Expose acceptableImageContentTypes

[lickel]

Goals :soccer:

Expose ImageResponseSerializer.acceptableImageContentTypes for read-only consumption by API consumers.

Implementation Details :construction:

I have had a few instances where I need to express valid content types. The most recent use case was within a SwiftUI view where I wanted to download an image directly.

Testing Details :mag:

n/a

[jshier]

Simple enough, but can you clarify why you would ever need to access this value directly? If you need to download an image, I'd suggest wrapping an ImageDownloader into a SwiftUI view so you can take advantage of all of the AlamofireImage features.

[lickel]

I am using ImageDownloader. My issue is I want the same URLRequest that I would get from UIImageView.setImage(withURL...)

Those conversions are all in private extension functions with the form:

    private func urlRequest(with url: URL) -> URLRequest {
        var urlRequest = URLRequest(url: url)

        for mimeType in ImageResponseSerializer.acceptableImageContentTypes.sorted() {
            urlRequest.addValue(mimeType, forHTTPHeaderField: "Accept")
        }

        return urlRequest
    }

[lickel]

The other alternative would be to expose that func urlRequest(with url: URL) behavior publicly, e.g on ImageDownloader

[jshier]

Makes sense. This is probably an okay change, but I'll think about it more.

[lickel]

@jshier have you had a chance to give this more thought?

[jshier]

Makes sense, I just need to do some other updates before I can test and merge.

[lickel]

Just following up; do you think you'd be willing to merge this in?