| // Copyright 2018 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 http_test | |
| import ( | |
| "fmt" | |
| "log" | |
| "net/http" | |
| "sync" | |
| ) | |
| type countHandler struct { | |
| mu sync.Mutex // guards n | |
| n int | |
| } | |
| func (h *countHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) { | |
| h.mu.Lock() | |
| defer h.mu.Unlock() | |
| h.n++ | |
| fmt.Fprintf(w, "count is %d\n", h.n) | |
| } | |
| func ExampleHandle() { | |
| http.Handle("/count", new(countHandler)) | |
| log.Fatal(http.ListenAndServe(":8080", nil)) | |
| } | |