Addressing OLTP Solutions with CICS: The Transaction Server ... - Ibm
Addressing OLTP Solutions with CICS: The Transaction Server ... - Ibm
Addressing OLTP Solutions with CICS: The Transaction Server ... - Ibm
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9.1 Some Terminology<br />
9.2 Services<br />
134 <strong>CICS</strong> for AIX as the <strong>Transaction</strong> <strong>Server</strong><br />
You have to understand a number of Internet and Web browser terms before we<br />
can discuss the <strong>CICS</strong> Internet Gateway for AIX in any level of detail.<br />
URL A uniform resource locator (URL) is an addressing scheme. URLs are<br />
used to locate pages on the Web.<br />
HTML <strong>The</strong> Hypertext Markup Language (HTML) defines the format and<br />
contents of documents sent from the Web server to a Web browser for<br />
formatting and display. HTML uses tags to specify formatting and<br />
document structure and identify hypertext links.<br />
HTTP <strong>The</strong> Hypertext Transfer Protocol (HTTP) is the protocol that a Web<br />
browser uses to communicate <strong>with</strong> a Web server.<br />
Forms Initially, the information flow was essentially one-way (from Web<br />
server to Web browser) on the Internet. A forms function has been<br />
added to HTML that allows you to specify input fields that enable Web<br />
browsers to send data to the server. It allows the Web browsers to<br />
access many different types of applications, such as <strong>OLTP</strong><br />
applications.<br />
CGI <strong>The</strong> common gateway interface (CGI) is a means of allowing a Web<br />
server to execute a program that you provide, rather than retrieving a<br />
file. For some applications, for example, displaying information from<br />
a databasee, you must do more than simply retrieve an HTML<br />
document from a disk. So the Web server has to call a program to<br />
generate the HTML to be displayed.<br />
<strong>The</strong> <strong>CICS</strong> Internet Gateway for AIX (see Figure 40 on page 135 and Figure 41 on<br />
page 136) makes it possible to access and run many existing and new <strong>CICS</strong> 3270<br />
applications using standard Web browsers. Typically, no changes are needed in<br />
the <strong>CICS</strong> applications, and application code is not required for the gateway itself.<br />
<strong>The</strong> gateway can also be used to provide an alternative user interface for <strong>CICS</strong><br />
applications <strong>with</strong>in an enterprise as well as across the Internet.<br />
<strong>The</strong> <strong>CICS</strong> Internet Gateway for AIX provides an interface between a Web server<br />
and a <strong>CICS</strong> application, allowing conversion of 3270 data streams into the HTML<br />
format used by the Web. <strong>The</strong> <strong>CICS</strong> application can then be accessed by any<br />
Web browser.