1 // Copyright 2010 The Go Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style 3 // license that can be found in the LICENSE file. 4 5 package main 6 7 import ( 8 "html/template" 9 "io/ioutil" 10 "net/http" 11 ) 12 13 type Page struct { 14 Title string 15 Body []byte 16 } 17 18 func (p *Page) save() error { 19 filename := p.Title + ".txt" 20 return ioutil.WriteFile(filename, p.Body, 0600) 21 } 22 23 func loadPage(title string) (*Page, error) { 24 filename := title + ".txt" 25 body, err := ioutil.ReadFile(filename) 26 if err != nil { 27 return nil, err 28 } 29 return &Page{Title: title, Body: body}, nil 30 } 31 32 func editHandler(w http.ResponseWriter, r *http.Request) { 33 title := r.URL.Path[len("/edit/"):] 34 p, err := loadPage(title) 35 if err != nil { 36 p = &Page{Title: title} 37 } 38 renderTemplate(w, "edit", p) 39 } 40 41 func viewHandler(w http.ResponseWriter, r *http.Request) { 42 title := r.URL.Path[len("/view/"):] 43 p, _ := loadPage(title) 44 renderTemplate(w, "view", p) 45 } 46 47 func saveHandler(w http.ResponseWriter, r *http.Request) { 48 title := r.URL.Path[len("/save/"):] 49 body := r.FormValue("body") 50 p := &Page{Title: title, Body: []byte(body)} 51 p.save() 52 http.Redirect(w, r, "/view/"+title, http.StatusFound) 53 } 54 55 func renderTemplate(w http.ResponseWriter, tmpl string, p *Page) { 56 t, _ := template.ParseFiles(tmpl + ".html") 57 t.Execute(w, p) 58 } 59 60 func main() { 61 http.HandleFunc("/view/", viewHandler) 62 http.HandleFunc("/edit/", editHandler) 63 http.HandleFunc("/save/", saveHandler) 64 http.ListenAndServe(":8080", nil) 65 } 66
