jsonfmt

gistfile1.txt

package main

import (
	"encoding/json"
	"io/ioutil"
	"log"
	"os"
)

// reads array or hash, writes pretty JSON

func main() {
	data, err := ioutil.ReadAll(os.Stdin)
	if err != nil {
		log.Fatal(err.Error())
	}
	// try array
	var array []map[string]interface{}
	err = json.Unmarshal(data, &array)
	if err != nil {
		// try hash
		var hash map[string]interface{}
		err = json.Unmarshal(data, &hash)
		if err != nil {
			log.Fatalf("not a valid array|hash :%v", err)
		}
		// dump hash
		out, err := json.MarshalIndent(hash, "", "\t")
		if err != nil {
			log.Fatal("error:", err)
		}
		os.Stdout.Write(out)
	} else {
		// dump array
		out, err := json.MarshalIndent(array, "", "\t")
		if err != nil {
			log.Fatal("error:", err)
		}
		os.Stdout.Write(out)
	}
}