Re: can't connect to ArchiveDataServer

[Kay-Uwe Kasemir <kasemirk@ornl.gov>]

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