diff --git a/cmd/service.go b/cmd/service.go
index aedbd13..45d08ec 100644
--- a/cmd/service.go
+++ b/cmd/service.go
@@ -19,6 +19,8 @@ func parseArgs(cmd string) {
 	switch cmd {
 	case "-v", "--v", "-version", "--version":
 		versionCmd()
+	case "--json":
+		versionCmdJson()
 	}
 
 	os.Exit(0)
@@ -28,3 +30,7 @@ func versionCmd() {
 	fmt.Printf("[Blocks Service: %s] Version: %s \n", vars.ServiceKey, vars.VERSION)
 	fmt.Printf("[Blocks Service: %s] Compile: %s by %s build.\n", vars.ServiceKey, vars.GO_VERSION, vars.BUILD_TIME)
 }
+
+func versionCmdJson() {
+	fmt.Printf("{\"version\":\"%s\",\"build_time\":\"%s\"}\n", vars.VERSION, vars.BUILD_TIME)
+}
diff --git a/encipher/aes.go b/encipher/aes.go
index e8ff8f5..de87055 100644
--- a/encipher/aes.go
+++ b/encipher/aes.go
@@ -28,6 +28,9 @@ func New() {
 }
 
 func GenerateTokenAes(id uint, identity, client, role string, extend map[string]string) (string, error) {
+	if (JwtSecretLen == 16 || JwtSecretLen == 24 || JwtSecretLen == 32) == false {
+		return "", errors.New("JwtSecret lenght must 16/24/32.")
+	}
 	expireTime := time.Now().Add(vars.JwtExpireDay)
 	claims := types.JwtClaims{
 		ID:        id,
@@ -51,9 +54,7 @@ func GenerateTokenAes(id uint, identity, client, role string, extend map[string]
 }
 
 func AesEncryptCBC(plan []byte) (string, error) {
-	if (JwtSecretLen == 16 || JwtSecretLen == 24 || JwtSecretLen == 32) == false {
-		return "", errors.New("JwtSecret lenght must 16/24/32.")
-	}
+
 	// 分组秘钥
 	// NewCipher该函数限制了输入k的长度必须为16, 24或者32
 	block, _ := aes.NewCipher(JwtSecret)
@@ -121,6 +122,10 @@ func PKCS7UnPadding(origData []byte, blocksize int) []byte {
 
 	length := len(origData)
 	unpadding := int(origData[length-1])
+
+	if length-unpadding <= 0 {
+		return nil
+	}
 	return origData[:(length - unpadding)]
 }
 
diff --git a/exception/auth.go b/exception/auth.go
index c81a0bc..2e0cfe9 100644
--- a/exception/auth.go
+++ b/exception/auth.go
@@ -2,13 +2,13 @@ package exception
 
 // jwt custom error code ,begin:200
 var (
-	ErrAuthPasswd       = ErrorJson(201, "Password Error")
-	ErrAuthNotFound     = ErrorJson(202, "Auth Token Not Found")
-	ErrAuthParseFail    = ErrorJson(203, "Auth Parse Fail")
-	ErrAuthId           = ErrorJson(204, "Auth Id Not Passed")
-	ErrAuthIdentity     = ErrorJson(205, "Auth Identity Not Passed")
-	ErrAuthTokenChanged = ErrorJson(206, "Auth Token Changed")
-	ErrAuthIdType       = ErrorJson(207, "Auth Id Type Error")
-	ErrAuthExpire       = ErrorJson(208, "Auth Token Expire")
-	ErrAuthClient       = ErrorJson(208, "Auth Token Client Not Passed")
+	ErrAuthPasswd       = Errorf(201, "Password Error")
+	ErrAuthNotFound     = Errorf(202, "Auth Token Not Found")
+	ErrAuthParseFail    = Errorf(203, "Auth Parse Fail")
+	ErrAuthId           = Errorf(204, "Auth Id Not Passed")
+	ErrAuthIdentity     = Errorf(205, "Auth Identity Not Passed")
+	ErrAuthTokenChanged = Errorf(206, "Auth Token Changed")
+	ErrAuthIdType       = Errorf(207, "Auth Id Type Error")
+	ErrAuthExpire       = Errorf(208, "Auth Token Expire")
+	ErrAuthClient       = Errorf(208, "Auth Token Client Not Passed")
 )
diff --git a/exception/db.go b/exception/db.go
index b949eb9..f8dcaf1 100644
--- a/exception/db.go
+++ b/exception/db.go
@@ -2,9 +2,9 @@ package exception
 
