diff --git a/services/bos/client.go b/services/bos/client.go
index aec79b24..c3e56545 100644
--- a/services/bos/client.go
+++ b/services/bos/client.go
@@ -147,8 +147,8 @@ func NewClientWithConfig(config *BosClientConfiguration) (*Client, error) {
 // ListBuckets - list all buckets
 //
 // RETURNS:
-//     - *api.ListBucketsResult: the all buckets
-//     - error: the return error if any occurs
+//   - *api.ListBucketsResult: the all buckets
+//   - error: the return error if any occurs
 func (c *Client) ListBuckets() (*api.ListBucketsResult, error) {
 	return api.ListBuckets(c, c.BosContext)
 }
@@ -156,11 +156,12 @@ func (c *Client) ListBuckets() (*api.ListBucketsResult, error) {
 // ListObjects - list all objects of the given bucket
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - args: the optional arguments to list objects
+//   - bucket: the bucket name
+//   - args: the optional arguments to list objects
+//
 // RETURNS:
-//     - *api.ListObjectsResult: the all objects of the bucket
-//     - error: the return error if any occurs
+//   - *api.ListObjectsResult: the all objects of the bucket
+//   - error: the return error if any occurs
 func (c *Client) ListObjects(bucket string,
 	args *api.ListObjectsArgs) (*api.ListObjectsResult, error) {
 	return api.ListObjects(c, bucket, args, c.BosContext)
@@ -169,14 +170,15 @@ func (c *Client) ListObjects(bucket string,
 // SimpleListObjects - list all objects of the given bucket with simple arguments
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - prefix: the prefix for listing
-//     - maxKeys: the max number of result objects
-//     - marker: the marker to mark the beginning for the listing
-//     - delimiter: the delimiter for list objects
+//   - bucket: the bucket name
+//   - prefix: the prefix for listing
+//   - maxKeys: the max number of result objects
+//   - marker: the marker to mark the beginning for the listing
+//   - delimiter: the delimiter for list objects
+//
 // RETURNS:
-//     - *api.ListObjectsResult: the all objects of the bucket
-//     - error: the return error if any occurs
+//   - *api.ListObjectsResult: the all objects of the bucket
+//   - error: the return error if any occurs
 func (c *Client) SimpleListObjects(bucket, prefix string, maxKeys int, marker,
 	delimiter string) (*api.ListObjectsResult, error) {
 	args := &api.ListObjectsArgs{delimiter, marker, maxKeys, prefix}
@@ -186,9 +188,10 @@ func (c *Client) SimpleListObjects(bucket, prefix string, maxKeys int, marker,
 // HeadBucket - test the given bucket existed and access authority
 //
 // PARAMS:
-//     - bucket: the bucket name
+//   - bucket: the bucket name
+//
 // RETURNS:
-//     - error: nil if exists and have authority otherwise the specific error
+//   - error: nil if exists and have authority otherwise the specific error
 func (c *Client) HeadBucket(bucket string) error {
 	err, _ := api.HeadBucket(c, bucket, c.BosContext)
 	return err
@@ -197,10 +200,11 @@ func (c *Client) HeadBucket(bucket string) error {
 // DoesBucketExist - test the given bucket existed or not
 //
 // PARAMS:
-//     - bucket: the bucket name
+//   - bucket: the bucket name
+//
 // RETURNS:
-//     - bool: true if exists and false if not exists or occurs error
-//     - error: nil if exists or not exist, otherwise the specific error
+//   - bool: true if exists and false if not exists or occurs error
+//   - error: nil if exists or not exist, otherwise the specific error
 func (c *Client) DoesBucketExist(bucket string) (bool, error) {
 	err, _ := api.HeadBucket(c, bucket, c.BosContext)
 	if err == nil {
@@ -217,7 +221,7 @@ func (c *Client) DoesBucketExist(bucket string) (bool, error) {
 	return false, err
 }
 
-//IsNsBucket - test the given bucket is namespace bucket or not
+// IsNsBucket - test the given bucket is namespace bucket or not
 func (c *Client) IsNsBucket(bucket string) bool {
 	err, resp := api.HeadBucket(c, bucket, c.BosContext)
 	if err == nil && resp.Header(sdk_http.BCE_BUCKET_TYPE) == api.NAMESPACE_BUCKET {
@@ -235,10 +239,11 @@ func (c *Client) IsNsBucket(bucket string) bool {
 // PutBucket - create a new bucket
 //
 // PARAMS:
-//     - bucket: the new bucket name
+//   - bucket: the new bucket name
+//
 // RETURNS:
-//     - string: the location of the new bucket if create success
-//     - error: nil if create success otherwise the specific error
+//   - string: the location of the new bucket if create success
+//   - error: nil if create success otherwise the specific error
 func (c *Client) PutBucket(bucket string) (string, error) {
 	return api.PutBucket(c, bucket, nil, c.BosContext)
 }
@@ -250,9 +255,10 @@ func (c *Client) PutBucketWithArgs(bucket string, args *api.PutBucketArgs) (stri
 // DeleteBucket - delete a empty bucket
 //
 // PARAMS:
-//     - bucket: the bucket name to be deleted
+//   - bucket: the bucket name to be deleted
+//
 // RETURNS:
-//     - error: nil if delete success otherwise the specific error
+//   - error: nil if delete success otherwise the specific error
 func (c *Client) DeleteBucket(bucket string) error {
 	return api.DeleteBucket(c, bucket, c.BosContext)
 }
@@ -260,10 +266,11 @@ func (c *Client) DeleteBucket(bucket string) error {
 // GetBucketLocation - get the location fo the given bucket
 //
 // PARAMS:
-//     - bucket: the bucket name
+//   - bucket: the bucket name
+//
 // RETURNS:
-//     - string: the location of the bucket
-//     - error: nil if success otherwise the specific error
+//   - string: the location of the bucket
+//   - error: nil if success otherwise the specific error
 func (c *Client) GetBucketLocation(bucket string) (string, error) {
 	return api.GetBucketLocation(c, bucket, c.BosContext)
 }
@@ -271,10 +278,11 @@ func (c *Client) GetBucketLocation(bucket string) (string, error) {
 // PutBucketAcl - set the acl of the given bucket with acl body stream
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - aclBody: the acl json body stream
+//   - bucket: the bucket name
+//   - aclBody: the acl json body stream
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutBucketAcl(bucket string, aclBody *bce.Body) error {
 	return api.PutBucketAcl(c, bucket, "", aclBody, c.BosContext)
 }
@@ -282,10 +290,11 @@ func (c *Client) PutBucketAcl(bucket string, aclBody *bce.Body) error {
 // PutBucketAclFromCanned - set the canned acl of the given bucket
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - cannedAcl: the cannedAcl string
+//   - bucket: the bucket name
+//   - cannedAcl: the cannedAcl string
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutBucketAclFromCanned(bucket, cannedAcl string) error {
 	return api.PutBucketAcl(c, bucket, cannedAcl, nil, c.BosContext)
 }
@@ -293,10 +302,11 @@ func (c *Client) PutBucketAclFromCanned(bucket, cannedAcl string) error {
 // PutBucketAclFromFile - set the acl of the given bucket with acl json file name
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - aclFile: the acl file name
+//   - bucket: the bucket name
+//   - aclFile: the acl file name
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutBucketAclFromFile(bucket, aclFile string) error {
 	body, err := bce.NewBodyFromFile(aclFile)
 	if err != nil {
@@ -308,10 +318,11 @@ func (c *Client) PutBucketAclFromFile(bucket, aclFile string) error {
 // PutBucketAclFromString - set the acl of the given bucket with acl json string
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - aclString: the acl string with json format
+//   - bucket: the bucket name
+//   - aclString: the acl string with json format
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutBucketAclFromString(bucket, aclString string) error {
 	body, err := bce.NewBodyFromString(aclString)
 	if err != nil {
@@ -323,10 +334,11 @@ func (c *Client) PutBucketAclFromString(bucket, aclString string) error {
 // PutBucketAclFromStruct - set the acl of the given bucket with acl data structure
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - aclObj: the acl struct object
+//   - bucket: the bucket name
+//   - aclObj: the acl struct object
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutBucketAclFromStruct(bucket string, aclObj *api.PutBucketAclArgs) error {
 	jsonBytes, jsonErr := json.Marshal(aclObj)
 	if jsonErr != nil {
@@ -342,10 +354,11 @@ func (c *Client) PutBucketAclFromStruct(bucket string, aclObj *api.PutBucketAclA
 // GetBucketAcl - get the acl of the given bucket
 //
 // PARAMS:
-//     - bucket: the bucket name
+//   - bucket: the bucket name
+//
 // RETURNS:
-//     - *api.GetBucketAclResult: the result of the bucket acl
-//     - error: nil if success otherwise the specific error
+//   - *api.GetBucketAclResult: the result of the bucket acl
+//   - error: nil if success otherwise the specific error
 func (c *Client) GetBucketAcl(bucket string) (*api.GetBucketAclResult, error) {
 	return api.GetBucketAcl(c, bucket, c.BosContext)
 }
@@ -353,10 +366,11 @@ func (c *Client) GetBucketAcl(bucket string) (*api.GetBucketAclResult, error) {
 // PutBucketLogging - set the loging setting of the given bucket with json stream
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - body: the json body
+//   - bucket: the bucket name
+//   - body: the json body
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutBucketLogging(bucket string, body *bce.Body) error {
 	return api.PutBucketLogging(c, bucket, body, c.BosContext)
 }
@@ -364,10 +378,11 @@ func (c *Client) PutBucketLogging(bucket string, body *bce.Body) error {
 // PutBucketLoggingFromString - set the loging setting of the given bucket with json string
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - logging: the json format string
+//   - bucket: the bucket name
+//   - logging: the json format string
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutBucketLoggingFromString(bucket, logging string) error {
 	body, err := bce.NewBodyFromString(logging)
 	if err != nil {
@@ -379,10 +394,11 @@ func (c *Client) PutBucketLoggingFromString(bucket, logging string) error {
 // PutBucketLoggingFromStruct - set the loging setting of the given bucket with args object
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - obj: the logging setting object
+//   - bucket: the bucket name
+//   - obj: the logging setting object
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutBucketLoggingFromStruct(bucket string, obj *api.PutBucketLoggingArgs) error {
 	jsonBytes, jsonErr := json.Marshal(obj)
 	if jsonErr != nil {
@@ -398,10 +414,11 @@ func (c *Client) PutBucketLoggingFromStruct(bucket string, obj *api.PutBucketLog
 // GetBucketLogging - get the logging setting of the given bucket
 //
 // PARAMS:
-//     - bucket: the bucket name
+//   - bucket: the bucket name
+//
 // RETURNS:
-//     - *api.GetBucketLoggingResult: the logging setting of the bucket
-//     - error: nil if success otherwise the specific error
+//   - *api.GetBucketLoggingResult: the logging setting of the bucket
+//   - error: nil if success otherwise the specific error
 func (c *Client) GetBucketLogging(bucket string) (*api.GetBucketLoggingResult, error) {
 	return api.GetBucketLogging(c, bucket, c.BosContext)
 }
@@ -409,9 +426,10 @@ func (c *Client) GetBucketLogging(bucket string) (*api.GetBucketLoggingResult, e
 // DeleteBucketLogging - delete the logging setting of the given bucket
