| 1 | ################################################################################
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| 2 | #
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| 3 | # HDThriftFS.pm -- file functions acting upon a HDFS via thrift
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| 4 | #
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| 5 | # A component of the Greenstone digital library software from the New Zealand
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| 6 | # Digital Library Project at the University of Waikato, New Zealand.
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| 7 | #
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| 8 | # Copyright (C) 2013 New Zealand Digital Library Project
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| 9 | #
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| 10 | # This program is free software; you can redistribute it and/or modify it under
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| 11 | # the terms of the GNU General Public License as published by the Free Software
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| 12 | # Foundation; either version 2 of the License, or (at your option) any later
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| 13 | # version.
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| 14 | #
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| 15 | # This program is distributed in the hope that it will be useful, but WITHOUT
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| 16 | # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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| 17 | # FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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| 18 | # details.
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| 19 | #
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| 20 | # You should have received a copy of the GNU General Public License along with
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| 21 | # this program; if not, write to the Free Software Foundation, Inc., 675 Mass
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| 22 | # Ave, Cambridge, MA 02139, USA.
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| 23 | #
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| 24 | ###############################################################################
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| 25 |
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| 26 | # Thrift acts as client-server 'relay' between the Perl code and the HDFS. It
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| 27 | # allows for persistant connections and so is significantly faster than
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| 28 | # repeatedly starting Hadoop's Java application over and over. In order to
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| 29 | # connect to the Thrift server this code needs to know the host and port the
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| 30 | # server may be found on - information currently hard-coded near the top of the
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| 31 | # script. There are also a number of Perl module API 'bindings' generated by
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| 32 | # the Thrift compilation process... currently located within the packages of
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| 33 | # the Parallel Processing extension. Note that I make use of some tie() magic
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| 34 | # so as to provide calling code with 'file handle'-like objects to interact
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| 35 | # with (print, readline etc), so that is pretty cool.
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| 36 |
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| 37 | package FileUtils::HDThriftFS;
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| 38 |
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| 39 | # Pragma
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| 40 | use strict;
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| 41 |
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| 42 | # Setup Environment
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| 43 | BEGIN
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| 44 | {
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| 45 | die "GEXTPARALLELBUILDING not set\n" unless defined $ENV{'GEXTPARALLELBUILDING'};
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| 46 | die "GSDLOS not set\n" unless defined $ENV{'GSDLOS'};
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| 47 | die "GSDLCOLLECTDIR not set\n" unless defined $ENV{'GSDLCOLLECTDIR'};
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| 48 | # We need the Perl version before continuing
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| 49 | if (!defined $ENV{'PERL_VERSION'})
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| 50 | {
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| 51 | $ENV{'PERL_VERSION'} = `perl -S $ENV{'GEXTPARALLELBUILDING'}/bin/script/perl-version.pl`;
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| 52 | }
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| 53 | die "PERL_VERSION not set\n" unless defined $ENV{'PERL_VERSION'};
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| 54 | # Bit::Vector and Thrift modules
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| 55 | unshift (@INC, $ENV{'GEXTPARALLELBUILDING'} . '/' . $ENV{'GSDLOS'} . '/lib/perl/' . $ENV{'PERL_VERSION'});
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| 56 | # ThriftFS Perl API
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| 57 | unshift (@INC, $ENV{'GEXTPARALLELBUILDING'} . '/packages/ThriftFS-0.9.0/gen-perl');
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| 58 | }
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| 59 |
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| 60 | # Modules - Core
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| 61 | use Devel::Peek;
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| 62 | use MIME::Base64;
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| 63 | use POSIX qw(floor);
