1. 日誌類型
1.1 類別
| 日誌類型 | 說明 |
| websocketpp::log::alevel | 接入日誌，默認只有debug/development日誌 |
| websocketpp::log::elevel | 錯誤日誌 |
1.2 日誌策略
| 日誌策略 | 備註 |
| websocketpp::log::basic | 基本日誌策略，寫日誌到std::ostream，默認策略 |
| websocketpp::log::syslog | POSIX系統日誌 |
| websocketpp::log::stub | 存根日誌， |
1.3 設置函數
| 日誌類型 | 函數 | 說明 |
| websocketpp::log::elevel |
clear_error_channels(level) set_error_channels(level) |
level參考2.2，默認只有debug/development級別關閉 |
| websocketpp::log::alevel |
clear_access_channels(level) set_access_channels(level) |
level參考2.1，默認只有debug/development級別關閉 |
2. 日誌級別
2.1 錯誤日誌級別
| Level | Description |
|---|---|
| none | Special aggregate value representing "no levels"： 關閉全部日誌級別 |
| devel | Low level debugging information (warning: very chatty). Requires debug or custom config.: 低級調試信息，要求debug或custom配置 |
| library | Information about unusual system states or other minor internal library problems, less chatty than devel.: 關於系統狀態或其他最小內部庫問題的信息，比devel級別輸出少 |
| info | Information about minor configuration problems or additional information about other warnings.: 關於最小配置問題信息或其他警告的額外信息 |
| warn | Information about important problems not severe enough to terminate connections.： 警告 |
| rerror | Recoverable error. Recovery may mean cleanly closing the connection with an appropriate error code to the remote endpoint.：可恢復的錯誤 |
| fatal | Unrecoverable error. This error will trigger immediate unclean termination of the connection or endpoint.: 不可恢復錯誤 |
| all | Special aggregate value representing "all levels": 全部日誌級別 |
2.2 接入日誌級別
| Level | Description |
|---|---|
| none | Special aggregate value representing "no levels"：關閉全部日誌級別 |
| connect | One line for each new connection that includes a host of information including: the remote address, websocket version, requested resource, http code, remote user agent: 一行包含一條connection日誌 |
| disconnect | One line for each connection that is closed. Includes closing codes and reasons：一行包含一條connect關閉日誌 |
| control | One line per control message: 一行包含一條控制消息日誌 |
| frame_header | One line per frame, includes the full frame header: 一行包含一幀，只包含幀頭 |
| frame_payload | One line per frame, includes the full message payload (warning: lots of output for large messages): 一行包含一幀，只包含消息載荷 |
| message_header | Reserved：保留 |
| message_payload | Reserved：保留 |
| endpoint | Reserved：保留 |
| debug_handshake | Extra information about opening handshakes: 打開握手的額外信息 |
| debug_close | Extra information about closing handshakes: 關閉握手的額外信息 |
| devel | Development messages (warning: very chatty). Requires debug or custom config: development消息，要求debug或custom 配置 |
| app | Special channel for application specific logs. Not used by the library.應用定製日誌 |
| all | Special aggregate value representing "all levels": 表示全部日誌級別 |