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go/doc/codelab/wiki/final-noerror.go
2010-09-30 13:19:33 +10:00

53 lines
1004 B
Go

package main
import (
"http"
"io/ioutil"
"os"
"template"
)
type page struct {
title string
body []byte
}
func (p *page) save() os.Error {
filename := p.title + ".txt"
return ioutil.WriteFile(filename, p.body, 0600)
}
func loadPage(title string) (*page, os.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}
}
t, _ := template.ParseFile("edit.html", nil)
t.Execute(p, w)
}
func viewHandler(w http.ResponseWriter, r *http.Request) {
title := r.URL.Path[lenPath:]
p, _ := loadPage(title)
t, _ := template.ParseFile("view.html", nil)
t.Execute(p, w)
}
func main() {
http.HandleFunc("/view/", viewHandler)
http.HandleFunc("/edit/", editHandler)
http.ListenAndServe(":8080", nil)
}