Queries the progress of a specified asynchronous task.

Request parameters

Name Type Required Description
Action String Yes The name of this interface. Value: DescribeTasks.
RegionId String Yes Region ID. For more information, call DescribeRegions to obtain the latest region list.
TaskAction String Yes The specified action to be queried. Optional values:
TaskIds String No Task ID. Up to 100 task IDs are supported, and they are separated by comma (,).
TaskStatus String No Task status. Optional values:
  • Finished
  • Processing
  • Waiting
  • Deleted
  • Paused
Default value: null.

Currently, you can query the task in the Finished and Processing status, and other value is ignored in the request.

StartTime String No Query by creation time, start time of the creation time period. The time is displayed in the format specified in the ISO8601 standard, and the UTC time is used. Format: YYYY-MM-DDThh:mmZ.
EndTime String No Query by creation time, start time of the creation time period. The time is displayed in the format specified in the ISO8601 standard, and the UTC time is used. It is in the format of YYYY-MM-DDThh:mmZ.
PageNumber Integer No Page number of the query result. Initial value: 1, default value: 1.
PageSize Integer No Number of lines on each page, set for pagination query. Maximum value: 100, default value: 10.

Response parameters

Name Type Description
TaskSet TaskType TaskSet
RegionId String Regional ID.
TotalCount Integer Number of items in the list.
PageNumber Integer Current page number.
PageSize Integer Number of items included in the current page.

Examples

Request example 

https://ecs.aliyuncs.com/?Action=DescribeTasks
&RegionId=cn-hangzhou
&<Common Request Parameters>
Response example

XML format

<DescribeTasksResponse>
  <PageNumber>1</PageNumber>
  <TotalCount>2</TotalCount>
  <PageSize>2</PageSize>
  <RegionId>cn-hangzhou</RegionId>
  <RequestId>E5C82807-5588-4661-9A96-350B206A7623</RequestId>
  <TaskSet>
    <Task>
      <CreationTime>2015-11-24T12:50Z</CreationTime>
      <FinishedTime>2015-11-24T12:50Z</FinishedTime>
      <SupportCancel>true</SupportCancel>
      <TaskAction>IMPORT_IMAGE</TaskAction>
      <TaskStatus>Finished</TaskStatus>
      <TaskId>t-23mo8zf9w</TaskId>
    </Task>
    <Task>
      <CreationTime>2015-11-23T15:10Z</CreationTime>
      <FinishedTime>2015-11-23T15:16Z</FinishedTime>
      <SupportCancel>true</SupportCancel>
      <TaskAction>IMPORT_IMAGE</TaskAction>
      <TaskStatus>Finished</TaskStatus>
      <TaskId>t-23sgu0dyj</TaskId>
    </Task>
  </TaskSet>
</DescribeTasksResponse>

JSON format

{
    "PageNumber": 1,
    "TotalCount": 2,
    "PageSize": 2,
    "RegionId": "cn-hangzhou",
    "RequestId": "F746C690-D9EA-4F87-AF31-8E1910FAB541"，
    "TaskSet": {
        "Task": [
            {
                "CreationTime": "2015-11-24T12:50Z",
                "FinishedTime": "2015-11-24T12:50Z",
                "SupportCancel": true,
                "TaskAction": "ImportImage",
                "TaskStatus": "Finished",
                "TaskId": "t-23mo8zf9w"
            },
            {
                "CreationTime": "2015-11-23T15:10Z",
                "FinishedTime": "2015-11-23T15:16Z",
                "SupportCancel": true,
                "TaskAction": "ImportImage",
                "TaskStatus": "Finished",
                "TaskId": "t-23sgu0dyj"
            }
        ]
    }
}

Error codes

Error codes specific to this interface are as follows. For more error codes, see API Error Center.

Error code Error message HTTP status code Meaning
MissingParameter An input parameter “RegionId” that is mandatory for processing the request is not supplied. 400 The required parameter RegionId is missing.
InvalidRegionId.NotFound The specified region not found. 400 The specified RegionId does not exist.