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package main
import (
"context"
"fmt"
"io"
"log"
"net/http"
"strings"
"github.com/kelseyhightower/envconfig"
"golang.org/x/sync/errgroup"
"bnbl.io/csp_exporter/collector"
"bnbl.io/csp_exporter/csp"
)
type config struct {
CollectorBindAddr string `envconfig:"COLLECTOR_BIND_ADDR" required:"true"`
PromBindAddr string `envconfig:"PROM_BIND_ADDR" default:":9477"`
}
func main() {
var cfg config
if err := envconfig.Process("", &cfg); err != nil {
log.Fatalf("could not read configuration from environment: %v", err)
}
coll, err := collector.NewCollector()
if err != nil {
log.Fatalf("could not create collector: %v", err)
}
cspHandler := http.NewServeMux()
cspHandler.HandleFunc("/report/csp/", func(w http.ResponseWriter, r *http.Request) {
if r.Method != "POST" {
w.WriteHeader(http.StatusBadRequest)
return
}
if r.Header.Get("content-type") != "application/csp-report" {
w.WriteHeader(http.StatusBadRequest)
return
}
app := strings.TrimPrefix(r.URL.EscapedPath(), "/report/csp/")
if app == "" {
w.WriteHeader(http.StatusNotFound)
return
}
report, err := csp.ReadReport(r.Body)
if err == io.EOF {
w.WriteHeader(http.StatusBadRequest)
return
} else if err != nil {
w.WriteHeader(http.StatusInternalServerError)
return
}
w.WriteHeader(http.StatusOK)
coll.Collect(app, report)
})
g, ctx := errgroup.WithContext(context.Background())
// start metrics server
g.Go(func() error {
h := http.NewServeMux()
h.Handle("/metrics", coll.Handler())
srv := &http.Server{Addr: cfg.PromBindAddr, Handler: h}
go func() {
<-ctx.Done()
if err := srv.Shutdown(ctx); err != nil {
log.Printf("shutdown metrics server: %v", err)
}
}()
return fmt.Errorf("metrics server: %v", srv.ListenAndServe())
})
// start CSP collector server
g.Go(func() error {
srv := &http.Server{Addr: cfg.CollectorBindAddr, Handler: cspHandler}
go func() {
<-ctx.Done()
if err := srv.Shutdown(ctx); err != nil {
log.Printf("shutdown collector server: %v", err)
}
}()
return fmt.Errorf("collector server: %v", srv.ListenAndServe())
})
if err := g.Wait(); err != nil {
log.Fatal(err)
}
}
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