📅 最后修改于: 2020-11-06 06:25:29 🧑 作者: Mango
Internet协议旨在在世界各地所有与Internet连接的计算机上实现统一的地址系统，并使数据包能够从Internet的一端传输到另一端。诸如Web浏览器之类的程序应该能够在任何地方连接到主机，而无需知道每个数据包在其运行过程中所经过的网络设备的迷宫。 Internet协议有各种类别。创建这些协议是为了满足Internet中不同计算机之间不同类型的数据通信的需求。
Python有几个模块来处理这些通信场景中的每一个。这些模块中的方法和功能可以完成仅验证URL的最简单工作，也可以完成处理Cookie和会话的复杂工作。在本章中，我们将介绍用于互联网协议的最杰出的Python模块。
| Protocol | Python Module Name | Description |
|---|---|---|
| HTTP | urllib.request | Opening the HTTP URL |
| HTTP | urllib.response | Create a reponse object for a url request |
| HTTP | urllib.parse | To break Uniform Resource Locator (URL) strings up in components like (addressing scheme, network location, path etc.), |
| HTTP | urllib.robotparser | It finds out whether or not a particular user agent can fetch a URL on the Web site that published the robots.txt file. |
| FTP | ftplib | implements the client side of the FTP protocol. You can use this to write Python programs that perform a variety of automated FTP jobs, such as mirroring other FTP servers. |
| POP | poplib | This module defines a class, POP3, which encapsulates a connection to a POP3 server to read messages from a email server |
| IMAP | imaplib | This module defines three classes, IMAP4, IMAP4_SSL and IMAP4_stream, which encapsulate a connection to an IMAP4 server to read emails. |
| SMTP | smtplib | The smtplib module defines an SMTP client session object that can be used to send mail to any Internet machine with an SMTP listner deamon. |
| Telnet | telnet | This module provides a Telnet class that implements the Telnet protocol to access a server thorugh teleent. |
在后面的章节中将详细讨论它们中的每一个。