node-gm-captcha

Pre

1. this project is still on working , its functionalities are not finally completed.
2. it now just support number captcha and has many limitations.

installation

1. install Graphics Magick and make sure it can work on your computer.
2. npm i node-gm-captcha

usage

let Captcha = require('node-gm-captcha');
Captcha.genPic({type:'num',filename:'./uniqueid.jpg'},(err,data)=>{
    if(err) throw err;
    console.log(data);
})

As the example above , you will get an image named 'uniqueid.jpg' under your project folder. And the data will include some data you need , such as the number , filepath , with these , you can do your business logic.

doc

genPic(param:object , callback:fn):void

1. param

   key	type	required	desc
   type	string	yes	it now only can set to 'num'
   filename	string	yes	where to store the pic , it should be relative path
   fontSize	number	no	the font size
   w	number	no	the width of the picture
   h	number	no	the height of the picture

2. callback: function(err , data:metaData){ }

Todo

• make the pic more complex from recognizing
• support char type capthcha
• support mix type(char and number) captcha
• add delete method so you can easily delete the pic
• expose more customized params and method