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paseto.go
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paseto.go
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package pasetoware
import (
"strings"
"github.com/gofiber/fiber/v3"
)
// New PASETO middleware, returns a handler that takes a token in selected lookup param and in case token is valid
// it saves the decrypted token on ctx.Locals, take a look on Config to know more configuration options
func New(authConfigs ...Config) fiber.Handler {
// Set default authConfig
config := configDefault(authConfigs...)
// Return middleware handler
return func(c fiber.Ctx) error {
token, err := getToken(c)
if err != nil {
return config.ErrorHandler(c, err)
}
parsedToken, err := config.Tokener.ParseToken(token)
if err != nil {
return config.ErrorHandler(c, err)
}
for _, key := range config.PayloadKeys {
val, err := parsedToken.GetString(key)
if err != nil {
return config.ErrorHandler(c, err)
}
// Store user information from token into context.
c.Locals(key, val)
}
return config.SuccessHandler(c)
}
}
func getToken(c fiber.Ctx) (string, error) {
authHeader := strings.SplitN(c.Get(fiber.HeaderAuthorization), " ", 2)
if len(authHeader) != 2 {
return "", ErrInvalidToken
}
if authHeader[0] != TokenPrefix {
return "", ErrInvalidToken
}
if authHeader[1] == "" {
return "", ErrMissingToken
}
return authHeader[1], nil
}