验证码中间件

  3. import (
  4.     "github.com/lunny/tango"
  5.     "github.com/tango-contrib/captcha"
  6.     "github.com/tango-contrib/renders"
  7. )
  9. type CaptchaAction struct {
  10.     captcha.Captcha
  11.     renders.Renderer
  12. }
  14. func (c *CaptchaAction) Get() error {
  15.     return c.Render("captcha.html", renders.T{
  16.         "captcha": c.CreateHtml(),
  17.     })
  18. }
  20. func (c *CaptchaAction) Post() string {
  21.     if c.Verify() {
  22.         return "true"
  23.     }
  24.     return "false"
  25. }
  27. func main() {
  28.     t := tango.Classic()
  29.     t.Use(captcha.New(), renders.New())
  30.     t.Any("/", new(CaptchaAction))
  31.     t.Run()
  32. }

默认的验证码是保存在内存中，并保留120秒，当然也可以自定义：

  1. package main
  3. import (
  4.     "github.com/tango-contrib/cache"
  5.     _ "github.com/tango-contrib/cache-redis"
  7.     "github.com/tango-contrib/renders"
  8. )
  10. type CaptchaAction struct {
  11.     captcha.Captcha
  12.     renders.Renderer
  13. }
  15. func (c *CaptchaAction) Get() error {
  16.     return c.Render("captcha.html", renders.T{
  17.         "captcha": c.CreateHtml(),
  18.     })
  19. }
  21. func (c *CaptchaAction) Post() string {
  22.     if c.Verify() {
  23.         return "true"
  24.     }
  25.     return "false"
  26. }
  28. func main() {
  29.     t := tango.Classic()
  30.     c := cache.New(cache.Options{
  31.         Adapter:       "redis",
  32.         AdapterConfig: "addr=:6379,prefix=cache:",
  33.     })
  34.     t.Use(renders.New(), captcha.New(captcha.Options{Caches: c}))
  35.     t.Any("/", new(CaptchaAction))
  36.     t.Run()
  37. }

Go的模板如下

  1. package main
  3. import (
  4.     "github.com/lunny/tango"
  5.     "github.com/tango-contrib/tpongo2"
  8. type CaptchaAction struct {
  9.     captcha.Captcha
  10.     tpongo2.Renderer
  11. }
  13. func (c *CaptchaAction) Get() error {
  14.     return c.Render("captcha_pongo.html", tpongo2.T{
  15.         "captcha": c.CreateHtml(),
  16.     })
  17. }
  19. func (c *CaptchaAction) Post() string {
  20.     if c.Verify() {
  21.         return "true"
  22.     }
  23.     return "false"
  24. }
  26. func main() {
  27.     t := tango.Classic()
  28.     t.Use(tpongo2.New(), captcha.New())
  29.     t.Any("/", new(CaptchaAction))
  30.     t.Run()
  31. }

Pongo2的模板如下

选项

  1. // ...
  2. t.Use(captcha.New(captcha.Options{
  3.     Caches: cache, // 使用哪种Cache进行验证码数字的存储
  4.     URLPrefix:            "/captcha/",     // URL prefix of getting captcha pictures.
  5.     FieldIdName:        "captcha_id",     // Hidden input element ID.
  6.     FieldCaptchaName:    "captcha",         // User input value element name in request form.
  7.     ChallengeNums:        6,                 // Challenge number.
  8.     Width:                240,            // Captcha image width.
  9.     Height:                80,                // Captcha image height.
  10.     Expiration:            600,             // Captcha expiration time in seconds.
  11.     CachePrefix:        "captcha_",     // Cache key prefix captcha characters.
  12. // ...