go语言web开发系列之十八:gin框架用base64Captcha生成图形验证码

一，安装库

1,库的地址

GitHub - mojocn/base64Captcha: captcha of base64 image string

2,安装:

liuhongdi@ku:~$ go get -u github.com/mojocn/base64Captcha

说明：刘宏缔的go森林是一个专注golang的博客，
网站：https://blog.imgtouch.com
原文: go语言web开发系列之十八:gin框架用base64Captcha生成图形验证码 – 架构森林

说明：作者:刘宏缔 邮箱: [email protected]

二，演示项目的相关信息

1,地址:

GitHub - liuhongdi/digv18: gin框架用base64Captcha生成图形验证码

2,功能说明：演示了用base64Captcha库生成图形验证码

3,项目结构：如图:

三，go代码说明

1，service/capt.go

package service

import (
	"fmt"
	"image/color"
	"github.com/mojocn/base64Captcha"
)

// 设置自带的store
var store = base64Captcha.DefaultMemStore

//生成验证码
func CaptMake() (id, b64s string, err error) {
	var driver base64Captcha.Driver
	var driverString base64Captcha.DriverString

	// 配置验证码信息
	captchaConfig := base64Captcha.DriverString{
		Height:          60,
		Width:           200,
		NoiseCount:      0,
		ShowLineOptions: 2 | 4,
		Length:          4,
		Source:          "1234567890qwertyuioplkjhgfdsazxcvbnm",
		BgColor: &color.RGBA{
			R: 3,
			G: 102,
			B: 214,
			A: 125,
		},
		Fonts: []string{"wqy-microhei.ttc"},
	}

	driverString = captchaConfig
	driver = driverString.ConvertFonts()
	captcha := base64Captcha.NewCaptcha(driver, store)
	lid, lb64s, lerr := captcha.Generate()
	return lid, lb64s, lerr
}

//验证captcha是否正确
func CaptVerify(id string,capt string) bool {
	fmt.Println("id:"+id)
	fmt.Println("capt:"+capt)
	//if store.Verify(id, capt, true) {
	if store.Verify(id, capt, false) {
		return true
	} else {
		return false
	}
	//return
}

2,controller/idController.go

package controller

import (
	"github.com/gin-gonic/gin"
	"github.com/liuhongdi/digv18/pkg/result"
	"github.com/liuhongdi/digv18/service"
	//"github.com/liuhongdi/digv18/service"
)

type IdController struct{}

func NewIdController() IdController {
	return IdController{}
}

//存储验证码的结构
type CaptchaResult struct {
	Id          string `json:"id"`
	Base64Blob  string `json:"base_64_blob"`
	//VerifyValue string `json:"code"`
}

// 生成图形化验证码
func (a *IdController) GetOne(ctx *gin.Context) {
	resultRes := result.NewResult(ctx)
	id, b64s, err := service.CaptMake()
	if err != nil {
		resultRes.Error(1,err.Error())
	}
	captchaResult := CaptchaResult{
		Id:         id,
		Base64Blob: b64s,
	}
	resultRes.Success(captchaResult)
    return
}

//验证captcha是否正确
func (a *IdController) Verify(c *gin.Context) {

	id := c.PostForm("id")
	capt := c.PostForm("capt")
	resultRes := result.NewResult(c)
	if (id == "" || capt == "") {
		resultRes.Error(400,"param error")
	}

	if service.CaptVerify(id, capt) == true {
		resultRes.Success("success")
	} else {
		resultRes.Error(1,"verify failed")
	}
	return
}

3,router/router.go

package router

import (
	"github.com/gin-gonic/gin"
	"github.com/liuhongdi/digv18/controller"
	"github.com/liuhongdi/digv18/global"
	"github.com/liuhongdi/digv18/pkg/result"
	"log"
	"net/http"
	"runtime/debug"
)

func Router() *gin.Engine {
	router := gin.Default()
	//处理异常
	router.NoRoute(HandleNotFound)
	router.NoMethod(HandleNotFound)
	router.Use(Recover)

	//static
	router.StaticFS("/static", http.Dir(global.StaticSetting.StaticDir))

	// 路径映射
	idc:=controller.NewIdController()
	router.GET("/id/getone", idc.GetOne);
	router.POST("/id/verify", idc.Verify);
	return router
}

//404
func HandleNotFound(c *gin.Context) {
	result.NewResult(c).Error(404,"资源未找到")
	return
}

//500
func Recover(c *gin.Context) {
	defer func() {
		if r := recover(); r != nil {
			//打印错误堆栈信息
			log.Printf("panic: %v\n", r)
			debug.PrintStack()
			result.NewResult(c).Error(500,"服务器内部错误")
		}
	}()
	//继续后续接口调用
	c.Next()
}

4,static/getcapt.html

5,其他相关代码可访问github查看

四，效果测试

1，访问:

http://127.0.0.1:8000/static/getcapt.html

返回:

2,测试错误返回：

3，测试正确返回:

五，查看库的版本:

module github.com/liuhongdi/digv18

go 1.15

require (
	github.com/gin-gonic/gin v1.6.3
	github.com/go-playground/universal-translator v0.17.0
	github.com/go-playground/validator/v10 v10.2.0
	github.com/mojocn/base64Captcha v1.3.1
	github.com/magiconair/properties v1.8.4 // indirect
	github.com/mitchellh/mapstructure v1.3.3 // indirect
	github.com/pelletier/go-toml v1.8.1 // indirect
	github.com/spf13/afero v1.4.1 // indirect
	github.com/spf13/cast v1.3.1 // indirect
	github.com/spf13/jwalterweatherman v1.1.0 // indirect
	github.com/spf13/pflag v1.0.5 // indirect
	github.com/spf13/viper v1.7.1
	golang.org/x/sys v0.0.0-20201119102817-f84b799fce68 // indirect
	golang.org/x/text v0.3.4 // indirect
	gopkg.in/ini.v1 v1.62.0 // indirect
	gopkg.in/yaml.v2 v2.3.0 // indirect
)