package main import ( "io/ioutil" "net/http" "text/template" ) type Page struct { Title string Body []byte } func (p *Page) save() error { filename := p.Title + ".txt" return ioutil.WriteFile(filename, p.Body, 0600) } func loadPage(title string) (*Page, error) { filename := title + ".txt" body, err := ioutil.ReadFile(filename) if err != nil { return nil, err } return &Page{Title: title, Body: body}, nil } const lenPath = len("/view/") func editHandler(w http.ResponseWriter, r *http.Request) { title := r.URL.Path[lenPath:] p, err := loadPage(title) if err != nil { p = &Page{Title: title} } renderTemplate(w, "edit", p) } func viewHandler(w http.ResponseWriter, r *http.Request) { title := r.URL.Path[lenPath:] p, _ := loadPage(title) renderTemplate(w, "view", p) } func saveHandler(w http.ResponseWriter, r *http.Request) { title := r.URL.Path[lenPath:] body := r.FormValue("body") p := &Page{Title: title, Body: []byte(body)} p.save() http.Redirect(w, r, "/view/"+title, http.StatusFound) } func renderTemplate(w http.ResponseWriter, tmpl string, p *Page) { t, _ := template.ParseFile(tmpl+".html", nil) t.Execute(w, p) } func main() { http.HandleFunc("/view/", viewHandler) http.HandleFunc("/edit/", editHandler) http.HandleFunc("/save/", saveHandler) http.ListenAndServe(":8080", nil) }