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|
package http
import (
"errors"
"net/http"
"github.com/gorilla/securecookie"
)
type CookieHandler struct {
securecookie *securecookie.SecureCookie
secureCookieFunc func(r *http.Request) (*securecookie.SecureCookie, error)
secureOnly bool
sameSite http.SameSite
maxAge int
domain string
path string
}
func NewCookieHandler(hashKey, encryptKey []byte, opts ...CookieHandlerOpt) *CookieHandler {
c := &CookieHandler{
securecookie: securecookie.New(hashKey, encryptKey),
secureOnly: true,
sameSite: http.SameSiteLaxMode,
path: "/",
}
for _, opt := range opts {
opt(c)
}
return c
}
func NewRequestAwareCookieHandler(secureCookieFunc func(r *http.Request) (*securecookie.SecureCookie, error), opts ...CookieHandlerOpt) *CookieHandler {
c := &CookieHandler{
secureCookieFunc: secureCookieFunc,
secureOnly: true,
sameSite: http.SameSiteLaxMode,
path: "/",
}
for _, opt := range opts {
opt(c)
}
return c
}
type CookieHandlerOpt func(*CookieHandler)
func WithUnsecure() CookieHandlerOpt {
return func(c *CookieHandler) {
c.secureOnly = false
}
}
func WithSameSite(sameSite http.SameSite) CookieHandlerOpt {
return func(c *CookieHandler) {
c.sameSite = sameSite
}
}
func WithMaxAge(maxAge int) CookieHandlerOpt {
return func(c *CookieHandler) {
c.maxAge = maxAge
if c.IsRequestAware() {
return
}
c.securecookie.MaxAge(maxAge)
}
}
func WithDomain(domain string) CookieHandlerOpt {
return func(c *CookieHandler) {
c.domain = domain
}
}
func WithPath(path string) CookieHandlerOpt {
return func(c *CookieHandler) {
c.path = path
}
}
func (c *CookieHandler) CheckCookie(r *http.Request, name string) (string, error) {
cookie, err := r.Cookie(name)
if err != nil {
return "", err
}
secureCookie := c.securecookie
if c.IsRequestAware() {
secureCookie, err = c.secureCookieFunc(r)
if err != nil {
return "", err
}
}
var value string
if err := secureCookie.Decode(name, cookie.Value, &value); err != nil {
return "", err
}
return value, nil
}
func (c *CookieHandler) CheckQueryCookie(r *http.Request, name string) (string, error) {
value, err := c.CheckCookie(r, name)
if err != nil {
return "", err
}
if value != r.FormValue(name) {
return "", errors.New(name + " does not compare")
}
return value, nil
}
func (c *CookieHandler) SetCookie(w http.ResponseWriter, name, value string) error {
if c.IsRequestAware() {
return errors.New("Cookie handler is request aware")
}
encoded, err := c.securecookie.Encode(name, value)
if err != nil {
return err
}
http.SetCookie(w, &http.Cookie{
Name: name,
Value: encoded,
Domain: c.domain,
Path: c.path,
MaxAge: c.maxAge,
HttpOnly: true,
Secure: c.secureOnly,
SameSite: c.sameSite,
})
return nil
}
func (c *CookieHandler) SetRequestAwareCookie(r *http.Request, w http.ResponseWriter, name string, value string) error {
if !c.IsRequestAware() {
return errors.New("Cookie handler is not request aware")
}
secureCookie, err := c.secureCookieFunc(r)
if err != nil {
return err
}
encoded, err := secureCookie.Encode(name, value)
if err != nil {
return err
}
http.SetCookie(w, &http.Cookie{
Name: name,
Value: encoded,
Domain: c.domain,
Path: c.path,
MaxAge: c.maxAge,
HttpOnly: true,
Secure: c.secureOnly,
SameSite: c.sameSite,
})
return nil
}
func (c *CookieHandler) DeleteCookie(w http.ResponseWriter, name string) {
http.SetCookie(w, &http.Cookie{
Name: name,
Value: "",
Domain: c.domain,
Path: c.path,
MaxAge: -1,
HttpOnly: true,
Secure: c.secureOnly,
SameSite: c.sameSite,
})
}
func (c *CookieHandler) IsRequestAware() bool {
return c.secureCookieFunc != nil
}
|
