Add template practice exercise

2024-05-04 11:30:37 +02:00 · 2024-05-04 11:30:37 +02:00 · a6de42db31
parent 81b210b338
commit a6de42db31
3 changed files with 68 additions and 0 deletions
--- a/hello-template/assets/index.html
+++ b/hello-template/assets/index.html
@ -0,0 +1,5 @@
+<html>
+  <body>
+    <p>Hello {{ .userAgent }}!</p>
+  </body>
+</html>
--- a/hello-template/go.mod
+++ b/hello-template/go.mod
@ -0,0 +1,3 @@
+module hello-template
+
+go 1.22.2
--- a/hello-template/main.go
+++ b/hello-template/main.go
@ -0,0 +1,60 @@
+package main
+
+import (
+	"embed"
+	"fmt"
+	"html/template"
+	"io/fs"
+	"log"
+	"net/http"
+)
+
+var (
+	listenPort string = "1302"
+
+	pages = map[string]string{
+		"/": "assets/index.html",
+	}
+)
+
+//go:embed assets
+var assetsFolder embed.FS
+
+func getRoot(w http.ResponseWriter, r *http.Request) {
+	page, ok := pages[r.URL.Path]
+	if !ok {
+		w.WriteHeader(http.StatusNotFound)
+		return
+	}
+
+	tpl, err := template.ParseFS(assetsFolder, page)
+	if err != nil {
+		log.Printf("Error occurred parsing template: %v\n", err)
+		w.WriteHeader(http.StatusInternalServerError)
+	}
+	w.Header().Set("Content-Type", "text/html")
+	w.WriteHeader(http.StatusOK)
+	data := map[string]interface{}{
+		"userAgent": r.UserAgent(),
+	}
+	if err := tpl.Execute(w, data); err != nil {
+		log.Printf("Great: %v\n", err)
+	}
+}
+
+func main() {
+	serverRoot, err := fs.Sub(assetsFolder, "assets")
+	if err != nil {
+		log.Fatalf("Error occurred setting HTML root: %v\n", err)
+	}
+	http.FileServer(http.FS(serverRoot))
+
+	http.HandleFunc("/", getRoot)
+
+	fmt.Printf("Listening on port %v...\n", listenPort)
+
+	err = http.ListenAndServe(":"+listenPort, nil)
+	if err != nil {
+		log.Fatal(err)
+	}
+}