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https://github.com/xcat2/confluent.git
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Add perl client library for confluent
For applications wishing to use perl to script to confluent, this library facilitates that.
This commit is contained in:
Jarrod Johnson
parent
38f07252f8
commit
36edb24b56
170
confluent_perl/Confluent/Client.pm
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170
confluent_perl/Confluent/Client.pm
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use strict;
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use warnings;
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package Confluent::Client;
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use Confluent::TLV;
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use DB_File;
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use Digest::SHA qw/sha512_hex/;
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use IO::Socket::SSL;
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use IO::Socket::UNIX;
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use MIME::Base64;
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use Net::SSLeay;
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sub get_fingerprint {
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my $pem = Net::SSLeay::PEM_get_string_X509(shift);
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$pem =~ s/-----BEGIN CERTIFICATE-----//;
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$pem =~ s/-----END CERTIFICATE-----//;
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return 'sha512$' . sha512_hex(decode_base64($pem));
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}
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sub parse_nettarget {
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my $target = shift;
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if ($target =~ /^\[(.*)\]:(.*)/) {
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return $1, $2;
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} elsif ($target =~ /^\[(.*)\]$/) {
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return $1, 13001;
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} elsif ($target =~ /^(.*):(.*)$/) {
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return $1, $2;
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} else {
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return $target, 13001;
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}
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}
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sub _verify {
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my $self = shift;
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my $peername = shift;
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my $addfingerprint = shift;
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my $coreverified = shift;
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if ($coreverified) {
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return $coreverified;
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}
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my %knownhosts;
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tie %knownhosts, 'DB_File', glob("~/.confluent/knownhosts");
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my $fingerprint = get_fingerprint($_[3]);
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if ($addfingerprint) {
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$knownhosts{$peername} = $addfingerprint;
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}
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if (not $knownhosts{$peername}) {
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die "UKNNOWN_FINGERPRINT: fingerprint=>$fingerprint"
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}
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if ($fingerprint ne $knownhosts{$peername}) {
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die "CONFLICT_FINGERPRINT: fingerprint=>$fingerprint";
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}
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return 1;
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}
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sub ssl_connect {
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my $self = shift;
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my ($peer, $port) = parse_nettarget(shift);
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my %args = @_;
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my $addfingerprint = undef;
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if ($args{fingerprint}) {
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$addfingerprint = $args{fingerprint};
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}
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# TODO: support typical X509 style when CA present
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my %sslargs = (
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PeerAddr => $peer,
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PeerPort => $port,
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SSL_verify_mode => SSL_VERIFY_PEER,
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SSL_verify_callback =>
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sub { $self->_verify($port."@".$peer, $addfingerprint, @_); },
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SSL_verifycn_scheme => 'none',
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);
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if (1) { # TODO: check for ca location
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# we would do 'undef'. However, older IO::Socket::SSL doesn't do
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# for now, go ahead and tell it to check in a futile manner for
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# certificates before failing into our callback to do knownhosts
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# style
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$sslargs{SSL_ca_path} = '/';
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} else {
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}
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$self->{handle} = IO::Socket::SSL->new(%sslargs);
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unless ($self->{handle}) {
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die "Unable to reach target, $SSL_ERROR/$!";
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}
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}
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sub new {
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my $proto = shift;
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my $class = ref($proto) || $proto;
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my $self = {};
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bless($self, $class);
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my $serverlocation = shift;
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my %args = @_;
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if (not $serverlocation) {
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$serverlocation = "/var/run/confluent/api.sock";
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}
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if (-S $serverlocation) {
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$self->{handle} = IO::Socket::UNIX->new($serverlocation);
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} else { # assume a remote network connection
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$self->{handle} = $self->ssl_connect($serverlocation, @_);
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}
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unless ($self->{handle}) {
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die "General failure connecting $!";
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}
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$self->{server} = Confluent::TLV->new($self->{handle});
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my $banner = $self->{server}->recv();
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my $authdata = $self->{server}->recv();
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$self->{authenticated} = 0;
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if ($authdata->{authpassed}) {
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$self->{authenticated} = 1;
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}
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if ($args{username} and not $self->{authenticated}) {
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$self->authenticate(%args);
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}
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return $self;
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}
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sub authenticate {
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my $self = shift;
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my %args = @_;
