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Nodejs生成简单验证码、随机码图片

默认分类 2015/03/22 07:09

https://www.npmjs.com/package/captchapng

var http = require('http');
var captchapng = require('captchapng');

http.createServer(function (request, response) {
    if(request.url == '/captcha.png') {
        var p = new captchapng(80,30,parseInt(Math.random()*9000+1000)); // width,height,numeric captcha 
        p.color(0, 0, 0, 0);  // First color: background (red, green, blue, alpha) 
        p.color(80, 80, 80, 255); // Second color: paint (red, green, blue, alpha) 

        var img = p.getBase64();
        var imgbase64 = new Buffer(img,'base64');
        response.writeHead(200, {
            'Content-Type': 'image/png'
        });
        response.end(imgbase64);
    } else response.end('');
}).listen(8181);