 //
 // PARAMS:
-//     - bucket: the bucket name
+//   - bucket: the bucket name
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) DeleteBucketLogging(bucket string) error {
 	return api.DeleteBucketLogging(c, bucket, c.BosContext)
 }
@@ -419,10 +437,11 @@ func (c *Client) DeleteBucketLogging(bucket string) error {
 // PutBucketLifecycle - set the lifecycle rule of the given bucket with raw stream
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - lifecycle: the lifecycle rule json body
+//   - bucket: the bucket name
+//   - lifecycle: the lifecycle rule json body
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutBucketLifecycle(bucket string, lifecycle *bce.Body) error {
 	return api.PutBucketLifecycle(c, bucket, lifecycle, c.BosContext)
 }
@@ -430,10 +449,11 @@ func (c *Client) PutBucketLifecycle(bucket string, lifecycle *bce.Body) error {
 // PutBucketLifecycleFromString - set the lifecycle rule of the given bucket with string
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - lifecycle: the lifecycle rule json format string body
+//   - bucket: the bucket name
+//   - lifecycle: the lifecycle rule json format string body
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutBucketLifecycleFromString(bucket, lifecycle string) error {
 	body, err := bce.NewBodyFromString(lifecycle)
 	if err != nil {
@@ -445,10 +465,11 @@ func (c *Client) PutBucketLifecycleFromString(bucket, lifecycle string) error {
 // GetBucketLifecycle - get the lifecycle rule of the given bucket
 //
 // PARAMS:
-//     - bucket: the bucket name
+//   - bucket: the bucket name
+//
 // RETURNS:
-//     - *api.GetBucketLifecycleResult: the lifecycle rule of the bucket
-//     - error: nil if success otherwise the specific error
+//   - *api.GetBucketLifecycleResult: the lifecycle rule of the bucket
+//   - error: nil if success otherwise the specific error
 func (c *Client) GetBucketLifecycle(bucket string) (*api.GetBucketLifecycleResult, error) {
 	return api.GetBucketLifecycle(c, bucket, c.BosContext)
 }
@@ -456,9 +477,10 @@ func (c *Client) GetBucketLifecycle(bucket string) (*api.GetBucketLifecycleResul
 // DeleteBucketLifecycle - delete the lifecycle rule of the given bucket
 //
 // PARAMS:
-//     - bucket: the bucket name
+//   - bucket: the bucket name
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) DeleteBucketLifecycle(bucket string) error {
 	return api.DeleteBucketLifecycle(c, bucket, c.BosContext)
 }
@@ -466,10 +488,11 @@ func (c *Client) DeleteBucketLifecycle(bucket string) error {
 // PutBucketStorageclass - set the storage class of the given bucket
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - storageClass: the storage class string value
+//   - bucket: the bucket name
+//   - storageClass: the storage class string value
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutBucketStorageclass(bucket, storageClass string) error {
 	return api.PutBucketStorageclass(c, bucket, storageClass, c.BosContext)
 }
@@ -477,10 +500,11 @@ func (c *Client) PutBucketStorageclass(bucket, storageClass string) error {
 // GetBucketStorageclass - get the storage class of the given bucket
 //
 // PARAMS:
-//     - bucket: the bucket name
+//   - bucket: the bucket name
+//
 // RETURNS:
-//     - string: the storage class string value
-//     - error: nil if success otherwise the specific error
+//   - string: the storage class string value
+//   - error: nil if success otherwise the specific error
 func (c *Client) GetBucketStorageclass(bucket string) (string, error) {
 	return api.GetBucketStorageclass(c, bucket, c.BosContext)
 }
@@ -488,11 +512,12 @@ func (c *Client) GetBucketStorageclass(bucket string) (string, error) {
 // PutBucketReplication - set the bucket replication config of different region
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - replicationConf: the replication config json body stream
-//     - replicationRuleId: the replication rule id composed of [0-9 A-Z a-z _ -]
+//   - bucket: the bucket name
+//   - replicationConf: the replication config json body stream
+//   - replicationRuleId: the replication rule id composed of [0-9 A-Z a-z _ -]
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutBucketReplication(bucket string, replicationConf *bce.Body, replicationRuleId string) error {
 	return api.PutBucketReplication(c, bucket, replicationConf, replicationRuleId, c.BosContext)
 }
@@ -500,11 +525,12 @@ func (c *Client) PutBucketReplication(bucket string, replicationConf *bce.Body,
 // PutBucketReplicationFromFile - set the bucket replication config with json file name
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - confFile: the config json file name
-//     - replicationRuleId: the replication rule id composed of [0-9 A-Z a-z _ -]
+//   - bucket: the bucket name
+//   - confFile: the config json file name
+//   - replicationRuleId: the replication rule id composed of [0-9 A-Z a-z _ -]
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutBucketReplicationFromFile(bucket, confFile string, replicationRuleId string) error {
 	body, err := bce.NewBodyFromFile(confFile)
 	if err != nil {
@@ -516,11 +542,12 @@ func (c *Client) PutBucketReplicationFromFile(bucket, confFile string, replicati
 // PutBucketReplicationFromString - set the bucket replication config with json string
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - confString: the config string with json format
-//     - replicationRuleId: the replication rule id composed of [0-9 A-Z a-z _ -]
+//   - bucket: the bucket name
+//   - confString: the config string with json format
+//   - replicationRuleId: the replication rule id composed of [0-9 A-Z a-z _ -]
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutBucketReplicationFromString(bucket, confString string, replicationRuleId string) error {
 	body, err := bce.NewBodyFromString(confString)
 	if err != nil {
@@ -532,11 +559,12 @@ func (c *Client) PutBucketReplicationFromString(bucket, confString string, repli
 // PutBucketReplicationFromStruct - set the bucket replication config with struct
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - confObj: the replication config struct object
-//     - replicationRuleId: the replication rule id composed of [0-9 A-Z a-z _ -]
+//   - bucket: the bucket name
+//   - confObj: the replication config struct object
+//   - replicationRuleId: the replication rule id composed of [0-9 A-Z a-z _ -]
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutBucketReplicationFromStruct(bucket string,
 	confObj *api.PutBucketReplicationArgs, replicationRuleId string) error {
 	jsonBytes, jsonErr := json.Marshal(confObj)
@@ -553,11 +581,12 @@ func (c *Client) PutBucketReplicationFromStruct(bucket string,
 // GetBucketReplication - get the bucket replication config of the given bucket
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - replicationRuleId: the replication rule id composed of [0-9 A-Z a-z _ -]
+//   - bucket: the bucket name
+//   - replicationRuleId: the replication rule id composed of [0-9 A-Z a-z _ -]
+//
 // RETURNS:
-//     - *api.GetBucketReplicationResult: the result of the bucket replication config
-//     - error: nil if success otherwise the specific error
+//   - *api.GetBucketReplicationResult: the result of the bucket replication config
+//   - error: nil if success otherwise the specific error
 func (c *Client) GetBucketReplication(bucket string, replicationRuleId string) (*api.GetBucketReplicationResult, error) {
 	return api.GetBucketReplication(c, bucket, replicationRuleId, c.BosContext)
 }
@@ -565,10 +594,11 @@ func (c *Client) GetBucketReplication(bucket string, replicationRuleId string) (
 // ListBucketReplication - get all replication config of the given bucket
 //
 // PARAMS:
-//     - bucket: the bucket name
+//   - bucket: the bucket name
+//
 // RETURNS:
-//     - *api.ListBucketReplicationResult: the list of the bucket replication config
-//     - error: nil if success otherwise the specific error
+//   - *api.ListBucketReplicationResult: the list of the bucket replication config
+//   - error: nil if success otherwise the specific error
 func (c *Client) ListBucketReplication(bucket string) (*api.ListBucketReplicationResult, error) {
 	return api.ListBucketReplication(c, bucket, c.BosContext)
 }
@@ -576,10 +606,11 @@ func (c *Client) ListBucketReplication(bucket string) (*api.ListBucketReplicatio
 // DeleteBucketReplication - delete the bucket replication config of the given bucket
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - replicationRuleId: the replication rule id composed of [0-9 A-Z a-z _ -]
+//   - bucket: the bucket name
+//   - replicationRuleId: the replication rule id composed of [0-9 A-Z a-z _ -]
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) DeleteBucketReplication(bucket string, replicationRuleId string) error {
 	return api.DeleteBucketReplication(c, bucket, replicationRuleId, c.BosContext)
 }
@@ -587,11 +618,12 @@ func (c *Client) DeleteBucketReplication(bucket string, replicationRuleId string
 // GetBucketReplicationProgress - get the bucket replication process of the given bucket
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - replicationRuleId: the replication rule id composed of [0-9 A-Z a-z _ -]
+//   - bucket: the bucket name
+//   - replicationRuleId: the replication rule id composed of [0-9 A-Z a-z _ -]
+//
 // RETURNS:
-//     - *api.GetBucketReplicationProgressResult: the process of the bucket replication
-//     - error: nil if success otherwise the specific error
+//   - *api.GetBucketReplicationProgressResult: the process of the bucket replication
+//   - error: nil if success otherwise the specific error
 func (c *Client) GetBucketReplicationProgress(bucket string, replicationRuleId string) (
 	*api.GetBucketReplicationProgressResult, error) {
 	return api.GetBucketReplicationProgress(c, bucket, replicationRuleId, c.BosContext)
@@ -600,10 +632,11 @@ func (c *Client) GetBucketReplicationProgress(bucket string, replicationRuleId s
 // PutBucketEncryption - set the bucket encryption config of the given bucket
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - algorithm: the encryption algorithm name
+//   - bucket: the bucket name
+//   - algorithm: the encryption algorithm name
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutBucketEncryption(bucket, algorithm string) error {
 	return api.PutBucketEncryption(c, bucket, algorithm, c.BosContext)
 }
@@ -611,10 +644,11 @@ func (c *Client) PutBucketEncryption(bucket, algorithm string) error {
 // GetBucketEncryption - get the bucket encryption config
 //
 // PARAMS:
-//     - bucket: the bucket name
+//   - bucket: the bucket name
+//
 // RETURNS:
-//     - string: the encryption algorithm name
-//     - error: nil if success otherwise the specific error
+//   - string: the encryption algorithm name
+//   - error: nil if success otherwise the specific error
 func (c *Client) GetBucketEncryption(bucket string) (string, error) {
 	return api.GetBucketEncryption(c, bucket, c.BosContext)
 }
@@ -622,9 +656,10 @@ func (c *Client) GetBucketEncryption(bucket string) (string, error) {
 // DeleteBucketEncryption - delete the bucket encryption config of the given bucket
 //
 // PARAMS:
-//     - bucket: the bucket name
