Source file doc/articles/wiki/part3.go

Documentation: doc/articles/wiki

  // Copyright 2010 The Go Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style
  // license that can be found in the LICENSE file.
  
  package main
  
  import (
  	"html/template"
  	"io/ioutil"
  	"log"
  	"net/http"
  )
  
  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
  }
  
  func renderTemplate(w http.ResponseWriter, tmpl string, p *Page) {
  	t, _ := template.ParseFiles(tmpl + ".html")
  	t.Execute(w, p)
  }
  
  func viewHandler(w http.ResponseWriter, r *http.Request) {
  	title := r.URL.Path[len("/view/"):]
  	p, _ := loadPage(title)
  	renderTemplate(w, "view", p)
  }
  
  func editHandler(w http.ResponseWriter, r *http.Request) {
  	title := r.URL.Path[len("/edit/"):]
  	p, err := loadPage(title)
  	if err != nil {
  		p = &Page{Title: title}
  	}
  	renderTemplate(w, "edit", p)
  }
  
  func main() {
  	http.HandleFunc("/view/", viewHandler)
  	http.HandleFunc("/edit/", editHandler)
  	//http.HandleFunc("/save/", saveHandler)
  	log.Fatal(http.ListenAndServe(":8080", nil))
  }
  

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