modify

2025-06-14 02:50:41 +00:00 · 2012-03-26 23:18:16 +08:00
parent 3e8871370a
commit 446daaea37
7 changed files with 313 additions and 3 deletions
--- a/examples/blog/blog.go
+++ b/examples/blog/blog.go
@ -0,0 +1,96 @@
+// Copyright 2011 Google Inc. All rights reserved.
+// Use of this source code is governed by the Apache 2.0
+// license that can be found in the LICENSE file.
+
+package guestbook
+
+import (
+	"io"
+	"net/http"
+	"text/template"
+	"time"
+
+	"appengine"
+	"appengine/datastore"
+	"appengine/user"
+)
+
+type Greeting struct {
+	Author  string
+	Content string
+	Date    time.Time
+}
+
+func serve404(w http.ResponseWriter) {
+	w.WriteHeader(http.StatusNotFound)
+	w.Header().Set("Content-Type", "text/plain; charset=utf-8")
+	io.WriteString(w, "Not Found")
+}
+
+func serveError(c appengine.Context, w http.ResponseWriter, err error) {
+	w.WriteHeader(http.StatusInternalServerError)
+	w.Header().Set("Content-Type", "text/plain; charset=utf-8")
+	io.WriteString(w, "Internal Server Error")
+	c.Errorf("%v", err)
+}
+
+var mainPage = template.Must(template.New("guestbook").Parse(
+	`<html><body>
+{{range .}}
+{{with .Author}}<b>{{.|html}}</b>{{else}}An anonymous person{{end}}
+on <em>{{.Date.Format "3:04pm, Mon 2 Jan"}}</em>
+wrote <blockquote>{{.Content|html}}</blockquote>
+{{end}}
+<form action="/sign" method="post">
+<div><textarea name="content" rows="3" cols="60"></textarea></div>
+<div><input type="submit" value="Sign Guestbook"></div>
+</form></body></html>
+`))
+
+func handleMainPage(w http.ResponseWriter, r *http.Request) {
+	if r.Method != "GET" || r.URL.Path != "/" {
+		serve404(w)
+		return
+	}
+	c := appengine.NewContext(r)
+	q := datastore.NewQuery("Greeting").Order("-Date").Limit(10)
+	var gg []*Greeting
+	_, err := q.GetAll(c, &gg)
+	if err != nil {
+		serveError(c, w, err)
+		return
+	}
+	w.Header().Set("Content-Type", "text/html; charset=utf-8")
+	if err := mainPage.Execute(w, gg); err != nil {
+		c.Errorf("%v", err)
+	}
+}
+
+func handleSign(w http.ResponseWriter, r *http.Request) {
+	if r.Method != "POST" {
+		serve404(w)
+		return
+	}
+	c := appengine.NewContext(r)
+	if err := r.ParseForm(); err != nil {
+		serveError(c, w, err)
+		return
+	}
+	g := &Greeting{
+		Content: r.FormValue("content"),
+		Date:    time.Now(),
+	}
+	if u := user.Current(c); u != nil {
+		g.Author = u.String()
+	}
+	if _, err := datastore.Put(c, datastore.NewIncompleteKey(c, "Greeting", nil), g); err != nil {
+		serveError(c, w, err)
+		return
+	}
+	http.Redirect(w, r, "/", http.StatusFound)
+}
+
+func init() {
+	http.HandleFunc("/", handleMainPage)
+	http.HandleFunc("/sign", handleSign)
+}
--- a/examples/blog/configs/app.yaml
+++ b/examples/blog/configs/app.yaml
@ -0,0 +1,3 @@
+application: guestbook-go
+handlers:
+- url: /.*