+//   - bucket: the bucket name
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) DeleteBucketEncryption(bucket string) error {
 	return api.DeleteBucketEncryption(c, bucket, c.BosContext)
 }
@@ -632,10 +667,11 @@ func (c *Client) DeleteBucketEncryption(bucket string) error {
 // PutBucketStaticWebsite - set the bucket static website config
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - config: the static website config body stream
+//   - bucket: the bucket name
+//   - config: the static website config body stream
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutBucketStaticWebsite(bucket string, config *bce.Body) error {
 	return api.PutBucketStaticWebsite(c, bucket, config, c.BosContext)
 }
@@ -643,10 +679,11 @@ func (c *Client) PutBucketStaticWebsite(bucket string, config *bce.Body) error {
 // PutBucketStaticWebsiteFromString - set the bucket static website config from json string
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - jsonConfig: the static website config json string
+//   - bucket: the bucket name
+//   - jsonConfig: the static website config json string
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutBucketStaticWebsiteFromString(bucket, jsonConfig string) error {
 	body, err := bce.NewBodyFromString(jsonConfig)
 	if err != nil {
@@ -658,10 +695,11 @@ func (c *Client) PutBucketStaticWebsiteFromString(bucket, jsonConfig string) err
 // PutBucketStaticWebsiteFromStruct - set the bucket static website config from struct
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - confObj: the static website config object
+//   - bucket: the bucket name
+//   - confObj: the static website config object
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutBucketStaticWebsiteFromStruct(bucket string,
 	confObj *api.PutBucketStaticWebsiteArgs) error {
 	jsonBytes, jsonErr := json.Marshal(confObj)
@@ -678,11 +716,12 @@ func (c *Client) PutBucketStaticWebsiteFromStruct(bucket string,
 // SimplePutBucketStaticWebsite - simple set the bucket static website config
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - index: the static website config for index file name
-//     - notFound: the static website config for notFound file name
+//   - bucket: the bucket name
+//   - index: the static website config for index file name
+//   - notFound: the static website config for notFound file name
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) SimplePutBucketStaticWebsite(bucket, index, notFound string) error {
 	confObj := &api.PutBucketStaticWebsiteArgs{index, notFound}
 	return c.PutBucketStaticWebsiteFromStruct(bucket, confObj)
@@ -691,10 +730,11 @@ func (c *Client) SimplePutBucketStaticWebsite(bucket, index, notFound string) er
 // GetBucketStaticWebsite - get the bucket static website config
 //
 // PARAMS:
-//     - bucket: the bucket name
+//   - bucket: the bucket name
+//
 // RETURNS:
-//     - result: the static website config result object
-//     - error: nil if success otherwise the specific error
+//   - result: the static website config result object
+//   - error: nil if success otherwise the specific error
 func (c *Client) GetBucketStaticWebsite(bucket string) (
 	*api.GetBucketStaticWebsiteResult, error) {
 	return api.GetBucketStaticWebsite(c, bucket, c.BosContext)
@@ -703,9 +743,10 @@ func (c *Client) GetBucketStaticWebsite(bucket string) (
 // DeleteBucketStaticWebsite - delete the bucket static website config of the given bucket
 //
 // PARAMS:
-//     - bucket: the bucket name
+//   - bucket: the bucket name
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) DeleteBucketStaticWebsite(bucket string) error {
 	return api.DeleteBucketStaticWebsite(c, bucket, c.BosContext)
 }
@@ -713,10 +754,11 @@ func (c *Client) DeleteBucketStaticWebsite(bucket string) error {
 // PutBucketCors - set the bucket CORS config
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - config: the bucket CORS config body stream
+//   - bucket: the bucket name
+//   - config: the bucket CORS config body stream
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutBucketCors(bucket string, config *bce.Body) error {
 	return api.PutBucketCors(c, bucket, config, c.BosContext)
 }
@@ -724,10 +766,11 @@ func (c *Client) PutBucketCors(bucket string, config *bce.Body) error {
 // PutBucketCorsFromFile - set the bucket CORS config from json config file
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - filename: the bucket CORS json config file name
+//   - bucket: the bucket name
+//   - filename: the bucket CORS json config file name
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutBucketCorsFromFile(bucket, filename string) error {
 	body, err := bce.NewBodyFromFile(filename)
 	if err != nil {
@@ -739,10 +782,11 @@ func (c *Client) PutBucketCorsFromFile(bucket, filename string) error {
 // PutBucketCorsFromString - set the bucket CORS config from json config string
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - filename: the bucket CORS json config string
+//   - bucket: the bucket name
+//   - filename: the bucket CORS json config string
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutBucketCorsFromString(bucket, jsonConfig string) error {
 	body, err := bce.NewBodyFromString(jsonConfig)
 	if err != nil {
@@ -754,10 +798,11 @@ func (c *Client) PutBucketCorsFromString(bucket, jsonConfig string) error {
 // PutBucketCorsFromStruct - set the bucket CORS config from json config object
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - filename: the bucket CORS json config object
+//   - bucket: the bucket name
+//   - filename: the bucket CORS json config object
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutBucketCorsFromStruct(bucket string, confObj *api.PutBucketCorsArgs) error {
 	jsonBytes, jsonErr := json.Marshal(confObj)
 	if jsonErr != nil {
@@ -773,10 +818,11 @@ func (c *Client) PutBucketCorsFromStruct(bucket string, confObj *api.PutBucketCo
 // GetBucketCors - get the bucket CORS config
 //
 // PARAMS:
-//     - bucket: the bucket name
+//   - bucket: the bucket name
+//
 // RETURNS:
-//     - result: the bucket CORS config result object
-//     - error: nil if success otherwise the specific error
+//   - result: the bucket CORS config result object
+//   - error: nil if success otherwise the specific error
 func (c *Client) GetBucketCors(bucket string) (*api.GetBucketCorsResult, error) {
 	return api.GetBucketCors(c, bucket, c.BosContext)
 }
@@ -784,9 +830,10 @@ func (c *Client) GetBucketCors(bucket string) (*api.GetBucketCorsResult, error)
 // DeleteBucketCors - delete the bucket CORS config of the given bucket
 //
 // PARAMS:
-//     - bucket: the bucket name
+//   - bucket: the bucket name
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) DeleteBucketCors(bucket string) error {
 	return api.DeleteBucketCors(c, bucket, c.BosContext)
 }
@@ -794,11 +841,12 @@ func (c *Client) DeleteBucketCors(bucket string) error {
 // PutBucketCopyrightProtection - set the copyright protection config of the given bucket
 //
 // PARAMS:
-//     - cli: the client agent which can perform sending request
-//     - bucket: the bucket name
-//     - resources: the resource items in the bucket to be protected
+//   - cli: the client agent which can perform sending request
+//   - bucket: the bucket name
+//   - resources: the resource items in the bucket to be protected
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutBucketCopyrightProtection(bucket string, resources ...string) error {
 	return api.PutBucketCopyrightProtection(c, c.BosContext, bucket, resources...)
 }
@@ -806,10 +854,11 @@ func (c *Client) PutBucketCopyrightProtection(bucket string, resources ...string
 // GetBucketCopyrightProtection - get the bucket copyright protection config
 //
 // PARAMS:
-//     - bucket: the bucket name
+//   - bucket: the bucket name
+//
 // RETURNS:
-//     - result: the bucket copyright protection config resources
-//     - error: nil if success otherwise the specific error
+//   - result: the bucket copyright protection config resources
+//   - error: nil if success otherwise the specific error
 func (c *Client) GetBucketCopyrightProtection(bucket string) ([]string, error) {
 	return api.GetBucketCopyrightProtection(c, bucket, c.BosContext)
 }
@@ -817,9 +866,10 @@ func (c *Client) GetBucketCopyrightProtection(bucket string) ([]string, error) {
 // DeleteBucketCopyrightProtection - delete the bucket copyright protection config
 //
 // PARAMS:
-//     - bucket: the bucket name
+//   - bucket: the bucket name
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) DeleteBucketCopyrightProtection(bucket string) error {
 	return api.DeleteBucketCopyrightProtection(c, bucket, c.BosContext)
 }
@@ -827,13 +877,14 @@ func (c *Client) DeleteBucketCopyrightProtection(bucket string) error {
 // PutObject - upload a new object or rewrite the existed object with raw stream
 //
 // PARAMS:
-//     - bucket: the name of the bucket to store the object
-//     - object: the name of the object
-//     - body: the object content body
-//     - args: the optional arguments
+//   - bucket: the name of the bucket to store the object
+//   - object: the name of the object
+//   - body: the object content body
+//   - args: the optional arguments
+//
 // RETURNS:
-//     - string: etag of the uploaded object
-//     - error: the uploaded error if any occurs
+//   - string: etag of the uploaded object
+//   - error: the uploaded error if any occurs
 func (c *Client) PutObject(bucket, object string, body *bce.Body,
 	args *api.PutObjectArgs) (string, error) {
 	etag, _, err := api.PutObject(c, bucket, object, body, args, c.BosContext)
@@ -843,27 +894,29 @@ func (c *Client) PutObject(bucket, object string, body *bce.Body,
 // BasicPutObject - the basic interface of uploading an object
 //
 // PARAMS:
-//     - bucket: the name of the bucket to store the object
-//     - object: the name of the object
-//     - body: the object content body
+//   - bucket: the name of the bucket to store the object
+//   - object: the name of the object
+//   - body: the object content body
+//
 // RETURNS:
-//     - string: etag of the uploaded object
-//     - error: the uploaded error if any occurs
+//   - string: etag of the uploaded object
+//   - error: the uploaded error if any occurs
 func (c *Client) BasicPutObject(bucket, object string, body *bce.Body) (string, error) {
- 	etag , _, err := api.PutObject(c, bucket, object, body, nil, c.BosContext)
+	etag, _, err := api.PutObject(c, bucket, object, body, nil, c.BosContext)
 	return etag, err
 }
 
 // PutObjectFromBytes - upload a new object or rewrite the existed object from a byte array
 //
 // PARAMS:
-//     - bucket: the name of the bucket to store the object
-//     - object: the name of the object
-//     - bytesArr: the content byte array
-//     - args: the optional arguments
+//   - bucket: the name of the bucket to store the object
+//   - object: the name of the object
+//   - bytesArr: the content byte array
+//   - args: the optional arguments
+//
 // RETURNS:
-//     - string: etag of the uploaded object
-//     - error: the uploaded error if any occurs
+//   - string: etag of the uploaded object
+//   - error: the uploaded error if any occurs
 func (c *Client) PutObjectFromBytes(bucket, object string, bytesArr []byte,
