https://github.com/lifei6671/gocaptcha

一个Golang实现的验证码生成库。支持自定义字体文字，支持增加干扰性，扭曲字体等。
https://github.com/lifei6671/gocaptcha

captcha golang image

Last synced: about 2 months ago
JSON representation

一个Golang实现的验证码生成库。支持自定义字体文字，支持增加干扰性，扭曲字体等。

• Host: GitHub
• URL: https://github.com/lifei6671/gocaptcha
• Owner: lifei6671
• License: apache-2.0
• Created: 2016-06-03T09:38:21.000Z (about 9 years ago)
• Default Branch: master
• Last Pushed: 2024-11-20T10:54:27.000Z (7 months ago)
• Last Synced: 2024-11-20T12:15:15.328Z (7 months ago)
• Topics: captcha, golang, image
• Language: Go
• Homepage:
• Size: 3.72 MB
• Stars: 182
• Watchers: 10
• Forks: 61
• Open Issues: 3
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

• go-awesome - gocaptcha - verification code generation (Open source library / Graphics Processing)

README

        
# gocaptcha

一个简单的Go语言实现的验证码

### 图片实例

![image](https://raw.githubusercontent.com/lifei6671/gocaptcha/master/example/image_1.jpg)

![image](https://raw.githubusercontent.com/lifei6671/gocaptcha/master/example/image_2.jpg)

![image](https://raw.githubusercontent.com/lifei6671/gocaptcha/master/example/image_3.jpg)

![image](https://raw.githubusercontent.com/lifei6671/gocaptcha/master/example/image_4.jpg)

## 简介

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。

## 实例

#### 使用：

```

	go get github.com/lifei6671/gocaptcha

```

#### 使用的类库

```

	go get github.com/golang/freetype

	go get github.com/golang/freetype/truetype

	go get golang.org/x/image

```

#### 代码

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)

	}

}

```