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|
package App::Glacier::Bre;
use strict;
use warnings;
use parent 'Net::Amazon::Glacier';
use App::Glacier::HttpCatch;
use App::Glacier::Signature;
use Carp;
use version 0.77;
use LWP::UserAgent;
use JSON;
sub new {
my ($class, %opts) = @_;
my $region = (delete $opts{region} || _get_instore_region())
or return $class->new_failed('availability region not supplied');
my $access = delete $opts{access};
my ($secret,$token);
if (defined($access)) {
$secret = delete $opts{secret}
or $class->new_failed('secret not supplied');
} else {
($access, $secret, $token) = _get_instore_creds()
or return $class->new_failed('no credentials supplied');
}
my $self = $class->SUPER::new($region, $access, $secret);
if ($token) {
# Overwrite the 'sig' attribute.
# FIXME: The attribute itself is not documented, so this
# method may fail if the internals of the base class change
# in its future releases.
# This approach works with Net::Amazon::Glacier 0.15
$self->{sig} = new App::Glacier::Signature($self->{sig}, $token);
}
return $self;
}
sub new_failed {
my ($class, $message) = @_;
bless { _error => $message }, $class;
}
my $istore_base_url = "http://169.254.169.254/latest/";
my $istore_document_path = "dynamic/instance-identity/document";
my $istore_credentials_path = "meta-data/iam/security-credentials/";
sub _get_instore_region {
my $ua = LWP::UserAgent->new(timeout => 10);
my $response = $ua->get($istore_base_url . $istore_document_path);
unless ($response->is_success) {
return undef;
}
my $doc = JSON->new->decode($response->decoded_content);
return $doc->{region};
}
sub _get_instore_creds {
my $ua = LWP::UserAgent->new(timeout => 10);
my $url = $istore_base_url . $istore_credentials_path;
my $response = $ua->get($url);
unless ($response->is_success) {
return undef;
}
chomp(my $name = $response->decoded_content);
$url .= $name;
$response = $ua->get($url);
unless ($response->is_success) {
return undef;
}
my $doc = JSON->new->decode($response->decoded_content);
return ($doc->{AccessKeyId}, $doc->{SecretAccessKey}, $doc->{Token});
}
# Fix bugs in Net::Amazon::Glacier 0.15
if (version->parse($Net::Amazon::Glacier::VERSION) <= version->parse('0.15')) {
no strict 'refs';
*{__PACKAGE__.'::list_vaults'} = \&list_vaults_fixed;
*{__PACKAGE__.'::get_vault_notifications'} = \&get_vault_notifications_fixed;
}
sub _eval {
my $self = shift;
my $method = shift;
my $wantarray = wantarray;
my $ret = http_catch(sub {
$wantarray ? [ $self->${\$method}(@_) ]
: $self->${\$method}(@_)
},
err => \my %err,
args => \@_);
if (keys(%err)) {
$self->{_last_http_err} = \%err;
} else {
$self->{_last_http_err} = undef;
}
return (wantarray && ref($ret) eq 'ARRAY') ? @$ret : $ret;
}
sub lasterr {
my ($self, $key) = @_;
return $self->{_error} if exists $self->{_error};
return undef unless defined $self->{_last_http_err};
return 1 unless defined $key;
return $self->{_last_http_err}{$key};
}
sub last_error_message {
my ($self) = @_;
return $self->{_error} if exists $self->{_error};
return "No error" unless $self->lasterr;
return $self->lasterr('mesg') || $self->lasterr('text');
}
# list_vaults_fixed
# A fixed version of Net::Amazon::Glacier::list_vaults. This version correctly
# formats the query string in accordance with the specification[1].
# The bug (along with the fix) was reported on December 15, 2018[2].
# Hopefully it will be fixed in further versions of Net::Amazon::Glacier.
# Until then, the initialization code above overrides installs this method
# as list_vaults, if Net::Amazon::Glacier version 0.15 is in use.
#
# [1] https://docs.aws.amazon.com/amazonglacier/latest/dev/api-vaults-get.html
# [2] https://rt.cpan.org/Public/Bug/Display.html?id=128029
sub list_vaults_fixed {
my ($self) = @_;
my @vaults;
# print "using fixed list_vaults\n";
my $marker;
do {
#10 is the default limit, send a marker if needed
my $res = $self->_send_receive(
GET => "/-/vaults?limit=10" . ($marker ? '&marker='.$marker : '')
);
# updated error severity
croak 'list_vaults failed with error ' . $res->status_line unless $res->is_success;
my $decoded = $self->_decode_and_handle_response( $res );
push @vaults, @{$decoded->{VaultList}};
$marker = $decoded->{Marker};
} while ( $marker );
return ( \@vaults );
}
# get_vault_notifications_fixed
# A fixed version of Net::Amazon::Glacier::get_vault_notifications.
# Fixes the use of HTTP method[1].
#
# The bug (along with the fix) was reported on December 15, 2018[2].
# Hopefully it will be fixed in further versions of Net::Amazon::Glacier.
# Until then, the initialization code above overrides installs this method
# as get_vault_notifications, if Net::Amazon::Glacier version 0.15 is in use.
#
# [1] https://docs.aws.amazon.com/amazonglacier/latest/dev/api-vault-notifications-get.html
# [2] https://rt.cpan.org/Public/Bug/Display.html?id=128028
sub get_vault_notifications_fixed {
my ($self, $vault_name, $sns_topic, $events) = @_;
croak "no vault name given" unless $vault_name;
my $res = $self->_send_receive(
GET => "/-/vaults/$vault_name/notification-configuration",
);
# updated error severity
croak 'get_vault_notifications failed with error ' . $res->status_line
unless $res->is_success;
return $self->_decode_and_handle_response( $res );
}
our $AUTOLOAD;
sub AUTOLOAD {
my $self = shift;
croak $self->{_error} if exists $self->{_error};
(my $meth = $AUTOLOAD) =~ s/.*:://;
if ($meth =~ s/^([A-Z])(.*)/\L$1\E$2/) {
return $self->_eval($meth, @_);
}
croak "unknown method $AUTOLOAD";
}
sub DESTROY {}
1;
|