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| 64 | use Symbol;
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| 65 | use Thrift::Socket;
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| 66 | use Thrift::BufferedTransport;
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| 67 | use Thrift::BinaryProtocol;
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| 68 | # Modules - Thrift
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| 69 | use HadoopFS::FileSystem;
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| 70 | # Modules - Greenstone
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| 71 | use FileUtils::HDThriftFS::ThriftFH;
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| 72 | use MIME::Base91;
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| 73 |
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| 74 | # Configuration
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| 75 | my $host = "localhost";
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| 76 | my $port = 58660;
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| 77 | my $debug = 0;
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| 78 | my $debug_encoding = 0;
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| 79 | # Testing shows 64k is pretty optimal
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| 80 | #my $buffer_length = 4 * 1024; # 4k blocks
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| 81 | #my $buffer_length = 8 * 1024; # 8k blocks
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| 82 | #my $buffer_length = 16 * 1024; # 16K blocks
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| 83 | #my $buffer_length = 32 * 1024; # 32k blocks
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| 84 | #my $buffer_length = 64 * 1024; # 64k blocks
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| 85 | #my $buffer_length = 128 * 1024; # 128k blocks
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| 86 | #my $buffer_length = 256 * 1024; # 256k blocks
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| 87 | my $buffer_length = 512 * 1024; # 512k blocks
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| 88 | #my $buffer_length = 1024 * 1024; # 1M blocks
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| 89 | #my $buffer_length = 2048 * 1024; # 2M blocks
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| 90 | ## These cause "OUT OF MEMORY" errors on Medusa
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| 91 | #my $buffer_length = 4096 * 1024; # 4M blocks
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| 92 | #my $buffer_length = 8192 * 1024; # 8M blocks
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| 93 |
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| 94 | # Globals
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| 95 | my $transport;
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| 96 | my $thrift_client;
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| 97 |
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| 98 |
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| 99 | ## @function END()
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| 100 | #
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| 101 | # Ensure the transport layer, if open, is properly closed
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| 102 | #
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| 103 | END
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| 104 | {
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| 105 | if (defined $transport)
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| 106 | {
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| 107 | $transport->close();
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| 108 | }
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| 109 | }
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| 110 | ## END()
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| 111 |
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| 112 |
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| 113 | ## @function _establishClient()
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| 114 | #
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| 115 | sub _establishClient
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| 116 | {
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| 117 | if (!defined $thrift_client)
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| 118 | {
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| 119 | # Look for a configuration file to override the default localhost:58660
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| 120 | # settings
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| 121 | my $conf_file_path = &FileUtils::filenameConcatenate($ENV{'GSDLCOLLECTDIR'}, 'etc', 'thrift.conf');
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| 122 | if (&FileUtils::fileExists($conf_file_path))
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| 123 | {
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| 124 | print " * Found Thrift configuration file:\n";
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| 125 | my $conf_raw = &FileUtils::fileGetContents($conf_file_path);
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| 126 | if ($conf_raw =~ /^([^:]+):(\d+)/)
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| 127 | {
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| 128 | $host = $1;
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| 129 | print " - Host: " . $host . "\n";
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| 130 | $port = $2;
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| 131 | print " - Port: " . $port . "\n";
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| 132 | }
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| 133 | }
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| 134 |
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| 135 | print " * Creating Thrift client connected to: $host:$port\n";
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| 136 | my $socket = Thrift::Socket->new($host, $port);
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| 137 | $socket->setSendTimeout(10000);
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| 138 | $socket->setRecvTimeout(20000);
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| 139 |
