From e8b79478b1807b8f8828c51e989d83c5ae7d6d89 Mon Sep 17 00:00:00 2001
From: Ben Burwell <ben@benburwell.com>
Date: Mon, 13 Jul 2020 23:33:32 -0400
Subject: Initial commit

---
 main.go | 95 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 95 insertions(+)
 create mode 100644 main.go

(limited to 'main.go')

diff --git a/main.go b/main.go
new file mode 100644
index 0000000..434b936
--- /dev/null
+++ b/main.go
@@ -0,0 +1,95 @@
+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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