Queries information about all files that are uploaded to IoT Platform from a device.

Limits

  • The returned file information for this operation call does not contain download URLs. To obtain the download URL of a file, call QueryDeviceFile.
  • Each Alibaba Cloud account can run a maximum of 500 queries per second (QPS).
    Note RAM users of an Alibaba Cloud account share the quota of the account.

Debugging

Alibaba Cloud provides OpenAPI Explorer to simplify API usage. OpenAPI Explorer automatically calculates the signature value. For your convenience, we recommend that you call this operation in OpenAPI Explorer. OpenAPI Explorer dynamically generates the sample code of the operation for different SDKs.

Request parameters

Parameter Type Required Example Description
Action String Yes QueryDeviceFileList

The operation that you want to perform. Set the value to QueryDeviceFileList.

IotInstanceId String No iot_instc_pu****_c*-v64********

The ID of the instance. You can view the instance ID on the Overview page in the IoT Platform console.

Notice
  • If your instance has an ID, you must configure this parameter. If you do not set this parameter, the call fails.
  • If your instance has no Overview page or ID, you do not need to set this parameter.

For more information, see Overview.

PageSize Integer No 10

The number of entries to return on each page. Maximum value: 200. Default value: 10.

ProductKey String No a1BwAGV****

The ProductKey of the product to which the device belongs.

Note If you specify this parameter, you must also specify the DeviceName parameter.
DeviceName String No light

The DeviceName of the device.

Note If you specify this parameter, you must also specify the ProductKey parameter.
IotId String No Q7uOhVRdZRRlDnTLv****00100

The ID of the device. The device ID is issued by IoT Platform.

Note If you specify this parameter, you do not need to specify ProductKey or DeviceName. The IotId parameter specifies a globally unique identifier (GUID) of the device, which corresponds to a combination of ProductKey and DeviceName. If you specify both IotId and the combination of ProductKey and DeviceName, IotId takes precedence.
CurrentPage Integer No 1

The number of the page to return. Pages start from page 1. Default value: 1.

In addition to the preceding operation-specific request parameters, you must specify common request parameters when you call this operation. For more information, see Common request parameters.

Response parameters

Parameter Type Example Description
Code String iot.system.SystemException

The error code returned if the call fails. For more information, see Error codes.

CurrentPage Integer 1

The number of the returned page.

Data Array of FileSummary

The file list information returned if the call succeeds.

FileSummary
FileId String xL0G67MBLBDtkR7GCfT******

The ID of each file. The ID is the unique identifier for the file.

Name String testFile2.txt

The name of the file.

Size String 1024000

The size of the file. Unit: KB.

UtcCreatedOn String 2019-03-21T08:45:42.000Z

The time when the file was created.

ErrorMessage String A system exception occurred.

The error message returned if the call fails.

PageCount Integer 1

The total number of pages.

PageSize Integer 10

The number of entries returned per page.

RequestId String E55E50B7-40EE-4B6B-8BBE-D3ED55CCF565

The ID of the request.

Success Boolean true

Indicates whether the call was successful.

  • true: The call was successful.
  • false: The call failed.
Total Integer 2

The total number of files.

Examples

Sample requests

https://iot.cn-shanghai.aliyuncs.com/?Action=QueryDeviceFileList
&ProductKey=a1BwAGV****
&DeviceName=deviceName1
&PageSize=10
&CurrentPage=1
&<Common request parameters>

Sample success responses

XML format 

<QueryDeviceFileListResponse>
  <PageCount>1</PageCount>
  <Data>
        <FileStoreSummary>
              <Name>testFile2.txt</Name>
              <FileId>xL0G67MBLBDtkR7GCfT******</FileId>
              <UtcCreatedOn>2019-03-21T08:45:42.000Z</UtcCreatedOn>
              <Size>102400</Size>
        </FileStoreSummary>
        <FileStoreSummary>
              <Name>testFile3.txt</Name>
              <FileId>6UCo1SqbqnQEoh9aKqD******</FileId>
              <UtcCreatedOn>2019-03-21T08:45:42.000Z</UtcCreatedOn>
              <Size>102400</Size>
        </FileStoreSummary>
        <FileStoreSummary>
              <Name>testFile1.txt</Name>
              <FileId>IhXXww3Eeu6uzSOSCyu******</FileId>
              <UtcCreatedOn>2019-03-21T08:45:40.000Z</UtcCreatedOn>
              <Size>102400</Size>
        </FileStoreSummary>
  </Data>
  <PageSize>10</PageSize>
  <RequestId>7C7BA526-826D-46AA-A45E-55D21E6D1583</RequestId>
  <CurrentPage>1</CurrentPage>
  <Success>true</Success>
  <Total>3</Total>
</QueryDeviceFileListResponse>

JSON format 

{
  "PageCount": 1, 
  "Data": {
    "FileStoreSummary": [
      {
        "Name": "testFile2.txt", 
        "FileId": "xL0G67MBLBDtkR7GCfT******", 
        "UtcCreatedOn": "2019-03-21T08:45:42.000Z", 
        "Size": "102400"
      }, 
      {
        "Name": "testFile3.txt", 
        "FileId": "6UCo1SqbqnQEoh9aKqD******", 
        "UtcCreatedOn": "2019-03-21T08:45:42.000Z", 
        "Size": "102400"
      }, 
      {
        "Name": "testFile1.txt", 
        "FileId": "IhXXww3Eeu6uzSOSCyu******", 
        "UtcCreatedOn": "2019-03-21T08:45:40.000Z", 
        "Size": "102400"
      }
    ]
  }, 
  "PageSize": 10, 
  "RequestId": "7C7BA526-826D-46AA-A45E-55D21E6D1583", 
  "CurrentPage": 1, 
  "Success": true, 
  "Total": 3
}

Error codes

For a list of error codes, visit the API Error Center.