Send an SNS message in JSON format using the CLI
Example:
aws sns publish \
--topic-arn="$SNS_ARN" \
--message "{\"data\":\"Some Data here\",\"date\":\"$(date)\"}" \
--subject "Testing JSON format with SNS"
The lambda will receive the data and extract it like that :
module.exports = (event, context) => {
const jsonData =
(event &&
event.Records[0].Sns &&
event.Records[0].Sns.Message &&
typeof event.Records[0].Sns.Message === "string"
? JSON.parse(event.Records[0].Sns.Message)
: event.Records[0].Sns.Message) || {};
};
A payload example format received by a lambda from an SNS :
{
"Records": [
{
"EventSource": "aws:sns",
"EventVersion": "1.0",
"EventSubscriptionArn": "arn:aws:sns:us-east-1:123456789012:lambda_topic:0b6941c3-f04d-4d3e-a66d-b1df00e1e381",
"Sns": {
"Type": "Notification",
"MessageId": "95df01b4-ee98-5cb9-9903-4c221d41eb5e",
"TopicArn": "arn:aws:sns:us-east-1:123456789012:lambda_topic",
"Subject": "TestInvoke",
"Message": "<message payload>",
"Timestamp": "2015-04-02T07:36:57.451Z",
"SignatureVersion": "1",
"Signature": "r0Dc5YVHuAglGcmZ9Q7SpFb2PuRDFmJNprJlAEEk8CzSq9Btu8U7dxOu++uU",
"SigningCertUrl": "http://sns.us-east-1.amazonaws.com/SimpleNotificationService-d6d679a1d18e95c2f9ffcf11f4f9e198.pem",
"UnsubscribeUrl": "http://cloudcast.amazon.com/?Action=Unsubscribe&SubscriptionArn=arn:aws:sns:us-east-1:123456789012:example_topic:0b6941c3-f04d-4d3e-a66d-b1df00e1e381",
"MessageAttributes": { "key": { "Type": "String", "Value": "value" } }
}
}
]
}