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@ -19,6 +19,7 @@ package captcha |
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import ( |
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"fmt" |
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"html/template" |
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"image/color" |
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"path" |
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"strings" |
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@ -49,6 +50,7 @@ type Captcha struct { |
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ChallengeNums int |
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Expiration int64 |
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CachePrefix string |
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ColorPalette color.Palette |
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} |
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// generate key string
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@ -61,16 +63,21 @@ func (c *Captcha) genRandChars() string { |
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return string(com.RandomCreateBytes(c.ChallengeNums, defaultChars...)) |
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} |
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// tempalte func for output html
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func (c *Captcha) CreateHtml() template.HTML { |
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// CreateHTML outputs HTML for display and fetch new captcha images.
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func (c *Captcha) CreateHTML() template.HTML { |
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value, err := c.CreateCaptcha() |
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if err != nil { |
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panic(fmt.Errorf("fail to create captcha: %v", err)) |
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} |
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return template.HTML(fmt.Sprintf(`<input type="hidden" name="%s" value="%s"> |
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<a class="captcha" href="javascript:"> |
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<img onclick="this.src=('%s%s%s.png?reload='+(new Date()).getTime())" class="captcha-img" src="%s%s%s.png"> |
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</a>`, c.FieldIdName, value, c.SubURL, c.URLPrefix, value, c.SubURL, c.URLPrefix, value)) |
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return template.HTML(fmt.Sprintf(`<input type="hidden" name="%[1]s" value="%[2]s"> |
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<a class="captcha" href="javascript:" tabindex="-1"> |
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<img onclick="this.src=('%[3]s%[4]s%[2]s.png?reload='+(new Date()).getTime())" class="captcha-img" src="%[3]s%[4]s%[2]s.png"> |
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</a>`, c.FieldIdName, value, c.SubURL, c.URLPrefix)) |
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} |
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// DEPRECATED
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func (c *Captcha) CreateHtml() template.HTML { |
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return c.CreateHTML() |
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} |
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// create a new captcha id
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@ -139,6 +146,9 @@ type Options struct { |
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Expiration int64 |
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// Cache key prefix captcha characters. Default is "captcha_".
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CachePrefix string |
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// ColorPalette holds a collection of primary colors used for
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// the captcha's text. If not defined, a random color will be generated.
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ColorPalette color.Palette |
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} |
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func prepareOptions(options []Options) Options { |
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@ -192,6 +202,7 @@ func NewCaptcha(opt Options) *Captcha { |
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ChallengeNums: opt.ChallengeNums, |
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Expiration: opt.Expiration, |
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CachePrefix: opt.CachePrefix, |
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ColorPalette: opt.ColorPalette, |
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} |
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} |
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@ -229,9 +240,10 @@ func Captchaer(options ...Options) macaron.Handler { |
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} |
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} |
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if _, err := NewImage([]byte(chars), cpt.StdWidth, cpt.StdHeight).WriteTo(ctx.Resp); err != nil { |
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if _, err := NewImage([]byte(chars), cpt.StdWidth, cpt.StdHeight, cpt.ColorPalette).WriteTo(ctx.Resp); err != nil { |
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panic(fmt.Errorf("write captcha: %v", err)) |
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} |
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ctx.Status(200) |
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return |
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} |
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Lunny Xiao
5 years ago
committed by
GitHub