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從瀏覽器輸入網址到看到網頁到底發生了哪些事? | Hello Python

https://setmao.github.io/2021-07-04/%E5%BE%9E%E7%80%8F%E8%A6%BD%E5%99%A8%E8%BC%B8%E5%85%A5%E7%B6%B2%E5%9D%80%E5%88%B0%E7%9C%8B%E5%88%B0%E7%B6%B2%E9%A0%81%E5%88%B0%E5%BA%95%E7%99%BC%E7%94%9F%E4%BA%86%E5%93%AA%E4%BA%9B%E4%BA%8B%EF%BC%9F/

在 browser 輸入網址 browser 跟 OS 要網址的 IP address OS 向 DNS 查詢 IP address(如果有 cache 會直接回傳 IP address 給 OS) DNS 向 Name Server 查詢 IP address OS 將從 DNS/Name Server 查詢到的 IP address 回傳給 browser browser 拿到 IP

Django-1.11-to-2.2 | Hello Python

https://setmao.github.io/2020-06-08/Django-1-11-to-2-2/

前言因為 Django 1.11 在今年四月開始停止更新了,所以花了一天時間幫公司從 Django 1.11 升級到 2.2於是想用這篇來記錄一下升級的過程 前置作業:我在升級前找了很多資料跟別人升級的心得,主要參考以下幾篇 博客将 Django 1.11+ 升级到 Django 2.2+ 遇到的问题及规避方法 Django1和2的区别 Upgrading Django to a newer

Python 的 GIL 是什麼? | Hello Python

https://setmao.github.io/2021-07-11/Python-%E7%9A%84-GIL-%E6%98%AF%E4%BB%80%E9%BA%BC%EF%BC%9F/

前言在面試的時候被問到 GIL,雖然我是直接回答說我看不懂,但是仔細想想上一次看也是快一年前了,於是想趁報到前再來挑戰一次 GIL 主要會分兩個部分來講 GIL 是什麼 GIL 會造成什麼影響 如何避免 GIL 造成的問題 總結 GIL 是什麼? In CPython, the global interpreter lock, or GIL, is a mutex that protects

面試 debug 情境題 | Hello Python

https://setmao.github.io/2021-07-06/%E9%9D%A2%E8%A9%A6-debug-%E6%83%85%E5%A2%83%E9%A1%8C/

前言面試的時候被考到一題情境題覺得蠻有趣的,於是決定記錄下來 面試過程面試官:今天有一個網站是 3-tier 的架構(前端、後端、資料庫),某天你發現首頁 load 不出來,這時候你會怎麼做? 我:打開瀏覽器的 console 看 network 那邊的 request 狀態是怎樣 面試官:你打開了,看到 request 沒有回傳 response,就卡著 我:這樣看起來是後端掛了,先檢查後端的

Django Migrations | Hello Python

https://setmao.github.io/2020-05-28/Django-Migrations/

前言Django 的 Migrations 除了在能在資料庫中建立新的資料表、修改舊的資料表結構外,我們也能自己寫 code 在新增資料表、修改舊的資料表結構的同時對資料表做 CRUD(Create, Read, Update, Delete) 比如以下情境: 我現在要新建一個資料表用來存 Email Template 給客戶使用,希望在建立資料表的同時能將一些 default template

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