Why is this curl command not working?

Hi there I just want to create a simple golang applications, which posts a new dent at identi.ca using

curl -u username:password http://example.com/api/statuses/update.xml -d status='Howdy!' -d lat='30.468' -d long='-94.743'

This is my code so far and imho this should work, but actually it isn't working, does anybody know how to fix this?

EDIT: Nope: I don't get any error messages :/

package main

import(
        "fmt"
		"os"
		"bufio"
		"exec"
)
func main() {

var err os.Error
var username string

print("Username: ")
_, err = fmt.Scanln(&username)
if err != nil {
    fmt.Println("Error: ", err)
}

var password string
print("Password: ")
_, err = fmt.Scanln(&password)
if err != nil {
    fmt.Println("Error: ", err)
}

var status string
print("Status: ")
in := bufio.NewReader(os.Stdin);
status, err = in.ReadString('\n');
if err != nil {
    fmt.Println("Error: ", err)
}

exec.Command("curl -u " + username + ":" + password + "https://identi.ca/api/statuses/update.xml -d status='" + status +  "'" + "-d source='API'").Run()

exec.Command() doesn't take the whole command line as a single argument. You need to call it as:

exec.Command("curl", "-u", username+":"+password, ...url..., "-d", "status="+status, "-d", "source=API").Run()

How do you know if you get an error? You don't check the return value of Run().

You should actually separate the command creation from running it. This way you can set the process's stdout and stderr to something besides /dev/null, e.g.

c := exec.Command("curl", "-u", username+":"+password, "https://identi.ca/api/statuses/update.xml", "-d", "status="+status, "-d", "source=API")
c.Stdout = os.Stdout
c.Stderr = os.Stderr
err = c.Run()
if err != nil {
	fmt.Println("Error: ", err)
}

As explained here, exec.Command doesn't split the command line arguments like your normal shell environment does (bash, cmd, etc).

So in addition to filling in the parameters as

exec.Command("your_executable", "-switch1", "value1", "-switch2", "value2")

you can have bash or cmd (Windows) help you

exec.Command("cmd","/C", "your_executable -switch1 value1 -switch2 value2")

or you can split the argument string yourself (ref)

arguments := "-switch1 value1 -switch2 value2"

arg_slice := strings.Split(arguments, " ")

exec.Command("your_executable", arg_slice...)

This is most convenient, since you may build up the arguments string at run-time.