import (
  "github.com/dgrijalva/jwt-go"
)
// GenerateToken 生成Token
func GenerateToken(mapClaims jwt.MapClaims, key string) (string, error) {
  token := jwt.NewWithClaims(jwt.SigningMethodHS256, mapClaims)
  return token.SignedString([]byte(key))
}
// 验证token
func checkToken(uid int64,token *jwt.Token) bool {
  tokens, _ := token.SignedString([]byte(JWTKey))
  redisToken, _ := GetMemberToken(uid)
  if tokens != redisToken {
   return false
  }
  return true
}

token, err := request.ParseFromRequest(r, request.AuthorizationHeaderExtractor, func(token *jwt.Token) (interface{}, error) {
  return []byte(JWTKey), nil
})
if err == nil && token.Valid {
  tokenMap := token.Claims.(jwt.MapClaims)
  uidStr := tokenMap["uid"].(string)
  uid, _ := strconv.ParseInt(uidStr,10,64)

  if !checkToken(uid, token) {
   // 验证token 是否合法
   base.ErrorResponse(w, http.StatusUnauthorized, "Authorization Is Invalid")
   return
  }
}