The beginnings of a golang Cookie setter and session manager. And then I realised Gorilla Toolkit had a sessions library.

cookie.go

package cookie

import (
	"crypto/hmac"
	"crypto/sha1"
	"encoding/hex"
	"io"
	"net/http"
)

var Cookies map[string]*Cookie

// Ensure our cookies map isn't a nil map when we make or use cookies by making a new map
func init() {
	Cookies = make(map[string]*Cookie, 0)
}

func New(name, signature string) *Cookie {
	if cookie, ok := Cookies[name]; ok {
		return cookie
	}
	cookie := &Cookie{
		Name:      name,
		signature: signature,
	}
	Cookies[name] = cookie
	return cookie
}

// Read all cookies from the HTTP request and fill the Cookies map with available cookies
func Read(r *http.Request) {

}

// Write all cookies from the Cookies map to the HTTP response
func Write(w http.ResponseWriter) {
}

// A cookie container. Can store many key/value records in a single cookie called Name
type Cookie struct {
	Name      string
	Values    map[string]string
	signature string
}

// Get a key from a cookie
func (c *Cookie) Set(name string, value string) {
	c.Values[name] = value
}

// Set a key from a cookie
func (c *Cookie) Get(name string) string {
	return c.Values[name]
}