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package main
import (
"embed"
"flag"
"fmt"
"html/template"
"io"
"log"
"net/http"
"strings"
"time"
)
var (
port = flag.Int("port", 42069, "port to listen on")
serverStartTime = time.Now()
)
var (
//go:embed templates/404.html.template
notFoundString string
notFoundTemplate = template.Must(template.New("notFound").Parse(notFoundString))
)
func notFound(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(http.StatusNotFound)
type args struct {
Path string
}
if err := notFoundTemplate.Execute(w, args{Path: r.URL.Path}); err != nil {
log.Printf("Warning: notFound: %s", err)
}
}
var (
//go:embed templates/outline.html.template
outlineString string
outlineTemplate = template.Must(template.New("outline").Parse(outlineString))
//go:embed templates/index.html.template
indexString string
indexTemplate = template.Must(template.Must(outlineTemplate.Clone()).New("body").Parse(indexString))
)
func index(w http.ResponseWriter, _ *http.Request) {
if err := indexTemplate.ExecuteTemplate(w, "outline", nil); err != nil {
log.Printf("Warning: index: %s", err)
}
}
var (
//go:embed templates/pong.html.template
pongString string
pongTemplate = template.Must(template.New("pong").Parse(pongString))
)
func pong(w http.ResponseWriter, _ *http.Request) {
if err := pongTemplate.Execute(w, nil); err != nil {
log.Printf("Warning: pong: %s", err)
}
}
//go:embed static
var staticFiles embed.FS
func serveStaticFile(w http.ResponseWriter, r *http.Request, path string) {
f, err := staticFiles.Open(path)
if err != nil {
notFound(w, r)
return
}
defer f.Close()
http.ServeContent(w, r, path, serverStartTime, f.(io.ReadSeeker))
}
func static(w http.ResponseWriter, r *http.Request) {
serveStaticFile(w, r, strings.TrimPrefix(r.URL.Path, "/"))
}
func favicon(w http.ResponseWriter, r *http.Request) {
serveStaticFile(w, r, "static/favicon.ico")
}
func main() {
flag.Parse()
http.HandleFunc("GET /pong", pong)
http.HandleFunc("GET /static/", static)
http.HandleFunc("GET /favicon.ico", favicon)
http.HandleFunc("GET /{$}", index)
http.HandleFunc("GET /", notFound)
addr := fmt.Sprintf(":%d", *port)
log.Printf("Listening on %q", addr)
log.Fatal(http.ListenAndServe(addr, nil))
}
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