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access_internal.go
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/
access_internal.go
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package access
import (
"fmt"
"time"
"github.com/dgrijalva/jwt-go"
)
// createTokenClaims Claims
func (s *service) createTokenClaims(subject *Subject) (m *jwt.StandardClaims, err error) {
now := time.Now()
m = &jwt.StandardClaims{
ExpiresAt: now.Add(tokenExpiredDate).Unix(),
NotBefore: now.Unix(),
Id: subject.ID,
IssuedAt: now.Unix(),
Issuer: "book.micro.mu",
Subject: subject.ID,
}
return
}
// saveTokenToCache 保存token到缓存
func (s *service) saveTokenToCache(subject *Subject, val string) (err error) {
//保存
if err = ca.Set(tokenIDKeyPrefix+subject.ID, val, tokenExpiredDate).Err(); err != nil {
return fmt.Errorf("[saveTokenToCache] 保存token到缓存发生错误,err:" + err.Error())
}
return
}
// delTokenFromCache 清空token
func (s *service) delTokenFromCache(subject *Subject) (err error) {
//保存
if err = ca.Del(tokenIDKeyPrefix + subject.ID).Err(); err != nil {
return fmt.Errorf("[delTokenFromCache] 清空token 缓存发生错误,err:" + err.Error())
}
return
}
// getTokenFromCache 从缓存获取token
func (s *service) getTokenFromCache(subject *Subject) (token string, err error) {
// 获取
tokenCached, err := ca.Get(tokenIDKeyPrefix + subject.ID).Result()
if err != nil {
return token, fmt.Errorf("[getTokenFromCache] token不存在 %s", err)
}
return string(tokenCached), nil
}
// parseToken 解析token
func (s *service) parseToken(tk string) (c *jwt.StandardClaims, err error) {
token, err := jwt.Parse(tk, func(token *jwt.Token) (interface{}, error) {
_, ok := token.Method.(*jwt.SigningMethodHMAC)
if !ok {
return nil, fmt.Errorf("不合法的token格式: %v", token.Header["alg"])
}
return []byte(cfg.SecretKey), nil
})
// jwt 框架自带了一些检测,如过期,发布者错误等
if err != nil {
switch e := err.(type) {
case *jwt.ValidationError:
switch e.Errors {
case jwt.ValidationErrorExpired:
return nil, fmt.Errorf("[parseToken] 过期的token, err:%s", err)
default:
break
}
break
default:
break
}
return nil, fmt.Errorf("[parseToken] 不合法的token, err:%s", err)
}
// 检测合法
claims, ok := token.Claims.(jwt.MapClaims)
if !ok || !token.Valid {
return nil, fmt.Errorf("[parseToken] 不合法的token")
}
return mapClaimToJwClaim(claims), nil
}
// 把jwt的claim转成claims
func mapClaimToJwClaim(claims jwt.MapClaims) *jwt.StandardClaims {
jC := &jwt.StandardClaims{
Subject: claims["sub"].(string),
}
return jC
}