标签：
http://www.cnblogs.com/cswuyg/p/3653263.html
http://blog.csdn.net/mengyafei43/article/details/25195445
http://www.codeceo.com/article/http-long-connect.html
http长链接与短链接
原文地址：http://www.cnblogs.com/coding4/p/5816540.html