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| 140 | $transport = Thrift::BufferedTransport->new($socket);
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| 141 | my $protocol = Thrift::BinaryProtocol->new($transport);
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| 142 | $thrift_client = HadoopFS::FileSystemClient->new($protocol);
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| 143 |
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| 144 | eval { $transport->open(); };
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| 145 | if ($@)
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| 146 | {
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| 147 | &FileUtils::printError('Unable to connect: ' . $@->{message}, 1);
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| 148 | }
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| 149 | }
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| 150 | }
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| 151 | ## _establishClient()
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| 152 |
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| 153 |
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| 154 | ## @function _generateHDFSPath()
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| 155 | #
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| 156 | sub _generateHDFSPath
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| 157 | {
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| 158 | my ($path) = @_;
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| 159 | if (ref($path) ne 'HadoopFS::Pathname')
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| 160 | {
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| 161 | if ($path !~ /HDThriftFS:\/\//)
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| 162 | {
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| 163 | &FileUtils::printError('Not a valid thrift URI: ' . $path);
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| 164 | }
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| 165 | else
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| 166 | {
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| 167 | # Remove protocol and any host and port information
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| 168 | $path =~ s/HDThriftFS:\/\/[^\/]*//;
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| 169 | $path = HadoopFS::Pathname->new( { pathname => $path } );
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| 170 | }
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| 171 | }
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| 172 | return $path;
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| 173 | }
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| 174 | ## _generateHDFSPath()
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| 175 |
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| 176 |
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| 177 | ## @function _printDebug()
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| 178 | #
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| 179 | sub _printDebug
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| 180 | {
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| 181 | my ($msg) = @_;
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| 182 | if ($debug)
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| 183 | {
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| 184 | my ($package, $filename, $line, $function) = caller(1);
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| 185 | print STDERR '[DEBUG] ' . $function . ': ' . $msg . "\n";
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| 186 | }
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| 187 | }
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| 188 | ## _printDebug()
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| 189 |
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| 190 | ################################################################################
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| 191 | ################################################################################
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| 192 | ################################################################################
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| 193 |
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| 194 |
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| 195 | ## @function canRead()
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| 196 | #
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| 197 | sub canRead
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| 198 | {
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| 199 | my $path = shift(@_);
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| 200 | return &checkPermission($path, 'r', @_);
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| 201 | }
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| 202 | ## canRead()
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| 203 |
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| 204 |
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| 205 | ## @function checkPermission()
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| 206 | #
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| 207 | sub checkPermission
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| 208 | {
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| 209 | my ($path, $mode, $username, $usergroup) = @_;
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| 210 | my $offsets = {'r' => 0, 'w' => 1, 'x' => 2};
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| 211 | # - ensure we have a connection to the thrift server
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| 212 | &_establishClient();
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| 213 | # - convert the path into a proper thrift path object
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| 214 | $path = &_generateHDFSPath($path);
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| 215 | # - determine the user (defaults to current user)
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| 216 | if (!defined $username)
