1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
|
package Business::OnlineThirdPartyPayment::PayPal;
use strict;
use base 'Business::OnlineThirdPartyPayment';
use strict;
use LWP;
use JSON;
use URI;
use Cache::FileCache;
use Crypt::CBC;
our $VERSION = '0.01';
our $ENDPOINT_SANDBOX = 'api.sandbox.paypal.com';
our $ENDPOINT_LIVE = 'api.paypal.com';
our $DEBUG = 0;
sub set_defaults {
my $self = shift;
my %args = @_;
$self->build_subs(qw(username password error_object host access_token));
if ( $args{debug} ) {
$DEBUG = $args{debug};
}
}
sub authenticate {
my $self = shift;
my $host = shift;
die "PayPal client ID (username) must be configured\n"
unless $self->username;
die "PayPay client secret (password) must be configured\n"
unless $self->password;
$self->{cache} = Cache::FileCache->new(
{ cache_root => File::Spec->tmpdir,
namespace => 'BOTP-PayPal' }
);
$self->{cipher} = Crypt::CBC->new( -key => $self->password,
-cipher => 'Blowfish' );
if ( my $token = $self->cache->get($self->username) ) {
$self->access_token( $self->cipher->decrypt($token) );
} else {
my $ua = LWP::UserAgent->new;
my $auth_request = HTTP::Request->new(POST => "$host/v1/oauth2/token");
$auth_request->header('Accept' => 'application/json');
# documentation says application/json; it lies.
$auth_request->header('Content-Type'=>
'application/x-www-form-urlencoded');
$auth_request->authorization_basic( $self->username, $self->password );
$auth_request->content('grant_type=client_credentials');
warn "Sending authentication request.\n" if $DEBUG;
my $auth_response = $ua->request($auth_request);
unless ( $auth_response->is_success ) {
die "Authentication failed: ".$auth_response->status_line."\n".
$auth_response->content;
}
warn "Authentication response:\n".$auth_response->content."\n\n"
if $DEBUG > 2;
my $hash = decode_json($auth_response->content);
my $token = $hash->{access_token};
$self->access_token($token);
$self->cache->set($self->username, $self->cipher->encrypt( $token ),
$hash->{expires_in} - 5);
}
return $self->access_token;
}
sub cache { $_[0]->{cache} }
sub cipher { $_[0]->{cipher} }
sub rest {
my ($self, $path, $content) = @_;
my $host = $self->host;
if ( $self->test_transaction ) {
$host ||= $ENDPOINT_SANDBOX;
} else {
$host ||= $ENDPOINT_LIVE;
}
$host = 'https://'.$host;
my $token = $self->access_token || $self->authenticate($host);
my $ua = LWP::UserAgent->new;
my $json_request = encode_json($content);
warn "REQUEST:\n$json_request\n\n" if $DEBUG >= 2;
my $url = $host . $path;
warn "Sending to $url\n" if $DEBUG;
my $request = HTTP::Request->new(POST => $url);
$request->header('Accept' => 'application/json');
$request->header('Authorization' => "Bearer $token");
$request->header('Content-Type' => 'application/json');
$request->content($json_request);
my $response = $ua->request($request);
if ( !$response ) {
die "API request failed: ".$response->status_line."\n".
$response->content;
}
warn "RESPONSE:" . $response->status_line."\n".$response->content."\n\n"
if $DEBUG >= 2;
if ( $response->is_success ) {
$self->is_success(1);
return decode_json($response->content);
} else {
$self->is_success(0);
if ( $response->content ) {
my $error = decode_json($response->content);
$self->error_object($error);
my $error_message = sprintf("%s: %s",
$error->{'name'}, $error->{'message'});
if ( $error->{'details'} ) {
foreach (@{ $error->{'details'} }) {
$error_message .= sprintf("\n%s:\t%s", $_->{'field'}, $_->{'issue'});
}
}
$self->error_message($error_message);
return $error;
} else {
$self->error_object({});
$self->error_message($response->status_line);
return {};
}
}
}
sub create {
my $self = shift;
my %content = @_;
my $return_url = URI->new($self->return_url)
or die "return_url required";
my $cancel_url = URI->new($self->cancel_url)
or die "cancel_url required";
my $request =
{
intent => 'sale',
payer => {
payment_method => 'paypal',
},
transactions => [
{
amount => {
total => $content{'amount'},
currency => ($content{'currency'} || 'USD'),
},
description => $content{'description'},
},
],
redirect_urls => {
return_url => $return_url->as_string,
cancel_url => $cancel_url->as_string,
},
};
my $response = $self->rest('/v1/payments/payment', $request);
if ( $self->is_success ) {
$self->token($response->{'id'});
my %links = map { $_->{rel} => $_->{href} } @{ $response->{'links'} };
$self->redirect($links{'approval_url'});
# other links are "self", which is where we just posted,
# and "execute_url", which we can determine from the payment id
}
}
sub execute {
my $self = shift;
my %params = @_;
#my $payer_id = $params{'payer_id'} # documentation is wrong here
my $payer_id = $params{'PayerID'}
or die "cannot complete payment: missing PayerID"; #payer_id";
my $request = { 'payer_id' => $payer_id };
$self->order_number($self->token);
my $execute_path = '/v1/payments/payment/' . $self->token. '/execute';
$self->rest($execute_path, $request);
}
1;
__END__
=head1 NAME
Business::OnlineThirdPartyPayment::PayPal
=head1 DESCRIPTION
=head1 AUTHOR
Mark Wells <mark@freeside.biz>
Based in part on Net::PayPal, by Sherzod B. Ruzmetov <sherzodr@cpan.org>.
=head1 SEE ALSO
perl(1). L<Business::OnlineThirdPartyPayment>.
=cut
|
