subscribe¶

Description¶

Subscribes an endpoint to an Amazon SNS topic. If the endpoint type is HTTP/S or email, or if the endpoint and the topic are not in the same Amazon Web Services account, the endpoint owner must run the ConfirmSubscription action to confirm the subscription.

You call the ConfirmSubscription action with the token from the subscription response. Confirmation tokens are valid for three days.

This action is throttled at 100 transactions per second (TPS).

Synopsis¶

  subscribe
--topic-arn <value>
--protocol <value>
[--attributes <value>]
[--return-subscription-arn | --no-return-subscription-arn]
[--notification-endpoint <value>]
[--cli-input-json | --cli-input-yaml]
[--generate-cli-skeleton <value>]

Options¶

--topic-arn (string)

The ARN of the topic you want to subscribe to.

--protocol (string)

The protocol that you want to use. Supported protocols include:

http – delivery of JSON-encoded message via HTTP POST

https – delivery of JSON-encoded message via HTTPS POST

email – delivery of message via SMTP

email-json – delivery of JSON-encoded message via SMTP

sms – delivery of message via SMS

sqs – delivery of JSON-encoded message to an Amazon SQS queue

application – delivery of JSON-encoded message to an EndpointArn for a mobile app and device

lambda – delivery of JSON-encoded message to an Lambda function

firehose – delivery of JSON-encoded message to an Amazon Kinesis Data Firehose delivery stream.

--attributes (map)

A map of attributes with their corresponding values.

The following lists the names, descriptions, and values of the special request parameters that the Subscribe action uses:

DeliveryPolicy – The policy that defines how Amazon SNS retries failed deliveries to HTTP/S endpoints.

FilterPolicy – The simple JSON object that lets your subscriber receive only a subset of messages, rather than receiving every message published to the topic.

RawMessageDelivery – When set to true , enables raw message delivery to Amazon SQS or HTTP/S endpoints. This eliminates the need for the endpoints to process JSON formatting, which is otherwise created for Amazon SNS metadata.

RedrivePolicy – When specified, sends undeliverable messages to the specified Amazon SQS dead-letter queue. Messages that can’t be delivered due to client errors (for example, when the subscribed endpoint is unreachable) or server errors (for example, when the service that powers the subscribed endpoint becomes unavailable) are held in the dead-letter queue for further analysis or reprocessing.

The following attribute applies only to Amazon Kinesis Data Firehose delivery stream subscriptions:

SubscriptionRoleArn – The ARN of the IAM role that has the following:

Permission to write to the Kinesis Data Firehose delivery stream

Amazon SNS listed as a trusted entity

Specifying a valid ARN for this attribute is required for Kinesis Data Firehose delivery stream subscriptions. For more information, see Fanout to Kinesis Data Firehose delivery streams in the Amazon SNS Developer Guide .

key -> (string)

value -> (string)

Shorthand Syntax:

KeyName1=string,KeyName2=string

JSON Syntax:

{"string": "string"
  ...}

--return-subscription-arn | --no-return-subscription-arn (boolean)

Sets whether the response from the Subscribe request includes the subscription ARN, even if the subscription is not yet confirmed.

If you set this parameter to true , the response includes the ARN in all cases, even if the subscription is not yet confirmed. In addition to the ARN for confirmed subscriptions, the response also includes the pending subscription ARN value for subscriptions that aren’t yet confirmed. A subscription becomes confirmed when the subscriber calls the ConfirmSubscription action with a confirmation token.

The default value is false .

--notification-endpoint (string)

The endpoint that you want to receive notifications. Endpoints vary by protocol:

For the http protocol, the (public) endpoint is a URL beginning with http:// .

For the https protocol, the (public) endpoint is a URL beginning with https:// .

For the email protocol, the endpoint is an email address.

For the email-json protocol, the endpoint is an email address.

For the sms protocol, the endpoint is a phone number of an SMS-enabled device.

For the sqs protocol, the endpoint is the ARN of an Amazon SQS queue.

For the application protocol, the endpoint is the EndpointArn of a mobile app and device.

For the lambda protocol, the endpoint is the ARN of an Lambda function.

For the firehose protocol, the endpoint is the ARN of an Amazon Kinesis Data Firehose delivery stream.

--cli-input-json | --cli-input-yaml (string) Reads arguments from the JSON string provided. The JSON string follows the format provided by --generate-cli-skeleton. If other arguments are provided on the command line, those values will override the JSON-provided values. It is not possible to pass arbitrary binary values using a JSON-provided value as the string will be taken literally. This may not be specified along with --cli-input-yaml.

--generate-cli-skeleton (string) Prints a JSON skeleton to standard output without sending an API request. If provided with no value or the value input, prints a sample input JSON that can be used as an argument for --cli-input-json. Similarly, if provided yaml-input it will print a sample input YAML that can be used with --cli-input-yaml. If provided with the value output, it validates the command inputs and returns a sample output JSON for that command. The generated JSON skeleton is not stable between versions of the AWS CLI and there are no backwards compatibility guarantees in the JSON skeleton generated.

See ‘aws help’ for descriptions of global parameters.

Examples¶

Note

To use the following examples, you must have the AWS CLI installed and configured. See the Getting started guide in the AWS CLI User Guide for more information.

Unless otherwise stated, all examples have unix-like quotation rules. These examples will need to be adapted to your terminal’s quoting rules. See Using quotation marks with strings in the AWS CLI User Guide .

To subscribe to a topic

The following subscribe command subscribes an email address to the specified topic.

aws sns subscribe \
    --topic-arn arn:aws:sns:us-west-2:123456789012:my-topic \
    --protocol email \
    --notification-endpoint my-email@example.com

Output:

{
    "SubscriptionArn": "pending confirmation"
}

Output¶

SubscriptionArn -> (string)

The ARN of the subscription if it is confirmed, or the string “pending confirmation” if the subscription requires confirmation. However, if the API request parameter ReturnSubscriptionArn is true, then the value is always the subscription ARN, even if the subscription requires confirmation.

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