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| 217 | {
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| 218 | if ($ENV{'GSDLOS'} =~ /^windows$/i)
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| 219 | {
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| 220 | require Win32;
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| 221 | $username = Win32::LoginName();
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| 222 | }
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| 223 | else
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| 224 | {
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| 225 | $username = getlogin || getpwuid($<);
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| 226 | }
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| 227 | }
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| 228 | # - determine the group
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| 229 | my $usergroups = {};
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| 230 | if (defined $usergroup)
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| 231 | {
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| 232 | $usergroups = (ref $usergroup eq "HASH") ? $usergroup : {$usergroup => 1};
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| 233 | }
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| 234 | else
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| 235 | {
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| 236 | if ($ENV{'GSDLOS'} =~ /^windows$/i)
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| 237 | {
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| 238 | # dunno
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| 239 | }
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| 240 | else
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| 241 | {
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| 242 | my $raw_groups = `groups`;
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| 243 | foreach my $group ( split(/\s/, $raw_groups))
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| 244 | {
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| 245 | $usergroups->{$group} = 1;
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| 246 | }
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| 247 | }
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| 248 | }
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| 249 | # Retrieve details from the file
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| 250 | my $file_stat = $thrift_client->stat($path);
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| 251 | my $owner = $file_stat->{'owner'};
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| 252 | my $group = $file_stat->{'group'};
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| 253 | my $permissions = $file_stat->{'permission'};
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| 254 | # Begin the cascade of tests to determine if the identified user belonging to
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| 255 | # the identified group can perform 'mode' access to the file.
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| 256 | my $has_permission = 0;
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| 257 | # - start with [u]ser permission
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| 258 | if (defined $owner && $username eq $owner)
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| 259 | {
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| 260 | my $target_char = substr($permissions, $offsets->{$mode}, 1);
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| 261 | if ($mode eq $target_char)
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| 262 | {
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| 263 | $has_permission = 1;
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| 264 | }
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| 265 | }
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| 266 | # - failing that, try [g]roup level permissions
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| 267 | if (!$has_permission && defined $group && defined $usergroups->{$group})
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| 268 | {
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| 269 | my $target_char = substr($permissions, 3 + $offsets->{$mode}, 1);
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| 270 | if ($mode eq $target_char)
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| 271 | {
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| 272 | $has_permission = 1;
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| 273 | }
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| 274 | }
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| 275 | # - and finally try [o]ther level permission
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| 276 | if (!$has_permission)
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| 277 | {
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| 278 | my $target_char = substr($permissions, 6 + $offsets->{$mode}, 1);
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| 279 | if ($mode eq $target_char)
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| 280 | {
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| 281 | $has_permission = 1;
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| 282 | }
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| 283 | }
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| 284 | return $has_permission;
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| 285 | }
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| 286 | ## checkPermission
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| 287 |
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| 288 |
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| 289 | ## @function closeFileHandle()
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| 290 | #
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| 291 | sub closeFileHandle
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| 292 | {
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| 293 | my $fh_ref = shift(@_);
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| 294 | &_printDebug('');
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| 295 | close($$fh_ref);
