2015-08-05 14:43:41 +02:00
|
|
|
####################################################################################################################################
|
|
|
|
# PROTOCOL COMMON MODULE
|
|
|
|
####################################################################################################################################
|
|
|
|
package BackRest::Protocol::Common;
|
|
|
|
|
|
|
|
use strict;
|
|
|
|
use warnings FATAL => qw(all);
|
|
|
|
use Carp qw(confess);
|
|
|
|
|
|
|
|
use Compress::Raw::Zlib qw(WANT_GZIP Z_OK Z_BUF_ERROR Z_STREAM_END);
|
|
|
|
use File::Basename qw(dirname);
|
|
|
|
use IO::String qw();
|
|
|
|
|
|
|
|
use lib dirname($0) . '/../lib';
|
|
|
|
use BackRest::Config;
|
|
|
|
use BackRest::Exception;
|
|
|
|
use BackRest::Ini;
|
|
|
|
use BackRest::Protocol::IO;
|
|
|
|
use BackRest::Utility;
|
|
|
|
|
|
|
|
####################################################################################################################################
|
|
|
|
# Operation constants
|
|
|
|
####################################################################################################################################
|
|
|
|
use constant OP_PROTOCOL_COMMON => 'Protocol::Common';
|
|
|
|
|
|
|
|
use constant OP_PROTOCOL_COMMON_NEW => OP_PROTOCOL_COMMON . "->new";
|
|
|
|
|
|
|
|
####################################################################################################################################
|
|
|
|
# CONSTRUCTOR
|
|
|
|
####################################################################################################################################
|
|
|
|
sub new
|
|
|
|
{
|
|
|
|
my $class = shift; # Class name
|
|
|
|
my $iBlockSize = shift; # Buffer size
|
|
|
|
my $iCompressLevel = shift; # Set compression level
|
|
|
|
my $iCompressLevelNetwork = shift; # Set compression level for network only compression
|
|
|
|
my $strName = shift; # Name to be used for gretting
|
|
|
|
|
|
|
|
# Debug
|
|
|
|
logTrace(OP_PROTOCOL_COMMON_NEW, DEBUG_CALL, undef,
|
|
|
|
{iBlockSize => $iBlockSize, iCompressLevel => $iCompressLevel, iCompressNetworkLevel => $iCompressLevelNetwork});
|
|
|
|
|
|
|
|
# Create the class hash
|
|
|
|
my $self = {};
|
|
|
|
bless $self, $class;
|
|
|
|
|
|
|
|
# Set default block size
|
|
|
|
$self->{iBlockSize} = $iBlockSize;
|
|
|
|
|
|
|
|
if (!defined($self->{iBlockSize}))
|
|
|
|
{
|
|
|
|
confess &log(ASSERT, 'iBlockSize must be set');
|
|
|
|
}
|
|
|
|
|
|
|
|
# Set compress levels
|
|
|
|
$self->{iCompressLevel} = $iCompressLevel;
|
|
|
|
|
|
|
|
if (!defined($self->{iCompressLevel}))
|
|
|
|
{
|
|
|
|
confess &log(ASSERT, 'iCompressLevel must be set');
|
|
|
|
}
|
|
|
|
|
|
|
|
$self->{iCompressLevelNetwork} = $iCompressLevelNetwork;
|
|
|
|
|
|
|
|
if (!defined($self->{iCompressLevelNetwork}))
|
|
|
|
{
|
|
|
|
confess &log(ASSERT, 'iCompressLevelNetwork must be set');
|
|
|
|
}
|
|
|
|
|
|
|
|
# Create the greeting that will be used to check versions with the remote
|
|
|
|
if (defined($strName))
|
|
|
|
{
|
|
|
|
$self->{strName} = $strName;
|
|
|
|
$self->{strGreeting} = 'PG_BACKREST_' . uc($strName) . ' ' . BACKREST_VERSION;
|
|
|
|
}
|
|
|
|
|
|
|
|
return $self;
|
|
|
|
}
|
|
|
|
|
|
|
|
####################################################################################################################################
