Re: Apache directive syntax -- WEB400

The header is correct for the initial display. Having got that screen, I
then started a service program for the job and set a breakpoint at the
beginning of the calc specs for my CGI program, which, as I have said, is
the same program that displayed my first screen. But when I pressed Enter
to get the second screen, there was no breakpoint. There was nothing in
CGIDEBUG for the second screen. but the log said

[Sat Dec 08 14:18:19 2018] [error] [client 192.168.2.210] ZSRV_MSG0018:
File /QSYS.LIB/E310PRDOBJ.LIB/E31RPP.PGM/081780817443836/ does not exist,
referer: http://192.168.2.70/cgi-bin/erros
[Sat Dec 08 14:18:19 2018] [error] [client 192.168.2.210] ZSRV_MSG0016: URI
in request POST /cgi-bin/E31RPP.PGM/081780817443836/ HTTP/1.1 is not valid,
referer: http://192.168.2.70/cgi-bin/erros

The relevant config lines seem to be
* 7* * ScriptAlias /cgi-bin/erros
/QSYS.LIB/E310PRDOBJ.LIB/E310H00000.PGM*
* 8* * Alias "/cgi-bin/" "/QSYS.LIB/E310PRDOBJ.LIB/"*
* 9* * ScriptAliasMatch ^/cgi-bin/(.*) /$1*
* 10*
* 11* * # ScriptAliasMatch ^/cgi-bin/(.*) /qsys.lib/E310PRDOBJ.LIB/$1*

Line 7 executes correctly with the display of the first screen. I have
tried it with line 11 instead of line 9 and the result is the same.

I switched on trace with *verbose logging and learnt nothing from that
except that it seemed that to imply that there was a successful match.

Have you, or anyone else, any idea what I am doing wrong?

Many thanks,

Rob

On Thu, 6 Dec 2018 at 19:29, Kevin Bucknum <Kevin@xxxxxxxxxxxxxxxxxxx>
wrote:

^ is the regex anchor for start of line. Scriptaliasmatch uses regular
expressions. The starting place of the documentation is at
https://httpd.apache.org/docs/2.4/mod/mod_alias.html

$1 is a back reference to the first matched section between ()'s, So
whatever (.*) matches. Which should be anything. I don’t know why they
have to be different, I don't even remember if I tried it with the first
method when I tested this long ago.

Are you posting to the second program? Are you sending back the right
headers? There are a lot of moving parts in persistent CGI, and it isn't
very well documented that I could find. I ended up bowing to the pressure
and reworking my processes to be stateless. Anything that needed to be
tracked from one program to the next used session variables.

-----Original Message-----
From: WEB400 [mailto:web400-bounces@xxxxxxxxxxxx] On Behalf Of Rob Dixon
Sent: Thursday, December 06, 2018 1:00 PM
To: Web Enabling the AS400 / iSeries
Subject: [WEB400] Apache directive syntax

As I have said in an earlier post, I have been running a persistent CGI
application on a V5R1 system for ten or more years using the IBM original
HTTP server. I have now transferred it to a V5R3 system and must run it
under Apache. My static pages work correctly but I am having problems with
my dynamic persistent CGI pages. The first screen is displayed correctly
with data retrieved from the database, so I assume that there are no
security problems, yet, when I click on Enter to access the second screen,
I get an error, the actual error depending on which particular version of
my config file I use.

I imagine that the problem is of my making, but, having reacted to various
kind suggestions, as yet I have achieved nothing, and I have to admit that
I really don't know what I am doing. Yet, having searched for many hours
for adequate documentation of the syntax of Apache directives, I cannot
find anything that answers my questions.

For instance, what is the effect of putting *^* at the beginning of a
ScriptAlias or ScriptAliasMatch line? What is the difference between a
ScriptAliasMatch statement that ends with $1 and another that ends $1.pgm?

https://www.easy400.net/cgidev2o/persista.htm states -

“The *ScriptAliasMatch *directive for executing persistent CGI programs
MUST HAVE the following format ScriptAliasMatch /cgidev2p/(.*)
/qsys.lib/cgidev2.lib/$1 The following format WOULD NOT WORK:
ScriptAliasMatch /cgidev2p/(.*).pgm /qsys.lib/cgidev2.lib/$1.pgm”

but neither work for me.

Can anyone please point me at documentation of the Apache syntax that
explains all this?

Many thanks,

Rob
--
Rob Dixon

www.erros.co.uk
www.boarstall.com
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[https://www.medtronsoftware.com/img/MedtronMinilogo.bmp] Kevin Bucknum
Senior Programmer Analyst
MEDDATA / MEDTRON
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