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| 296 | untie($$fh_ref);
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| 297 | return 1;
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| 298 | }
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| 299 | ## closeFileHandle()
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| 300 |
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| 301 |
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| 302 | ## @function fileSize()
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| 303 | #
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| 304 | sub fileSize
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| 305 | {
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| 306 | my ($path, $test_op) = @_;
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| 307 | # ensure we have a connection to the thrift server
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| 308 | &_establishClient();
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| 309 | # - convert the path into a proper thrift path object
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| 310 | $path = &_generateHDFSPath($path);
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| 311 | my $file_stat = $thrift_client->stat($path);
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| 312 | return $file_stat->{length};
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| 313 | }
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| 314 | ## fileSize()
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| 315 |
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| 316 |
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| 317 | ## @function fileTest()
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| 318 | #
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| 319 | sub fileTest
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| 320 | {
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| 321 | my ($raw_path, $test_op) = @_;
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| 322 | my $result = 0;
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| 323 | # ensure we have a connection to the thrift server
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| 324 | &_establishClient();
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| 325 | # - convert the path into a proper thrift path object
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| 326 | my $path = &_generateHDFSPath($raw_path);
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| 327 | # note: symbolic linking not supported within HDFS
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| 328 | if (!defined $test_op || $test_op eq '-l')
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| 329 | {
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| 330 | $test_op = '-e';
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| 331 | }
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| 332 | if ($test_op eq '-d')
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| 333 | {
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| 334 | if ($thrift_client->exists($path))
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| 335 | {
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| 336 | my $file = $thrift_client->stat($path);
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| 337 | if ($file->{'isdir'})
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| 338 | {
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| 339 | $result = 1;
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| 340 | }
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| 341 | }
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| 342 | }
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| 343 | elsif ($test_op eq '-e')
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| 344 | {
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| 345 | if ($thrift_client->exists($path))
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| 346 | {
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| 347 | $result = 1;
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| 348 | }
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| 349 | }
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| 350 | elsif ($test_op eq '-f')
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| 351 | {
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| 352 | if ($thrift_client->exists($path))
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| 353 | {
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| 354 | my $file = $thrift_client->stat($path);
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| 355 | if (!$file->{'isdir'})
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| 356 | {
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| 357 | $result = 1;
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| 358 | }
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| 359 | }
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| 360 | }
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| 361 | else
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| 362 | {
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| 363 | &FileUtils::printError('Unknown or unsupported test mode: ' . $test_op);
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| 364 | }
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| 365 | return $result;
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| 366 | }
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| 367 | ## fileTest()
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| 368 |
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| 369 |
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| 370 | ## @function filenameConcatenate()
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| 371 | #
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| 372 | sub filenameConcatenate
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| 373 | {
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| 374 | my $protocol = shift(@_);
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| 375 | my $filename = join('/', @_);
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| 376 | # remove repeated slashes
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| 377 | $filename =~ s/[\/]+/\//g;