|
|
|
|
# pipeToString
|
|
|
|
#
|
|
|
|
# Copies data from a file handle into a string.
|
|
|
|
####################################################################################################################################
|
|
|
|
sub pipeToString
|
|
|
|
{
|
|
|
|
my $self = shift;
|
|
|
|
my $hOut = shift;
|
|
|
|
|
|
|
|
my $strBuffer;
|
|
|
|
my $hString = IO::String->new($strBuffer);
|
|
|
|
$self->binaryXfer($hOut, $hString);
|
|
|
|
|
|
|
|
return $strBuffer;
|
|
|
|
}
|
|
|
|
|
|
|
|
####################################################################################################################################
|
|
|
|
# blockRead
|
|
|
|
#
|
|
|
|
# Read a block from the protocol layer.
|
|
|
|
####################################################################################################################################
|
|
|
|
sub blockRead
|
|
|
|
{
|
|
|
|
my $self = shift;
|
|
|
|
my $io = shift;
|
|
|
|
my $strBlockRef = shift;
|
|
|
|
my $bProtocol = shift;
|
|
|
|
|
|
|
|
my $iBlockSize;
|
|
|
|
my $strMessage;
|
|
|
|
|
|
|
|
if ($bProtocol)
|
|
|
|
{
|
|
|
|
# Read the block header and make sure it's valid
|
|
|
|
my $strBlockHeader = $self->{io}->lineRead();
|
|
|
|
|
|
|
|
if ($strBlockHeader !~ /^block -{0,1}[0-9]+( .*){0,1}$/)
|
|
|
|
{
|
|
|
|
$self->{io}->waitPid();
|
|
|
|
confess "unable to read block header ${strBlockHeader}";
|
|
|
|
}
|
|
|
|
|
|
|
|
# Get block size from the header
|
|
|
|
my @stryToken = split(/ /, $strBlockHeader);
|
|
|
|
$iBlockSize = $stryToken[1];
|
|
|
|
$strMessage = $stryToken[2];
|
|
|
|
|
|
|
|
# If block size is 0 or an error code then undef the buffer
|
|
|
|
if ($iBlockSize <= 0)
|
|
|
|
{
|
|
|
|
undef($$strBlockRef);
|
|
|
|
}
|
|
|
|
# Else read the block
|
|
|
|
else
|
|
|
|
{
|
|
|
|
my $iBlockRead = 0;
|
|
|
|
my $iBlockIn = 0;
|
|
|
|
my $iOffset = defined($$strBlockRef) ? length($$strBlockRef) : 0;
|
|
|
|
|
|
|
|
# !!! Would be nice to modify this with a non-blocking read
|
|
|
|
# http://docstore.mik.ua/orelly/perl/cookbook/ch07_15.htm
|
|
|
|
|
|
|
|
# Read as many chunks as it takes to get the full block
|
|
|
|
while ($iBlockRead != $iBlockSize)
|
|
|
|
{
|
|
|
|
$iBlockIn = $io->bufferRead($strBlockRef, $iBlockSize - $iBlockRead, $iBlockRead + $iOffset);
|
|
|
|
$iBlockRead += $iBlockIn;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
$iBlockSize = $io->bufferRead($strBlockRef, $self->{iBlockSize}, defined($$strBlockRef) ? length($$strBlockRef) : undef);
|
|
|
|
}
|
|
|
|
|
|
|
|
# Return the block size
|
|
|
|
return $iBlockSize, $strMessage;
|
|
|
|
}
|
|
|
|
|
|
|
|
####################################################################################################################################