 	args *api.PutObjectArgs) (string, error) {
 	body, err := bce.NewBodyFromBytes(bytesArr)
@@ -878,20 +931,21 @@ func (c *Client) PutObjectFromBytes(bucket, object string, bytesArr []byte,
 // PutObjectFromString - upload a new object or rewrite the existed object from a string
 //
 // PARAMS:
-//     - bucket: the name of the bucket to store the object
-//     - object: the name of the object
-//     - content: the content string
-//     - args: the optional arguments
+//   - bucket: the name of the bucket to store the object
+//   - object: the name of the object
+//   - content: the content string
+//   - args: the optional arguments
+//
 // RETURNS:
-//     - string: etag of the uploaded object
-//     - error: the uploaded error if any occurs
+//   - string: etag of the uploaded object
+//   - error: the uploaded error if any occurs
 func (c *Client) PutObjectFromString(bucket, object, content string,
 	args *api.PutObjectArgs) (string, error) {
 	body, err := bce.NewBodyFromString(content)
 	if err != nil {
 		return "", err
 	}
-	etag , _, err := api.PutObject(c, bucket, object, body, args, c.BosContext)
+	etag, _, err := api.PutObject(c, bucket, object, body, args, c.BosContext)
 	return etag, err
 
 }
@@ -899,40 +953,42 @@ func (c *Client) PutObjectFromString(bucket, object, content string,
 // PutObjectFromFile - upload a new object or rewrite the existed object from a local file
 //
 // PARAMS:
-//     - bucket: the name of the bucket to store the object
-//     - object: the name of the object
-//     - fileName: the local file full path name
-//     - args: the optional arguments
+//   - bucket: the name of the bucket to store the object
+//   - object: the name of the object
+//   - fileName: the local file full path name
+//   - args: the optional arguments
+//
 // RETURNS:
-//     - string: etag of the uploaded object
-//     - error: the uploaded error if any occurs
+//   - string: etag of the uploaded object
+//   - error: the uploaded error if any occurs
 func (c *Client) PutObjectFromFile(bucket, object, fileName string,
 	args *api.PutObjectArgs) (string, error) {
 	body, err := bce.NewBodyFromFile(fileName)
 	if err != nil {
 		return "", err
 	}
-	etag , _, err := api.PutObject(c, bucket, object, body, args, c.BosContext)
+	etag, _, err := api.PutObject(c, bucket, object, body, args, c.BosContext)
 	return etag, err
 }
 
 // PutObjectFromStream - upload a new object or rewrite the existed object from stream
 //
 // PARAMS:
-//     - bucket: the name of the bucket to store the object
-//     - object: the name of the object
-//     - fileName: the local file full path name
-//     - args: the optional arguments
+//   - bucket: the name of the bucket to store the object
+//   - object: the name of the object
+//   - fileName: the local file full path name
+//   - args: the optional arguments
+//
 // RETURNS:
-//     - string: etag of the uploaded object
-//     - error: the uploaded error if any occurs
+//   - string: etag of the uploaded object
+//   - error: the uploaded error if any occurs
 func (c *Client) PutObjectFromStream(bucket, object string, reader io.Reader,
 	args *api.PutObjectArgs) (string, error) {
 	body, err := bce.NewBodyFromSizedReader(reader, -1)
 	if err != nil {
 		return "", err
 	}
-	etag , _, err := api.PutObject(c, bucket, object, body, args, c.BosContext)
+	etag, _, err := api.PutObject(c, bucket, object, body, args, c.BosContext)
 	return etag, err
 }
 
@@ -955,15 +1011,16 @@ func (c *Client) PutObjectWithCallback(bucket, object string, body *bce.Body,
 // CopyObject - copy a remote object to another one
 //
 // PARAMS:
-//     - bucket: the name of the destination bucket
-//     - object: the name of the destination object
-//     - srcBucket: the name of the source bucket
-//     - srcObject: the name of the source object
-//     - args: the optional arguments for copying object which are MetadataDirective, StorageClass,
-//       IfMatch, IfNoneMatch, ifModifiedSince, IfUnmodifiedSince
+//   - bucket: the name of the destination bucket
+//   - object: the name of the destination object
+//   - srcBucket: the name of the source bucket
+//   - srcObject: the name of the source object
+//   - args: the optional arguments for copying object which are MetadataDirective, StorageClass,
+//     IfMatch, IfNoneMatch, ifModifiedSince, IfUnmodifiedSince
+//
 // RETURNS:
-//     - *api.CopyObjectResult: result struct which contains "ETag" and "LastModified" fields
-//     - error: any error if it occurs
+//   - *api.CopyObjectResult: result struct which contains "ETag" and "LastModified" fields
+//   - error: any error if it occurs
 func (c *Client) CopyObject(bucket, object, srcBucket, srcObject string,
 	args *api.CopyObjectArgs) (*api.CopyObjectResult, error) {
 	source := fmt.Sprintf("/%s/%s", srcBucket, srcObject)
@@ -973,13 +1030,14 @@ func (c *Client) CopyObject(bucket, object, srcBucket, srcObject string,
 // BasicCopyObject - the basic interface of copying a object to another one
 //
 // PARAMS:
-//     - bucket: the name of the destination bucket
-//     - object: the name of the destination object
-//     - srcBucket: the name of the source bucket
-//     - srcObject: the name of the source object
+//   - bucket: the name of the destination bucket
+//   - object: the name of the destination object
+//   - srcBucket: the name of the source bucket
+//   - srcObject: the name of the source object
+//
 // RETURNS:
-//     - *api.CopyObjectResult: result struct which contains "ETag" and "LastModified" fields
-//     - error: any error if it occurs
+//   - *api.CopyObjectResult: result struct which contains "ETag" and "LastModified" fields
+//   - error: any error if it occurs
 func (c *Client) BasicCopyObject(bucket, object, srcBucket,
 	srcObject string) (*api.CopyObjectResult, error) {
 	source := fmt.Sprintf("/%s/%s", srcBucket, srcObject)
@@ -989,14 +1047,15 @@ func (c *Client) BasicCopyObject(bucket, object, srcBucket,
 // GetObject - get the given object with raw stream return
 //
 // PARAMS:
-//     - bucket: the name of the bucket
-//     - object: the name of the object
-//     - args: the optional args in querysring
-//     - ranges: the optional range start and end to get the given object
+//   - bucket: the name of the bucket
+//   - object: the name of the object
+//   - args: the optional args in querysring
+//   - ranges: the optional range start and end to get the given object
+//
 // RETURNS:
-//     - *api.GetObjectResult: result struct which contains "Body" and header fields
-//       for details reference https://cloud.baidu.com/doc/BOS/API.html#GetObject.E6.8E.A5.E5.8F.A3
-//     - error: any error if it occurs
+//   - *api.GetObjectResult: result struct which contains "Body" and header fields
+//     for details reference https://cloud.baidu.com/doc/BOS/API.html#GetObject.E6.8E.A5.E5.8F.A3
+//   - error: any error if it occurs
 func (c *Client) GetObject(bucket, object string, args map[string]string,
 	ranges ...int64) (*api.GetObjectResult, error) {
 	return api.GetObject(c, bucket, object, c.BosContext, args, ranges...)
@@ -1005,12 +1064,13 @@ func (c *Client) GetObject(bucket, object string, args map[string]string,
 // BasicGetObject - the basic interface of geting the given object
 //
 // PARAMS:
-//     - bucket: the name of the bucket
-//     - object: the name of the object
+//   - bucket: the name of the bucket
+//   - object: the name of the object
+//
 // RETURNS:
-//     - *api.GetObjectResult: result struct which contains "Body" and header fields
-//       for details reference https://cloud.baidu.com/doc/BOS/API.html#GetObject.E6.8E.A5.E5.8F.A3
-//     - error: any error if it occurs
+//   - *api.GetObjectResult: result struct which contains "Body" and header fields
+//     for details reference https://cloud.baidu.com/doc/BOS/API.html#GetObject.E6.8E.A5.E5.8F.A3
+//   - error: any error if it occurs
 func (c *Client) BasicGetObject(bucket, object string) (*api.GetObjectResult, error) {
 	return api.GetObject(c, bucket, object, c.BosContext, nil)
 }
@@ -1018,11 +1078,12 @@ func (c *Client) BasicGetObject(bucket, object string) (*api.GetObjectResult, er
 // BasicGetObjectToFile - use basic interface to get the given object to the given file path
 //
 // PARAMS:
-//     - bucket: the name of the bucket
-//     - object: the name of the object
-//     - filePath: the file path to store the object content
+//   - bucket: the name of the bucket
+//   - object: the name of the object
+//   - filePath: the file path to store the object content
+//
 // RETURNS:
-//     - error: any error if it occurs
+//   - error: any error if it occurs
 func (c *Client) BasicGetObjectToFile(bucket, object, filePath string) error {
 	res, err := api.GetObject(c, bucket, object, c.BosContext, nil)
 	if err != nil {
@@ -1049,12 +1110,13 @@ func (c *Client) BasicGetObjectToFile(bucket, object, filePath string) error {
 // GetObjectMeta - get the given object metadata
 //
 // PARAMS:
-//     - bucket: the name of the bucket
-//     - object: the name of the object
+//   - bucket: the name of the bucket
+//   - object: the name of the object
+//
 // RETURNS:
-//     - *api.GetObjectMetaResult: metadata result, for details reference
-//       https://cloud.baidu.com/doc/BOS/API.html#GetObjectMeta.E6.8E.A5.E5.8F.A3
-//     - error: any error if it occurs
+//   - *api.GetObjectMetaResult: metadata result, for details reference
+//     https://cloud.baidu.com/doc/BOS/API.html#GetObjectMeta.E6.8E.A5.E5.8F.A3
+//   - error: any error if it occurs
 func (c *Client) GetObjectMeta(bucket, object string) (*api.GetObjectMetaResult, error) {
 	return api.GetObjectMeta(c, bucket, object, c.BosContext)
 }
@@ -1062,12 +1124,13 @@ func (c *Client) GetObjectMeta(bucket, object string) (*api.GetObjectMetaResult,
 // SelectObject - select the object content
 //
 // PARAMS:
-//     - bucket: the name of the bucket
-//     - object: the name of the object
-//     - args: the optional arguments to select the object
+//   - bucket: the name of the bucket
+//   - object: the name of the object
+//   - args: the optional arguments to select the object
+//
 // RETURNS:
-//     - *api.SelectObjectResult: select object result
-//     - error: any error if it occurs
+//   - *api.SelectObjectResult: select object result
+//   - error: any error if it occurs
 func (c *Client) SelectObject(bucket, object string, args *api.SelectObjectArgs) (*api.SelectObjectResult, error) {
 	return api.SelectObject(c, bucket, object, args, c.BosContext)
 }
@@ -1075,13 +1138,14 @@ func (c *Client) SelectObject(bucket, object string, args *api.SelectObjectArgs)
 // FetchObject - fetch the object content from the given source and store
 //
 // PARAMS:
-//     - bucket: the name of the bucket to store
-//     - object: the name of the object to store
-//     - source: fetch source url
-//     - args: the optional arguments to fetch the object
+//   - bucket: the name of the bucket to store
+//   - object: the name of the object to store
+//   - source: fetch source url
+//   - args: the optional arguments to fetch the object
+//
 // RETURNS:
-//     - *api.FetchObjectResult: result struct with Code, Message, RequestId and JobId fields
