Golang: Command line wrapper for posting to pastebin.com

gopastebin.go

package main

import (
    "flag"
    "fmt"
    "io/ioutil"
    "net/http"
    "net/url"
    "os"
    "strconv"
)

const apiUrl = "http://pastebin.com/api/api_post.php"

// Flags
var (
    k string // user key
    o string // option
    p int    // private
    n string // paste name
    x string // expire
    f string // format
)

func init() {
    flag.StringVar(&k, "k", "", "the api key")
    flag.StringVar(&o, "o", "paste", "api option (paste)")
    flag.IntVar(&p, "p", 1, "0 = public, 1 = unlisted, 2 = private")
    flag.StringVar(&n, "n", "", "paste name")
    flag.StringVar(&x, "x", "10M", "expiration")
    flag.StringVar(&f, "f", "text", "paste format")
    flag.Parse()
}

func main() {

    // Check for API key
    if k == "" {
        fmt.Fprintf(os.Stderr, "No API key! Please get one from pastebin.com and set the -k option\n")
        return
    }

    // Read code from stdin
    code, err := ioutil.ReadAll(os.Stdin)
    if err != nil {
        fmt.Fprintf(os.Stderr, "Could not read from STDIN: %v\n", err.Error())
            return
    }

    // Call PasteBin
    resp, err := http.PostForm(apiUrl, url.Values{
        "api_dev_key":           {k},
        "api_paste_private":     {strconv.Itoa(p)},
        "api_option":            {o},
        "api_paste_name":        {n},
        "api_paste_expire_date": {x},
        "api_paste_format":      {f},
        "api_paste_code":        {string(code)},
    })
    if err != nil {
        fmt.Fprintf(os.Stderr, "Error: %v\n", err.Error())
        return
    }

    // Print response
    body, err := ioutil.ReadAll(resp.Body)
    if err != nil {
        fmt.Fprintf(os.Stderr, "Error reading response: %v\n", err.Error())
        return
    }

    fmt.Println(string(body))
}