https://github.com/lifei6671/gocaptcha

A captcha library written in golang
https://github.com/lifei6671/gocaptcha

captcha golang image

Last synced: 11 days ago
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A captcha library written in golang

• Host: GitHub
• URL: https://github.com/lifei6671/gocaptcha
• Owner: lifei6671
• License: apache-2.0
• Created: 2016-06-03T09:38:21.000Z (about 8 years ago)
• Default Branch: master
• Last Pushed: 2021-04-02T11:50:42.000Z (about 3 years ago)
• Last Synced: 2024-02-21T21:35:48.493Z (4 months ago)
• Topics: captcha, golang, image
• Language: Go
• Homepage:
• Size: 3.71 MB
• Stars: 181
• Watchers: 10
• Forks: 60
• Open Issues: 3
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Lists

• go-awesome - gocaptcha - 验证码生成 (开源类库 / 图形处理)
• go-awesome - gocaptcha - verification code generation (Open source library / Graphics Processing)
• go-awesome - gocaptcha - 验证码生成 (开源类库 / 图形处理)

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

```

天朝可以去 http://www.golangtc.com/download/package 或 https://gopm.io 下载

#### 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) {

      //初始化一个验证码对象

		captchaImage,err := gocaptcha.NewCaptchaImage(dx,dy,gocaptcha.RandLightColor());

  	  //画上三条随机直线

  	  captchaImage.Drawline(3);

  	  //画边框

  	  captchaImage.DrawBorder(gocaptcha.ColorToRGB(0x17A7A7A));

      

  	  //画随机噪点

  	  captchaImage.DrawNoise(gocaptcha.CaptchaComplexHigh);

  

  	  //画随机文字噪点

  	  captchaImage.DrawTextNoise(gocaptcha.CaptchaComplexLower);

      //画验证码文字，可以预先保持到Session种或其他储存容器种

  	  captchaImage.DrawText(gocaptcha.RandText(4));

    	if err != nil {

    		  fmt.Println(err)

    	}

  	  //将验证码保持到输出流种，可以是文件或HTTP流等

		  captchaImage.SaveImage(w,gocaptcha.ImageFormatJpeg);

	}

```