-//     - error: any error if it occurs
+//   - *api.FetchObjectResult: result struct with Code, Message, RequestId and JobId fields
+//   - error: any error if it occurs
 func (c *Client) FetchObject(bucket, object, source string,
 	args *api.FetchObjectArgs) (*api.FetchObjectResult, error) {
 	return api.FetchObject(c, bucket, object, source, args, c.BosContext)
@@ -1090,12 +1154,13 @@ func (c *Client) FetchObject(bucket, object, source string,
 // BasicFetchObject - the basic interface of the fetch object api
 //
 // PARAMS:
-//     - bucket: the name of the bucket to store
-//     - object: the name of the object to store
-//     - source: fetch source url
+//   - bucket: the name of the bucket to store
+//   - object: the name of the object to store
+//   - source: fetch source url
+//
 // RETURNS:
-//     - *api.FetchObjectResult: result struct with Code, Message, RequestId and JobId fields
-//     - error: any error if it occurs
+//   - *api.FetchObjectResult: result struct with Code, Message, RequestId and JobId fields
+//   - error: any error if it occurs
 func (c *Client) BasicFetchObject(bucket, object, source string) (*api.FetchObjectResult, error) {
 	return api.FetchObject(c, bucket, object, source, nil, c.BosContext)
 }
@@ -1103,30 +1168,37 @@ func (c *Client) BasicFetchObject(bucket, object, source string) (*api.FetchObje
 // SimpleFetchObject - fetch object with simple arguments interface
 //
 // PARAMS:
-//     - bucket: the name of the bucket to store
-//     - object: the name of the object to store
-//     - source: fetch source url
-//     - mode: fetch mode which supports sync and async
-//     - storageClass: the storage class of the fetched object
+//   - bucket: the name of the bucket to store
+//   - object: the name of the object to store
+//   - source: fetch source url
+//   - mode: fetch mode which supports sync and async
+//   - storageClass: the storage class of the fetched object
+//
 // RETURNS:
-//     - *api.FetchObjectResult: result struct with Code, Message, RequestId and JobId fields
-//     - error: any error if it occurs
+//   - *api.FetchObjectResult: result struct with Code, Message, RequestId and JobId fields
+//   - error: any error if it occurs
 func (c *Client) SimpleFetchObject(bucket, object, source, mode,
 	storageClass string) (*api.FetchObjectResult, error) {
-	args := &api.FetchObjectArgs{mode, storageClass}
+
+	args := &api.FetchObjectArgs{
+		FetchMode:    mode,
+		StorageClass: storageClass,
+	}
+
 	return api.FetchObject(c, bucket, object, source, args, c.BosContext)
 }
 
 // AppendObject - append the given content to a new or existed object which is appendable
 //
 // PARAMS:
-//     - bucket: the name of the bucket
-//     - object: the name of the object
-//     - content: the append object stream
-//     - args: the optional arguments to append object
+//   - bucket: the name of the bucket
+//   - object: the name of the object
+//   - content: the append object stream
+//   - args: the optional arguments to append object
+//
 // RETURNS:
-//     - *api.AppendObjectResult: the result of the appended object
-//     - error: any error if it occurs
+//   - *api.AppendObjectResult: the result of the appended object
+//   - error: any error if it occurs
 func (c *Client) AppendObject(bucket, object string, content *bce.Body,
 	args *api.AppendObjectArgs) (*api.AppendObjectResult, error) {
 	return api.AppendObject(c, bucket, object, content, args, c.BosContext)
@@ -1135,13 +1207,14 @@ func (c *Client) AppendObject(bucket, object string, content *bce.Body,
 // SimpleAppendObject - the interface to append object with simple offset argument
 //
 // PARAMS:
-//     - bucket: the name of the bucket
-//     - object: the name of the object
-//     - content: the append object stream
-//     - offset: the offset of where to append
+//   - bucket: the name of the bucket
+//   - object: the name of the object
+//   - content: the append object stream
+//   - offset: the offset of where to append
+//
 // RETURNS:
-//     - *api.AppendObjectResult: the result of the appended object
-//     - error: any error if it occurs
+//   - *api.AppendObjectResult: the result of the appended object
+//   - error: any error if it occurs
 func (c *Client) SimpleAppendObject(bucket, object string, content *bce.Body,
 	offset int64) (*api.AppendObjectResult, error) {
 	return api.AppendObject(c, bucket, object, content, &api.AppendObjectArgs{Offset: offset}, c.BosContext)
@@ -1150,13 +1223,14 @@ func (c *Client) SimpleAppendObject(bucket, object string, content *bce.Body,
 // SimpleAppendObjectFromString - the simple interface of appending an object from a string
 //
 // PARAMS:
-//     - bucket: the name of the bucket
-//     - object: the name of the object
-//     - content: the object string to append
-//     - offset: the offset of where to append
+//   - bucket: the name of the bucket
+//   - object: the name of the object
+//   - content: the object string to append
+//   - offset: the offset of where to append
+//
 // RETURNS:
-//     - *api.AppendObjectResult: the result of the appended object
-//     - error: any error if it occurs
+//   - *api.AppendObjectResult: the result of the appended object
+//   - error: any error if it occurs
 func (c *Client) SimpleAppendObjectFromString(bucket, object, content string,
 	offset int64) (*api.AppendObjectResult, error) {
 	body, err := bce.NewBodyFromString(content)
@@ -1169,13 +1243,14 @@ func (c *Client) SimpleAppendObjectFromString(bucket, object, content string,
 // SimpleAppendObjectFromFile - the simple interface of appending an object from a file
 //
 // PARAMS:
-//     - bucket: the name of the bucket
-//     - object: the name of the object
-//     - filePath: the full file path
-//     - offset: the offset of where to append
+//   - bucket: the name of the bucket
+//   - object: the name of the object
+//   - filePath: the full file path
+//   - offset: the offset of where to append
+//
 // RETURNS:
-//     - *api.AppendObjectResult: the result of the appended object
-//     - error: any error if it occurs
+//   - *api.AppendObjectResult: the result of the appended object
+//   - error: any error if it occurs
 func (c *Client) SimpleAppendObjectFromFile(bucket, object, filePath string,
 	offset int64) (*api.AppendObjectResult, error) {
 	body, err := bce.NewBodyFromFile(filePath)
@@ -1188,10 +1263,11 @@ func (c *Client) SimpleAppendObjectFromFile(bucket, object, filePath string,
 // DeleteObject - delete the given object
 //
 // PARAMS:
-//     - bucket: the name of the bucket to delete
-//     - object: the name of the object to delete
+//   - bucket: the name of the bucket to delete
+//   - object: the name of the object to delete
+//
 // RETURNS:
-//     - error: any error if it occurs
+//   - error: any error if it occurs
 func (c *Client) DeleteObject(bucket, object string) error {
 	return api.DeleteObject(c, bucket, object, c.BosContext)
 }
@@ -1199,11 +1275,12 @@ func (c *Client) DeleteObject(bucket, object string) error {
 // DeleteMultipleObjects - delete a list of objects
 //
 // PARAMS:
-//     - bucket: the name of the bucket to delete
-//     - objectListStream: the object list stream to be deleted
+//   - bucket: the name of the bucket to delete
+//   - objectListStream: the object list stream to be deleted
+//
 // RETURNS:
-//     - *api.DeleteMultipleObjectsResult: the delete information
-//     - error: any error if it occurs
+//   - *api.DeleteMultipleObjectsResult: the delete information
+//   - error: any error if it occurs
 func (c *Client) DeleteMultipleObjects(bucket string,
 	objectListStream *bce.Body) (*api.DeleteMultipleObjectsResult, error) {
 	return api.DeleteMultipleObjects(c, bucket, objectListStream, c.BosContext)
@@ -1212,11 +1289,12 @@ func (c *Client) DeleteMultipleObjects(bucket string,
 // DeleteMultipleObjectsFromString - delete a list of objects with json format string
 //
 // PARAMS:
-//     - bucket: the name of the bucket to delete
-//     - objectListString: the object list string to be deleted
+//   - bucket: the name of the bucket to delete
+//   - objectListString: the object list string to be deleted
+//
 // RETURNS:
-//     - *api.DeleteMultipleObjectsResult: the delete information
-//     - error: any error if it occurs
+//   - *api.DeleteMultipleObjectsResult: the delete information
+//   - error: any error if it occurs
 func (c *Client) DeleteMultipleObjectsFromString(bucket,
 	objectListString string) (*api.DeleteMultipleObjectsResult, error) {
 	body, err := bce.NewBodyFromString(objectListString)
@@ -1229,11 +1307,12 @@ func (c *Client) DeleteMultipleObjectsFromString(bucket,
 // DeleteMultipleObjectsFromStruct - delete a list of objects with object list struct
 //
 // PARAMS:
-//     - bucket: the name of the bucket to delete
-//     - objectListStruct: the object list struct to be deleted
+//   - bucket: the name of the bucket to delete
+//   - objectListStruct: the object list struct to be deleted
+//
 // RETURNS:
-//     - *api.DeleteMultipleObjectsResult: the delete information
-//     - error: any error if it occurs
+//   - *api.DeleteMultipleObjectsResult: the delete information
+//   - error: any error if it occurs
 func (c *Client) DeleteMultipleObjectsFromStruct(bucket string,
 	objectListStruct *api.DeleteMultipleObjectsArgs) (*api.DeleteMultipleObjectsResult, error) {
 	jsonBytes, jsonErr := json.Marshal(objectListStruct)
@@ -1250,11 +1329,12 @@ func (c *Client) DeleteMultipleObjectsFromStruct(bucket string,
 // DeleteMultipleObjectsFromKeyList - delete a list of objects with given key string array
 //
 // PARAMS:
-//     - bucket: the name of the bucket to delete
-//     - keyList: the key string list to be deleted
+//   - bucket: the name of the bucket to delete
+//   - keyList: the key string list to be deleted
+//
 // RETURNS:
-//     - *api.DeleteMultipleObjectsResult: the delete information
-//     - error: any error if it occurs
+//   - *api.DeleteMultipleObjectsResult: the delete information
+//   - error: any error if it occurs
 func (c *Client) DeleteMultipleObjectsFromKeyList(bucket string,
 	keyList []string) (*api.DeleteMultipleObjectsResult, error) {
 	if len(keyList) == 0 {
@@ -1280,14 +1360,15 @@ func (c *Client) DeleteMultipleObjectsFromKeyList(bucket string,
 // InitiateMultipartUpload - initiate a multipart upload to get a upload ID
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - object: the object name
-//     - contentType: the content type of the object to be uploaded which should be specified,
-//       otherwise use the default(application/octet-stream)
-//     - args: the optional arguments
+//   - bucket: the bucket name
+//   - object: the object name
+//   - contentType: the content type of the object to be uploaded which should be specified,
+//     otherwise use the default(application/octet-stream)
+//   - args: the optional arguments
+//
 // RETURNS:
-//     - *InitiateMultipartUploadResult: the result data structure
-//     - error: nil if ok otherwise the specific error
+//   - *InitiateMultipartUploadResult: the result data structure
+//   - error: nil if ok otherwise the specific error
 func (c *Client) InitiateMultipartUpload(bucket, object, contentType string,
