27 lines
731 B
Go
27 lines
731 B
Go
|
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
|
||
|
|
}
|