A captcha library written in golang

Minho

Last update: Dec 29, 2022

Related tags

Overview

gocaptcha

一个简单的Go语言实现的验证码

图片实例

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);
	}

You might also like...

A path tracer written in Go.

pt: a golang path tracer This is a CPU-only, unidirectional path tracing engine written in Go. It has lots of features and a simple API. Features Supp

2k Jan 5, 2023

Pixelizer is an efficient image pixelizer written in go

Pixelizer is an image pixelizer written in go. It allows very simple and intuitive CLI pixelization. Installation To install Pixelizer, you

103 Nov 10, 2022

Gorched is terminal based game written in Go inspired by "The Mother of all games" Scorched Earth

Gorched Gorched is terminal based game written in Go inspired by "The Mother of all games" Scorched Earth. How the game looks like depends on your ter

341 Dec 13, 2022

Dendrite is a second-generation Matrix homeserver written in Go!

Dendrite Dendrite is a second-generation Matrix homeserver written in Go. It intends to provide an efficient, reliable and scalable alternative to Syn

4.2k Jan 8, 2023

Quake 2 Level Renderer written in Go and OpenGL

go-quake2 Quake 2 Map Renderer written in Go and OpenGL. Features Loads any BSP file from Quake 2 Free roam around the environment Renders only a smal

28 Jan 4, 2023

Favicon service written in Go

favicon-service (besticon) This is a favicon service: Supports favicon.ico and apple-touch-icon.png Simple URL API Fallback icon generation Docker ima

614 Dec 17, 2022

A simple API written in Go that creates badges in SVG format, based on the requested route.

A simple API written in Go that creates badges in SVG format, based on the requested route. Those graphics can be used to style README.md files, or to add tags to webpages.

3 Jul 2, 2021

Pbm - Package ppm implements a Portable Bit Map (PBM) image decoder and encoder written in Go

Package pbm import "github.com/slashformotion/pbm" Package pbm implements a Portable Bit Map (PBM) image decoder and encoder. The supported image col

0 Jan 5, 2022

geoserver is a Go library for manipulating a GeoServer instance via the GeoServer REST API.

Geoserver geoserver Is a Go Package For Manipulating a GeoServer Instance via the GeoServer REST API. How to install: go get -v gopkg.in/hishamkaram/g

78 Dec 22, 2022

Comments

go get golang.org/x/image 无法获取

package golang.org/x/image: unrecognized import path "golang.org/x/image" (https fetch: Get https://golang.org/x/image?go-get=1: dial tcp 216.239.37.1:443: i/o timeout)

opened by igo9go 2

无法编译

# github.com/golang/freetype/truetype
..\..\golang\freetype\truetype\face.go:254: undefined: font.Metrics
..\..\golang\freetype\truetype\face.go:257: undefined: font.Metrics

golang.org/x/image/font这个已经拉取最新的了

opened by heviMiwu 2

编译报错了

https://github.com/lifei6671/gocaptcha/commit/c467a25bc100109308834fc8aa96f7a6123ba6b8#diff-80924c2e51d094cf70dd1a89bf530c18 80行定义 func NewCaptchaImage(width int, height int, bgColor color.RGBA) *CaptchaImage {

https://github.com/lifei6671/mindoc/blob/master/controllers/AccountController.go 446行调用 captchaImage.DrawNoise(gocaptcha.CaptchaComplexLower)

opened by phper08 1
Fonts

增加一个init方法，在初始化的时候夹在系统的字体文件。但是只在mac上测试过，linux和windows没有测试。

在调用RandFontFamily的时候增加校验，如果字体列表为空，直接返回错误。

将example里面的读取字体文件列表的函数移到包里面了。

抱歉因为我的编辑器会自动format，增加了很多空格导致修改看起来很多。如果你不希望这个format我可以修改了再pull一次

opened by johnzeng 0