Delete Message (Azure Storage)

Artikkeli
06/27/2023

The Delete Message operation deletes the specified message from the queue.

Request

You can construct the Delete Message request as follows. HTTPS is recommended.

Method	Request URI	HTTP version
`DELETE`	`https://myaccount.queue.core.windows.net/myqueue/messages/messageid?popreceipt=string-value`	HTTP/1.1

Replace myaccount with the name of your storage account, myqueue with the name of your queue, and string-value with the value of the pop receipt that has been obtained for the message to be deleted.

Emulated storage service URI

When you make a request against the emulated storage service, specify the emulator host name and Azure Queue Storage port as 127.0.0.1:10001, followed by the emulated storage account name.

Method	Request URI	HTTP version
`DELETE`	`http://127.0.0.1:10001/devstoreaccount1/myqueue/messages/messageid?popreceipt=string-value`	HTTP/1.1

URI parameters

The request URI supports the following parameters.

Parameter	Description
`popreceipt`	Required. A valid pop receipt value returned from an earlier call to the Get Messages or Update Message operation.
`timeout`	Optional. The `timeout` parameter is expressed in seconds. For more information, see Setting timeouts for Queue Storage operations.

Request headers

The following table describes required and optional request headers.

Request header	Description
`Authorization`	Required. Specifies the authorization scheme, account name, and signature. For more information, see Authorize requests to Azure Storage.
`Date` or `x-ms-date`	Required. Specifies the Coordinated Universal Time (UTC) for the request. For more information, see Authorize requests to Azure Storage.
`x-ms-version`	Optional. Specifies the version of the operation to use for this request. For more information, see Versioning for the Azure Storage services.
`x-ms-client-request-id`	Optional. Provides a client-generated, opaque value with a 1-kibibyte (KiB) character limit that's recorded in the logs when logging is configured. We highly recommend that you use this header to correlate client-side activities with requests that the server receives. For more information, see Monitor Azure Queue Storage.

Request body

None.

Response

The response includes an HTTP status code and a set of response headers.

Status code

A successful operation returns status code 204 (No Content). For information about status codes, see Status and error codes.

Response headers

The response for this operation includes the following headers. The response also includes additional, standard HTTP headers. All standard headers conform to the HTTP/1.1 protocol specification.

Request Header	Description
`x-ms-request-id`	This header uniquely identifies the request that was made, and can be used for troubleshooting the request. For more information, see Troubleshooting API operations.
`x-ms-version`	Indicates the version of Queue Storage used to run the request. This header is returned for requests made against version 2009-09-19 and later.
`Date`	A UTC date/time value that indicates the time at which the response was initiated. The service generates this value.
`x-ms-client-request-id`	This header can be used to troubleshoot requests and corresponding responses. The value of this header is equal to the value of the `x-ms-client-request-id` header, if it's present in the request. The value is at most 1,024 visible ASCII characters. If the `x-ms-client-request-id` header isn't present in the request, this header won't be present in the response.

Response body

None.

Authorization

The account owner can perform this operation. Additionally, anyone with a shared access signature who has permission to perform this operation can perform it.

Remarks

When you successfully delete a message, it's immediately marked for deletion, and is no longer accessible.

After a client retrieves a message with the Get Messages operation, the client is expected to process and delete the message. To delete the message, you must have two items of data returned in the response body of the Get Messages operation:

The message ID, an opaque GUID value that identifies the message in the queue.
A valid pop receipt, an opaque value that indicates that the message has been retrieved.

The message ID is returned from the previous Get Messages operation. The pop receipt is returned from the most recent Get Messages or Update Message operation. For the Delete Message operation to succeed, the pop receipt specified on the request must match the pop receipt returned from the Get Messages or Update Message operation.

Pop receipts remain valid until one of the following events occurs:

The message expires.
The message is deleted by using the last pop receipt received, either from Get Messages or Update Message.
The invisibility timeout expires, and the message is dequeued by a Get Messages request. When the invisibility timeout expires, the message becomes visible again. If it's retrieved by another Get Messages request, the returned pop receipt can be used to delete or update the message.
The message is updated with a new visibility timeout. When the message is updated, a new pop receipt is returned.

If a message with a matching pop receipt isn't found, the service returns error code 404 (Not Found). This error occurs in the previously listed cases in which the pop receipt is no longer valid.

Jaa