libevent evbuffer参考文章

https://blog.csdn.net/FreeeLinux/article/details/52799951

http://cache.baiducontent.com/c?m=9d78d513d9931ff20dfa950e1a16a0711824c1386084c7140fc3933f84652b101a39f4ba57351073c4c40c365db8492dabe73603675d7de28cc9f85ddacf85295f8e3035004fd65613a319a9dc47559776875b99a81be4b8f33384afa285c85523c844040adae78a2a1714bd78f1646ba5f9c75c521f4eb5b77623bd4e765a823e10e81aacf7321946daaa8e4b4cb47b8d3e0697d864ec2353a843fa424e3343d44ae258512066b64825fc463e05c4e907f02a0e1a65e916&p=81769a47ca934eac59ebdd2b444381&newp=cb7dd116d9c157ff57ee9578160c98231610db2151d6d6146b82c825d7331b001c3bbfb423251102d8c17a6000a44e58ecf03678330523a3dda5c91d9fb4c574799e&user=baidu&fm=sc&query=http%3A//blog%2Esina%2Ecom%2Ecn/s/blog_4ab24dd501013d0h%2Ehtml&qid=d9d50f9e000099a4&p1=1

 

https://blog.csdn.net/yusiguyuan/article/details/20482675