About server information

Anonymous Monk has asked for the wisdom of the Perl Monks concerning the following question:

I just start to learn CGI, I try to know some information about my server, my script looks like:


#! /usr/local/bin/perl

print "Content-type: text/html", "\n\n";

print "<HTML>", "\n";
print "<HEAD><TITLE>About this Server</TITLE></HEAD>", "\n";
print "<BODY><H1>About this Server</H1>", "\n";
print "<HR><PRE>", "\n";
print "Server Name:    ", $ENV{'SERVER_NAME'}, "<BR>","\n";
print "Running on Port: ", $ENV{'SERVER_PORT'}, "<BR>", "\n";
print "Server Software: ", $ENV{'SERVER_SOFTWARE'},"<BR>", "\n";
print "Server Protocol: ", $ENV{'SERVER_PROTOCOL'},"<BR>", "\n";
print "CGI Revision:    ", $ENV{'GATEWAY_INTERFACE'},"<BR>", "\n";
print "<HR></PRE>", "\n";
print "</BODY></HTML>", "\n";

exit (0);
[download]

But the output has no any information about server:

Content-type: text/html

<HTML>
<HEAD><TITLE>About this Server</TITLE></HEAD>
<BODY><H1>About this Server</H1>
<HR><PRE>
Server Name:    <BR>
Running on Port: <BR>
Server Software: <BR>
Server Protocol: <BR>
CGI Revision:    <BR>
<HR></PRE>
</BODY></HTML>
[download]

I use Red Hat 7.2 version OS, and SSH both give me the same result, What is wrong? Thanks in advance!

Comment on About server information Select or Download Code

Replies are listed 'Best First'.
Re: About server information by projekt21 (Friar) on Jul 29, 2003 at 13:52 UTC
Are you running this on a command line? Then your output is right, as none of those environment variables are set. chmod +x your file, place it in your cgi-bin directory and call it via a browser. and always "use CGI" ... `use CGI; my $q = CGI->new; print $q->header; print "<HTML>", "\n"; # .....` [download] alex pleiner <alex@zeitform.de> zeitform Internet Dienste	[reply] [d/l]
Re: Re: About server information by Anonymous Monk on Jul 29, 2003 at 15:30 UTC
Thank you so much! I am really shame about knowing nothing about CGI yet. Do I have to use commond: `mkdir cgi-bin` to make a cgi-bin directory? and how to make a call by browser? Great thanks again!	[reply] [d/l]
Re: Re: Re: About server information by projekt21 (Friar) on Jul 29, 2003 at 15:58 UTC
Well, that's tough :-). No need to shame, we all started once. If that's your Redhat System, you may find the webserver Apache installed somewhere (maybe in /usr/local/apache, maybe elsewhere). CGI provides an interface for that webserver to run a script and output its result. Apache is configured via a file named httpd.conf. Within this file a directory needs to be configured as (example): `<Directory "/usr/local/apache/cgi-bin"> AllowOverride AuthConfig Order allow,deny Allow from all Options +ExecCGI ### this is the relevant piece </Directory> ScriptAlias /cgi-bin/ "/usr/local/apache/cgi-bin/"` [download] So you place your script in that cgi-bin directory and open a web browser with the URL: `http://localhost/cgi-bin/your-script.pl` [download] The output will show your server stats. If that's not your own system, please ask the question "Where can I place my CGI scripts?" to your webmaster. She will help you. Perhaps someone redhat compatible can give some better directions to start. alex pleiner <alex@zeitform.de> zeitform Internet Dienste	[reply] [d/l] [select]
Re: About server information by DrHyde (Prior) on Jul 29, 2003 at 13:54 UTC
Which HTTP server (exact version, plus what extra modules if any?). Is there any other software involved - for instance, does your service provider wrap your CGIs in cotton wool in an attempt to protect against programmer error?	[reply]