配置文件 config.ini
[global]
# machine id
expire=10
# startup port
port=8666
# redis config
redisAddr=localhost:6379用例:
// Copyright 2011 Dmitry Chestnykh. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
// example of HTTP server that uses the captcha package.
package main
import (
"encoding/json"
"fmt"
"io"
"log"
"net/http"
"strconv"
"text/template"
"time"
"captcha"
"github.com/zpatrick/go-config"
)
var formTemplate = template.Must(template.New("example").Parse(formTemplateSrc))
func showFormHandler(w http.ResponseWriter, r *http.Request) {
if r.URL.Path != "/" {
http.NotFound(w, r)
return
}
d := struct {
Id string
}{
captcha.New(),
}
if err := formTemplate.Execute(w, &d); err != nil {
http.Error(w, err.Error(), http.StatusInternalServerError)
}
}
func processFormHandler(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "text/html; charset=utf-8")
if !captcha.VerifyString(r.FormValue("id"), r.FormValue("captcha")) {
io.WriteString(w, "Wrong captcha solution! No robots allowed!\n")
} else {
io.WriteString(w, "Great job, human! You solved the captcha.\n")
}
io.WriteString(w, "<br><a href='/'>Try another one</a>")
}
//获取验证码id, /captcha/{{id}}.png获取到验证码
func getCaptchaFormHandler(w http.ResponseWriter, r *http.Request) {
lenStr := r.FormValue("len")
if lenStr == "" {
d := struct {
Code int
Data string
}{
0,
captcha.New(),
}
json.NewEncoder(w).Encode(d)
} else {
len, err := strconv.Atoi(lenStr)
if err != nil {
d := struct {
Code int
Data string
}{
1,
"获取验证码id失败",
}
json.NewEncoder(w).Encode(d)
return
}
d := struct {
Code int
Data string
}{
0,
captcha.NewLen(len),
}
json.NewEncoder(w).Encode(d)
}
}
//验证验证码
func verifyFormHandler(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "application/json; charset=utf-8")
if !captcha.VerifyString(r.FormValue("id"), r.FormValue("captcha")) {
result := struct {
Code int
Data string
}{
1,
"验证失败",
}
json.NewEncoder(w).Encode(result)
} else {
result := struct {
Code int
Data string
}{
0,
"验证成功",
}
json.NewEncoder(w).Encode(result)
}
}
func main() {
iniFile := config.NewINIFile("config.ini")
c := config.NewConfig([]config.Provider{iniFile})
if err := c.Load(); err != nil {
panic("load config error")
}
expire, err := c.Int("global.expire")
if err != nil {
panic("get expire config error")
}
port, err := c.Int("global.port")
if err != nil {
panic("get port config error")
}
redisAddr, err := c.String("global.redisAddr")
if err != nil {
panic("get redisaddr config error")
}
captcha.SetCustomStore(captcha.NewRedisStore(redisAddr, "", 0, time.Duration(expire)*time.Minute))
http.HandleFunc("/", showFormHandler)
http.HandleFunc("/process", processFormHandler)
http.HandleFunc("/v1/captcha_id", getCaptchaFormHandler)
http.HandleFunc("/v1/verify", verifyFormHandler)
http.Handle("/v1/captcha/", captcha.Server(captcha.StdWidth, captcha.StdHeight))
fmt.Println("Server is at :" + strconv.Itoa(port))
if err := http.ListenAndServe(":"+strconv.Itoa(port), nil); err != nil {
log.Fatal(err)
}
}
const formTemplateSrc = `<!doctype html>
<head><title>Captcha Example</title></head>
<body>
<script>
function setSrcQuery(e, q) {
var src = e.src;
var p = src.indexOf('?');
if (p >= 0) {
src = src.substr(0, p);
}
e.src = src + "?" + q
}
function playAudio() {
var le = document.getElementById("lang");
var lang = le.options[le.selectedIndex].value;
var e = document.getElementById('audio')
setSrcQuery(e, "lang=" + lang)
e.style.display = 'block';
e.autoplay = 'true';
return false;
}
function changeLang() {
var e = document.getElementById('audio')
if (e.style.display == 'block') {
playAudio();
}
}
function reload() {
setSrcQuery(document.getElementById('image'), "reload=" + (new Date()).getTime());
setSrcQuery(document.getElementById('audio'), (new Date()).getTime());
return false;
}
</script>
<select id="lang" onchange="changeLang()">
<option value="en">English</option>
<option value="ru">Russian</option>
<option value="zh">Chinese</option>
</select>
<form action="/process" method=post>
<p>Type the numbers you see in the picture below:</p>
<p><img id=image src="/captcha/{{.Id}}.png" alt="Captcha image"></p>
<a href="#" onclick="reload()">Reload</a> | <a href="#" onclick="playAudio()">Play Audio</a>
<audio id=audio controls style="display:none" src="/captcha/{{.Id}}.wav" preload=none>
You browser doesn't support audio.
<a href="/captcha/download/{{.Id}}.wav">Download file</a> to play it in the external player.
</audio>
<input type=hidden name=id value="{{.Id}}"><br>
<input name=captcha>
<input type=submit value=Submit>
</form>
`