(Imported from GitHub issues)

GreenReaper:
When I ran this query in Firefox Nightly and selected Graph Builder from the 👁 display dropdown at the lower left, I got a "polestar" embedded UI which showed only #Count as a selectable field.

On reviewing this in Developer Tools, it is performing the desired query against query.wikidata.org, not the local endpoint.

This may be because within https://furry.wiki.opencura.com/query/js/wdqs.min.551842a5a1d280d61114.js is this fragment:

wikibase.queryService.ui.resultBrowser.PolestarResultBrowser = function (i, a, e) {
  'use strict';
  function t() {
  }
  return (t.prototype = new wikibase.queryService.ui.resultBrowser.AbstractResultBrowser).draw = function (e) {
    var t = {
      url: 'wikidatasparql://query.wikidata.org/?query=' + location.hash.substr(1),
      name: 'Imported from Wikidata Query Service',
      _directEmbed: !0
    },

This looks like it's the GRAPH_QUERY_PREFIX mentioned in wikibase/queryService/ui/resultBrowser/PolestarResultBrowser.js#L10. See also how 'wikidatasparql' is processed.

I tried changing the embed to use the local domain and I got Error: URL hostname is not whitelisted which was from the bundled https://furry.wiki.opencura.com/query/polestar/scripts/vendor.js

This *appears* to be part of TopoJSON and I think it requires that $wgGraphAllowedDomains be set to include an array item containing the domain with the wikidatasparql key, as well as having that in the http (and/or https?) array. This is set initially here from an empty default - see a custom setting for labs. There is some discussion in T145944 which may be helpful (or not...).

I tried debugging this a bit further by setting a breakpoint in sanitizeUrl() -> sanitizeHost() and found it using this as domains[]:

geoshape: Array [ "maps.wikimedia.org" ]
​http: Array [ "wmflabs.org" ]
​https: Array(12) [ "mediawiki.org", "wikibooks.org", "wikidata.org", "wikimedia.org", "wikimediafoundation.org", "wikinews.org", "wikipedia.org", "wikiquote.org", "wikisource.org", "wikiversity.org", "wikivoyage.org", "wiktionary.org" ]
​wikidatasparql: Array [ "query.wikidata.org", "wdqs-test.wmflabs.org" ]
​wikirawupload: Array [ "upload.wikimedia.org", "upload.beta.wmflabs.org" ]

I added the following at that point:

this['domains']['https'].push('furry.wiki.opencura.com');
this['domains']['wikidatasparql'].push('furry.wiki.opencura.com');

but I got instead

Error: wikidatasparql:: URL must either be relative (wikidatasparql:///...), or use one of the allowed hosts:

When I tried another way it transformed it to

https://furry.wiki.opencura.com/bigdata/namespace/wdq/sparql?query=

when I think it needed to be

https://furry.wiki.opencura.com/query/sparql?query=

because of a line somewhere that was setting this:

.pathname = '/bigdata/namespace/wdq/sparql',

I stopped at that bit, having gone too far down the rabbit hole for a feature that isn't exactly core - also, my netbook can't handle the stress of stepping through a giant vendor.js - but I thought I should mention it, as it seems to not be working as intended.

GreenReaper:
On-wiki Graph extension SPARQL data use is also impacted, as shown in the console for this query using relative addressing:

[Vega Err] PARSE DATA FAILED: values Error: URL hostname is not whitelisted: wikidatasparql:///?query=PREFIX+rdfs%3A+%3Chttp%3A%2F%2Fwww.w3.org%2F2000%2F01%2Frdf-schema%23%3E%0APREFIX+lwb%3A+%3Chttp%3A%2F%2Fdata.lexbib.org%2Fentity%2F%3E%0APREFIX+ldp%3A+%3Chttp%3A%2F%2Fdata.lexbib.org%2Fprop%2Fdirect%2F%3E%0APREFIX+lp%3A+%3Chttp%3A%2F%2Fdata.lexbib.org%2Fprop%2F%3E%0APREFIX+lps%3A+%3Chttp%3A%2F%2Fdata.lexbib.org%2Fprop%2Fstatement%2F%3E%0APREFIX+lpq%3A+%3Chttp%3A%2F%2Fdata.lexbib.org%2Fprop%2Fqualifier%2F%3E%0A%0Aselect+%3Fs+%3FsLabel+%0A%3Frgb%0A%23%3FedgeLabel+%0A%3Fo+%3FoLabel+where+%7B%0A++%3Fs+ldp%3AP5+lwb%3AQ7.%0A++%3Fs+ldp%3AP72*+lwb%3AQ21886+.+%23+root+node+of+the+representation%2C+Q21886+for+%22Lexicography%22%0A++%3Fs+%3Fp+%3Fo+.%0A++%3Fedge+wikibase%3AdirectClaim+%3Fp+.%0A++%3Fs+rdfs%3Alabel+%3FsLabel+.%0A++%3Fedge+rdfs%3Alabel+%3FedgeLabel+.%0A++FILTER+%28strstarts%28str%28%3FedgeLabel%29%2C%22skos%3Abroader%22%29+%7C%7C+strstarts%28str%28%3FedgeLabel%29%2C%22skos%3Arelated%22%29+%7C%7C+strstarts%28str%28%3FedgeLabel%29%2C%22skos%3AcloseMatch%22%29%29%0A++%3Fo+rdfs%3Alabel+%3FoLabel+.%0A++FILTER+%28lang%28%3FoLabel%29%3D%22en%22%29%0A++%7B+select+%3Fs+%28count+%28%3Fbroader%29+as+%3Fdistance%29+where+%7B%0A++%3Fs+ldp%3AP5+lwb%3AQ7.%0A++++OPTIONAL+%7B%0A++%3Fs+ldp%3AP72%2B+%3Fbroader+.+%7D%7D+GROUP+BY+%3Fs+%3Fdistance%0A++%7D%0A++%0A++BIND+%28%0A++COALESCE%28%0A++++IF%28%3Fs+%3D+lwb%3AQ21886+%2C+%220000CC%22%2C+1%2F0%29%2C%0A++++IF%28str%28%3Fdistance%29%3D%221%22+%2C+%22FF9999%22%2C+1%2F0%29%2C%0A++++IF%28str%28%3Fdistance%29%3D%222%22+%2C+%22FFB266%22%2C+1%2F0%29%2C%0A++++IF%28str%28%3Fdistance%29%3D%223%22+%2C+%22FFFF99%22%2C+1%2F0%29%2C%0A++++IF%28str%28%3Fdistance%29%3D%224%22+%2C+%22CCFF99%22%2C+1%2F0%29%2C%0A++++IF%28str%28%3Fdistance%29%3D%225%22+%2C+%22CCFFE5%22%2C+1%2F0%29%2C%0A++++%22FFFFFF%22%0A++%29+AS+%3Frgb%0A%29%0A+++%0A++%7D+GROUP+BY+%0A++++%3Fs+%3FsLabel+%3Fdistance+%3Frgb+%0A++++%23%3FedgeLabel+%0A++++%3Fo+%3FoLabel

The user in question was unable to use the native embed.html on parent domain LexBib.org due to X-Frame-Origin: SAMEORIGIN in query server headers, and my idea was for them to put a graph on the MediaWiki side (which they could embed).

In the end they used a static image of the graph and linked to the query.