GetDownloadFile - IoT Platform - Alibaba Cloud Documentation Center

Queries the result of a download task that is used to download the data of tables.

Usage notes

You can obtain the download link of a download task up to three times per day.
A download link is valid for 5 minutes.

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	GetDownloadFile	The operation that you want to perform. Set the value to GetDownloadFile.
Context	Map	No	{"xxx";xxx}	The content of the request.
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.
LongJobId	String	Yes	62d949808bc742187xxxxxx	The task ID that is returned when you created the download task. For more information, see the CreateDownloadDataJob parameter of the CreateDownloadDataJob operation.

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	BB71E443-4447-4024-A000-EDE09934****	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 data that is returned.
Status	Integer	1	The status of the download task. Valid values: -1: The download task is being initialized. 0: The download task is running. 1: The download task is executed 2: The download task failed to be executed. 3: The download task is submitted and pending execution. 4: The download task is canceled.
LongJobId	String	62d949808bc742187xxxxxx	The ID of the download task.
BeginTime	Long	1658406464534	The time when the download task started.
AsyncExecute	Boolean	true	Indicates whether the query is asynchronous. Valid values: true: The query is asynchronous. false: The query is synchronous.
TotalCount	Long	100	The total number of entries returned.
EndTime	Long	1658406465000	The time when the download task ended.
PreviewSize	Integer	100	The number of entries per preview page.
PageNo	Integer	1	The page number.
PageSize	Integer	10	The number of entries per page.
CsvUrl	String	https://xxxxx-data-download-sh.oss-cn-shanghai.aliyuncs.com/data/download/6B761BxxxxxxxxAAA0BF03D32C80E/62da39b9xxxxxx5a7b953376/download_file_name.csv?Expires=1658469132&OSSAccessKeyId=xxxxxxxxx&Signature=rRL%xxxxxxx%3D	The download link of the CSV file that is stored in an Object Storage Service (OSS) bucket. The download link is valid for 5 minutes.
CsvFileName	String	test_download_flie	The name of the CSV file
DatasetId	String	xxxxxx	The ID of the downloaded object.
ResultDataInString	String	{"a":123}	The result of the query.
Header	Array of Header		The details of the fields that are returned.
TypeClass	String	date	The type dimension.
FieldName	String	user_name	The name of the field.
GeoClass	String	{xxx:xxxx}	The geographic information.
FieldType	String	INTEGER	The type of the field.
TimeClass	String	HOUR/DAY/MONTH	The time dimension.
DimDateClass	String	DAY	The schedule type.
Alias	String	user_name_alias	The alias of the field.
Result	Array of Object	{"a":123}
QuerySetting	Object		The details of the query.
SelectedHeaders	Array of SelectedHeaders		The queried fields.
FieldName	String	user_name	The name of the field.
GeoClass	String	{xxx:xxx}	The geographic information.
FieldType	String	INTEGER	The type of the field.
TimeClass	String	HOUR/DAY/MONTH	The date dimension.
Alias	String	user_name_alias	The alias of the field.
DimDateClass	String	DAY	The schedule type.
AstExpr	Array of AstExpr		The query conditions.
ExprType	String	binaryOp	The type of the expression.
Expr	String	{"header":{"fieldName":"xxx"},"operator":"GreaterThanOrEqual","value":12345}	The content of the expression.

Examples

Sample requests

http(s)://iot.cn-shanghai.aliyuncs.com/?Action=GetDownloadFile
&IotInstanceId=iot-cn-npk1u******
&LongJobId=62d949808bc742187xxxxxx
&<Common request parameters>

Sample success responses

XML format

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

<GetDownloadFileResponse>
    <code/>
    <data>
        <asyncExecute>true</asyncExecute>
        <csvFileName>download_file_name</csvFileName>
        <csvUrl>https://insight-data-download-sh.oss-cn-shanghai.aliyuncs.com/data/download/6B761B2617454C9C9AAA0BF03D32C80E/62da39b9a48f865a7b953376/download_file_name.csv?Expires=1658469132&amp;OSSAccessKeyId=xxxxxxxxx&amp;Signature=rRL%xxxxxxx%3D</csvUrl>
        <longJobId>62d949808bc742187xxxxxx</longJobId>
        <status>1</status>
    </data>
    <requestId>41CF72F4-63C1-1EBA-8590-89D0F0CD298A</requestId>
    <success>true</success>
</GetDownloadFileResponse>

JSON format

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

{
  "code" : "",
  "data" : {
    "asyncExecute" : true,
    "csvFileName" : "download_file_name",
    "csvUrl" : "https://insight-data-download-sh.oss-cn-shanghai.aliyuncs.com/data/download/6B761B2617454C9C9AAA0BF03D32C80E/62da39b9a48f865a7b953376/download_file_name.csv?Expires=1658469132&amp;OSSAccessKeyId=xxxxxxxxx&amp;Signature=rRL%xxxxxxx%3D",
    "longJobId" : "62d949808bc742187xxxxxx",
    "status" : 1
  },
  "requestId" : "41CF72F4-63C1-1EBA-8590-89D0F0CD298A",
  "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.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.
400	iot.dap.insight.downloadTimesUpperLimit	the number of current job downloaded tasks exceeded the upper limit	The number of downloads for the current download task on the current day exceeds the limit.

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