2.2 Web and HTTP

最新推荐文章于 2025-07-04 15:40:45 发布

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最新推荐文章于 2025-07-04 15:40:45 发布

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文章标签： web server parsing header tcp object

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本文详细解析了HTTP请求与响应的基本流程，并深入探讨了Cookie在Web交互过程中的作用，包括其组成和存储机制。从客户端发起连接到服务器响应，再到客户端接收并处理响应，每一步都涉及关键的技术细节。

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- URL(universal resource locate)

ex.www.someschool.edu/someDept/pic.gif(include hostname and pathname)

HTTP: hypertext transfer protocol

Nonpersistent HTTP

suppose user enters URL:www.someSchool.edu/someDepartment/home.index

1a. HTTP client initiates TCP connection to HTTP server (process) at www.someSchool.edu on port 80

1b. HTTP server at host www.someSchool.edu waiting for TCP connection at port 80. “accepts” connection, notifying client

2. HTTP client sends HTTP request message (containing URL) into TCP connection socket. Message indicates that client wants object someDepartment/home.index

3. HTTP server receives request message, forms response message containing requested object, and sends message into its socket

4. HTTP server closes TCP connection.

5. HTTP client receives response message containing html file, displays html. Parsing html file, finds 10 referenced jpeg objects

6. Steps 1-5 repeated for each of 10 jpeg objects

components of cookies

1) cookie header line of HTTP response message
2) cookie header line in HTTP request message
3) cookie file kept on user’s host, managed by user’s browser
4) back-end database at Web site

fmi:http://zhidao.baidu.com/question/13967823.html