Question 19383 in Amazon Web Sevices Question posted in
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AWS SNS http suscription return "Unsupported Media Type: Content type 'text/plain;charset=UTF-8' not supported"

I have an SNS topic and an HTTP subscription, that call a Spring boot endpoint, my endpoint looks like this:

@RestController
public class MyController {

    @PostMapping(value = "/path")
    public ResponseEntity<Void> action(@RequestBody Object body) {
        return ResponseEntity.noContent().build();
    }
}

I try to call this endpoint when I publish a message in this topic using AWS CLI like this:

aws sns publish --topic-arn arn:aws:sns:eu-west-1:000000000000:MyTopic 
    --message '{"name": "test"}' --endpoint-url http://localhost:4566

but I got an error:

Unsupported Media Type: Content type 'text/plain;charset=UTF-8' is not supported

I add MediaType.TEXT_PLAIN_VALUE to my code:

@PostMapping(value = "/path", consumes = MediaType.TEXT_PLAIN_VALUE)

But I got the same error.

For some reason, the topic sends the message using a different text/plain media type.

I learned this documentation, and effectively the message is send using:

...
Content-Type: text/plain; charset=UTF-8
...

My question is there any way to force the SNS publisher to use application/json?

Or is there any way to solve the issue in my controller?

Tags:

2

Answers


  1. Chosen as BEST ANSWER
    0

    The problem solved when I used MediaType.TEXT_PLAIN_VALUE and @RequestBody String body

    @PostMapping(value = "/path", consumes = MediaType.TEXT_PLAIN_VALUE)
public ResponseEntity<String> action(@RequestBody String body) {

  2. 0

    Amazon SNS now supports custom Content-Type headers for HTTP messages delivered from topics. Here’s the announcement: https://aws.amazon.com/about-aws/whats-new/2023/03/amazon-sns-content-type-request-headers-http-s-notifications/

    You simply have to modify the DeliveryPolicy attribute of your Amazon SNS subscription, setting the headerContentType property to application/json, application/xml, or any other value supported. You can find all values supported here: https://docs.aws.amazon.com/sns/latest/dg/sns-message-delivery-retries.html#creating-delivery-policy

    {
    "healthyRetryPolicy": {
        "minDelayTarget": 1,
        "maxDelayTarget": 60,
        "numRetries": 50,
        "numNoDelayRetries": 3,
        "numMinDelayRetries": 2,
        "numMaxDelayRetries": 35,
        "backoffFunction": "exponential"
    },
    "throttlePolicy": {
        "maxReceivesPerSecond": 10
    },
    "requestPolicy": {
        "headerContentType": "application/json"
    }
}

    You set the DeliveryPolicy attribute by calling the SetSubscriptionAttributes API action: https://docs.aws.amazon.com/sns/latest/api/API_SetSubscriptionAttributes.html

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