Auto WebP is Activated but Content Type Still JPEG

[tcagkansokmen]

Describe the bug
I've newly installed version 6.1.1.
I've enabled "AutoWebp" and you can see configuration below:

After I resize a photo, I send a "postman request" to see whats content type.

And it returns "image/jpeg" as you can see.

Please complete the following information about the solution:

• Version:6.1.1
• Region: us-east-1
• Was the solution modified from the version published on this repository? No
• If the answer to the previous question was yes, are the changes available on GitHub?

[tetz2442]

You'd have to make sure your postman request has an accepts header that contains image/webp. Could that be why it is still returning a jpg?

See here for how it decides if it should serve a webp image or not: https://github.com/aws-solutions/serverless-image-handler/blob/develop/source/image-handler/image-request.ts#L431

[dougtoppin]

Thanks for your report. We added it to our backlog and will get back to you with more information.

[kevinzg]

@tetz2442 the event.headers object looks like this in my case:

{
  headers: {
    accept: 'text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8'
  }
}

So in this line:

serverless-image-handler/source/image-handler/image-request.ts

Line 431 in 5c79a44

if (AUTO_WEBP === "Yes" && event.headers.Accept && event.headers.Accept.includes(ContentTypes.WEBP)) {

We should use .accept, or check both accept and Accept.

[ccchapman]

+1 Confirming this issue on 6.1.2 when accept: image/webp is present in request, content-type: image/jpeg is in response.

[dougtoppin]

resolved in v6.2.4