 	args *api.InitiateMultipartUploadArgs) (*api.InitiateMultipartUploadResult, error) {
 	return api.InitiateMultipartUpload(c, bucket, object, contentType, args, c.BosContext)
@@ -1296,11 +1377,12 @@ func (c *Client) InitiateMultipartUpload(bucket, object, contentType string,
 // BasicInitiateMultipartUpload - basic interface to initiate a multipart upload
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - object: the object name
+//   - bucket: the bucket name
+//   - object: the object name
+//
 // RETURNS:
-//     - *InitiateMultipartUploadResult: the result data structure
-//     - error: nil if ok otherwise the specific error
+//   - *InitiateMultipartUploadResult: the result data structure
+//   - error: nil if ok otherwise the specific error
 func (c *Client) BasicInitiateMultipartUpload(bucket,
 	object string) (*api.InitiateMultipartUploadResult, error) {
 	return api.InitiateMultipartUpload(c, bucket, object, "", nil, c.BosContext)
@@ -1309,15 +1391,16 @@ func (c *Client) BasicInitiateMultipartUpload(bucket,
 // UploadPart - upload the single part in the multipart upload process
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - object: the object name
-//     - uploadId: the multipart upload id
-//     - partNumber: the current part number
-//     - content: the uploaded part content
-//     - args: the optional arguments
+//   - bucket: the bucket name
+//   - object: the object name
+//   - uploadId: the multipart upload id
+//   - partNumber: the current part number
+//   - content: the uploaded part content
+//   - args: the optional arguments
+//
 // RETURNS:
-//     - string: the etag of the uploaded part
-//     - error: nil if ok otherwise the specific error
+//   - string: the etag of the uploaded part
+//   - error: nil if ok otherwise the specific error
 func (c *Client) UploadPart(bucket, object, uploadId string, partNumber int,
 	content *bce.Body, args *api.UploadPartArgs) (string, error) {
 	return api.UploadPart(c, bucket, object, uploadId, partNumber, content, args, c.BosContext)
@@ -1326,14 +1409,15 @@ func (c *Client) UploadPart(bucket, object, uploadId string, partNumber int,
 // BasicUploadPart - basic interface to upload the single part in the multipart upload process
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - object: the object name
-//     - uploadId: the multipart upload id
-//     - partNumber: the current part number
-//     - content: the uploaded part content
+//   - bucket: the bucket name
+//   - object: the object name
+//   - uploadId: the multipart upload id
+//   - partNumber: the current part number
+//   - content: the uploaded part content
+//
 // RETURNS:
-//     - string: the etag of the uploaded part
-//     - error: nil if ok otherwise the specific error
+//   - string: the etag of the uploaded part
+//   - error: nil if ok otherwise the specific error
 func (c *Client) BasicUploadPart(bucket, object, uploadId string, partNumber int,
 	content *bce.Body) (string, error) {
 	return api.UploadPart(c, bucket, object, uploadId, partNumber, content, nil, c.BosContext)
@@ -1342,15 +1426,16 @@ func (c *Client) BasicUploadPart(bucket, object, uploadId string, partNumber int
 // UploadPartFromBytes - upload the single part in the multipart upload process
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - object: the object name
-//     - uploadId: the multipart upload id
-//     - partNumber: the current part number
-//     - content: the uploaded part content
-//     - args: the optional arguments
+//   - bucket: the bucket name
+//   - object: the object name
+//   - uploadId: the multipart upload id
+//   - partNumber: the current part number
+//   - content: the uploaded part content
+//   - args: the optional arguments
+//
 // RETURNS:
-//     - string: the etag of the uploaded part
-//     - error: nil if ok otherwise the specific error
+//   - string: the etag of the uploaded part
+//   - error: nil if ok otherwise the specific error
 func (c *Client) UploadPartFromBytes(bucket, object, uploadId string, partNumber int,
 	content []byte, args *api.UploadPartArgs) (string, error) {
 	return api.UploadPartFromBytes(c, bucket, object, uploadId, partNumber, content, args, c.BosContext)
@@ -1359,16 +1444,17 @@ func (c *Client) UploadPartFromBytes(bucket, object, uploadId string, partNumber
 // UploadPartCopy - copy the multipart object
 //
 // PARAMS:
-//     - bucket: the destination bucket name
-//     - object: the destination object name
-//     - srcBucket: the source bucket
-//     - srcObject: the source object
-//     - uploadId: the multipart upload id
-//     - partNumber: the current part number
-//     - args: the optional arguments
+//   - bucket: the destination bucket name
+//   - object: the destination object name
+//   - srcBucket: the source bucket
+//   - srcObject: the source object
+//   - uploadId: the multipart upload id
+//   - partNumber: the current part number
+//   - args: the optional arguments
+//
 // RETURNS:
-//     - *CopyObjectResult: the lastModified and eTag of the part
-//     - error: nil if ok otherwise the specific error
+//   - *CopyObjectResult: the lastModified and eTag of the part
+//   - error: nil if ok otherwise the specific error
 func (c *Client) UploadPartCopy(bucket, object, srcBucket, srcObject, uploadId string,
 	partNumber int, args *api.UploadPartCopyArgs) (*api.CopyObjectResult, error) {
 	source := fmt.Sprintf("/%s/%s", srcBucket, srcObject)
@@ -1378,15 +1464,16 @@ func (c *Client) UploadPartCopy(bucket, object, srcBucket, srcObject, uploadId s
 // BasicUploadPartCopy - basic interface to copy the multipart object
 //
 // PARAMS:
-//     - bucket: the destination bucket name
-//     - object: the destination object name
-//     - srcBucket: the source bucket
-//     - srcObject: the source object
-//     - uploadId: the multipart upload id
-//     - partNumber: the current part number
+//   - bucket: the destination bucket name
+//   - object: the destination object name
+//   - srcBucket: the source bucket
+//   - srcObject: the source object
+//   - uploadId: the multipart upload id
+//   - partNumber: the current part number
+//
 // RETURNS:
-//     - *CopyObjectResult: the lastModified and eTag of the part
-//     - error: nil if ok otherwise the specific error
+//   - *CopyObjectResult: the lastModified and eTag of the part
+//   - error: nil if ok otherwise the specific error
 func (c *Client) BasicUploadPartCopy(bucket, object, srcBucket, srcObject, uploadId string,
 	partNumber int) (*api.CopyObjectResult, error) {
 	source := fmt.Sprintf("/%s/%s", srcBucket, srcObject)
@@ -1396,14 +1483,15 @@ func (c *Client) BasicUploadPartCopy(bucket, object, srcBucket, srcObject, uploa
 // CompleteMultipartUpload - finish a multipart upload operation with parts stream
 //
 // PARAMS:
-//     - bucket: the destination bucket name
-//     - object: the destination object name
-//     - uploadId: the multipart upload id
-//     - parts: all parts info stream
-//     - meta: user defined meta data
+//   - bucket: the destination bucket name
+//   - object: the destination object name
+//   - uploadId: the multipart upload id
+//   - parts: all parts info stream
+//   - meta: user defined meta data
+//
 // RETURNS:
-//     - *CompleteMultipartUploadResult: the result data
-//     - error: nil if ok otherwise the specific error
+//   - *CompleteMultipartUploadResult: the result data
+//   - error: nil if ok otherwise the specific error
 func (c *Client) CompleteMultipartUpload(bucket, object, uploadId string,
 	body *bce.Body, args *api.CompleteMultipartUploadArgs) (*api.CompleteMultipartUploadResult, error) {
 	return api.CompleteMultipartUpload(c, bucket, object, uploadId, body, args, c.BosContext)
@@ -1412,13 +1500,14 @@ func (c *Client) CompleteMultipartUpload(bucket, object, uploadId string,
 // CompleteMultipartUploadFromStruct - finish a multipart upload operation with parts struct
 //
 // PARAMS:
-//     - bucket: the destination bucket name
-//     - object: the destination object name
-//     - uploadId: the multipart upload id
-//     - args: args info struct object
+//   - bucket: the destination bucket name
+//   - object: the destination object name
+//   - uploadId: the multipart upload id
+//   - args: args info struct object
+//
 // RETURNS:
-//     - *CompleteMultipartUploadResult: the result data
-//     - error: nil if ok otherwise the specific error
+//   - *CompleteMultipartUploadResult: the result data
+//   - error: nil if ok otherwise the specific error
 func (c *Client) CompleteMultipartUploadFromStruct(bucket, object, uploadId string,
 	args *api.CompleteMultipartUploadArgs) (*api.CompleteMultipartUploadResult, error) {
 	jsonBytes, jsonErr := json.Marshal(args)
@@ -1435,11 +1524,12 @@ func (c *Client) CompleteMultipartUploadFromStruct(bucket, object, uploadId stri
 // AbortMultipartUpload - abort a multipart upload operation
 //
 // PARAMS:
-//     - bucket: the destination bucket name
-//     - object: the destination object name
-//     - uploadId: the multipart upload id
+//   - bucket: the destination bucket name
+//   - object: the destination object name
+//   - uploadId: the multipart upload id
+//
 // RETURNS:
-//     - error: nil if ok otherwise the specific error
+//   - error: nil if ok otherwise the specific error
 func (c *Client) AbortMultipartUpload(bucket, object, uploadId string) error {
 	return api.AbortMultipartUpload(c, bucket, object, uploadId, c.BosContext)
 }
@@ -1447,13 +1537,14 @@ func (c *Client) AbortMultipartUpload(bucket, object, uploadId string) error {
 // ListParts - list the successfully uploaded parts info by upload id
 //
 // PARAMS:
-//     - bucket: the destination bucket name
-//     - object: the destination object name
-//     - uploadId: the multipart upload id
-//     - args: the optional arguments
+//   - bucket: the destination bucket name
+//   - object: the destination object name
+//   - uploadId: the multipart upload id
+//   - args: the optional arguments
+//
 // RETURNS:
-//     - *ListPartsResult: the uploaded parts info result
-//     - error: nil if ok otherwise the specific error
+//   - *ListPartsResult: the uploaded parts info result
+//   - error: nil if ok otherwise the specific error
 func (c *Client) ListParts(bucket, object, uploadId string,
 	args *api.ListPartsArgs) (*api.ListPartsResult, error) {
 	return api.ListParts(c, bucket, object, uploadId, args, c.BosContext)
@@ -1462,12 +1553,13 @@ func (c *Client) ListParts(bucket, object, uploadId string,
 // BasicListParts - basic interface to list the successfully uploaded parts info by upload id
 //
 // PARAMS:
-//     - bucket: the destination bucket name
-//     - object: the destination object name
-//     - uploadId: the multipart upload id
+//   - bucket: the destination bucket name
+//   - object: the destination object name
+//   - uploadId: the multipart upload id
+//
 // RETURNS:
-//     - *ListPartsResult: the uploaded parts info result
-//     - error: nil if ok otherwise the specific error
+//   - *ListPartsResult: the uploaded parts info result
+//   - error: nil if ok otherwise the specific error
 func (c *Client) BasicListParts(bucket, object, uploadId string) (*api.ListPartsResult, error) {
