" href="#bib-sparql-overview">SPARQL</a></cite>] also defines operations <code>LOAD</code>, <code>CLEAR</code>, <code>CREATE</code>, <code>DROP</code>, <code>COPY</code>, <code>MOVE</code> and <code>ADD</code>. <span rel="spec:requirementSubject" resource="spec:Server">Servers</span> that receives a <code>PATCH</code> request body containing these operations <span rel="spec:requirementLevel" resource="spec:SHOULD">SHOULD</span> respond with a <code>422</code> status code [<cite><a class="bibref" href="#bib-rfc4918">RFC4918</a></cite>] and a message body that explains the error, or MUST ensure that any access control measures apply.</span></span> | |||
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Suggested change
| <span about="" id="server-patch-sparql-not-update" rel="spec:requirement" resource="#server-patch-sparql-not-update"><span property="spec:statement">SPARQL Update [<cite><a class="bibref" href="#bib-sparql-overview">SPARQL</a></cite>] also defines operations <code>LOAD</code>, <code>CLEAR</code>, <code>CREATE</code>, <code>DROP</code>, <code>COPY</code>, <code>MOVE</code> and <code>ADD</code>. <span rel="spec:requirementSubject" resource="spec:Server">Servers</span> that receives a <code>PATCH</code> request body containing these operations <span rel="spec:requirementLevel" resource="spec:SHOULD">SHOULD</span> respond with a <code>422</code> status code [<cite><a class="bibref" href="#bib-rfc4918">RFC4918</a></cite>] and a message body that explains the error, or MUST ensure that any access control measures apply.</span></span> | |
| <span about="" id="server-patch-sparql-not-update" rel="spec:requirement" resource="#server-patch-sparql-not-update"><span property="spec:statement">SPARQL Update [<cite><a class="bibref" href="#bib-sparql-overview">SPARQL</a></cite>] also defines operations <code>LOAD</code>, <code>CLEAR</code>, <code>CREATE</code>, <code>DROP</code>, <code>COPY</code>, <code>MOVE</code> and <code>ADD</code>. <span rel="spec:requirementSubject" resource="spec:Server">Servers</span> that receives a <code>PATCH</code> request body containing these operations (1) <span rel="spec:requirementLevel" resource="spec:SHOULD">SHOULD</span> respond with a <code>422</code> status code [<cite><a class="bibref" href="#bib-rfc4918">RFC4918</a></cite>] and a message body that explains the error, and (2) MUST ensure that any access control measures apply.</span></span> |
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As noted in #125, SPARQL Update contains several operations beyond DELETE and INSERT. It has been an open question what to do with them. Since they are not currently supported and thus falls outside of the supported subset, I suggest we simply disallow them on a SHOULD level.
I think we should review this soon with respect to
COPYandMOVEin light of #19 , but I think this is the most straightforward way to address it right now.I made this a separate PR to not tie up #320, but I hope we can get it in for completeness.