WhatsApp 背地的开源力量

WhatsApp 被FB以$190亿美刀收购后，似乎才开始在国内被了解起来，实际上它在2009年就出现了，国外用的多些。但估计在国内很难生存，起码每年$1的年费（WP、安卓首年免费）就不会受中国老百姓待见了。我们来看看WhatsApp 背后用了哪些开源项目吧~

1、Erlang 高可靠性编程语言（爱立信）：

Erlang is a programming language used to build massively scalable soft real-time systems with requirements on high availability.

2、FreeBSD操作系统：

FreeBSD is an advanced computer operating system used to power modern servers, desktops and embedded platforms.

3、jqGrid 表格：

jqGrid is an Ajax-enabled JavaScript control that provides solutions for representing and manipulating tabular data on the web.

4、libphonenumber 国际手机号码解析库：

libphonenumber is Google's common Java, C++ and Javascript library for parsing, formatting, storing and validating international phone numbers.

5、LightOpenId  轻量级openid鉴权：

LightOpenId is a PHP 5 library for easy openid authentication.

6、lighttpd 高性能http服务器：

lighttpd is an open-source web server optimized for high performance environments while remaining standards-compliant, secure and flexible.

7、PHP 脚本语言，这个不说了：

PHP is a popular general-purpose scripting language that is especially suited to web development.

8、yaws 轻量级的支持动态内容的web服务器：

yaws is a HTTP high perfomance 1.1 webserver particularly well suited for dynamic-content web applications.

另外，WhatsApp 通讯协议是基于开放的XMPP（Extensible Messaging and Presence Protocol），但作了定制化处理。.