January 2018
Intermediate to advanced
856 pages
17h 17m
Chinese
Content preview from Python 技術手冊 第三版
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第 19 章 客戶端網路協定模組
選擇涵蓋並推薦非常棒的第三方套件
requests
（
http://docs.python-requests.
org/
），以及它設計良好的 API 和 v2/v3 相容性，而非標準程式庫模組。
電子郵件協定
今日大多數的 email（電子郵件）都是透過實作了 SMTP（Simple Mail
Transport Protocol）的伺服器
發送
，並藉由實作了POP3（Post Office
Protocol version 3）或IMAP4（要不是原本RFC 1730（
http://bit.
ly/2nhMOq2
）規範的版本，就是 RFC 2060（
http://bit.ly/2oifQrd
）規範的
IMAP4rev1）的伺服器和客戶端來
接收
。這些協定的客戶端，分別是由
Python 標準程式庫模組
smtplib
、
poplib
與
imaplib
所支援。
如果你需要撰寫能夠透過 POP3 或 IMAP4 任一者連接的客戶端，標準的建
議會是選用 IMAP4，因為它絕對更強大，而且，依據 Python 自己的線上
文件，它在伺服端的實作通常會更正確。遺憾的是，IMAP4 的標準程式庫
模組
imaplib
，也非常的複雜，並且內容太過廣泛，無法涵蓋於本書。如
果你確定要選那條路，請善用線上說明文件、以及無法避免的、內容互補
的 RFC 1730 或 2060 這些篇幅很長的文件，可能還有其他相關的 RFC，例
如與功能性有關的 5161 與 6855，和命名空間的 2342 ...
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