Captcha

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Captcha
Middleware captcha provides captcha service for Macaron Instances.
​GitHub​
​API Reference​
Installation
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go get github.com/go-macaron/captcha
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Usage
To use this middleware, you have to register cache first.
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// main.go
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import (
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    "github.com/go-macaron/cache"
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    "github.com/go-macaron/captcha"
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    "gopkg.in/macaron.v1"
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)
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​
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func main() {
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    m := macaron.Classic()
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    m.Use(cache.Cacher())
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    m.Use(captcha.Captchaer())
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​
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    m.Get("/", func(ctx *macaron.Context, cpt *captcha.Captcha) string {
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        if cpt.VerifyReq(ctx.Req) {
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            return "valid captcha"
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        }
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        return "invalid captcha"
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    })
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​
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    m.Run()
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}
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<!-- templates/hello.tmpl -->
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{{.Captcha.CreateHtml}}
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Options
captcha.Captchaer comes with a variety of configuration options:
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// ...
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m.Use(captcha.Captchaer(captcha.Options{
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    // URL prefix of getting captcha pictures. Default is "/captcha/".
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    URLPrefix:            "/captcha/",
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    // Hidden input element ID. Default is "captcha_id".
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    FieldIdName:        "captcha_id",
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    // User input value element name in request form. Default is "captcha".
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    FieldCaptchaName:    "captcha",
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    // Challenge number. Default is 6.
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    ChallengeNums:        6,
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    // Captcha image width. Default is 240.
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    Width:                240,
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    // Captcha image height. Default is 80.
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    Height:                80,
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    // Captcha expiration time in seconds. Default is 600.
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    Expiration:            600,
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    // Cache key prefix captcha characters. Default is "captcha_".
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    CachePrefix:        "captcha_",
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}))
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// ...
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Cache
Session
Last modified 2yr ago
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Contents
Installation
Usage
Options