net/url: Parsing of URL with a query string containing multiple question marks `?` is invalid

[korya]

Please answer these questions before submitting your issue. Thanks!

What version of Go are you using (go version)?

https://play.golang.org

and

$ go version
go version go1.7.3 darwin/amd64

What operating system and processor architecture are you using (go env)?

$ go env
GOARCH="amd64"
GOBIN=""
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/korya/dev/plntr/docker-images/wi-deploy"
GORACE=""
GOROOT="/usr/local/Cellar/go/1.7.3/libexec"
GOTOOLDIR="/usr/local/Cellar/go/1.7.3/libexec/pkg/tool/darwin_amd64"
CC="clang"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/33/9nzx3m3n0fj7_tg1r3rdnkwc0000gn/T/go-build652538626=/tmp/go-build -gno-record-gcc-switches -fno-common"
CXX="clang++"
CGO_ENABLED="1"

What did you do?

If possible, provide a recipe for reproducing the error.
A complete runnable program is good.
A link on play.golang.org is best.

I am trying to parse a URL with a query string containing multiple question marks (?): ?a=1?b=2?c=3.

See the full example here: https://play.golang.org/p/LNpa_F9kuh

What did you expect to see?

I would expect the query string ?a=1?b=2?c=3 to be parsed the same way that ?a=1&b=2&c=3 is parsed; that is I expect to get a mapping with 3 entries: a mapped to 1, b mapped to 2 and c mapped to 3.

What did you see instead?

what I get is a map with a single entry: a mapped to 1?b=2?c=3.

[bradfitz]

Why do you expect that?

That is not a standard URL format. What is generating those URLs? Do other popular URL parsing libraries accept this format?

[korya]

I think you are right. I don't know why I was under impression that any additional question marks (?) inside query string should be treated as ampersands (&).

After reading https://tools.ietf.org/html/rfc3986#section-3.4, I see there is nothing that suggests it. Also other parsers behave same way that go net/url does.

My bad. I am sorry. I am closing the issue.