Golang snippets

json.go

package main

import (
	"encoding/json"
	"fmt"
)

func main() {
	s := `{"text":"I'm a text.","number":1234,"floats":[1.1,2.2,3.3],"innermap":{"foo":1,"bar":2}}`

	var data map[string]interface{}
	err := json.Unmarshal([]byte(s), &data)
	if err != nil {
		panic(err)
	}

	fmt.Println("text =", data["text"])
	fmt.Println("number =", data["number"])
	floats := data["floats"].([]interface{})
	// floats := data["floats"].([]interface{})

	for _, entry := range floats {=
		fmt.Println(entry)
	}
	fmt.Println("floats =", data["floats"])
	fmt.Println("innermap =", data["innermap"])

	innermap, ok := data["innermap"].(map[string]interface{})
	if !ok {
		panic("inner map is not a map!")
	}
	fmt.Println("innermap.foo =", innermap["foo"])
	fmt.Println("innermap.bar =", innermap["bar"])

	fmt.Println("The whole map:", data)
}

mail_sender.go

package main

import (
  "net/smtp"
  "log"
  "fmt"
	"encoding/base64"
  "encoding/json"
)
/**
 *   []string -- {"[email protected]"}
  *  {string} message --
 */
func sendMail(auth smtp.Auth,  data map[string]interface{}){

    _recipients := data["to"].([]interface{})

    recipients := make([]string, len(_recipients))

    for index, entry := range _recipients {
      recipients[index] = entry.(string)
    }

    header := make(map[string]string)
  	header["From"] ="[email protected]"
  	header["Subject"] =  "gl"
  	header["MIME-Version"] = "1.0"
  	header["Content-Type"] = "text/plain; charset=\"utf-8\""
  	header["Content-Transfer-Encoding"] = "base64"

  	message := ""
  	for k, v := range header {
  		message += fmt.Sprintf("%s: %s\r\n", k, v)
  	}
    _message , err := json.Marshal(data["data"])
    if err != nil{
      fmt.Println(err)
      return
    }
    message += "\r\n" + base64.StdEncoding.EncodeToString([]byte(string(_message)))
    fmt.Println(">>>>>>>>>>>>>>>>>>")

    fmt.Println(recipients)
    fmt.Println(">>>>>>>>>>>>>>>>>>")

    // Connect to the server, authenticate, set the sender and recipient,
    // and send the email all in one step.
    err = smtp.SendMail(
        "smtp.gmail.com" + ":25",
        auth,
        "[email protected]",
        recipients,
        []byte(message),
    )

    if err != nil {
        log.Fatal(err)
    }
}

snip.go

package main


import (
	"fmt"
	"encoding/json"
)

type Event struct {
    Hy string `json:"hy"` 
}

func main() {
	message := `{"hy" : "ok"}`
	event := Event{}
	json.Unmarshal([]byte(message), &event)
	fmt.Println(event.Hy)
}