1 // Copyright 2011 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 // This file contains the code snippets included in "Error Handling and Go." 6 7 package main 8 9 import ( 10 "net/http" 11 "text/template" 12 ) 13 14 func init() { 15 http.HandleFunc("/view", viewRecord) 16 } 17 18 func viewRecord(w http.ResponseWriter, r *http.Request) { 19 c := appengine.NewContext(r) 20 key := datastore.NewKey(c, "Record", r.FormValue("id"), 0, nil) 21 record := new(Record) 22 if err := datastore.Get(c, key, record); err != nil { 23 http.Error(w, err.Error(), 500) 24 return 25 } 26 if err := viewTemplate.Execute(w, record); err != nil { 27 http.Error(w, err.Error(), 500) 28 } 29 } 30 31 // STOP OMIT 32 33 type ap struct{} 34 35 func (ap) NewContext(*http.Request) *ctx { return nil } 36 37 type ctx struct{} 38 39 func (*ctx) Errorf(string, ...interface{}) {} 40 41 var appengine ap 42 43 type ds struct{} 44 45 func (ds) NewKey(*ctx, string, string, int, *int) string { return "" } 46 func (ds) Get(*ctx, string, *Record) error { return nil } 47 48 var datastore ds 49 50 type Record struct{} 51 52 var viewTemplate *template.Template 53 54 func main() {} 55
