一个简单的Go语言实现的验证码
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。
go get github.com/lifei6671/gocaptcha
go get github.com/golang/freetype
go get github.com/golang/freetype/truetype
go get golang.org/x/image
具体实例可以查看example目录，有生成的验证码图片。
func Get(w http.ResponseWriter, r *http.Request) {
captchaImage := gocaptcha.New(dx, dy, gocaptcha.RandLightColor())
err := captchaImage.
DrawBorder(gocaptcha.RandDeepColor()).
DrawNoise(gocaptcha.NoiseDensityHigh, gocaptcha.NewTextNoiseDrawer(gocaptcha.DefaultDPI)).
DrawNoise(gocaptcha.NoiseDensityLower, gocaptcha.NewPointNoiseDrawer()).
DrawLine(gocaptcha.NewBezier3DLine(), gocaptcha.RandDeepColor()).
DrawText(gocaptcha.NewTwistTextDrawer(gocaptcha.DefaultDPI, gocaptcha.DefaultAmplitude, gocaptcha.DefaultFrequency), gocaptcha.RandText(4)).
DrawLine(gocaptcha.NewBeeline(), gocaptcha.RandDeepColor()).
//DrawLine(gocaptcha.NewHollowLine(), gocaptcha.RandLightColor()).
DrawBlur(gocaptcha.NewGaussianBlur(), gocaptcha.DefaultBlurKernelSize, gocaptcha.DefaultBlurSigma).
Error
if err != nil {
fmt.Println(err)
}
_ = captchaImage.Encode(w, gocaptcha.ImageFormatJpeg)
}
// 初始化字体
func init() {
err := gocaptcha.SetFontPath("../fonts/")
if err != nil {
panic(err)
}
}