 // db custom error code ,begin:300
 var (
-	ErrDBFatal       = ErrorJson(300, "DB Fatal error")
-	ErrCacheFatal    = ErrorJson(301, "Cache Fatal error")
-	ErrEtcdFatal     = ErrorJson(302, "Etcd Fatal error")
-	ErrElasticFatal  = ErrorJson(303, "Elastic Fatal error")
-	ErrBlocksMQFatal = ErrorJson(304, "BlocksMQ Fatal error")
+	ErrDBFatal       = Errorf(300, "DB Fatal error")
+	ErrCacheFatal    = Errorf(301, "Cache Fatal error")
+	ErrEtcdFatal     = Errorf(302, "Etcd Fatal error")
+	ErrElasticFatal  = Errorf(303, "Elastic Fatal error")
+	ErrBlocksMQFatal = Errorf(304, "BlocksMQ Fatal error")
 )
diff --git a/exception/errors.go b/exception/errors.go
index a73de9a..98ff4b0 100644
--- a/exception/errors.go
+++ b/exception/errors.go
@@ -9,27 +9,27 @@ import (
 
 var (
 	// google grpc error status.
-	OK                    = ErrorJson(0, "OK")
-	ErrCanceled           = ErrorJson(1, "Canceled")
-	ErrUnknown            = ErrorJson(2, "Unknown")
-	ErrInvalidArgument    = ErrorJson(3, "Invalid Argument")
-	ErrDeadlineExceeded   = ErrorJson(4, "Deadline Exceeded")
-	ErrNotFound           = ErrorJson(5, "Not Found")
-	ErrAlreadyExists      = ErrorJson(6, "Already Exists")
-	ErrPermissionDenied   = ErrorJson(7, "Permission Denied")
-	ErrResourceExhausted  = ErrorJson(8, "Resource Exhausted")
-	ErrFailedPrecondition = ErrorJson(9, "Failed Precondition")
-	ErrAborted            = ErrorJson(10, "Aborted")
-	ErrOutOfRange         = ErrorJson(11, "Out Of Range")
-	ErrUnimplemented      = ErrorJson(12, "Unimplemented")
-	ErrInternal           = ErrorJson(13, "Internal")
-	ErrUnavailable        = ErrorJson(14, "Unavailable")
-	ErrDataLoss           = ErrorJson(15, "Data Loss")
-	ErrUnauthenticated    = ErrorJson(16, "Unauthenticated")
-	ErrJSONMarshal        = ErrorJson(17, "Marshal JSON")
-	ErrJSONUnmarshal      = ErrorJson(18, "Unmarshal JSON")
+	OK                    = Errorf(0, "OK")
+	ErrCanceled           = Errorf(1, "Canceled")
+	ErrUnknown            = Errorf(2, "Unknown")
+	ErrInvalidArgument    = Errorf(3, "Invalid Argument")
+	ErrDeadlineExceeded   = Errorf(4, "Deadline Exceeded")
+	ErrNotFound           = Errorf(5, "Not Found")
+	ErrAlreadyExists      = Errorf(6, "Already Exists")
+	ErrPermissionDenied   = Errorf(7, "Permission Denied")
+	ErrResourceExhausted  = Errorf(8, "Resource Exhausted")
+	ErrFailedPrecondition = Errorf(9, "Failed Precondition")
+	ErrAborted            = Errorf(10, "Aborted")
+	ErrOutOfRange         = Errorf(11, "Out Of Range")
+	ErrUnimplemented      = Errorf(12, "Unimplemented")
+	ErrInternal           = Errorf(13, "Internal")
+	ErrUnavailable        = Errorf(14, "Unavailable")
+	ErrDataLoss           = Errorf(15, "Data Loss")
+	ErrUnauthenticated    = Errorf(16, "Unauthenticated")
+	ErrJSONMarshal        = Errorf(17, "Marshal JSON")
+	ErrJSONUnmarshal      = Errorf(18, "Unmarshal JSON")
 
