✨ App health check endpoint

internal/httpserver/server.go

@@ -6,6 +6,7 @@ import (
 	"net/http"
 
 	"git.gnous.eu/gnouseu/plakken/internal/constant"
+	"git.gnous.eu/gnouseu/plakken/internal/web/health"
 	"git.gnous.eu/gnouseu/plakken/internal/web/plak"
 	"github.com/redis/go-redis/v9"
 )
@@ -40,6 +41,7 @@ func (config ServerConfig) router() {
 
 	http.HandleFunc("GET /{$}", config.home)
 	http.Handle("GET /static/{file}", http.FileServer(staticFiles))
+	http.HandleFunc("GET /health/", health.Config{DB: config.DB}.Health)
 	http.HandleFunc("GET /{key}/{settings...}", WebConfig.View)
 	http.HandleFunc("POST /{$}", WebConfig.CurlCreate)
 	http.HandleFunc("POST /create/{$}", WebConfig.PostCreate)

internal/web/health/health.go

@@ -0,0 +1,34 @@
+package health
+
+import (
+	"io"
+	"log"
+	"net/http"
+
+	"git.gnous.eu/gnouseu/plakken/internal/database"
+	"github.com/redis/go-redis/v9"
+)
+
+type Config struct {
+	DB *redis.Client
+}
+
+func (config Config) Health(w http.ResponseWriter, _ *http.Request) {
+	err := database.Ping(config.DB)
+	w.Header().Set("Content-Type", "text/plain; charset=utf-8")
+	if err != nil {
+		log.Println(err)
+		w.WriteHeader(http.StatusInternalServerError)
+		_, err := io.WriteString(w, "Redis connection has failed")
+		if err != nil {
+			log.Println(err)
+		}
+
+		return
+	}
+	w.WriteHeader(http.StatusOK)
+	_, err = io.WriteString(w, "ok")
+	if err != nil {
+		log.Println(err)
+	}
+}