/download/files

URL: http://<db.host>:<db.port>/download/files

Downloads one or more files from KiFS.

Input Parameter Description

Name

Type

Description

file_names

array of strings

An array of the file names to download from KiFS. File paths may contain wildcard characters after the KiFS directory delimeter. Accepted wildcard characters are asterisk (*) to represent any string of zero or more characters, and question mark (?) to indicate a single character.

read_offsets

array of longs

An array of starting byte offsets from which to read each respective file in input parameter file_names. Must either be empty or the same length as input parameter file_names. If empty, files are downloaded in their entirety. If not empty, input parameter read_lengths must also not be empty.

read_lengths

array of longs

Array of number of bytes to read from each respective file in input parameter file_names. Must either be empty or the same length as input parameter file_names. If empty, files are downloaded in their entirety. If not empty, input parameter read_offsets must also not be empty.

options

map of string to strings

Optional parameters. The default value is an empty map ( {} ).

Supported Parameters (keys)

Parameter Description

file_encoding

Encoding to be applied to the output file data. When using JSON serialization it is recommended to specify this as base64. The default value is none.

Supported Values	Description
base64	Apply base64 encoding to the output file data.
none	Do not apply any encoding to the output file data.

Output Parameter Description

The GPUdb server embeds the endpoint response inside a standard response structure which contains status information and the actual response to the query. Here is a description of the various fields of the wrapper:

Name

Type

Description

status

String

'OK' or 'ERROR'

message

String

Empty if success or an error message

data_type

String

'download_files_response' or 'none' in case of an error

data

String

Empty string

data_str

JSON or String

This embedded JSON represents the result of the /download/files endpoint:

Name	Type	Description
file_names	array of strings	Names of the files downloaded from KiFS
file_data	array of bytes	Data for the respective downloaded files listed in output parameter file_names
info	map of string to strings	Additional information.

Empty string in case of an error.