I need to provide some sort of REST API backed by a S3 bucket. The requirement is simple: given a certain key, it should return the contents of the file whose name is that key. If no such file is found in the bucket, then return a default content. In both cases, the response status code should be 200, because the client should not care where the result came from.
This requirement is so simple that I was trying to accomplish this without writing any code. So I tried to put an API created by Amazon API Gateway in front of the S3 bucket. But even though in the "Integration Response" section you can map a "HTTP status regex" to a "Method response status", apparently the same "Method response status" can't appear twice. So, I cannot have a default mapping to 200 while mapping 404 responses also to 200 with a custom body mapping template.
Is it possible to do this using only API Gateway?