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$self->{server}->send({username=>$args{username},
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passphrase=>$args{passphrase}});
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my $authdata = $self->{server}->recv();
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if ($authdata->{authpassed}) {
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$self->{authenticated} = 1;
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}
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}
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sub read {
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my $self = shift;
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my $path = shift;
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my %args = @_;
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return $self->send_request(operation=>'retrieve', path=>$path);
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}
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sub send_request {
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my $self = shift;
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if (not $self->{authenticated}) {
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die "not yet authenticated";
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}
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if ($self->{pending}) {
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die "Cannot submit multiple requests to same object concurrently";
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}
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$self->{pending} = 1;
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my %args = @_;
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my %payload = (
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operation => $args{operation},
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path => $args{path},
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);
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if ($args{parameters}) {
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$payload{parameters} = $args{parameters};
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}
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$self->{server}->send(\%payload);
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}
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sub next_result {
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my $self = shift;
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unless ($self->{pending}) {
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return undef;
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}
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my $result = $self->{server}->recv();
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if (exists $result->{_requestdone}) {
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$self->{pending} = 0;
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}
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return $result;
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}
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1;
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70
confluent_perl/Confluent/TLV.pm
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70
confluent_perl/Confluent/TLV.pm
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@ -0,0 +1,70 @@
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use strict;
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use warnings;
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package Confluent::TLV;
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use JSON;
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sub new {
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my $proto = shift;
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my $class = ref($proto) || $proto;
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my $self = {};
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$self->{handle} = shift;
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$self->{json} = JSON->new;
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bless($self, $class);
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return $self;
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}
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sub recv {
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my $self = shift;
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my $data;
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my $tl = '';
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do {
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sysread($self->{handle}, $data, 4 - length($tl));
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$tl .= $data;
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} while (length($tl) < 4);
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$tl = unpack("N", $tl);
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if ($tl & (1 << 31)) {
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die "Reserved bit used, protocol violated";
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}
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my $length = $tl & 16777215; # lower 24 bits only
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my $datatype = ($tl >> 24);
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my $bytedata = '';
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while (length($bytedata) < $length) {
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sysread($self->{handle}, $data, $length - length($bytedata));
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$bytedata .= $data;
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}
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if ($datatype == 0) {
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return $bytedata;
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} elsif ($datatype == 1) {
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return $self->{json}->utf8->decode($bytedata);
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} else {
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die "Unexpected data type $datatype";
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}
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}
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sub send {
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my $self = shift;
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my $data = shift;
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if (ref $data eq 'HASH') { # Need to do JSON
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my $json = $self->{json}->utf8->encode($data);
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my $typelength = length($json);
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if ($typelength > 16777215) {
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die "Data too large";
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}
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$typelength |= 16777216;
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my $handle = $self->{handle};
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print $handle pack("N", $typelength) . $json;
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$self->{handle}->flush();
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} elsif (not ref $data) { # text data
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my $typelength = length($data);
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if ($typelength > 16777215) {
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die "Data too large";
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}
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my $handle = $self->{handle};
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print $handle pack("N", $typelength) . $data;
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$self->{handle}->flush();
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}
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}
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1;
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14
confluent_perl/example.pl
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14
confluent_perl/example.pl
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use strict;
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use warnings;
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use Confluent::Client;
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my $client = Confluent::Client->new();
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$client->read('/nodes/n1/power/state');
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my $data = $client->next_result();
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while ($data) {
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if (exists $data->{state}) {
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print $data->{state}->{value} . "\n";
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}
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$data = $client->next_result();
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}
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