-	ErrSmsCode = ErrorJson(20, "SMS Code Invalid")
+	ErrSmsCode = Errorf(20, "SMS Code Invalid")
 
 	// coustom error status
 )
@@ -41,7 +41,3 @@ func Error(c uint32, msg string) error {
 func Errorf(c uint32, format string, a ...interface{}) error {
 	return status.New(codes.Code(c), fmt.Sprintf(format, a...)).Err()
 }
-
-func ErrorJson(c uint32, msg string) error {
-	return status.New(codes.Code(c), fmt.Sprintf(`{ "Code": %d, "Msg": "%s" }`, c, msg)).Err()
-}
diff --git a/exception/mq.go b/exception/mq.go
index 76b87b3..981b2d6 100644
--- a/exception/mq.go
+++ b/exception/mq.go
@@ -2,10 +2,10 @@ package exception
 
 // mq custom error code ,begin:900
 var (
-	ErrMQClient   = ErrorJson(900, "MQ Connect Error")
-	ErrMQDispatch = ErrorJson(901, "MQ Dispatch Error")
-	ErrMQProducer = ErrorJson(902, "MQ Producer Error")
-	ErrMQConsumer = ErrorJson(902, "MQ Consumer Error")
-	ErrMQInternal = ErrorJson(903, "MQ Internal Error")
-	ErrMQStorage  = ErrorJson(904, "MQ Storage Error")
+	ErrMQClient   = Errorf(900, "MQ Connect Error")
+	ErrMQDispatch = Errorf(901, "MQ Dispatch Error")
+	ErrMQProducer = Errorf(902, "MQ Producer Error")
+	ErrMQConsumer = Errorf(902, "MQ Consumer Error")
+	ErrMQInternal = Errorf(903, "MQ Internal Error")
+	ErrMQStorage  = Errorf(904, "MQ Storage Error")
 )
diff --git a/exception/work.go b/exception/work.go
deleted file mode 100644
index a784e55..0000000
--- a/exception/work.go
+++ /dev/null
@@ -1,30 +0,0 @@
-package exception
-
-// mesh custom error code ,begin:100
-var (
-	// proxy
-	ErrWorkerServiceNotFound = ErrorJson(100, "Service Node Not Started")
-	ErrWorkerServerIsNil     = ErrorJson(101, "Service Is Nil")
-	ErrWorkerMethodNotFound  = ErrorJson(102, "Service Method Not Found")
-	ErrWorkerRequestContent  = ErrorJson(103, "Worker Parse Request Content")
-	ErrWorkerRequestParams   = ErrorJson(104, "Worker Parse Request Params")
-
-	// header
-	ErrInvalidHeaderParams = ErrorJson(105, "Invalid Header Params")
-
-	// grpc getway
-	ErrWorkerFailedProxy          = ErrorJson(107, "Worker gRPC proxying should never reach this stage")
-	ErrWorkerGrpcProxyShould      = ErrorJson(108, "Worker gRPC proxying should never reach this stage")
-	ErrWorkerServerStreamNotFound = ErrorJson(109, "Worker lowLevelServerStream not exists in context")
-
-	// http getway
-	ErrWorkerHttpReadAll                 = ErrorJson(110, "Worker Http Read All")
-	ErrWorkerHttpResolveService          = ErrorJson(111, "Worker Http Resolve Service")
-	ErrWorkerHttpMarshalJSON             = ErrorJson(112, "Worker Http Parameter Must JSON")
-	ErrWorkerHttpUnmarshalJSON           = ErrorJson(113, "Worker Http Return Not JSON")
-	ErrWorkerHttpReflectInvokeRpc        = ErrorJson(114, "Worker Http Reflect InvokeRpc")
-	ErrWorkerHttpReflectAsDynamicMessage = ErrorJson(115, "Worker Http Reflect AsDynamicMessage")
-
-	// invok
-	ErrServiceInvok = ErrorJson(116, "Service Invok")
-)