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| 378 | # append protocol (which may cause multiple slashes)
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| 379 | $filename = $protocol . '/' . $filename;
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| 380 | # strip any trailing slashes
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| 381 | $filename =~ s/[\\\/]$//;
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| 382 | return $filename;
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| 383 | }
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| 384 | ## filenameConcatenate()
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| 385 |
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| 386 |
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| 387 | ## @function isFilenameAbsolute()
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| 388 | #
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| 389 | sub isFilenameAbsolute
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| 390 | {
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| 391 | # File paths against HDFS must be.
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| 392 | return 1;
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| 393 | }
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| 394 | # isFilenameAbsolute()
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| 395 |
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| 396 |
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| 397 | ## @function isHDFS
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| 398 | #
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| 399 | sub isHDFS
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| 400 | {
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| 401 | return 1;
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| 402 | }
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| 403 | ## isHDFS()
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| 404 |
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| 405 |
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| 406 | ## @function makeDirectory()
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| 407 | #
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| 408 | sub makeDirectory
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| 409 | {
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| 410 | my ($raw_path) = @_;
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| 411 | my $result = 0;
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| 412 | # ensure we have a connection to the thrift server
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| 413 | &_establishClient();
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| 414 | # - convert the path into a proper thrift path object
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| 415 | my $path = &_generateHDFSPath($raw_path);
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| 416 | if (!&fileTest($path, '-d'))
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| 417 | {
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| 418 | # - create the directory
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| 419 | $thrift_client->mkdirs($path);
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| 420 | }
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| 421 | # - check that it exists
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| 422 | return (&fileTest($path, '-d'));
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| 423 | }
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| 424 | ## makeDirectory()
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| 425 |
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| 426 |
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| 427 | ## @function modificationTime()
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| 428 | #
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| 429 | sub modificationTime
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| 430 | {
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| 431 | my ($path) = @_;
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| 432 | # ensure we have a connection to the thrift server
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| 433 | &_establishClient();
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| 434 | # - convert the path into a proper thrift path object
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| 435 | $path = &_generateHDFSPath($path);
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| 436 | my $file_stat = $thrift_client->stat($path);
|
|---|
| 437 | return floor($file_stat->{modificationTime} / 1000);
|
|---|
| 438 | }
|
|---|
| 439 | ## modificationTime()
|
|---|
| 440 |
|
|---|
| 441 |
|
|---|
| 442 | ## @function openFileHandle()
|
|---|
| 443 | #
|
|---|
| 444 | sub openFileHandle
|
|---|
| 445 | {
|
|---|
| 446 | my ($raw_path, $mode, $fh_ref) = @_;
|
|---|
| 447 | &_printDebug('path: ' . $raw_path . ', mode: ' . $mode . ', fh_ref');
|
|---|
| 448 | # ensure we have a connection to the thrift server
|
|---|
| 449 | &_establishClient();
|
|---|
| 450 | #rint STDERR "DEBUG: openFileHandle($raw_path, $mode, fh_ref)\n";
|
|---|
| 451 | my $path = &_generateHDFSPath($raw_path);
|
|---|
| 452 | my $fh = gensym();
|
|---|
| 453 | tie(*$fh, "FileUtils::HDThriftFS::ThriftFH", $thrift_client);
|
|---|
| 454 | open($fh, $path, $mode) or die("Failed to open thriftfs");
|
|---|
| 455 | $$fh_ref = $fh;
|
|---|
| 456 | return 1;
|
|---|
| 457 | }
|
|---|
| 458 | ## openFileHandle()
|
|---|
| 459 |
|
|---|
| 460 |
|
|---|
| 461 | ## @function readDirectory()
|
|---|
| 462 | #
|
|---|
| 463 | sub readDirectory
|
|---|
| 464 | {
|
|---|
| 465 | my ($raw_path) = @_;
|
|---|
| 466 | my @files;
|
|---|
| 467 | # ensure we have a connection to the thrift server
|
|---|
| 468 | &_establishClient();
|
|---|
| 469 | my $path = &_generateHDFSPath($raw_path);
|
|---|
| 470 | my $raw_files = $thrift_client->listStatus($path);
|
|---|
| 471 | if ($raw_files && @{$raw_files} > 0)
|
|---|
| 472 | {
|
|---|
| 473 | foreach my $file_stat (@{$raw_files})
|
|---|
| 474 | {
|
|---|
| 475 | my $file_path = $file_stat->{'path'};
|
|---|
| 476 | my ($filename) = $file_path =~ /([^\\\/]+)$/;
|
|---|
| 477 | push(@files, $filename);
|
|---|
| 478 | }
|
|---|
| 479 | }
|
|---|
| 480 | return \@files;
|
|---|
