图形验证码 captcha的使用

使用效果：

使用说明：

1、点击图片 或者 点击看不清 换一张，会自动更换。

  2、输入错误，也会自动再更换一张。确保安全

验证码文件：common/captcha.go 

package common

import (
	"github.com/gin-gonic/gin"
	"github.com/go-playground/validator/v10"
	"github.com/mojocn/base64Captcha"
	"image/color"
	"net/http"
)

var store = base64Captcha.DefaultMemStore
// 获取验证码
func GetCaptcha(c *gin.Context) {
	//配置验证码
	driverString := base64Captcha.DriverString{
		Height:          60,
		Width:           200,
		NoiseCount:      0,     //噪点数
		ShowLineOptions: 2 | 4, //干扰线
		Length:          4,
		Source:          "123456789abcdefghijklmnopqrstuvwxwz",
		BgColor: &color.RGBA{
			R: 100,
			G: 100,
			B: 100,
			A: 100,
		},
		Fonts: []string{"wqy-microhei.ttc"},
	}

	var driver base64Captcha.Driver = driverString.ConvertFonts()
	//生成验证码
	cap := base64Captcha.NewCaptcha(driver, store)
	id, b64s, err := cap.Generate()
	body := map[string]interface{}{"code": 1, "data": b64s, "captchaId": id, "msg": "success"}
	if err != nil {
		body = map[string]interface{}{"code": 0, "msg": err.Error()}
	}
	c.JSON(http.StatusOK, body)
}

// 自定义验证码的验证器
func VerifyCaptcha(f validator.FieldLevel) bool {
	captcha := f.Parent().FieldByName("Captcha").Interface().(string)
	captcha_id := f.Parent().FieldByName("CaptchaId").Interface().(string)

	if store.Verify(captcha_id, captcha, true) {
		return true
	}
	return false
}

Html调用代码：

<div class="row cl">
<div class="formControls col-xs-8 col-xs-offset-3">
<input name="captcha" id="captcha" class="input-text size-L" type="text" placeholder="验证码" onblur="if(this.value==''){this.value='验证码:'}" onclick="if(this.value=='验证码:'){this.value='';}" value="验证码:" style="width:150px;">
<img id="captcha_img" src="/admin/getCaptcha" onclick="showCaptcha()" style="width: 120px">
 <input type="hidden" name="captcha_id" id="captcha_id" />
<a id="kanbuq" href="javascript:showCaptcha();">看不清，换一张</a>
</div>
 </div>


<script type="text/javascript" src="/static/h-ui.lib/jquery/1.9.1/jquery.min.js"></script>
<script type="text/javascript" >
//显示验证码
    function showCaptcha(){
        $.get("/admin/getCaptcha",function (res){
            $("#captcha_img").attr("src",res.data)
            $("#captcha_id").val(res.captchaId)

        })
    }
showCaptcha()
</script>

　　完结