node-ccap —— node.js generate captcha using c++ library CImg. 
You can generate captcha without install any other libraries or software, only do npm install ccap, that's all.
support node 0.12.x and 4.x.x
node-ccap support linux, windows and mac.
compile maybe cost you 1 minute,simply wait;
linux support jpeg,windows and mac only support bmp!
Please never using ccap in production on windows and mac, only with linux.
##performance
generate captcha picture 1204/sec;//BMP unzip
##Install
npm install ccap (new version, need node 0.12.x and 4.x.x and 6.x.x, on linux need gcc v4.8+)
npm install [email protected] (stop update, need node 0.8.x - 0.10.x)
var ccap = require('ccap')
if you don't want to update gcc version, ccap package Compiled file is in folder release, just download it and copy it to your node_modules.
if you are in China (and behind the GWF), please use cnpm to install ccap like this
1.npm install cnpm -g --registry=https://registry.npm.taobao.org
2.cnpm install node-gyp -g
2.cnpm install ccap
##Instantiated
these three ways all will be ok:
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
}
});
##API
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];
##Simple Example
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/');
#Stop and start timer cache
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
MIT LINCENCE
Copyright (c) 2013 wu zhonghua <[email protected]>
The MIT License
Permission is hereby granted, free of charge, to any person obtaining
a copy of this software and associated documentation files (the
"Software"), to deal in the Software without restriction, including
without limitation the rights to use, copy, modify, merge, publish,
distribute, sublicense, and/or sell copies of the Software, and to
permit persons to whom the Software is furnished to do so, subject to
the following conditions:
The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.