處理HTTP請求的11個階段
如下圖：
| 序號 | 階段 | 指令 | 備注 |
| 1 | POST_READ | realip | 獲取客戶端真實IP |
| 2 | SERVER_REWRITE | rewrite | |
| 3 | FIND_CONFIG | ||
| 4 | REWRITE | rewrite | |
| 5 | POST_REWRITE | ||
| 6 | PRE_ACCESS | limit_conn, limit_req | |
| 7 | ACCESS | auth_basic, access, auth_request | auth_basic可以做訪問限制 |
| 8 | POST_ACCESS | ||
| 9 | PRE_CONTENT | try_files | |
| 10 | CONTENT | index, autoindex, concat | |
| 11 | LOG | access_log | access_log記錄請求日志 |