| 481 | }
|
|---|
| 482 | ## readDirectory()
|
|---|
| 483 |
|
|---|
| 484 |
|
|---|
| 485 | ## @function removeFiles()
|
|---|
| 486 | #
|
|---|
| 487 | sub removeFiles
|
|---|
| 488 | {
|
|---|
| 489 | my ($path, $recursive) = @_;
|
|---|
| 490 | my $result = 0;
|
|---|
| 491 | if (!defined $recursive)
|
|---|
| 492 | {
|
|---|
| 493 | $recursive = 0;
|
|---|
| 494 | }
|
|---|
| 495 | # ensure we have a connection to the thrift server
|
|---|
| 496 | &_establishClient();
|
|---|
| 497 | # - convert the path into a proper thrift path object as necessary
|
|---|
| 498 | $path = &_generateHDFSPath($path);
|
|---|
| 499 | if ($thrift_client->exists($path) && ($recursive || &fileTest($path, '-f')))
|
|---|
| 500 | {
|
|---|
| 501 | $thrift_client->rm($path, $recursive);
|
|---|
| 502 | $result = !$thrift_client->exists($path);
|
|---|
| 503 | }
|
|---|
| 504 | return $result;
|
|---|
| 505 | }
|
|---|
| 506 | ## removeFiles()
|
|---|
| 507 |
|
|---|
| 508 |
|
|---|
| 509 | ## @function removeFilesFiltered()
|
|---|
| 510 | #
|
|---|
| 511 | sub removeFilesFiltered
|
|---|
| 512 | {
|
|---|
| 513 | my ($paths, $accept_re, $reject_re) = @_;
|
|---|
| 514 | # ensure we have a connection to the thrift server
|
|---|
| 515 | &_establishClient();
|
|---|
| 516 | # Perform a depth first, recursive, removal of files and directories that
|
|---|
| 517 | # match the given accept and reject patterns
|
|---|
| 518 | my @paths_array = (ref $paths eq "ARRAY") ? @$paths : ($paths);
|
|---|
| 519 | my $num_removed = 0;
|
|---|
| 520 | foreach my $raw_path (@paths_array)
|
|---|
| 521 | {
|
|---|
| 522 | # remove trailing slashes
|
|---|
| 523 | $raw_path =~ s/[\/\\]+$//;
|
|---|
| 524 | my $path = &_generateHDFSPath($raw_path);
|
|---|
| 525 | if (!$thrift_client->exists($path))
|
|---|
| 526 | {
|
|---|
| 527 | print STDERR "HDThriftFS::removeFilesFiltered() path does not exist: " . $raw_path . "\n";
|
|---|
| 528 | }
|
|---|
| 529 | elsif (&fileTest($path, '-d'))
|
|---|
| 530 | {
|
|---|
| 531 | my @files = @{&readDirectory($path)};
|
|---|
| 532 | foreach my $file (@files)
|
|---|
| 533 | {
|
|---|
| 534 | my $child_path = $raw_path . '/' . $file;
|
|---|
| 535 | $num_removed += &removeFilesFiltered($child_path, $accept_re, $reject_re);
|
|---|
| 536 | }
|
|---|
| 537 | if (!defined $accept_re && !defined $reject_re)
|
|---|
| 538 | {
|
|---|
| 539 | # remove this directory - non-recursively so that the command fails
|
|---|
| 540 | # if there are (somehow) still files contained within
|
|---|
| 541 | $thrift_client->rm($path, 0);
|
|---|
| 542 | if ($thrift_client->exists($path))
|
|---|
| 543 | {
|
|---|
| 544 | print STDERR "HDThriftFS::removeFilesFiltered() couldn't remove directory: " . $raw_path . "\n";
|
|---|
| 545 | }
|
|---|
| 546 | else
|
|---|
| 547 | {
|
|---|
| 548 | $num_removed++;
|
|---|
| 549 | }
|
|---|
| 550 | }
|
|---|
| 551 | }
|
|---|
| 552 | else
|
|---|
| 553 | {
|
|---|
| 554 | if (defined $reject_re && ($raw_path =~ m/$reject_re/))
|
|---|
| 555 | {
|
|---|
| 556 | next;
|
|---|
| 557 | }
|
|---|
| 558 | if ((!defined $accept_re) || ($raw_path =~ m/$accept_re/))
|
|---|
| 559 | {
|
|---|
| 560 | # remove this file
|
|---|
| 561 | $thrift_client->rm($path, 0);
|
|---|
| 562 | if ($thrift_client->exists($path))
|
|---|
| 563 | {
|
|---|
| 564 | print STDERR "HDThriftFS::removeFilesFiltered() couldn't remove file: " . $raw_path . "\n";
|
|---|
| 565 | }
|
|---|
| 566 | else
|
|---|
| 567 | {
|
|---|
| 568 | $num_removed++;
|
|---|
| 569 | }
|
|---|
| 570 | }
|
|---|
| 571 | }
|
|---|
| 572 | }
|
|---|
| 573 | return $num_removed;
|
|---|
| 574 | }
|
|---|
| 575 | ## removeFilesFiltered()
|
|---|
| 576 |
|
|---|
| 577 |
|
|---|
| 578 | ## @function removeFilesRecursive()
|
|---|
| 579 | #
|
|---|
| 580 | sub removeFilesRecursive
|
|---|
| 581 | {
|
|---|
| 582 | my ($path) = @_;
|
|---|
| 583 | # use the more general removeFilesFiltered() function with no accept or reject
|
|---|
| 584 | # expressions
|
|---|
| 585 | return &removeFilesFiltered($path, undef, undef);
|
|---|
| 586 | }
|
|---|
| 587 | ## removeFilesRecursive()
|
|---|
| 588 |
|
|---|
| 589 |
|
|---|
| 590 | ## @function supportsSymbolicLink
|
|---|
| 591 | #
|
|---|
| 592 | sub supportsSymbolicLink
|
|---|
| 593 | {
|
|---|
| 594 | return 0;
|
|---|
| 595 | }
|
|---|
| 596 | ## supportsSymbolicLink()
|
|---|
| 597 |
|
|---|
| 598 |
|
|---|
| 599 | ## @function transferFile()
|
|---|
| 600 | #
|
|---|
| 601 | sub transferFile
|
|---|
| 602 | {
|
|---|
| 603 | my ($mode, $src, $dst) = @_;
|
|---|
| 604 | # ensure we have a connection to the thrift server
|
|---|
| 605 | &_establishClient();
|
|---|
| 606 | #rint STDERR "transferFile($mode, $src, $dst)\n";
|
|---|
| 607 | my $src_path = &_generateHDFSPath($src);
|
|---|
| 608 | my $dst_path = &_generateHDFSPath($dst);
|
|---|
| 609 | if (&fileTest($dst_path, '-d'))
|
|---|
| 610 | {
|
|---|
| 611 | my ($filename) = $src =~ /([^\\\/]+)$/;
|
|---|
| 612 | $dst .= '/' . $filename;
|
|---|
| 613 | $dst_path = &_generateHDFSPath($dst);
|
|---|
| 614 | }
|
|---|
| 615 | if (!$thrift_client->exists($src_path))
|
|---|
| 616 | {
|
|---|
| 617 | &FileUtils::printError('Source file (during ' . $mode . ') does not exist: ' . $src);
|
|---|
| 618 | return 0;
|
|---|
| 619 | }
|
|---|
| 620 | if ($thrift_client->exists($dst_path))
|
|---|
| 621 | {
|
|---|
| 622 | &FileUtils::printError('Destination file (during ' . $mode . ') already exists: ' . $dst);
|
|---|
| 623 | return 0;
|
|---|
| 624 | }
|
|---|
| 625 | # what happens next depends on the mode, and is either very easy or really
|
|---|
| 626 | # hard
|
|---|
| 627 | if ($mode eq 'MOVE')
|
|---|
| 628 | {
|
|---|
| 629 | $thrift_client->rename($src_path, $dst_path);
|
|---|
| 630 | }
|
|---|
| 631 | elsif ($mode eq 'COPY')
|
|---|
| 632 | {
|
|---|
| 633 | # Open the src file for reading
|
|---|
| 634 | #rint STDERR "DEBUG: FHIN opened (should be 'r'): $src\n";
|
|---|
| 635 | my $fhin = $thrift_client->open($src_path);
|
|---|
| 636 | # Create the dst file for writing
|
|---|
| 637 | #rint STDERR "DEBUG: FHOUT created (should be 'w'): $dst\n";
|
|---|
| 638 | my $fhout = $thrift_client->create($dst_path);
|
|---|
| 639 | # Read all of src file writing to dst file
|
|---|
| 640 | # - this is where things have the potential to go wrong, as it doesn't seem
|
|---|
| 641 | # thrift supports writing bytes
|
|---|
