nginx中对http请求的处理流程如图所示:
ngx_create_listening()监听server端口,当一旦有人调用connnect连接这个端口时,epoll_wait()->accept();accept返回之后,通过handler回调ngx_http_init_connection初始化一个连接connection; 代码位置:ngx_epoll_module.c:ngx_epoll_process_events()->rev->handler(rev)
走进http请求行处理的函数中,在ngx_http_process_request_line()->ngx_http_process_request()->ngx_http_core_module.c:ngx_http_core_run_phases()
typedef enum {
NGX_HTTP_POST_READ_PHASE = 0,
NGX_HTTP_SERVER_REWRITE_PHASE, //重定向
NGX_HTTP_FIND_CONFIG_PHASE, //find location,http://192.168.72.190:8000/will ,找对应的uri资源;
NGX_HTTP_REWRITE_PHASE,
NGX_HTTP_POST_REWRITE_PHASE,
NGX_HTTP_PREACCESS_PHASE,
NGX_HTTP_ACCESS_PHASE,
NGX_HTTP_POST_ACCESS_PHASE,
NGX_HTTP_PRECONTENT_PHASE,
NGX_HTTP_CONTENT_PHASE, //content处理
NGX_HTTP_LOG_PHASE //日志的处理;
} ngx_http_phases;
存放checker指针的结构体定义