hw/main.go

65 lines
1.5 KiB
Go

package main
import (
"encoding/json"
"fmt"
"log"
"math/rand"
"net/http"
"os"
"github.com/prometheus/client_golang/prometheus/promhttp"
"mcquay.me/metrics"
)
const version = "v0.1.0"
type v struct {
Hostname string `json:"hostname"`
V string `json:"version"`
}
func main() {
m, err := metrics.New("hw")
if err != nil {
log.Fatalf("metrics: %v", err)
}
hn, err := os.Hostname()
if err != nil {
log.Fatalf("hostname: %+v", err)
}
http.HandleFunc("/", m.WrapFunc("/", func(w http.ResponseWriter, req *http.Request) {
w.Header().Set("Content-Type", "application/json")
r := v{
Hostname: hn,
V: version,
}
if err := json.NewEncoder(w).Encode(r); err != nil {
log.Printf("json: %+v", err)
}
}))
http.HandleFunc("/env", m.WrapFunc("/env", func(w http.ResponseWriter, req *http.Request) {
for _, line := range os.Environ() {
fmt.Fprintf(w, "%v\n", line)
}
}))
codes := []int{
http.StatusBadGateway,
http.StatusBadRequest,
http.StatusUnauthorized,
}
http.HandleFunc("/bad", m.WrapFunc("/bad", func(w http.ResponseWriter, req *http.Request) {
code := codes[rand.Intn(len(codes))]
w.WriteHeader(code)
}))
http.HandleFunc("/live", m.WrapFunc("/live", ok))
http.HandleFunc("/ready", m.WrapFunc("/ready", ok))
http.Handle("/metrics", promhttp.Handler())
if err := http.ListenAndServe(":8080", nil); err != nil {
log.Fatalf("listen and serve: %v", err)
}
}
func ok(w http.ResponseWriter, req *http.Request) {}