mirror of https://github.com/mindoc-org/mindoc.git
66 lines
1.8 KiB
Markdown
66 lines
1.8 KiB
Markdown
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# gocaptcha
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一个简单的Go语言实现的验证码
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##图片实例
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##简介
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基于Golang实现的图片验证码生成库，可以实现随机字母个数，随机直线，随机噪点等。可以设置任意多字体，每个验证码随机选一种字体展示。
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##实例
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####使用：
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```
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go get github.com/lifei6671/gocaptcha/
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```
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####使用的类库
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```
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go get github.com/golang/freetype
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go get github.com/golang/freetype/truetype
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go get golang.org/x/image
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```
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天朝可以去 http://www.golangtc.com/download/package 或 https://gopm.io 下载
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####代码
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具体实例可以查看example目录，有生成的验证码图片。
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```
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func Get(w http.ResponseWriter, r *http.Request) {
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//初始化一个验证码对象
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captchaImage,err := gocaptcha.NewCaptchaImage(dx,dy,gocaptcha.RandLightColor());
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//画上三条随机直线
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captchaImage.Drawline(3);
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//画边框
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captchaImage.DrawBorder(gocaptcha.ColorToRGB(0x17A7A7A));
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//画随机噪点
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captchaImage.DrawNoise(gocaptcha.CaptchaComplexHigh);
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//画随机文字噪点
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captchaImage.DrawTextNoise(gocaptcha.CaptchaComplexLower);
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//画验证码文字，可以预先保持到Session种或其他储存容器种
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captchaImage.DrawText(gocaptcha.RandText(4));
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if err != nil {
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fmt.Println(err)
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}
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//将验证码保持到输出流种，可以是文件或HTTP流等
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captchaImage.SaveImage(w,gocaptcha.ImageFormatJpeg);
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}
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```
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