Little program written in Go to upload stuff to hastebin.com

haste.go

package main

import (
	"bytes"
	"encoding/json"
	"errors"
	"flag"
	"fmt"
	"io/ioutil"
	"net/http"
	"os"
)

const VERSION string = "0.0.1"
const HASTEBIN_URL string = "http://hastebin.com/"

type Response struct {
	Key string `json:"key"`
}

var useRaw = flag.Bool("raw", false, "Return an url which points to the raw-text of the upload.")

func init() {
	flag.Usage = func() {
		fmt.Println("=============[Haze]=============")
		fmt.Println("Usage:")
		fmt.Println("    haze [-r]")
		fmt.Println("    -r: Returns an url which points to the raw-text of the upload.")
		fmt.Println("Example: ")
		fmt.Println("    ./haze <file>")
		fmt.Println("        (Keep in mind that the file-param should *always* be first)")
		fmt.Println("You can also use pipes, eg:")
		fmt.Println("    echo 'test' | ./haze -r")
		fmt.Println("--------------------------------")
		os.Exit(-1)
	}

	flag.BoolVar(useRaw, "r", false, "Returns an url which points to the raw-text of the upload.")

	flag.Parse()
}

func main() {
	var data []byte
	var err error

	stat, _ := os.Stdin.Stat()
	if (stat.Mode() & os.ModeCharDevice) == 0 {
		data, err = ioutil.ReadAll(os.Stdin)
	} else {
		fileName := os.Args[1]
		data, err = ioutil.ReadFile(fileName)
	}

	if err != nil {
		panic(err)
	}

	response, err := uploadRaw(string(data))
	if err != nil {
		panic(err)
	}

	printResult(response)

	os.Exit(0)
}

func uploadRaw(data string) (response Response, err error) {
	response = Response{}

	buffer := bytes.NewBuffer([]byte(data))
	req, err := http.NewRequest("POST", HASTEBIN_URL+"documents", buffer)
	req.Header.Set("User-Agent", "Mozilla/5.0")
	req.Header.Set("Content-Type", "text")

	client := &http.Client{}
	resp, err := client.Do(req)

	if err != nil {
		panic(err)
	}

	defer resp.Body.Close()

	if resp.StatusCode == 200 {
		bytes, ioerr := ioutil.ReadAll(resp.Body)
		if ioerr != nil {
			err = ioerr
			return
		}

		err = json.Unmarshal(bytes, &response)
		return
	} else {
		err = errors.New("Response-code was not 200!")
		return
	}
}

func printResult(response Response) {
	var result string
	if *useRaw {
		result = fmt.Sprintf("%s%s%s", HASTEBIN_URL, "raw/", response.Key)
	} else {
		result = fmt.Sprintf("%s%s", HASTEBIN_URL, response.Key)
	}

	fmt.Println("result: ", result)
}

How do you run it?