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#! /usr/bin/perl
# vim:ts=8:sw=8
use strict;
use warnings;
use utf8;
use CGI qw(fatalsToBrowser);
use DBI;
use Data::Dumper;
use JSON;
use nms;
package nms::web;
use base 'Exporter';
our @EXPORT = qw(finalize_output json cgi dbh db_safe_quote);
our $cgi;
our %json;
our $dbh;
our $now;
our $when;
our $ifname;
our %cc;
# Print cache-control from %cc
sub printcc {
my $line = "";
my $first = "";
foreach my $tmp (keys(%cc)) {
$line .= $first . $tmp . "=" . $cc{$tmp};
$first = ", ";
}
print 'Cache-Control: ' . $line . "\n";
}
sub db_safe_quote {
my $word = $_[0];
my $term = $cgi->param($word);
if (!defined($term)) {
if(defined($_[1])) {
$term = $_[1];
} else {
die "Missing CGI param $word";
}
}
return $dbh->quote($term) || die;
}
# returns a valid $when statement
# Also sets cache-control headers if time is overridden
sub setwhen {
my $when;
$now = "now()";
if (defined($cgi->param('now'))) {
$now = db_safe_quote('now') . "::timestamp ";
$cc{'max-age'} = "3600";
}
$when = " time > " . $now . " - '5m'::interval and time < " . $now . " ";
return $when;
}
# Sets the ifname. If we are logged in, it's simply set to "ifname", otherwise
# it's hashed for anonymization.
sub obfuscateifname {
my $ifname = "ifname";
if (defined($cgi->param('public'))) {
$ifname = "regexp_replace(ifname, 'ge-0/0/(([0-3][0-9])|(4[0-3])|([0-9]))\$',concat('ge-participant',sha1_hmac(ifname::bytea,'".$nms::config::nms_hash."'::bytea))) as ifname";
}
return $ifname;
}
sub finalize_output {
my $query;
$query = $dbh->prepare ('select ' . $now . ' as time;');
$query->execute();
$json{'time'} = $query->fetchrow_hashref()->{'time'};
$json{'username'} = $cgi->remote_user();
printcc;
print $cgi->header(-type=>'text/json; charset=utf-8');
print JSON::XS::encode_json(\%json);
print "\n";
}
BEGIN {
$cgi = CGI->new;
$cc{'stale-while-revalidate'} = "3600";
$cc{'max-age'} = "20";
$dbh = nms::db_connect();
# FIXME: Shouldn't be magic.
# Only used for setting time in result from DB time.
# FIXME: Clarification, this _has_ to be set before setwhen is run,
# since it secretly overrides it.
$when = setwhen();
$ifname = obfuscateifname();
}
1;
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