September 1999
Intermediate to advanced
256 pages
7h 5m
English
Content preview from Oracle Web Applications: PL/SQL Developer's IntroBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Server-to-Client Communication
The Internet (or an intranet) is a network that links different computers together. Before we can start writing web applications, we must understand how the output from these systems actually gets from the server to the browser, which means that we have to learn a little about how the Internet and the Web work.
OAS and WebDB use standard Internet conventions and protocols to send resources to a client. The most important parts of this interchange are:
A TCP/IP network to connect the server to the client
A software communication port to serve as a collection point for incoming requests
A transfer protocol called HTTP to govern how server and client communicate
A client program called a web browser to allow users to request and receive resources from the OAS or WebDB server
A uniform resource locator (URL) to allow the browser to find a particular resource
A MIME type to tell the browser what to do with resources once received from the OAS or WebDB server
The following sections briefly describe each of these parts.
The TCP/IP Network
Browsers connect to an OAS or WebDB server using the TCP/IP networking protocol. Although there are a number of different types of networking protocols, such as DECNet or IPX, web systems only work with TCP/IP. Fortunately, more and more operating systems have this functionality built in, including Unix, Windows 95, Windows 98, Windows NT, OS/2, and Linux.
Every machine on a TCP/IP network is identified by a four-part IP ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.