mirror of
https://github.com/astaxie/beego.git
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97 lines
2.3 KiB
Go
97 lines
2.3 KiB
Go
// Copyright 2011 Google Inc. All rights reserved.
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// Use of this source code is governed by the Apache 2.0
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// license that can be found in the LICENSE file.
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package guestbook
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import (
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"io"
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"net/http"
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"text/template"
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"time"
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"appengine"
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"appengine/datastore"
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"appengine/user"
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)
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type Greeting struct {
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Author string
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Content string
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Date time.Time
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}
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func serve404(w http.ResponseWriter) {
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w.WriteHeader(http.StatusNotFound)
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w.Header().Set("Content-Type", "text/plain; charset=utf-8")
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io.WriteString(w, "Not Found")
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}
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func serveError(c appengine.Context, w http.ResponseWriter, err error) {
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w.WriteHeader(http.StatusInternalServerError)
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w.Header().Set("Content-Type", "text/plain; charset=utf-8")
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io.WriteString(w, "Internal Server Error")
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c.Errorf("%v", err)
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}
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var mainPage = template.Must(template.New("guestbook").Parse(
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`<html><body>
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{{range .}}
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{{with .Author}}<b>{{.|html}}</b>{{else}}An anonymous person{{end}}
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on <em>{{.Date.Format "3:04pm, Mon 2 Jan"}}</em>
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wrote <blockquote>{{.Content|html}}</blockquote>
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{{end}}
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<form action="/sign" method="post">
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<div><textarea name="content" rows="3" cols="60"></textarea></div>
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<div><input type="submit" value="Sign Guestbook"></div>
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</form></body></html>
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`))
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func handleMainPage(w http.ResponseWriter, r *http.Request) {
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if r.Method != "GET" || r.URL.Path != "/" {
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serve404(w)
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return
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}
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c := appengine.NewContext(r)
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q := datastore.NewQuery("Greeting").Order("-Date").Limit(10)
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var gg []*Greeting
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_, err := q.GetAll(c, &gg)
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if err != nil {
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serveError(c, w, err)
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return
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}
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w.Header().Set("Content-Type", "text/html; charset=utf-8")
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if err := mainPage.Execute(w, gg); err != nil {
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c.Errorf("%v", err)
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}
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}
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func handleSign(w http.ResponseWriter, r *http.Request) {
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if r.Method != "POST" {
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serve404(w)
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return
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}
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c := appengine.NewContext(r)
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if err := r.ParseForm(); err != nil {
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serveError(c, w, err)
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return
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}
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g := &Greeting{
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Content: r.FormValue("content"),
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Date: time.Now(),
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}
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if u := user.Current(c); u != nil {
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g.Author = u.String()
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}
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if _, err := datastore.Put(c, datastore.NewIncompleteKey(c, "Greeting", nil), g); err != nil {
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serveError(c, w, err)
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return
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}
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http.Redirect(w, r, "/", http.StatusFound)
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}
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func init() {
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http.HandleFunc("/", handleMainPage)
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http.HandleFunc("/sign", handleSign)
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}
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