CreateDownloadDataJob - IoT Platform - Alibaba Cloud Documentation Center

Creates a data download task.

Usage notes

After you call the CreateDownloadDataJob operation to create a download task, the task is displayed in the IoT Platform console. On the Exporting tab of the corresponding table, you can view the logs of the task and download the required file.
If you call the CreateDownloadDataJob operation to create a download task, a message that can be pushed over Advanced Message Queuing Protocol (AMQP) is generated. Set the consumerGroupId parameter of the message to dop_aliyun_group_name The content of the message includes the status of the download task. You can call the GetDownloadFile operation to obtain the download link of the corresponding file or view the error messages of the download task based on the status.

Limits

You can create only one download task for a data instance each time. You can create a download task only after the previous download task is complete. Otherwise, an error message indicating that the number of download tasks exceeds the limit appears.
You can download only data of the previous three days.
You can create up to three download tasks per day. The RAM users of an Alibaba Cloud account share the quota of the account.

Debugging

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	CreateDownloadDataJob	The operation that you want to perform. Set the value to CreateDownloadDataJob.
IotInstanceId	String	No	iot-cn-npk1u******	The ID of the instance. You can obtain the ID of the instance on the Overview page in the IoT Platform console. Important If your instance has an ID, you must configure this parameter. Otherwise, the call fails. If the Overview page or the instance ID is not displayed in the IoT Platform console, ignore this parameter. For more information about instances, see Overview.
TableName	String	Yes	product_info	The name of the table that you want to download.
DownloadDataType	String	Yes	TABLE	The type of the object that you want to download. Set the value to TABLE.
FileConfig	Map	No	{"fileName":"fileName01"}	The setting of the file. Specify a custom name for the fileName field. If you do not configure the fileName field, a file name is automatically generated.
StartTime	Long	No	1658332800000	The beginning of the time range to query.
EndTime	Long	No	1658406464534	The end of the time range to query.

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

Response parameters

Parameter	Type	Example	Description
Code	String	200	The error code returned if the call fails. For more information about error codes, see Error codes.
ErrorMessage	String	no authorization.	The error message returned if the call fails.
RequestId	String	4D6D7F71-1C94-4160-8511-EFF4B8F0643F	The ID of the request.
Success	Boolean	true	Indicates whether the call was successful. Valid values: true: The call was successful. false: The call failed.
Data	Object		The result that is returned.
Status	Integer	-1	The status of the task. Valid values: -1: The task is being initialized. 0: The task is running. 1: The task is executed. 2: The task failed to be executed. 3: The task is submitted and pending execution. 4: The task is canceled.
LongJobId	String	62d949808bc742187xxxxxx	The ID of the download task.
AsyncExecute	Boolean	true	Indicates whether the query is asynchronous. Valid values: true: The query is asynchronous. false: The query is synchronous.
CsvUrl	String	https://oss-xxxx-xxxx.xxxx......	The download link of the CSV file that is stored in an Object Storage Service (OSS) bucket.
CsvFileName	String	test_download_file	The name of the downloaded file.

Examples

Sample requests

http(s)://iot.cn-shanghai.aliyuncs.com/?Action=CreateDownloadDataJob
&IotInstanceId=iot-cn-npk1u******
&TableName=product_info
&DownloadDataType=TABLE
&StartTime=1658332800000
&EndTime=1658406464534
&<Common request parameters>

Sample success responses

XML format

HTTP/1.1 200 OK
Content-Type:application/xml

<CreateDownloadDataJobResponse>
    <code>200</code>
    <data>
        <asyncExecute>true</asyncExecute>
        <longJobId>62d949808bc742187xxxxxx</longJobId>
        <resultDataInString/>
        <status>-1</status>
    </data>
    <requestId>C8E9E92F-ADD1-1434-BA90-E85F70F5C536</requestId>
    <success>true</success>
</CreateDownloadDataJobResponse>

JSON format

HTTP/1.1 200 OK
Content-Type:application/json

{
  "code" : "200",
  "data" : {
    "asyncExecute" : true,
    "longJobId" : "62d949808bc742187xxxxxx",
    "resultDataInString" : "",
    "status" : -1
  },
  "requestId" : "C8E9E92F-ADD1-1434-BA90-E85F70F5C536",
  "success" : true
}

Error codes

HttpCode	Error code	Error message	Description
400	iot.dap.insight.noAuthorization	no authorization.	You do not have permissions to perform the operation.
400	iot.dap.insight.requestParamError	request param error.	The specified request parameter is invalid.
400	iot.dap.insight.serverError	server hsf error please try later	An error occurred in the backend High-speed Service Framework (HSF) service. Try again later.
400	iot.dap.insight.queryTimeMoreThanQueryDays	The query time range exceeded the allowed time range	The time range to query is invalid.
400	iot.dap.insight.processDownloadJobMoreConcurrenceCount	the number of concurrent download tasks in progress exceeds the upper limit	The number of download tasks that are concurrently running exceeds the limit.
400	iot.dap.insight.downloadTimesUpperLimit	the number of current job downloaded tasks exceeded the upper limit	The number of downloads for the download task on the current day exceeds the limit.
400	iot.dap.insight.downloadTaskNumUpperLimit	the number of downloaded tasks exceeded the upper limit	The number of download tasks that are executed on the current day exceeds the limit.

For a list of error codes, see Service error codes.