Golang HTTP GET request returning 404

I am trying to execute a simple HTTP get with BasicAuth. The problem is that the response keeps coming back "404", even though I can copy and paste the URL into a command-line cURL request and it works fine:

const url string = "http://1.2.3.4:6710/REST/command"
const username string = "..."
const password string = "..."

fmt.Printf("\n%v\n", url)

client := &http.Client{}

req, _ := http.NewRequest("GET", url, nil)
req.SetBasicAuth(username, password)
req.Proto = "HTTP/1.0"
req.ProtoMinor = 0

resp, _ := client.Do(req)

fmt.Printf("\n%v\n", resp)

defer resp.Body.Close()
body, _ := ioutil.ReadAll(resp.Body)   

fmt.Printf("\n%v\n\n", string(body))

So you can see that I am printing out my url immediately - this is the same line of text that if I copy into a command-line cURL request, all works perfectly.

My request response is

&{404 Not Found 404 HTTP/1.0 1 0 map[Pragma:[no-cache] Date:[Wed, 17 Apr 2013 15:01:33 GMT] Connection:[close] Server:[MoneyWorks_Datacentre/6.1.3 Win-x86 REST/6.1.3] Cache-Control:[no-store, no-cache, must-revalidate] Expires:[Wed, 17 Apr 2013 15:01:33 GMT]] 0xf8400e3920 -1 [] true map[] 0xf8400aa000}

Is there anything unique to golang's HTTP functions that differ from the way cURL would handle such a simple request?

EDIT: I have it working by passing the URL to exec.Command("curl", url).Output(). Obviously this is not the native solution I am hoping for but it works for now.

The issue was unicode-related. There was a %2F in my command (not displayed in my original question) that Go was converting to / that should have been left as %2F (cURL was properly leaving it as %2F). Changing the %2F to %252F fixed the issue.

It also appears that when creating a new HTTP request Go will parse your unicode back to plain text, so if you have %3D in the URL you submit to the HTTP request initializer it will convert it to =. I thought an obvious solution would be to put %253D into the URL but apparently there is a bug in Go that will convert %3D to = but NOT %25 to %. I had to use the Opaque URL request (request.Url.Opaque) to get around this.

You say the curl command just works but if you have the latest curl(mine is 7.22.0). The request would be something like this:

curl url --verbose
> GET / HTTP/1.1
>
> User-Agent: curl/7.22.0 (x86_64-pc-linux-gnu) libcurl/7.22.0 OpenSSL/1.0.1 zlib/1.2.3.4 libidn/1.23 librtmp/2.3
>
> Host: myhost.com
>
> Accept: /

But you are setting req.Proto = "HTTP/1.0". Doesn't seem right.