package main import ( "context" "fmt" "html/template" "net/http" "time" "github.com/Xe/ln" ) func logTemplateTime(name string, from time.Time) { now := time.Now() ln.Log(context.Background(), ln.F{"action": "template_rendered", "dur": now.Sub(from).String(), "name": name}) } func (s *Site) renderTemplatePage(templateFname string, data interface{}) http.Handler { return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { defer logTemplateTime(templateFname, time.Now()) s.tlock.RLock() defer s.tlock.RUnlock() var t *template.Template var err error if s.templates[templateFname] == nil { t, err = template.ParseFiles("templates/base.html", "templates/"+templateFname) if err != nil { w.WriteHeader(http.StatusInternalServerError) ln.Error(context.Background(), err, ln.F{"action": "renderTemplatePage", "page": templateFname}) fmt.Fprintf(w, "error: %v", err) } ln.Log(context.Background(), ln.F{"action": "loaded_new_template", "fname": templateFname}) s.tlock.RUnlock() s.tlock.Lock() s.templates[templateFname] = t s.tlock.Unlock() s.tlock.RLock() } else { t = s.templates[templateFname] } err = t.Execute(w, data) if err != nil { panic(err) } }) } func (s *Site) showPost(w http.ResponseWriter, r *http.Request) { if r.RequestURI == "/blog/" { http.Redirect(w, r, "/blog", http.StatusSeeOther) return } cmp := r.URL.Path[1:] var p *Post for _, pst := range s.Posts { if pst.Link == cmp { p = pst } } if p == nil { w.WriteHeader(http.StatusNotFound) s.renderTemplatePage("error.html", "no such post found: "+r.RequestURI).ServeHTTP(w, r) return } s.renderTemplatePage("blogpost.html", p).ServeHTTP(w, r) }