允许的内容类型超过：大猩猩中的application / json

Question

Using the excellent Gorilla mux I have special handler for API requests using application/json as content-type:

apiRouter := router.PathPrefix("/api").Headers("Content-Type", "application/json").Subrouter()

However, some users like to provide more than just that string, i.e. application/json; charset=UTF-8. When this header value is set, the handler returns a 404.

What's the best way to handle this by allowing json and any charset specs?

Answer 1

Here's how I did it:

apiRouter := router.PathPrefix("/api").HeadersRegexp("Content-Type", fmt.Sprintf("%s.*", MIMEApplicationJSON)).Subrouter()

Remember, you may apply routing at the actual end point rather than at the root level. For GET requests there would be no need to specify Content-Type, but for POST, you should check for one.