Help Center/ MapReduce Service/ API Reference/ API V2/ Cluster HDFS File API/ Obtaining the List of Files from a Specified Directory

Updated on 2024-12-10 GMT+08:00

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Obtaining the List of Files from a Specified Directory

Function

This API is used to obtain the list of files from a specified directory in an MRS cluster.

Constraints

None

Debugging

You can debug this API in API Explorer. Automatic authentication is supported. API Explorer can automatically generate sample SDK code and provide the sample SDK code debugging.

URI

GET /v2/{project_id}/clusters/{cluster_id}/files

**Table 1** URI parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Explanation Project ID. For details about how to obtain the project ID, see Obtaining a Project ID. Constraints N/A Value range The value must consist of 1 to 64 characters. Only letters and digits are allowed. Default value N/A
cluster_id	Yes	String	Explanation Cluster ID. If this parameter is specified, the latest metadata of the cluster that has been patched will be obtained. For details about how to obtain the cluster ID, see Obtaining a Cluster ID. Constraints N/A Value range The value can contain 1 to 64 characters, including only letters, digits, underscores (_), and hyphens (-). Default value N/A

**Table 2** Query parameters
Parameter	Mandatory	Type	Description
path	Yes	String	Explanation File category. For example, to access the /tmp/test directory, the value must be a directory. The URI is /v2/{project_id}/clusters/{cluster_id}/files?path=%2Ftmp %2Ftest. Constraints N/A Value range A single-level directory must comply with the following rules: The directory path cannot be left blank. The value cannot start or end with a period (.). The value cannot contain the following characters: /:?"<>\|\;&,'`!{}[]$%+ The value cannot exceed 255 characters. Default value* N/A
offset	No	String	Explanation Pagination parameter. The file list is queried from the offset. Constraints N/A Value range N/A Default value 1
limit	No	String	Explanation Maximum number of records displayed on a page. Constraints N/A Value range ≤1000 Default value 100
sort_key	No	String	Explanation Attribute used for sorting the list. Constraints N/A Value range path_suffix: file or directory name length: file size modification_time: modification time Default value path_suffix
order	No	String	Explanation List sorting method. Constraints N/A Value range desc: descending order asc: ascending order Default value desc

Request Parameters

None

Response Parameters

**Table 3** Response parameters
Parameter	Type	Description
total_count	Integer	Explanation The total number of files, which is irrelevant to pagination. Value range N/A Default value N/A
files	Array of FileStatusV2 objects	Explanation File list. For details, see Table 4. Constraints N/A Value range N/A Default value N/A

**Table 4** FileStatus parameters
Parameter	Type	Description
path_suffix	String	Explanation The file name extension in the current directory. For example, if you obtain the /tmp/test file in the /tmp directory, the value of path_suffix is test. Constraints N/A Value range N/A Default value N/A
owner	String	Explanation File owner. Constraints N/A Value range N/A Default value N/A
group	String	Explanation File owner group. Constraints N/A Value range N/A Default value N/A
permission	String	Explanation Permission information. Constraints N/A Value range N/A Default value N/A
replication	Integer	Explanation Number of replicas. Constraints N/A Value range N/A Default value N/A
block_size	Integer	Explanation Block size. Constraints N/A Value range N/A Default value N/A
length	Integer	Explanation File length. Constraints N/A Value range N/A Default value N/A
type	String	Explanation File type Constraints N/A Value range FILE: file DIRECTORY: directory Default value N/A
children_num	Integer	Explanation Number of files in the directory. Constraints N/A Value range N/A Default value N/A
access_time	Long	Explanation File access time. Constraints N/A Value range N/A Default value N/A
modification_time	Long	Explanation File modification time Constraints N/A Value range N/A Default value N/A

Example Request

Obtain the list of files from a specified directory.

GET /v2/{project_id}/clusters/{cluster_id}/files?path={directory}&offset={offset}&limit={limit}&sort_key={sort_key}&order={order}

Example Response

Status code: 200

Obtaining the file list of a specified directory is successful.

{
    "total_count": 2,
    "files": [
        {
            "access_time": 0,
            "block_size": 0,
            "children_num": 0,
            "group": "hadoop",
            "length": 0,
            "modification_time": 1587179516623,
            "owner": "hdfs",
            "path_suffix": "app-logs",
            "permission": "777",
            "replication": 0,
            "type": "DIRECTORY"
        },
        {
            "access_time": 1587267212761,
            "block_size": 134217728,
            "children_num": 0,
            "group": "hadoop",
            "length": 23666188,
            "modification_time": 1587222156003,
            "owner": "root",
            "path_suffix": "data-m-00000",
            "permission": "644",
            "replication": 3,
            "type": "FILE"
        }
    ]
}