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token.go
36 lines (31 loc) · 908 Bytes
/
token.go
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package services
import (
"errors"
"fmt"
"strings"
"github.com/dgrijalva/jwt-go"
"github.com/jafarlihi/addressbook/config"
)
func ParseAuthorizationHeader(header string) (uint32, error) {
tokenFields := strings.Fields(header)
if len(tokenFields) != 2 {
return 0, errors.New("Token is missing")
}
tokenString := tokenFields[1]
token, err := jwt.Parse(tokenString, func(token *jwt.Token) (interface{}, error) {
if _, ok := token.Method.(*jwt.SigningMethodHMAC); !ok {
return nil, fmt.Errorf("Unexpected signing method: %v", token.Header["alg"])
}
return []byte(config.Config.Jwt.SigningSecret), nil
})
if err != nil {
return 0, errors.New("Failed to parse the token")
}
var userID float64
if claims, ok := token.Claims.(jwt.MapClaims); ok && token.Valid {
userID = claims["userID"].(float64)
} else {
return 0, errors.New("Invalid token")
}
return uint32(userID), nil
}