node验证码生成工具

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推荐一款node验证码生成工具 ccap

以下内容翻译自官方说明

不需要安装额外的库和软件，只需要用npm安装ccap就可以生成验证码。
支持的node版本 0.12.x and 4.x.x

安装

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var captcha = ccap();

var captcha = ccap(width, height, offset);

var captcha = ccap({
	
	width:256,//set width,default is 256

	height:60,//set height,default is 60

	offset:40,//set text spacing,default is 40

	quality:100,//set pic quality,default is 50

	fontsize:57,//set font size,default is 57

	generate:function(){//Custom the function to generate captcha text
	
	     //generate captcha text here

	     return text;//return the captcha text

	}

});

简单示例

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var http = require('http');

var ccap = require('ccap')();//Instantiated ccap class 

http.createServer(function (request, response) {

	if(request.url == '/favicon.ico')return response.end('');//Intercept request favicon.ico

	var ary = ccap.get();

	var txt = ary[0];

	var buf = ary[1];

	response.end(buf);

	console.log(txt);

}).listen(8124);

console.log('Server running at http://127.0.0.1:8124/');

API

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var captcha = ccap();

var ary = captcha.get();//ary[0] is captcha's text,ary[1] is captcha picture buffer.

var text = ary[0];

var buffer = ary[1];

停止或开启缓存定时器

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var ccap = require('ccap')();

ccap.timerIsRunning(); //now timer is running, return 1

ccap.clearTimeout(); //stop all create capature image, so will use the same the 20(default is 20) capature images

ccap.timerIsRunning();//now timer is stoped, return 0

captcha8.setTimeout();//now timer is start again

ccap.timerIsRunning();//now timer is stoped, return 1