x/net/websocket: add a web socket client when targeting js/wasm

[definitelycarter]

Please answer these questions before submitting your issue. Thanks!

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

v 1.11

Does this issue reproduce with the latest release?

yes

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

GOARCH="amd64"
GOBIN="/Users/adamtcarter/go/bin"
GOCACHE="/Users/adamtcarter/Library/Caches/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="darwin"
GOOS="darwin"
GOPATH="/Users/adamtcarter/go"
GOPROXY=""
GORACE=""
GOROOT="/usr/local/go"
GOTMPDIR=""
GOTOOLDIR="/usr/local/go/pkg/tool/darwin_amd64"
GCCGO="gccgo"
CC="clang"
CXX="clang++"
CGO_ENABLED="1"
GOMOD=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fno-caret-diagnostics -Qunused-arguments -fmessage-length=0 -fdebug-prefix-map=/var/folders/7h/f4ryg4z10xd13dy_qf221grc0000gn/T/go-build718587663=/tmp/go-build -gno-record-gcc-switches -fno-common"

What did you do?

Use web sockets in go while targeting js,wasm

What did you expect to see?

NA

What did you see instead?

NA

If it makes sense, please add a WebSocket client in x/net/websocket when targeting js,wasm. I was digging around some of the code and it looks like it would be possible by taking a similar approach to what was taken with http.Request calling the native browser fetch api. Let me know if it's viable and I can take a stab at it.

[dennwc]

A working prototype: https://github.com/dennwc/dom/blob/master/net/ws/wsconn_js.go
Still need some work to support deadlines and addresses.

[agnivade]

@definitelycarter - https://godoc.org/nhooyr.io/websocket supports wasm now. Given that active development on x/net/websocket has nearly stopped, I would suggest you to use the package mentioned above.