зеркало из https://github.com/golang/example.git
helloserver: add basic hello world web server
We want to revive golang.org/x/example as a test case for an experiment with a 'gonew' command. This CL adds a basic "hello, world" web server as golang.org/x/example/helloserver. Change-Id: Icf76c756f7b256285d4c5e6a33655996597eb2da Reviewed-on: https://go-review.googlesource.com/c/example/+/513997 Auto-Submit: Russ Cox <rsc@golang.org> TryBot-Result: Gopher Robot <gobot@golang.org> Run-TryBot: Russ Cox <rsc@golang.org> Reviewed-by: Cameron Balahan <cbalahan@google.com>
This commit is contained in:
Родитель
1bcfdd08c5
Коммит
3dc2413024
|
@ -0,0 +1,4 @@
|
|||
module golang.org/x/example/helloserver
|
||||
|
||||
go 1.19
|
||||
|
|
@ -0,0 +1,75 @@
|
|||
// Copyright 2023 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.
|
||||
|
||||
// Hello is a simple hello, world demonstration web server.
|
||||
//
|
||||
// It serves version information on /version and answers
|
||||
// any other request like /name by saying "Hello, name!".
|
||||
//
|
||||
// See golang.org/x/example/outyet for a more sophisticated server.
|
||||
package main
|
||||
|
||||
import (
|
||||
"flag"
|
||||
"fmt"
|
||||
"html"
|
||||
"log"
|
||||
"net/http"
|
||||
"os"
|
||||
"runtime/debug"
|
||||
"strings"
|
||||
)
|
||||
|
||||
func usage() {
|
||||
fmt.Fprintf(os.Stderr, "usage: helloserver [options]\n")
|
||||
flag.PrintDefaults()
|
||||
os.Exit(2)
|
||||
}
|
||||
|
||||
var (
|
||||
greeting = flag.String("g", "Hello", "Greet with `greeting`")
|
||||
addr = flag.String("addr", "localhost:8080", "address to serve")
|
||||
)
|
||||
|
||||
func main() {
|
||||
// Parse flags.
|
||||
flag.Usage = usage
|
||||
flag.Parse()
|
||||
|
||||
// Parse and validate arguments (none).
|
||||
args := flag.Args()
|
||||
if len(args) != 0 {
|
||||
usage()
|
||||
}
|
||||
|
||||
// Register handlers.
|
||||
// All requests not otherwise mapped with go to greet.
|
||||
// /version is mapped specifically to version.
|
||||
http.HandleFunc("/", greet)
|
||||
http.HandleFunc("/version", version)
|
||||
|
||||
log.Printf("serving http://%s\n", *addr)
|
||||
log.Fatal(http.ListenAndServe(*addr, nil))
|
||||
}
|
||||
|
||||
func version(w http.ResponseWriter, r *http.Request) {
|
||||
info, ok := debug.ReadBuildInfo()
|
||||
if !ok {
|
||||
http.Error(w, "no build information available", 500)
|
||||
return
|
||||
}
|
||||
|
||||
fmt.Fprintf(w, "<!DOCTYPE html>\n<pre>\n")
|
||||
fmt.Fprintf(w, "%s\n", html.EscapeString(info.String()))
|
||||
}
|
||||
|
||||
func greet(w http.ResponseWriter, r *http.Request) {
|
||||
name := strings.Trim(r.URL.Path, "/")
|
||||
if name == "" {
|
||||
name = "Gopher"
|
||||
}
|
||||
|
||||
fmt.Fprintf(w, "<!DOCTYPE html>\n")
|
||||
fmt.Fprintf(w, "Hello, %s!\n", html.EscapeString(name))
|
||||
}
|
Загрузка…
Ссылка в новой задаче