Method Handler

middleware/route_headers.go:77–108

(next http.Handler)

}

func (hr HeaderRouter) Handler(next http.Handler) http.Handler {
	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
		if len(hr) == 0 {
			// skip if no routes set
			next.ServeHTTP(w, r)
			return
		}

		// find first matching header route, and continue
		for header, matchers := range hr {
			headerValue := r.Header.Get(header)
			if headerValue == "" {
				continue
			}
			headerValue = strings.ToLower(headerValue)
			for _, matcher := range matchers {
				if matcher.IsMatch(headerValue) {
					matcher.Middleware(next).ServeHTTP(w, r)
					return
				}
			}
		}

		// if no match, check for "*" default route
		matcher, ok := hr["*"]
		if !ok || matcher[0].Middleware == nil {
			next.ServeHTTP(w, r)
			return
		}
		matcher[0].Middleware(next).ServeHTTP(w, r)
	})
}

type HeaderRoute struct {
	Middleware func(next http.Handler) http.Handler