net/url: URL.String() escapes Unicode domain

[sollniss]

Go version

go version go1.22.0 windows/amd64

Output of go env in your module/workspace:

GO111MODULE=
GOARCH=amd64
GOBIN=
GOCACHE=C:\Users\solln\AppData\Local\go-build
GOENV=C:\Users\solln\AppData\Roaming\go\env
GOEXE=.exe
GOEXPERIMENT=
GOFLAGS=
GOHOSTARCH=amd64

What did you do?

https://go.dev/play/p/sDjQRu9ElyH

What did you see happen?

http://%E3%81%82%E3%81%84%E3%81%86.com/

What did you expect to see?

http://あいう.com/
or
http://xn--l8jeg.com/

[sollniss]

Not sure if escaped by design, since there was no mention of it in #30922.
However, the docs say "String reassembles the [URL] into a valid URL string" and escaped hostnames/domains are not RFC conform.

[cagedmantis]

https://pkg.go.dev/net/url#URL.String States that "Any non-ASCII characters in host are escaped." This is working as intended.

I'm going to close this issue. Please feel free to reopen it if you believe this was closed in error.

[seankhliao]

percent encoded hostnames are rfc conformant to https://datatracker.ietf.org/doc/html/rfc3986#section-3.2.2