https://pkg.go.dev/github.com/dchest/captcha#section-readme

    1. package main
    3. import (
    4.     "fmt"
    5.     "github.com/dchest/captcha"
    6.     "github.com/gin-gonic/gin"
    7.     "github.com/gorilla/sessions"
    8. )
    10. var store = sessions.NewCookieStore([]byte("session"))
    12. func main() {
    13.     r := gin.Default()
    14.     r.GET("/cookie", func(this *gin.Context) {
    15.         this.SetCookie("name", "zhangsan", 60*60*24, "/", "", false, true)
    16.         this.JSON(200, gin.H{"cookie": true})
    17.     })
    19.     r.GET("/session", func(this *gin.Context) {
    21.         session, _ := store.Get(this.Request, "session-name")
    22.         session.Values["captcha"] = "9safji3w9jsal"
    23.         session.Save(this.Request, this.Writer)
    24.         this.JSON(200, gin.H{"session": true})
    25.     })
    27.     r.GET("/captcha", GetCaptcha)
    29.     r.GET("/captcha/verify/:value", CaptchaVerify)
    31.     r.Run(":8090")
    32. }
    34. func GetCaptcha(this *gin.Context) {
    35.     l := 4
    36.     w, h := 214, 72
    37.     captchaId := captcha.NewLen(l)
    38.     session, _ := store.Get(this.Request, "session-name")
    39.     session.Values["captcha"] = captchaId
    40.     session.Save(this.Request, this.Writer)
    41.     captcha.WriteImage(this.Writer, captchaId, w, h)
    42. }
    44. func CaptchaVerify(this *gin.Context) {
    45.     session, _ := store.Get(this.Request, "session-name")
    46.     captchaId := session.Values["captcha"]
    47.     fmt.Println(captchaId)
    48.     if captcha.VerifyString(captchaId.(string), this.Param("value")) {
    49.         session.Values["captcha"] = ""
    50.         this.JSON(200, gin.H{"value": this.Param("value")})
    51.     }else {
    52.         this.JSON(201, gin.H{"value": false})
    53.     }
    54. }