githaven/vendor/github.com/go-chi/chi/middleware/heartbeat.go

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package middleware
import (
"net/http"
"strings"
)
// Heartbeat endpoint middleware useful to setting up a path like
// `/ping` that load balancers or uptime testing external services
// can make a request before hitting any routes. It's also convenient
// to place this above ACL middlewares as well.
func Heartbeat(endpoint string) func(http.Handler) http.Handler {
f := func(h http.Handler) http.Handler {
fn := func(w http.ResponseWriter, r *http.Request) {
if r.Method == "GET" && strings.EqualFold(r.URL.Path, endpoint) {
w.Header().Set("Content-Type", "text/plain")
w.WriteHeader(http.StatusOK)
w.Write([]byte("."))
return
}
h.ServeHTTP(w, r)
}
return http.HandlerFunc(fn)
}
return f
}