HTTP/HTTPS headers - Amazon Simple Notification Service
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HTTP/HTTPS headers

When Amazon SNS sends a subscription confirmation, notification, or unsubscribe confirmation message to HTTP/HTTPS endpoints, it sends a POST message with a number of Amazon SNS-specific header values. You can use header values for such tasks as identifying the message type without having to parse the JSON message body to read the Type value. By default, Amazon SNS sends all the notification to HTTP/S endpoints with Content-Type set to text/plain; charset=UTF-8. To choose a Content-Type other than text/plain (default), see headerContentType in Creating an HTTP/S delivery policy.

x-amz-sns-message-type

The type of message. The possible values are SubscriptionConfirmation, Notification, and UnsubscribeConfirmation.

x-amz-sns-message-id

A Universally Unique Identifier (UUID), unique for each message published. For a notification that Amazon SNS resends during a retry, the message ID of the original message is used.

x-amz-sns-topic-arn

The Amazon Resource Name (ARN) for the topic that this message was published to.

x-amz-sns-subscription-arn

The ARN for the subscription to this endpoint.

The following HTTP POST header is an example of a header for a Notification message to an HTTP endpoint.

POST / HTTP/1.1
x-amz-sns-message-type: Notification
x-amz-sns-message-id: 165545c9-2a5c-472c-8df2-7ff2be2b3b1b
x-amz-sns-topic-arn: arn:aws-cn:sns:us-west-2:123456789012:MyTopic
x-amz-sns-subscription-arn: arn:aws-cn:sns:us-west-2:123456789012:MyTopic:2bcfbf39-05c3-41de-beaa-fcfcc21c8f55
Content-Length: 1336
Content-Type: text/plain; charset=UTF-8
Host: myhost.example.com
Connection: Keep-Alive
User-Agent: Amazon Simple Notification Service Agent