use strict;
use warnings;
use LWP::UserAgent;
use Data::Dumper;
use JSON::PP;
use HTTP::Request::Common;

my $query = "research";
my $format = "";
my $domain = "";
my $language = "";
	
my $data = { query => $query, format => $format, domain => $domain, language => $language };

my $url = 'MyDomain/cgi-bin/querySearchEngine.pl';
my $ua  = LWP::UserAgent->new;
my $request = POST($url, Content_Type=>'application/json',
	Content => encode_json($data) );
my $response = $ua->request($request);
	
if ($response->is_success) {
	my $json_text= $response->content;    
	my $decoded_json = decode_json( $json_text );
}

##</code><code>##

{"myData":["https://www.sante.de/fileadmin/user_upload/Stellenanzeige_Mitarbeiter_Research__Development.pdf","https://www.national-bank.de/fileadmin/user_upload/nationalbank/Vermoegensmanagement/Research/Kapitalmarkt_Studien/Kapitalmarktmonitor_Dezember_2018.pdf","https://www.acxit.com/en/wp-content/uploads/2018/12/CAREERS_Stellenanzeige_WS_Research_Deal_Generation_20181211.pdf","https://www.s-a.uni-muenchen.de/studierende/jobboerse/jobangebote/aktuelle/20181221_44.pdf","https://www.dbresearch.de/PROD/RPS_DE-PROD/PROD0000000000459596/Deutscher_H%C3%A4user-_und_Wohnungsmarkt_2018.pdf","https://www.bayernlb.de/internet/media/de/ir/downloads_1/bayernlb_research/multiasset_produkte/Perspektiven.pdf","https://www.borders-in-motion.de/documents/12991/347234/Flyer_Research_Factory_WS18-19.pdf/2baa6987-219a-4cbb-8ab0-da36754f1282","https://deka.de/site/dekade_privatkunden_site/get/documents/dekade/Publikationen/2018/Volkswirtschaft/Aktuell/20181220_VA_USA_Zinsentscheid.pdf","https://www.dmtm.com/medienverwaltung/medien/181218_Research_Engineer_Website.pdf","https://www.ewi.research-scenarios.de/cms/wp-content/uploads/2018/08/Czock_CV_de_20181214.pdf"]}

##</code><code>##

#!/usr/bin/perl
use strict;
use warnings;
use CGI qw(:standard);
use JSON;
use utf8;
use LWP::UserAgent;
use HTTP::Request::Common;
use Data::Dumper;

my $q = CGI->new();
print $q->header;
my $data = $q->param('POSTDATA');
$data = decode_json($data) if $data;

my $query = $data->{'query'};
my $format = $data->{'format'};
my $domain = $data->{'domain'};
my $language = $data->{'language'};

my @UriCollected;

print "Content-type: application/json;\n\n";

#performing crawling here and collecting uri in @UriCollected
print objToJson( { myData => \@UriCollected } );

##</code><code>##

malformed JSON string, neither array, object, number, string or atom, at character offset 0 (before "Content-type: applic...") at