client_golang/examples/delegator/main.go

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// Copyright (c) 2012, Matt T. Proud
// All rights reserved.
//
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// This skeletal example of the telemetry library is provided to demonstrate the
// use of boilerplate HTTP delegation telemetry methods.
package main
import (
"flag"
"github.com/prometheus/client_golang"
"github.com/prometheus/client_golang/exp"
"net/http"
)
// helloHandler demonstrates the DefaultCoarseMux's ability to sniff a
// http.ResponseWriter (specifically http.response) implicit setting of
// a response code.
func helloHandler(w http.ResponseWriter, r *http.Request) {
w.Write([]byte("Hello, hello, hello..."))
}
// goodbyeHandler demonstrates the DefaultCoarseMux's ability to sniff an
// http.ResponseWriter (specifically http.response) explicit setting of
// a response code.
func goodbyeHandler(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusGone)
w.Write([]byte("... and now for the big goodbye!"))
}
// teapotHandler demonstrates the DefaultCoarseMux's ability to sniff an
// http.ResponseWriter (specifically http.response) explicit setting of
// a response code for pure comedic value.
func teapotHandler(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusTeapot)
w.Write([]byte("Short and stout..."))
}
var (
listeningAddress = flag.String("listeningAddress", ":8080", "The address to listen to requests on.")
)
func main() {
flag.Parse()
exp.HandleFunc("/hello", helloHandler)
exp.HandleFunc("/goodbye", goodbyeHandler)
exp.HandleFunc("/teapot", teapotHandler)
exp.Handle(registry.ExpositionResource, registry.DefaultHandler)
http.ListenAndServe(*listeningAddress, exp.DefaultCoarseMux)
}