 	return api.ListParts(c, bucket, object, uploadId, nil, c.BosContext)
 }
@@ -1475,11 +1567,12 @@ func (c *Client) BasicListParts(bucket, object, uploadId string) (*api.ListParts
 // ListMultipartUploads - list the unfinished uploaded parts of the given bucket
 //
 // PARAMS:
-//     - bucket: the destination bucket name
-//     - args: the optional arguments
+//   - bucket: the destination bucket name
+//   - args: the optional arguments
+//
 // RETURNS:
-//     - *ListMultipartUploadsResult: the unfinished uploaded parts info result
-//     - error: nil if ok otherwise the specific error
+//   - *ListMultipartUploadsResult: the unfinished uploaded parts info result
+//   - error: nil if ok otherwise the specific error
 func (c *Client) ListMultipartUploads(bucket string,
 	args *api.ListMultipartUploadsArgs) (*api.ListMultipartUploadsResult, error) {
 	return api.ListMultipartUploads(c, bucket, args, c.BosContext)
@@ -1488,10 +1581,11 @@ func (c *Client) ListMultipartUploads(bucket string,
 // BasicListMultipartUploads - basic interface to list the unfinished uploaded parts
 //
 // PARAMS:
-//     - bucket: the destination bucket name
+//   - bucket: the destination bucket name
+//
 // RETURNS:
-//     - *ListMultipartUploadsResult: the unfinished uploaded parts info result
-//     - error: nil if ok otherwise the specific error
+//   - *ListMultipartUploadsResult: the unfinished uploaded parts info result
+//   - error: nil if ok otherwise the specific error
 func (c *Client) BasicListMultipartUploads(bucket string) (
 	*api.ListMultipartUploadsResult, error) {
 	return api.ListMultipartUploads(c, bucket, nil, c.BosContext)
@@ -1500,12 +1594,13 @@ func (c *Client) BasicListMultipartUploads(bucket string) (
 // UploadSuperFile - parallel upload the super file by using the multipart upload interface
 //
 // PARAMS:
-//     - bucket: the destination bucket name
-//     - object: the destination object name
-//     - fileName: the local full path filename of the super file
-//     - storageClass: the storage class to be set to the uploaded file
+//   - bucket: the destination bucket name
+//   - object: the destination object name
+//   - fileName: the local full path filename of the super file
+//   - storageClass: the storage class to be set to the uploaded file
+//
 // RETURNS:
-//     - error: nil if ok otherwise the specific error
+//   - error: nil if ok otherwise the specific error
 func (c *Client) UploadSuperFile(bucket, object, fileName, storageClass string) error {
 	// Get the file size and check the size for multipart upload
 	file, fileErr := os.Open(fileName)
@@ -1605,11 +1700,12 @@ func (c *Client) UploadSuperFile(bucket, object, fileName, storageClass string)
 // DownloadSuperFile - parallel download the super file using the get object with range
 //
 // PARAMS:
-//     - bucket: the destination bucket name
-//     - object: the destination object name
-//     - fileName: the local full path filename to store the object
+//   - bucket: the destination bucket name
+//   - object: the destination object name
+//   - fileName: the local full path filename to store the object
+//
 // RETURNS:
-//     - error: nil if ok otherwise the specific error
+//   - error: nil if ok otherwise the specific error
 func (c *Client) DownloadSuperFile(bucket, object, fileName string) (err error) {
 	file, err := os.OpenFile(fileName, os.O_WRONLY|os.O_TRUNC|os.O_CREATE, 0644)
 	if err != nil {
@@ -1700,14 +1796,15 @@ func (c *Client) DownloadSuperFile(bucket, object, fileName string) (err error)
 // GeneratePresignedUrl - generate an authorization url with expire time and optional arguments
 //
 // PARAMS:
-//     - bucket: the target bucket name
-//     - object: the target object name
-//     - expireInSeconds: the expire time in seconds of the signed url
-//     - method: optional sign method, default is GET
-//     - headers: optional sign headers, default just set the Host
-//     - params: optional sign params, default is empty
+//   - bucket: the target bucket name
+//   - object: the target object name
+//   - expireInSeconds: the expire time in seconds of the signed url
+//   - method: optional sign method, default is GET
+//   - headers: optional sign headers, default just set the Host
+//   - params: optional sign params, default is empty
+//
 // RETURNS:
-//     - string: the presigned url with authorization string
+//   - string: the presigned url with authorization string
 func (c *Client) GeneratePresignedUrl(bucket, object string, expireInSeconds int, method string,
 	headers, params map[string]string) string {
 	return api.GeneratePresignedUrl(c.Config, c.Signer, bucket, object,
@@ -1723,11 +1820,12 @@ func (c *Client) GeneratePresignedUrlPathStyle(bucket, object string, expireInSe
 // BasicGeneratePresignedUrl - basic interface to generate an authorization url with expire time
 //
 // PARAMS:
-//     - bucket: the target bucket name
-//     - object: the target object name
-//     - expireInSeconds: the expire time in seconds of the signed url
+//   - bucket: the target bucket name
+//   - object: the target object name
+//   - expireInSeconds: the expire time in seconds of the signed url
+//
 // RETURNS:
-//     - string: the presigned url with authorization string
+//   - string: the presigned url with authorization string
 func (c *Client) BasicGeneratePresignedUrl(bucket, object string, expireInSeconds int) string {
 	return api.GeneratePresignedUrl(c.Config, c.Signer, bucket, object,
 		expireInSeconds, "", nil, nil)
@@ -1736,11 +1834,12 @@ func (c *Client) BasicGeneratePresignedUrl(bucket, object string, expireInSecond
 // PutObjectAcl - set the ACL of the given object
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - object: the object name
-//     - aclBody: the acl json body stream
+//   - bucket: the bucket name
+//   - object: the object name
+//   - aclBody: the acl json body stream
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutObjectAcl(bucket, object string, aclBody *bce.Body) error {
 	return api.PutObjectAcl(c, bucket, object, "", nil, nil, aclBody, c.BosContext)
 }
@@ -1748,11 +1847,12 @@ func (c *Client) PutObjectAcl(bucket, object string, aclBody *bce.Body) error {
 // PutObjectAclFromCanned - set the canned acl of the given object
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - object: the object name
-//     - cannedAcl: the cannedAcl string
+//   - bucket: the bucket name
+//   - object: the object name
+//   - cannedAcl: the cannedAcl string
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutObjectAclFromCanned(bucket, object, cannedAcl string) error {
 	return api.PutObjectAcl(c, bucket, object, cannedAcl, nil, nil, nil, c.BosContext)
 }
@@ -1760,11 +1860,12 @@ func (c *Client) PutObjectAclFromCanned(bucket, object, cannedAcl string) error
 // PutObjectAclGrantRead - set the canned grant read acl of the given object
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - object: the object name
-//     - ids: the user id list to grant read for this object
+//   - bucket: the bucket name
+//   - object: the object name
+//   - ids: the user id list to grant read for this object
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutObjectAclGrantRead(bucket, object string, ids ...string) error {
 	return api.PutObjectAcl(c, bucket, object, "", ids, nil, nil, c.BosContext)
 }
@@ -1772,11 +1873,12 @@ func (c *Client) PutObjectAclGrantRead(bucket, object string, ids ...string) err
 // PutObjectAclGrantFullControl - set the canned grant full-control acl of the given object
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - object: the object name
-//     - ids: the user id list to grant full-control for this object
+//   - bucket: the bucket name
+//   - object: the object name
+//   - ids: the user id list to grant full-control for this object
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutObjectAclGrantFullControl(bucket, object string, ids ...string) error {
 	return api.PutObjectAcl(c, bucket, object, "", nil, ids, nil, c.BosContext)
 }
@@ -1784,11 +1886,12 @@ func (c *Client) PutObjectAclGrantFullControl(bucket, object string, ids ...stri
 // PutObjectAclFromFile - set the acl of the given object with acl json file name
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - object: the object name
-//     - aclFile: the acl file name
+//   - bucket: the bucket name
+//   - object: the object name
+//   - aclFile: the acl file name
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutObjectAclFromFile(bucket, object, aclFile string) error {
 	body, err := bce.NewBodyFromFile(aclFile)
 	if err != nil {
@@ -1800,11 +1903,12 @@ func (c *Client) PutObjectAclFromFile(bucket, object, aclFile string) error {
 // PutObjectAclFromString - set the acl of the given object with acl json string
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - object: the object name
-//     - aclString: the acl string with json format
+//   - bucket: the bucket name
+//   - object: the object name
+//   - aclString: the acl string with json format
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutObjectAclFromString(bucket, object, aclString string) error {
 	body, err := bce.NewBodyFromString(aclString)
 	if err != nil {
@@ -1816,10 +1920,11 @@ func (c *Client) PutObjectAclFromString(bucket, object, aclString string) error
 // PutObjectAclFromStruct - set the acl of the given object with acl data structure
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - aclObj: the acl struct object
+//   - bucket: the bucket name
+//   - aclObj: the acl struct object
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutObjectAclFromStruct(bucket, object string, aclObj *api.PutObjectAclArgs) error {
 	jsonBytes, jsonErr := json.Marshal(aclObj)
 	if jsonErr != nil {
@@ -1835,11 +1940,12 @@ func (c *Client) PutObjectAclFromStruct(bucket, object string, aclObj *api.PutOb
 // GetObjectAcl - get the acl of the given object
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - object: the object name
+//   - bucket: the bucket name
+//   - object: the object name
+//
 // RETURNS:
-//     - *api.GetObjectAclResult: the result of the object acl
-//     - error: nil if success otherwise the specific error
+//   - *api.GetObjectAclResult: the result of the object acl
+//   - error: nil if success otherwise the specific error
 func (c *Client) GetObjectAcl(bucket, object string) (*api.GetObjectAclResult, error) {
 	return api.GetObjectAcl(c, bucket, object, c.BosContext)
 }
@@ -1847,10 +1953,11 @@ func (c *Client) GetObjectAcl(bucket, object string) (*api.GetObjectAclResult, e
 // DeleteObjectAcl - delete the acl of the given object
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - object: the object name
+//   - bucket: the bucket name
+//   - object: the object name
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) DeleteObjectAcl(bucket, object string) error {
 	return api.DeleteObjectAcl(c, bucket, object, c.BosContext)
 }
@@ -1858,12 +1965,13 @@ func (c *Client) DeleteObjectAcl(bucket, object string) error {
 // RestoreObject - restore the archive object
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - object: the object name
-//     - restoreDays: the effective time of restore
-//     - restoreTier: the tier of restore
+//   - bucket: the bucket name
