HTTP: The Definitive Guide by David Gourley

By David Gourley

At the back of each internet transaction lies the Hypertext move Protocol (HTTP) - the language of net browsers and servers, of portals and se's, of e-commerce and net companies. figuring out HTTP is key for virtually all web-based programming, layout, research, and management. whereas the fundamentals of HTTP are elegantly basic, the protocol's complicated positive aspects are notoriously complicated, simply because they knit jointly advanced applied sciences and terminology from many disciplines.

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HTTP applications need to work hard to robustly handle different variations of the HTTP protocol. 9. This protocol contains many serious design flaws and should be used only to interoperate with legacy clients. 9 supports only the GET method, and it does not support MIME typing of multimedia content, HTTP headers, or version numbers. 9 was originally defined to fetch simple HTML objects. 0. 0 was the first version of HTTP that was widely deployed. 0 added version numbers, HTTP headers, additional methods, and multimedia object handling.

The path tells what particular local resource on the server is being requested. See Figure 2-1 for an illustration. ht x-fa inde Client Server Disk Figure 2-1. How URLs relate to browser, machine, server, and location on the server’s filesystem URLs can direct you to resources available through protocols other than HTTP. info Copyright © 2008 O’Reilly & Associates, Inc. All rights reserved. com:554/interview/cto_video URLs provide a way to uniformly name resources. Most URLs have the same “scheme://server location/path” structure.

Info Copyright © 2008 O’Reilly & Associates, Inc. All rights reserved. | 15 Example 1-1.

... Connection closed by foreign host. com web server, which is listening on port 80. The three lines after the command are output from Telnet, telling us it has established a connection. com. After that, the server responds with a response line, several response headers, a blank line, and finally the body of the HTML document. Beware that Telnet mimics HTTP clients well but doesn’t work well as a server.

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