Roy Kuo
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    # 結合LineBot即時回傳指定電腦的WSL IP及URL存取點 ## 介紹 本程式目的如標題,當想利用家裡電腦閒置時也能作為運算資源,又不想將電腦安裝成純Linux環境,微軟剛好提供WSL這樣的工具讓使用者能同時運行Windows和Linux雙系統,且效能也高於傳統運行在虛擬機的Linux。 但家用電腦還有另一個缺點是若非固定IP,每次電腦或路由器重新開機,就要重新查詢一次IP,費時費勁。 ## 使用工具 * Flask * Line API * Subprocess (python內建) * 詳見[Requirement](https://github.com/kuochuwon/Send_IP_for_me/blob/master/requirements.txt) ## 程式架構 * [地端: 用於推送本機最新IP](https://github.com/kuochuwon/Send_IP_for_me) * [雲端: 用於提供使用者目前IP](https://github.com/kuochuwon/LineBot) * 參考影片: {%youtube EVJ-RuoqBcI %} ## 原理概述 1. 假設使用者透過區域網路想透過手機連上同網域另一台電腦的WSL 2. 中間會經過以下的IP port fowarding * 手機 >>> 電腦 * 電腦 >>> WSL 3. 在手機 >>> 電腦這段,需要在電腦端的Windows防火牆允許外部使用者透過指定port連入 4. 在電腦 >>> WSL這段,需要應用Windows Power Shell的網路管理工具netsh,設定portproxy port forwarding,以上步驟完成後即可從手機連入WSL的存取點 5. 從實用角度來看,常見的使用情境是從外網連入WSL,這部分可以從Router的port forwarding來達成 6. 本作品將以上步驟寫成Script,結合Windows工作排程器每當系統重新啟動,重新建立IP規則 7. 建立雲端(heroku Flask)和地端(Local Flask)之間的溝通 * 地端每次電腦重新啟動均會主動推送更新的IP清單到雲端 * 使用者透過Line機器人向雲端取得最新IP * 使用者透過URL存取點,可自由存取地端WSL運行之服務 ## 參考網站 [YouTube WSL Networking](https://youtu.be/yCK3easuYm4) ## 補充 * 已知問題 * 因為Win10家用版的限制,使用者似乎不能在Python script調用系統管理員權限進行網路設定,因此工作排程需手動調整成以系統管理員權限執行 * 當地端的IP發生改變時,雲端似乎不能第一時間主動探知 * 因為IP一變,雲端等於看不見地端的主機了 * 只能被動接收地端傳送的IP清單 ###### tags: `Backend`

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