RPG CGI is simply using RPG programs as Common Gateway Interface (CGI).
Every major web server supports CGI. You might have CGI programs written in C, Perl, PHP, ect...
Technically, all you need to write RPG CGI programs are the following IBM APIs (from
http://www.mcpressonline.com/rpg/your-first-cgi-program.html):
-QtmhGetEnv Gets a value from the CGI environment
-QtmhPutEnv Changes a value in the CGI environment
-QtmhRdStin Reads a string from the standard input device (i.e., read data sent to a CGI program from
an HTML form)
-QtmhWrStout Writes a string to the standard output device (i.e., write to the Web browser)
-QtmhCvtDB Converts URL-encoded string to an externally described data structure
-QzhbCgiParse Parses the data from an HTML form
-QzhbCgiUtils "Utilities" to create a full HTTP response
However, there exists a few RPG CGI toolkits that make doing RPG CGI much easier.
CGIDEV2 - is a freeware one put together by an IBM'er who has since retired (but IBM allowed him to
take most the code with him as open source)
eRPG - is a toolkit put together by Brad Stone that goes along with his eRPG books.
http://www.bvstools.com/erpgsdk/
RPG xTools - from Bob Cozzi includes an add-on CGILIB component.
http://www.rpgxtools.com/
Lastly, your requirement that this work at v4r5 may be a killer; I'm not even sure that the IBM APIs
required existed then.
Good luck!
Charles Wilt
Software Engineer
CINTAS Corporation - IT 92B
513.701.1307
wiltc@xxxxxxxxxx
-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx [mailto:midrange-l-
bounces@xxxxxxxxxxxx] On Behalf Of James Lampert
Sent: Wednesday, February 06, 2008 12:19 PM
To: Midrange Systems Technical Discussion
Subject: Re: ILE-native access to web services?
Perhaps a review of what a REST web service is...
http://www.xfront.com/REST-Web-Services.html
From that, all you'd need is Scott Klement's HTTP
API to consume them and some flavor of RPG CGI to
host one.
Ok. I found HTTP API on Scott Klement's site, but what's an RPG CGI?
--
James H. H. Lampert
Touchtone Corporation
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