switch to json slog

dev.sh

@@ -2,4 +2,4 @@
 
 set -e
 
-go run main.go -cert=./keys/cert.crt.pem -key=./keys/localhost_key.pem -host=localhost:8080
+go run main.go -cert=./keys/localhost.crt.pem -key=./keys/localhost_key.pem -host=localhost:8080

main.go

@@ -4,7 +4,8 @@ import (
 	"errors"
 	"flag"
 	"fmt"
-	"log"
+	"log/slog"
+	"os"
 	"strconv"
 	"strings"
 	"time"
@@ -16,7 +17,9 @@ type ExampleHandler struct {
 }
 
 func (h ExampleHandler) ServeGemini(w gemini.ResponseWriter, req *gemini.Request) {
-	log.Printf("request: %s, user: %v", req.URL.Path, strings.Join(userName(req), " "))
+	slog.Info("gemini request",
+		"path", req.URL.Path,
+		"user", strings.Join(userName(req), " "))
 	switch req.URL.Path {
 	case "/":
 		gemini.ServeFileName("pages/home.gmi", "text/gemini")(w, req)
@@ -76,7 +79,13 @@ func userName(r *gemini.Request) []string {
 }
 
 func main() {
-	println("Starting gemini server")
+	// Set up structured JSON logging
+	logger := slog.New(slog.NewJSONHandler(os.Stdout, &slog.HandlerOptions{
+		Level: slog.LevelInfo,
+	}))
+	slog.SetDefault(logger)
+
+	slog.Info("Starting gemini server")
 	var host, cert, key string
 	flag.StringVar(&host, "host", ":1965", "listen on host and port.  Example: hostname:1965")
 	flag.StringVar(&cert, "cert", "server.crt.pem", "certificate file")
@@ -87,6 +96,7 @@ func main() {
 
 	err := gemini.ListenAndServe(host, cert, key, gemini.TrapPanic(handler.ServeGemini))
 	if err != nil {
-		log.Fatal(err)
+		slog.Error("server failed to start", "error", err)
+		os.Exit(1)
 	}
 }

pages/home.gmi

@@ -48,3 +48,5 @@ Took quite some tinkering to get everything working, but it's finally up and run
 
 You can find the source code for this capsule here:
 => https://git.travisshears.com/travisshears/personal-gemini-capsule
+Diagram created with:
+=> https://asciiflow.com