node.js利用captchapng模組實現圖片驗證碼

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安裝captchapng模組

npm install captchapng

 

nodejs中使用

var express = require(‘express‘);var captchapng = require(‘captchapng‘);//驗證碼exports.verify= function(req, res, next) {    var code = parseInt(Math.random() * 9000 + 1000);    req.session.checkcode = code;    var p = new captchapng(100, 30, code);    p.color(0, 0, 0, 0);    p.color(80, 80, 80, 255);    var img = p.getBase64();    var imgbase64 = new Buffer(img, ‘base64‘);    res.writeHead(200, {        ‘Content-Type‘: ‘image/png‘    });    res.end(imgbase64);}

 

node.js利用captchapng模組實現圖片驗證碼