| 642 | # - only strings. May need to see if I can make Perl behave using black
|
|---|
| 643 | # magic flags (marking string as binary etc) It'll work fine for text
|
|---|
| 644 | # files though
|
|---|
| 645 | my $data = undef;
|
|---|
| 646 | my $offset = 0;
|
|---|
| 647 | # Read 4K blocks at a time
|
|---|
| 648 | while ($data = $thrift_client->read($fhin, $offset, $buffer_length))
|
|---|
| 649 | {
|
|---|
| 650 | $thrift_client->write($fhout, $data);
|
|---|
| 651 | $offset += $buffer_length;
|
|---|
| 652 | if (length ($data) < $buffer_length)
|
|---|
| 653 | {
|
|---|
| 654 | last;
|
|---|
| 655 | }
|
|---|
| 656 | }
|
|---|
| 657 | # Close files
|
|---|
| 658 | $thrift_client->close($fhout);
|
|---|
| 659 | $thrift_client->close($fhin);
|
|---|
| 660 | }
|
|---|
| 661 | my $result = ($thrift_client->exists($dst_path));
|
|---|
| 662 | #rint STDERR "transferFile() => $result\n";
|
|---|
| 663 | return $result;
|
|---|
| 664 | }
|
|---|
| 665 | ## transferFile()
|
|---|
| 666 |
|
|---|
| 667 |
|
|---|
| 668 | ## @function transferFileFromLocal()
|
|---|
| 669 | #
|
|---|
| 670 | sub transferFileFromLocal
|
|---|
| 671 | {
|
|---|
| 672 | my ($mode, $src, $dst) = @_;
|
|---|
| 673 | # ensure we have a connection to the thrift server
|
|---|
| 674 | &_establishClient();
|
|---|
| 675 | # destination is remote
|
|---|
| 676 | my $dst_path = &_generateHDFSPath($dst);
|
|---|
| 677 | if (&fileTest($dst_path, '-d'))
|
|---|
| 678 | {
|
|---|
| 679 | my ($filename) = $src =~ /([^\\\/]+)$/;
|
|---|
| 680 | $dst .= '/' . $filename;
|
|---|
| 681 | $dst_path = &_generateHDFSPath($dst);
|
|---|
| 682 | }
|
|---|
| 683 | # can't replace - if the file already exists
|
|---|
| 684 | if (&fileTest($dst_path, '-f'))
|
|---|
| 685 | {
|
|---|
| 686 | &FileUtils::printError('Destination file (during ' . $mode . ') already exists: ' . $dst);
|
|---|
| 687 | return 0;
|
|---|
| 688 | }
|
|---|
| 689 | # copy the file
|
|---|
| 690 | my $fhin;
|
|---|
| 691 | open($fhin, '<:raw', $src) or die("Failed to open file for reading: " . $src . " (" . $! . ")");
|
|---|
| 692 | my $decoded = '';
|
|---|
| 693 | my $fhout = $thrift_client->create($dst_path);
|
|---|
| 694 | while (read($fhin, $decoded, $buffer_length))
|
|---|
| 695 | {
|
|---|
| 696 | if ($debug_encoding)
|
|---|
| 697 | {
|
|---|
| 698 | print STDERR "Writing Data: \n=== START ===\n"; Dump($decoded); print STDERR "\n=== END ===\n\n";
|
|---|
| 699 | }
|
|---|
| 700 | # Base64 encode to protect binary
|
|---|
| 701 | #my $encoded = encode_base64($decoded);
|
|---|
| 702 | # Base91 encode to protect binary - we add a Byte Order Marker so the
|
|---|
| 703 | # Thrift Server can detect the need to decode the string sent
|
|---|
| 704 | my $encoded = MIME::Base91::encode($decoded);
|
|---|
| 705 | if ($debug_encoding)
|
|---|
| 706 | {
|
|---|
| 707 | print STDERR "Encoded: \n=== START ===\n"; Dump($encoded); print STDERR "\n=== END ===\n\n";
|
|---|
| 708 | }
|
|---|
| 709 | $thrift_client->write($fhout, $encoded);
|
|---|
| 710 | }
|
|---|
| 711 | close($fhin);
|
|---|
| 712 | $thrift_client->close($fhout);
|
|---|
| 713 | # in general, the transfer has worked if the destination file exists
|
|---|
| 714 | my $result = $thrift_client->exists($dst_path);
|
|---|
| 715 | # if moving, remove the source file from the local filesystem
|
|---|
| 716 | if ($mode eq 'MOVE')
|
|---|
| 717 | {
|
|---|
| 718 | unlink($src);
|
|---|
| 719 | # update result to reflect if we successfully removed the src file
|
|---|
| 720 | $result = $result && (!-f $src);
|
|---|
| 721 | }
|
|---|
| 722 | return $result
|
|---|
| 723 | }
|
|---|
| 724 | ## transferFileFromLocal()
|
|---|
| 725 |
|
|---|
| 726 |
|
|---|
| 727 | ## @function transferFileToLocal()
|
|---|
| 728 | #
|
|---|
| 729 | sub transferFileToLocal
|
|---|
| 730 | {
|
|---|
| 731 | my ($mode, $src, $dst) = @_;
|
|---|
| 732 | # ensure we have a connection to the thrift server
|
|---|
| 733 | &_establishClient();
|
|---|
| 734 | # source is remote
|
|---|
| 735 | my $src_path = &_generateHDFSPath($src);
|
|---|
| 736 | if (!$thrift_client->exists($src_path))
|
|---|
| 737 | {
|
|---|
| 738 | &FileUtils::printError('Source file (during ' . $mode . ') does not exist: ' . $src);
|
|---|
| 739 | return 0;
|
|---|
| 740 | }
|
|---|
| 741 | if (-d $dst)
|
|---|
| 742 | {
|
|---|
| 743 | my ($filename) = $src =~ /([^\\\/]+)$/;
|
|---|
| 744 | $dst .= '/' . $filename;
|
|---|
| 745 | }
|
|---|
| 746 | if (-e $dst)
|
|---|
| 747 | {
|
|---|
| 748 | &FileUtils::printError('Destination file (during ' . $mode . ') already exists: ' . $dst);
|
|---|
| 749 | return 0;
|
|---|
| 750 | }
|
|---|
| 751 | # open local file
|
|---|
| 752 | my $fhout;
|
|---|
| 753 | my $encoded = undef;
|
|---|
| 754 | my $offset = 0;
|
|---|
| 755 | open($fhout, '>:raw', $dst) or die("Failed to open file for writing: " . $dst);
|
|---|
| 756 | my $fhin = $thrift_client->open($src_path);
|
|---|
| 757 | while ($encoded = $thrift_client->read($fhin, $offset, $buffer_length))
|
|---|
| 758 | {
|
|---|
| 759 | if ($debug_encoding)
|
|---|
| 760 | {
|
|---|
| 761 | print STDERR "Reading Data: \n=== START ===\n"; Dump($encoded); print STDERR "\n=== END ===\n\n";
|
|---|
| 762 | }
|
|---|
| 763 | my $decoded = MIME::Base91::decode($encoded);
|
|---|
| 764 | if ($debug_encoding)
|
|---|
| 765 | {
|
|---|
| 766 | print STDERR "Decoded: \n=== START ===\n"; Dump($decoded); print STDERR "\n=== END ===\n\n";
|
|---|
| 767 | }
|
|---|
| 768 | print $fhout $decoded;
|
|---|
| 769 | if (length ($decoded) < $buffer_length)
|
|---|
| 770 | {
|
|---|
| 771 | last;
|
|---|
| 772 | }
|
|---|
| 773 | else
|
|---|
| 774 | {
|
|---|
| 775 | $offset += $buffer_length;
|
|---|
| 776 | }
|
|---|
| 777 | }
|
|---|
| 778 | close($fhout);
|
|---|
| 779 | $thrift_client->close($fhin);
|
|---|
| 780 | # in general, the transfer has worked if the destination file exists
|
|---|
| 781 | my $result = (-f $dst);
|
|---|
| 782 | # if moving, remove the source file from the HDFS filesystem
|
|---|
| 783 | if ($mode eq 'MOVE')
|
|---|
| 784 | {
|
|---|
| 785 | $thrift_client->rm($src_path, 0);
|
|---|
| 786 | # update result to reflect if we successfully removed the src file
|
|---|
| 787 | $result = $result && !$thrift_client->exists($src_path);
|
|---|
| 788 | }
|
|---|
| 789 | return $result;
|
|---|
| 790 | }
|
|---|
| 791 | ## transferFileToLocal()
|
|---|
| 792 |
|
|---|
| 793 |
|
|---|
| 794 | 1;
|
|---|
