net/http: http client not support `socks://` proxy

[zzxn]

Go version

go version go1.22.0 linux/amd64

Output of go env in your module/workspace:

GO111MODULE=''
GOARCH='amd64'
GOBIN=''
GOCACHE='/home/zzxn/.cache/go-build'
GOENV='/home/zzxn/.config/go/env'
GOEXE=''
GOEXPERIMENT=''
GOFLAGS=''
GOHOSTARCH='amd64'
GOHOSTOS='linux'
GOINSECURE=''
GOMODCACHE='/home/zzxn/go/pkg/mod'
GONOPROXY='git.shihe.tech'
GONOSUMDB='git.shihe.tech'
GOOS='linux'
GOPATH='/home/zzxn/go'
GOPRIVATE='git.shihe.tech'
GOPROXY='https://goproxy.cn,direct'
GOROOT='/usr/local/go'
GOSUMDB='sum.golang.org'
GOTMPDIR=''
GOTOOLCHAIN='auto'
GOTOOLDIR='/usr/local/go/pkg/tool/linux_amd64'
GOVCS=''
GOVERSION='go1.22.0'
GCCGO='gccgo'
GOAMD64='v1'
AR='ar'
CC='gcc'
CXX='g++'
CGO_ENABLED='1'
GOMOD='/home/zzxn/code/crypto/go-solana-play/go.mod'
GOWORK=''
CGO_CFLAGS='-O2 -g'
CGO_CPPFLAGS=''
CGO_CXXFLAGS='-O2 -g'
CGO_FFLAGS='-O2 -g'
CGO_LDFLAGS='-O2 -g'
PKG_CONFIG='pkg-config'
GOGCCFLAGS='-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -ffile-prefix-map=/tmp/go-build3618547432=/tmp/go-build -gno-record-gcc-switches'

What did you do?

Set http_proxy which starts with socks://:

export ALL_PROXY="socks://$host_ip:10810"
export HTTP_PROXY=$ALL_PROXY
export HTTPS_PROXY=$ALL_PROXY

Then I use the default http client to request a random domain:

package main

import (
	"fmt"
	"net/http"
)

func main() {
    _, err := http.Get("https://www.google.com")
    if err != nil {
        fmt.Println(err)
    }
}

What did you see happen?

I got a error like:

 proxyconnect tcp: dial tcp: lookup socks on 172.23.32.1:53: no such host

It seems like it treats socks as a domain instead of a protocol.

However, if I set http_proxy using http://, everything is OK.

What did you expect to see?

No error.

[seankhliao]

https://pkg.go.dev/net/http#ProxyFromEnvironment

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