file

file

stream

socket

http

server

1. server_bind
2. server_activate
3. request(@TODO: fork/async)
   1. get_request
   2. process_request
   3. shutdown_request
   4. handle_error
4. service_actions

application

一个http服务的具化实体(命名)

IOStream

设置好的socket

context

理解为request

HTTP1ServerConnection

按http处理的socket

handler

处理context的逻辑