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auth.go
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auth.go
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package web
import (
"fmt"
"log"
"net/http"
"github.com/golang-jwt/jwt/v4"
"github.com/ostcar/timer/config"
)
type authPayload struct {
jwt.StandardClaims
Level string `json:"level"`
}
func createToken(level string, secred []byte) (string, error) {
token := jwt.NewWithClaims(jwt.SigningMethodHS256, authPayload{Level: level})
tokenString, err := token.SignedString(secred)
if err != nil {
return "", fmt.Errorf("signing token: %w", err)
}
return tokenString, nil
}
func checkClaim(tokenString string, secred []byte, levels []string) (bool, error) {
var claim authPayload
_, err := jwt.ParseWithClaims(tokenString, &claim, func(token *jwt.Token) (interface{}, error) {
return secred, nil
})
if err != nil {
return false, fmt.Errorf("parsing token: %w", err)
}
for _, level := range levels {
if claim.Level == level {
return true, nil
}
}
return false, nil
}
func canRead(r *http.Request, cfg config.Config) bool {
c, err := r.Cookie(cookieName)
if err != nil {
return false
}
v, _ := checkClaim(c.Value, []byte(cfg.Secred), []string{"read", "write"})
return v
}
func canWrite(r *http.Request, cfg config.Config) bool {
c, err := r.Cookie(cookieName)
if err != nil {
log.Println(err)
return false
}
v, err := checkClaim(c.Value, []byte(cfg.Secred), []string{"write"})
if err != nil {
log.Println(err)
}
return v
}