+//   - object: the object name
+//   - restoreDays: the effective time of restore
+//   - restoreTier: the tier of restore
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) RestoreObject(bucket string, object string, restoreDays int, restoreTier string) error {
 	if _, ok := api.VALID_RESTORE_TIER[restoreTier]; !ok {
 		return errors.New("invalid restore tier")
@@ -1883,10 +1991,11 @@ func (c *Client) RestoreObject(bucket string, object string, restoreDays int, re
 // PutBucketTrash - put the bucket trash
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - trashReq: the trash request
+//   - bucket: the bucket name
+//   - trashReq: the trash request
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutBucketTrash(bucket string, trashReq api.PutBucketTrashReq) error {
 	return api.PutBucketTrash(c, bucket, trashReq, c.BosContext)
 }
@@ -1894,10 +2003,11 @@ func (c *Client) PutBucketTrash(bucket string, trashReq api.PutBucketTrashReq) e
 // GetBucketTrash - get the bucket trash
 //
 // PARAMS:
-//     - bucket: the bucket name
+//   - bucket: the bucket name
+//
 // RETURNS:
-//     - *api.GetBucketTrashResult,: the result of the bucket trash
-//     - error: nil if success otherwise the specific error
+//   - *api.GetBucketTrashResult,: the result of the bucket trash
+//   - error: nil if success otherwise the specific error
 func (c *Client) GetBucketTrash(bucket string) (*api.GetBucketTrashResult, error) {
 	return api.GetBucketTrash(c, bucket, c.BosContext)
 }
@@ -1905,9 +2015,10 @@ func (c *Client) GetBucketTrash(bucket string) (*api.GetBucketTrashResult, error
 // DeleteBucketTrash - delete the trash of the given bucket
 //
 // PARAMS:
-//     - bucket: the bucket name
+//   - bucket: the bucket name
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) DeleteBucketTrash(bucket string) error {
 	return api.DeleteBucketTrash(c, bucket, c.BosContext)
 }
@@ -1915,10 +2026,11 @@ func (c *Client) DeleteBucketTrash(bucket string) error {
 // PutBucketNotification - put the bucket notification
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - putBucketNotificationReq: the bucket notification request
+//   - bucket: the bucket name
+//   - putBucketNotificationReq: the bucket notification request
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) PutBucketNotification(bucket string, putBucketNotificationReq api.PutBucketNotificationReq) error {
 	return api.PutBucketNotification(c, bucket, putBucketNotificationReq, c.BosContext)
 }
@@ -1926,10 +2038,11 @@ func (c *Client) PutBucketNotification(bucket string, putBucketNotificationReq a
 // GetBucketNotification - get the bucket notification
 //
 // PARAMS:
-//     - bucket: the bucket name
+//   - bucket: the bucket name
+//
 // RETURNS:
-//     - *api.PutBucketNotificationReq,: the result of the bucket notification
-//     - error: nil if success otherwise the specific error
+//   - *api.PutBucketNotificationReq,: the result of the bucket notification
+//   - error: nil if success otherwise the specific error
 func (c *Client) GetBucketNotification(bucket string) (*api.PutBucketNotificationReq, error) {
 	return api.GetBucketNotification(c, bucket, c.BosContext)
 }
@@ -1937,9 +2050,10 @@ func (c *Client) GetBucketNotification(bucket string) (*api.PutBucketNotificatio
 // DeleteBucketNotification - delete the notification of the given bucket
 //
 // PARAMS:
-//     - bucket: the bucket name
+//   - bucket: the bucket name
+//
 // RETURNS:
-//     - error: nil if success otherwise the specific error
+//   - error: nil if success otherwise the specific error
 func (c *Client) DeleteBucketNotification(bucket string) error {
 	return api.DeleteBucketNotification(c, bucket, c.BosContext)
 }
@@ -1947,14 +2061,15 @@ func (c *Client) DeleteBucketNotification(bucket string) error {
 // ParallelUpload - auto multipart upload object
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - object: the object name
-//     - filename: the filename
-//     - contentType: the content type default(application/octet-stream)
-//     - args: the bucket name nil using default
+//   - bucket: the bucket name
+//   - object: the object name
+//   - filename: the filename
+//   - contentType: the content type default(application/octet-stream)
+//   - args: the bucket name nil using default
+//
 // RETURNS:
-//     - *api.CompleteMultipartUploadResult: multipart upload result
-//     - error: nil if success otherwise the specific error
+//   - *api.CompleteMultipartUploadResult: multipart upload result
+//   - error: nil if success otherwise the specific error
 func (c *Client) ParallelUpload(bucket string, object string, filename string, contentType string, args *api.InitiateMultipartUploadArgs) (*api.CompleteMultipartUploadResult, error) {
 
 	initiateMultipartUploadResult, err := api.InitiateMultipartUpload(c, bucket, object, contentType, args, c.BosContext)
@@ -1979,13 +2094,14 @@ func (c *Client) ParallelUpload(bucket string, object string, filename string, c
 // parallelPartUpload - single part upload
 //
 // PARAMS:
-//     - bucket: the bucket name
-//     - object: the object name
-//     - filename: the uploadId
-//     - uploadId: the uploadId
+//   - bucket: the bucket name
+//   - object: the object name
+//   - filename: the uploadId
+//   - uploadId: the uploadId
+//
 // RETURNS:
-//     - []api.UploadInfoType: multipart upload result
-//     - error: nil if success otherwise the specific error
+//   - []api.UploadInfoType: multipart upload result
+//   - error: nil if success otherwise the specific error
 func (c *Client) parallelPartUpload(bucket string, object string, filename string, uploadId string) ([]api.UploadInfoType, error) {
 	file, err := os.Open(filename)
 	if err != nil {
@@ -2055,14 +2171,14 @@ func (c *Client) parallelPartUpload(bucket string, object string, filename strin
 // singlePartUpload - single part upload
 //
 // PARAMS:
-//     - pararelChan: the pararelChan
-//     - errChan: the error chan
-//     - result: the upload result chan
-//     - bucket: the bucket name
-//     - object: the object name
-//     - uploadId: the uploadId
-//     - partNumber: the part number of the object
-//     - content: the content of current part
+//   - pararelChan: the pararelChan
+//   - errChan: the error chan
+//   - result: the upload result chan
+//   - bucket: the bucket name
+//   - object: the object name
+//   - uploadId: the uploadId
+//   - partNumber: the part number of the object
+//   - content: the content of current part
 func (c *Client) singlePartUpload(
 	bucket string, object string, uploadId string,
 	partNumber int, content *bce.Body,
@@ -2092,15 +2208,16 @@ func (c *Client) singlePartUpload(
 // ParallelCopy - auto multipart copy object
 //
 // PARAMS:
-//     - srcBucketName: the src bucket name
-//     - srcObjectName: the src object name
-//     - destBucketName: the dest bucket name
-//     - destObjectName: the dest object name
-//     - args: the copy args
-//     - srcClient: the src region client
+//   - srcBucketName: the src bucket name
+//   - srcObjectName: the src object name
+//   - destBucketName: the dest bucket name
+//   - destObjectName: the dest object name
+//   - args: the copy args
+//   - srcClient: the src region client
+//
 // RETURNS:
-//     - *api.CompleteMultipartUploadResult: multipart upload result
-//     - error: nil if success otherwise the specific error
+//   - *api.CompleteMultipartUploadResult: multipart upload result
+//   - error: nil if success otherwise the specific error
 func (c *Client) ParallelCopy(srcBucketName string, srcObjectName string,
 	destBucketName string, destObjectName string,
 	args *api.MultiCopyObjectArgs, srcClient *Client) (*api.CompleteMultipartUploadResult, error) {
@@ -2149,14 +2266,15 @@ func (c *Client) ParallelCopy(srcBucketName string, srcObjectName string,
 // parallelPartCopy - parallel part copy
 //
 // PARAMS:
-//     - srcMeta: the copy source object meta
-//     - source: the copy source
-//     - bucket: the dest bucket name
-//     - object: the dest object name
-//     - uploadId: the uploadId
+//   - srcMeta: the copy source object meta
+//   - source: the copy source
+//   - bucket: the dest bucket name
+//   - object: the dest object name
+//   - uploadId: the uploadId
+//
 // RETURNS:
-//     - []api.UploadInfoType: multipart upload result
-//     - error: nil if success otherwise the specific error
+//   - []api.UploadInfoType: multipart upload result
+//   - error: nil if success otherwise the specific error
 func (c *Client) parallelPartCopy(srcMeta api.GetObjectMetaResult, source string, bucket string, object string, uploadId string) ([]api.UploadInfoType, error) {
 	var err error
 	size := srcMeta.ContentLength
@@ -2217,15 +2335,15 @@ func (c *Client) parallelPartCopy(srcMeta api.GetObjectMetaResult, source string
 // singlePartCopy - single part copy
 //
 // PARAMS:
-//     - pararelChan: the pararelChan
-//     - errChan: the error chan
-//     - result: the upload result chan
-//     - source: the copy source
-//     - bucket: the bucket name
-//     - object: the object name
-//     - uploadId: the uploadId
-//     - partNumber: the part number of the object
-//     - args: the copy args
+//   - pararelChan: the pararelChan
+//   - errChan: the error chan
+//   - result: the upload result chan
+//   - source: the copy source
+//   - bucket: the bucket name
+//   - object: the object name
+//   - uploadId: the uploadId
+//   - partNumber: the part number of the object
+//   - args: the copy args
 func (c *Client) singlePartCopy(source string, bucket string, object string, uploadId string,
 	partNumber int, args *api.UploadPartCopyArgs,
 	parallelChan chan int, errChan chan error, result chan api.UploadInfoType) {
@@ -2251,12 +2369,13 @@ func (c *Client) singlePartCopy(source string, bucket string, object string, upl
 // PutSymlink - create symlink for exist target object
 //
 // PARAMS:
-//     - bucket: the name of the bucket
-//     - object: the name of the object
-//     - symlinkKey: the name of the symlink
-//     - symlinkArgs: the optional arguments
+//   - bucket: the name of the bucket
+//   - object: the name of the object
+//   - symlinkKey: the name of the symlink
+//   - symlinkArgs: the optional arguments
+//
 // RETURNS:
-//     - error: the put error if any occurs
+//   - error: the put error if any occurs
 func (c *Client) PutSymlink(bucket string, object string, symlinkKey string, symlinkArgs *api.PutSymlinkArgs) error {
 	return api.PutObjectSymlink(c, bucket, object, symlinkKey, symlinkArgs, c.BosContext)
 }
@@ -2264,11 +2383,12 @@ func (c *Client) PutSymlink(bucket string, object string, symlinkKey string, sym
 // PutSymlink - create symlink for exist target object
 //
 // PARAMS:
-//     - bucket: the name of the bucket
-//     - object: the name of the symlink
+//   - bucket: the name of the bucket
+//   - object: the name of the symlink
+//
 // RETURNS:
-//	   - string: the target of the symlink
-//     - error: the put error if any occurs
+//   - string: the target of the symlink
+//   - error: the put error if any occurs
 func (c *Client) GetSymlink(bucket string, object string) (string, error) {
 	return api.GetObjectSymlink(c, bucket, object, c.BosContext)
 }