I get a more descriptive error from this code. https://play.golang.org/p/_f2geOmnMzl

	res, err := http.Get("github.com")
	if err != nil {
		panic(err)
	}
	fmt.Println(res)

panic: Get github.com: unsupported protocol scheme ""

goroutine 1 [running]:
main.main()
	/tmp/sandbox333729466/main.go:11 +0xe0

Also, the Go project does not use its bug tracker for general discussion or asking questions. The Github bug tracker is only used for tracking bugs and proposals going through the Proposal Process.

Please see the Questions wiki page; it has a list of good places for asking questions. Thanks!

Closing per:

Please see the Questions wiki page; it has a list of good places for asking questions. Thanks!

I was thinking how to categorize this. This wasn't technically a question per-se. OP raised an issue which wasn't working in his system. While it was clear that this cannot be a bug in Go because of the simplicity of the issue, I think it warranted a bit more than simply closing it.

Apologies @agnivade (and @yyq2013) will re-open pending your update.

But same code works fine on linux OS.

@yyq2013 I'm not seeing this work on Go 1.10.1 in a docker image. With or without modifying http.DefaultClient.Transport. I don't have windows handy right now.

root@0e7d30ea69a8:/go# go run test.go 
2018/04/20 15:05:04 Get github.com: unsupported protocol scheme ""
exit status 1

root@0e7d30ea69a8:/go# go version
go version go1.10.1 linux/amd64

@adamdecaf
why do you remove the scheme?
res, err:= http.Get("**https://**www.github.com/")

my linux:
[root@iZ2zef032vfaf0fdq8tcbuZ src]# go env
GOARCH="amd64"
GOBIN=""
GOCACHE="/root/.cache/go-build"
GOEXE=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/root/data/code/"
GORACE=""
GOROOT="/root/data/go"
GOTMPDIR=""
GOTOOLDIR="/root/data/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
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 -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build220856888=/tmp/go-build"

[root@iZ2zef032vfaf0fdq8tcbuZ src]# cat test.go
package main

import (
"net/http"
"io/ioutil"
"fmt"
"log"
)

func main() {
/* tr := &http.Transport{}
http.DefaultClient.Transport =tr*/
res, err:= http.Get("https://www.github.com/")
if err != nil {
log.Fatal(err)
return
}

    defer res.Body.Close()

    body,err:=ioutil.ReadAll(res.Body)
    if err != nil {
            log.Fatal(err)
            return
    }

    fmt.Println(string(body))

}
[root@iZ2zef032vfaf0fdq8tcbuZ src]# go run test.go
html content text printed here

@yyq2013 Your example had it removed when you posted originally.

@adamdecaf maybe, I was updating it then

@yyq2013 - It seems like a system specific issue to me. Do you have access to another windows system ? Can you do a curl -O https://github.com and check ?

@agnivade
C:\WINDOWS\system32>curl -O https://www.github.com
curl: Remote file name has no length!
curl: try 'curl --help' or 'curl --manual' for more information

It's strange, on another win10 it works.

Sorry, there has to be an path for -O. Try curl -o file https://github.com

I just tested your sample (with DefaultClient commented out as well as not commented), and got back the entire web page correctly both times.
I am running Microsoft Windows 10 Pro build 16299 (64-bit OS, x64-based processor)
go version go1.10.1 windows/amd64

I think maybe the original code was just missing the scheme as @adamdecaf mentioned.

I found the reason, there is a global socks5 proxy on my win10 OS, the default transport use it by default.

Sorry for wasting your time, everyone here.
I will be more careful before post a bug.
Thanks for your patient guide, everyone.

Please close it.