Use Perl Scripts2017/06/27

	Enable CGI and Use Perl Scripts.
[1]	Install Perl.

root@www:~#

apt -y install perl libcgi-pm-perl

[2]	Enable CGI module.

root@www:~#

a2enmod cgid

Enabling module cgid.
To activate the new configuration, you need to run:
systemctl restart apache2
root@www:~#

systemctl restart apache2

[3]	After enabeling CGI, CGI scripts are allowed to execute under [/usr/lib/cgi-bin] directory by default. Therefore, for example, if a Perl script [index.cgi] is put under the directory, it's possible to access to the URL [http://(Apache2 Server)/cgi-bin/index.cgi] from Clients.

# create a test script

root@www:~#

cat > /usr/lib/cgi-bin/test_script <<'EOF'
#!/usr/bin/perl
print "Content-type: text/html\n\n";
print "Hello CGI\n";
EOF

root@www:~#

chmod 705 /usr/lib/cgi-bin/test_script

# try to access

root@www:~#

curl http://localhost/cgi-bin/test_script

Hello CGI

[4]	If you'd like to allow CGI in other directories except default, configure like follows. For example, allow in [/var/www/html/cgi-enabled].

root@www:~#

vi /etc/apache2/conf-available/cgi-enabled.conf

# create new

# processes .cgi and .pl as CGI scripts

<Directory "/var/www/html/cgi-enabled">
    Options +ExecCGI
    AddHandler cgi-script .cgi .pl
</Directory>

root@www:~#

mkdir /var/www/html/cgi-enabled

root@www:~#

a2enconf cgi-enabled

Enabling conf cgi-enabled.
To activate the new configuration, you need to run:
  service apache2 reload

root@www:~#

systemctl restart apache2

[5]	Create a CGI test page and access to it from any clients with web browser. It's OK if following page is shown.

root@www:~#

vi /var/www/html/cgi-enabled/index.cgi

#!/usr/bin/perl

print "Content-type: text/html\n\n";
print "<html>\n<body>\n";
print "<div style=\"width: 100%; font-size: 40px; font-weight: bold; text-align: center;\">\n";
print "CGI Test Page";
print "\n</div>\n";
print "</body>\n</html>\n";

root@www:~#

chmod 705 /var/www/html/cgi-enabled/index.cgi

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