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  Oracle Tips by Burleson

Oracle HTTP Server

The requirements for running Oracle HTML DB are: an Oracle HTTP Server; and an Oracle database, version 9.2.0.3 or above, with the HTML DB objects installed into the database.  This chapter covers the installation of Oracle HTTP Server on a computer running the Windows operating system.  Some notes to help with UNIX/Linux are also included.

What is Oracle HTTP Server?

Oracle HTTP Serveris the web server supplied by Oracle which is based on the Apache HTTP Server.  It is the process that will receive HTTP requests from client browsers and submit them to the HTML DB components in an Oracle database.  Once the HTML DB components fulfill the request, the HTTP Server will return the HTML to be rendered on the client browser.

In order for the HTTP Server and the HTML DB components to communicate, there is an extension module named mod_plsql.  An extension module is an additional piece of software which can be added to the HTTP Server to extend its functionality.  The mod_plsqlmodule is loaded by the HTTP Server and acts as a middleman for communication between the Oracle HTTP Server and the HTML DB components.

A brief description of the role of Oracle HTTP Server and mod_plsql goes like this, using Figure 1.1 as reference:

1.       The client computer issues an HTTP request. (http://localhost:7777/pls/htmldb/htmldb)

2.       The Oracle HTTP Server receives the request and redirects the request to mod_plsql .

3.       mod_plsqlcommunicates the request to the HTML DB components in the Oracle database.

4.       HTML DB generates an HTML web page and replies to mod_plsql.

5.       mod_plsqlpasses the HTML page to the Oracle HTTP Server

6.       Oracle HTTP Server replies to the client browser with the HTML page. 

Prior to Installation

The following should be verified prior to starting the installation process:

  •  Meet one of the following Operating System requirements

  • Windows 2000 Professional or above with service pack 3 or higher

  • Windows XP Professional

  • Windows 2003 for 32 bit systems

  • Linux versions: Red Hat Enterprise version AS/ES 2.1 or above; or SUSE Enterprise Server version SLES-8 or above

  • Have available disk space of at least 165 MB

  • Be logged into the computer with Administrator privileges for windows or as a member of the install group on UNIX/Linux


The above book excerpt is from:

Easy HTML-DB Oracle Application Express

Create Dynamic Web Pages with OAE

ISBN 0-9761573-1-4   

Michael Cunningham & Kent Crotty

http://www.rampant-books.com/book_2005_2_html_db.htm

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