1 package C4::External::Amazon;
2 # Copyright (C) 2006 LibLime
3 # <jmf at liblime dot com>
5 # This file is part of Koha.
7 # Koha is free software; you can redistribute it and/or modify it under the
8 # terms of the GNU General Public License as published by the Free Software
9 # Foundation; either version 2 of the License, or (at your option) any later
12 # Koha is distributed in the hope that it will be useful, but WITHOUT ANY
13 # WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
14 # A PARTICULAR PURPOSE. See the GNU General Public License for more details.
16 # You should have received a copy of the GNU General Public License along
17 # with Koha; if not, write to the Free Software Foundation, Inc.,
18 # 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
23 use HTTP::Request::Common;
27 use Digest::SHA qw(hmac_sha256_base64);
32 use vars qw($VERSION @ISA @EXPORT);
55 my $locale = C4::Context->preference('AmazonLocale');
56 my $tld = $tld{ $locale } || '.com'; # default top level domain is .com
63 C4::External::Amazon - Functions for retrieving Amazon.com content in Koha
67 This module provides facilities for retrieving Amazon.com content in Koha
71 =item get_amazon_detail( $isbn, $record, $marcflavour, $services )
73 Get editorial reviews, customer reviews, and similar products using Amazon Web Services.
89 MARC flavor, MARC21 or UNIMARC
93 Requested Amazon services: A ref to an array. For example,
94 [ 'Similarities', 'EditorialReviews', 'Reviews' ].
95 No other service will be accepted. Services must be spelled exactly.
96 If no sercice is requested, AWS isn't called.
100 =item get_amazon_tld()
102 Get Amazon Top Level Domain depending on Amazon local preference: AmazonLocal.
103 For example, if AmazonLocal is 'UK', returns '.co.uk'.
110 sub get_amazon_details {
111 my ( $isbn, $record, $marcflavour, $aws_ref ) = @_;
113 return unless defined $aws_ref;
115 return if $#aws == -1;
117 # Normalize the fields
118 $isbn = GetNormalizedISBN($isbn);
119 my $upc = GetNormalizedUPC($record,$marcflavour);
120 my $ean = GetNormalizedEAN($record,$marcflavour);
121 # warn "ISBN: $isbn | UPC: $upc | EAN: $ean";
123 # Choose the appropriate and available item identifier
124 my ( $id_type, $item_id ) =
125 defined($isbn) && length($isbn) == 13 ? ( 'EAN', $isbn ) :
126 $isbn ? ( 'ASIN', $isbn ) :
127 $upc ? ( 'UPC', $upc ) :
128 $ean ? ( 'EAN', $upc ) : ( undef, undef );
129 return unless defined($id_type);
131 # grab the item format to determine Amazon search index
132 my %hformat = ( a => 'Books', g => 'Video', j => 'Music' );
133 my $search_index = $hformat{ substr($record->leader(),6,1) } || 'Books';
135 my $parameters={Service=>"AWSECommerceService" ,
136 "AWSAccessKeyId"=> C4::Context->preference('AWSAccessKeyID') ,
137 "Operation"=>"ItemLookup",
138 "AssociateTag"=> C4::Context->preference('AmazonAssocTag') ,
139 "Version"=>"2009-06-01",
142 "ResponseGroup"=> join( ',', @aws ),
143 "Timestamp"=>strftime("%Y-%m-%dT%H:%M:%SZ", gmtime)
145 $$parameters{"SearchIndex"} = $search_index if $id_type ne 'ASIN';
147 while (my ($key,$value)=each %$parameters){
148 push @params, qq{$key=}.uri_escape($value, "^A-Za-z0-9\-_.~" );
152 if (C4::Context->preference('AWSPrivateKey')) {
153 $url = qq{http://webservices.amazon} . get_amazon_tld() .
154 "/onca/xml?" . join("&",sort @params) . qq{&Signature=} . uri_escape(SignRequest(@params),"^A-Za-z0-9\-_.~" );
156 $url = qq{http://webservices.amazon} . get_amazon_tld() . "/onca/xml?" .join("&",sort @params);
157 warn "MUST set AWSPrivateKey syspref after 2009-08-15 in order to access Amazon web services";
160 my $content = get($url);
161 warn "could not retrieve $url" unless $content;
162 my $xmlsimple = XML::Simple->new();
163 my $response = $xmlsimple->XMLin(
165 forcearray => [ qw(SimilarProduct EditorialReview Review Item) ],
172 my $tld=get_amazon_tld();
173 my $string = qq{GET\nwebservices.amazon$tld\n/onca/xml\n} . join("&",sort @params);
174 return hmac_sha256_base64($string,C4::Context->preference('AWSPrivateKey')) . '=';
177 sub check_search_inside {
179 my $ua = LWP::UserAgent->new(
180 agent => "Mozilla/4.76 [en] (Win98; U)",
185 my $uri = "http://www.amazon.com/gp/reader/$isbn/ref=sib_dp_pt/002-7879865-0184864#reader-link";
186 my $req = HTTP::Request->new(GET => $uri);
188 'Accept' => 'image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, image/png, */*',
189 'Accept-Charset' => 'iso-8859-1,*,utf-8',
190 'Accept-Language' => 'en-US' );
191 my $res = $ua->request($req);
192 my $content = $res->content();
193 if ($content =~ m/This book is temporarily unavailable/) {
208 Joshua Ferraro <jmf@liblime.com>