WASM exposed query() function uses golang doh-client which hardcodes defacto default DOH path component

[adam-burns]

Referring to query() in wrapper_js.go:

dohurl also supports receiving a full url but actually only takes the host from that. we would need to patch github.com/shynome/doh-client for it to construct it's url differently here https://github.com/shynome/doh-client/blob/3b78e35dadc53df5cf253bde3692e59507584a92/conn.go#L30

Originally posted by @cryptix in #58 (comment)

[adam-burns]

It's good that dohurl supports the full URL, as the JS function findDOHEndpoint() in pure.js in its current form picks up the dohUrl as a single URL string, not as components. Javascipt should only query our SVCB RR entries for each enabled zone which will work as long as the defacto example path in RFC8484 is used, which is also used as the default path in BIND9 and its DOH configuration.

Issue raised in doh-client project shynome/doh-client#1.

[adam-burns]

Issue in doh-client fixed in shynome/doh-client@5d1eb76 by allowing server variable to be a URL, and if so, ingests the whole endpoint, including the path component.