config

type S3Cli struct {
	AccessKeyID                               string `json:"access_key_id"`
	SecretAccessKey                           string `json:"secret_access_key"`
	BucketName                                string `json:"bucket_name"`
	FolderName                                string `json:"folder_name"`
	CredentialsSource                         string `json:"credentials_source"`
	Host                                      string `json:"host"`
	Port                                      int    `json:"port"` // 0 means no custom port
	Region                                    string `json:"region"`
	SSLVerifyPeer                             bool   `json:"ssl_verify_peer"`
	UseSSL                                    bool   `json:"use_ssl"`
	ServerSideEncryption                      string `json:"server_side_encryption"`
	SSEKMSKeyID                               string `json:"sse_kms_key_id"`
	AssumeRoleArn                             string `json:"assume_role_arn"`
	HostStyle                                 bool   `json:"host_style"`
	SwiftAuthAccount                          string `json:"swift_auth_account"`
	SwiftTempURLKey                           string `json:"swift_temp_url_key"`
	RequestChecksumCalculationEnabled         bool
	ResponseChecksumCalculationEnabled        bool
	UploaderRequestChecksumCalculationEnabled bool
	// Optional knobs to tune transfer performance.
	// If zero, the client will apply sensible defaults (handled by the S3 client layer).
	// Part size values are provided in bytes.
	DownloadConcurrency    int   `json:"download_concurrency"`
	DownloadPartSize       int64 `json:"download_part_size"`
	UploadConcurrency      int   `json:"upload_concurrency"`
	UploadPartSize         int64 `json:"upload_part_size"`
	MultipartCopyThreshold int64 `json:"multipart_copy_threshold"` // Default: 5GB - files larger than this use multipart copy
	MultipartCopyPartSize  int64 `json:"multipart_copy_part_size"` // Default: 100MB - size of each part in multipart copy

	// Files smaller than or equal to this size (in bytes) are uploaded using a single PutObject call.
	// Files exceeding this size use multipart upload. Omit or set to 0 to always use multipart upload.
	// Must not exceed 5GB (AWS S3 hard limit for PutObject, https://docs.aws.amazon.com/AmazonS3/latest/userguide/upload-objects.html).
	// For GCS, leave this unset (0); it will be automatically set to math.MaxInt64 since GCS requires single put for all uploads but has no size limit.
	SingleUploadThreshold int64 `json:"single_upload_threshold"`
}