Experimental Physics and
Industrial Control System

Devin Bougie <[email protected]> · Wed, 7 Dec 2005 12:16:44 -0500

Many thanks to Kay and Paul for pointing us in the right direction.
We were actually missing the "ScriptAlias" directive. I believe the
httpd setup as outlined in the Channel Archiver manual should contain
the line:

ScriptAlias /archive/cgi "/var/www/html/archive/cgi"
Thanks again,
Devin
On Dec 6, 2005, at 12:46 PM, Kay-Uwe Kasemir wrote:

On Dec 6, 2005, at 12:24 , Devin Bougie wrote:
Hi All,
We have built the 11/07/2005 snapshot of the Channel Archiver with
EPICS R3.14.7 . Everything seems to be working until we try to
connect to the ArchiveDataServer.
Using the java Archive Viewer, the following error appears on the
console when trying to connect to ArchiveDataServer.cgi :

Fatal error parsing XML: org.xml.sax.SAXParseException: expected
Element
and the java Archive Viewer gui displays the following error:

java.lang.IllegalArgumentException: Couldn't execute the
archiver.info request

java.io.IOException: org.xml.sax.SAXParseException: expected Element
ArchiveDataClient.pl gives a somewhat different error:

[dab66@ees101 dab66]% ArchiveDataClient.pl -u $URL -a

Archives:

not well-formed (invalid token) at line 1, column 0, byte 0 at /
usr/lib/perl5/vendor_perl/5.8.0/i386-linux-thread-multi/XML/
Parser.pm line 185

The very likely cause:
Your web server is not properly configured to recognize CGI scripts.
So the URL used to run the ArchiveDataServer.cgi
does not execute ArchiveDataServer.cgi
and hence return some form of XML.
Instead, you get a dump of the executable file.
Try this to verify:
telnet my_web_server_host 80
GET /archive/cgi/ArchiveDataServer.cgi HTTP/1.0<RETURN>
<RETURN>
If you get an error message wrapped into ugly XML,
you're fine.
If you get garbage that looks like a binary dump
of the ArchiveDataServer.cgi program,
look for anything with 'cgi' or 'CGI' or 'Cgi' in your web server
config file. Per default, newer Apache versions have cgi
disabled (commented-out) and you have to re-enable it.
-Kay

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System