|
|
|
|
# blockWrite
|
|
|
|
#
|
|
|
|
# Write a block to the protocol layer.
|
|
|
|
####################################################################################################################################
|
|
|
|
sub blockWrite
|
|
|
|
{
|
|
|
|
my $self = shift;
|
|
|
|
my $io = shift;
|
|
|
|
my $tBlockRef = shift;
|
|
|
|
my $iBlockSize = shift;
|
|
|
|
my $bProtocol = shift;
|
|
|
|
my $strMessage = shift;
|
|
|
|
|
|
|
|
# If block size is not defined, get it from buffer length
|
|
|
|
$iBlockSize = defined($iBlockSize) ? $iBlockSize : length($$tBlockRef);
|
|
|
|
|
|
|
|
# Write block header to the protocol stream
|
|
|
|
if ($bProtocol)
|
|
|
|
{
|
|
|
|
$io->lineWrite("block ${iBlockSize}" . (defined($strMessage) ? " ${strMessage}" : ''));
|
|
|
|
}
|
|
|
|
|
|
|
|
# Write block if size > 0
|
|
|
|
if ($iBlockSize > 0)
|
|
|
|
{
|
|
|
|
$io->bufferWrite($tBlockRef, $iBlockSize);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
####################################################################################################################################
|
|
|
|
# binaryXfer
|
|
|
|
#
|
|
|
|
# Copies data from one file handle to another, optionally compressing or decompressing the data in stream. If $strRemote != none
|
|
|
|
# then one side is a protocol stream, though this can be controlled with the bProtocol param.
|
|
|
|
####################################################################################################################################
|
|
|
|
sub binaryXfer
|
|
|
|
{
|
|
|
|
my $self = shift;
|
|
|
|
my $hIn = shift;
|
|
|
|
my $hOut = shift;
|
|
|
|
my $strRemote = shift;
|
|
|
|
my $bSourceCompressed = shift;
|
|
|
|
my $bDestinationCompress = shift;
|
|
|
|
my $bProtocol = shift;
|
|
|
|
|
|
|
|
# The input stream must be defined
|
|
|
|
if (!defined($hIn))
|
|
|
|
{
|
|
|
|
if (defined($self->{io}))
|
|
|
|
{
|
|
|
|
$hIn = $self->{io}->hInGet();
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
confess &log(ASSERT, 'hIn is not defined');
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
# The output stream must be defined unless 'none' is passed
|
|
|
|
if (!defined($hOut))
|
|
|
|
{
|
|
|
|
if (defined($self->{io}))
|
|
|
|
{
|
|
|
|
$hOut = $self->{io}->hOutGet();
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
confess &log(ASSERT, 'hOut is not defined');
|
|
|
|
}
|
|
|
|
}
|
|
|
|
elsif ($hOut eq 'none')
|
|
|
|
{
|
|
|
|
undef($hOut);
|
|
|
|
}
|
|
|
|
|
|
|
|
# If no remote is defined then set to none
|
|
|
|
if (!defined($strRemote))
|
|
|
|
{
|
|
|
|
$strRemote = 'none';
|
|
|
|
}
|
|
|
|
# Only set compression defaults when remote is defined
|
|
|
|
else
|
|
|
|
{
|
|
|
|
$bSourceCompressed = defined($bSourceCompressed) ? $bSourceCompressed : false;
|
|
|
|
$bDestinationCompress = defined($bDestinationCompress) ? $bDestinationCompress : false;
|
|
|
|
}
|
|
|
|
|
|
|
|
# Default protocol to true
|
|
|
|
$bProtocol = defined($bProtocol) ? $bProtocol : true;
|
|
|
|
my $strMessage = undef;
|
|
|
|
|
|
|
|
# Create IO object for this transfer
|
|
|
|
my $io = new BackRest::Protocol::IO($hIn, $hOut, $self->{io}->{hErr}, $self->{io}->{pid});
|
|
|
|
|
|
|
|
# Checksum and size
|
|
|
|
my $strChecksum = undef;
|
|
|
|
my $iFileSize = undef;
|
|
|
|
|
|
|
|
# Read from the protocol stream
|
|
|
|
if ($strRemote eq 'in')
|
|
|
|
{
|
|
|
|
# If the destination should not be compressed then decompress
|
|
|
|
if (!$bDestinationCompress)
|
|
|
|
{
|
|
|
|
my $iBlockSize;
|
|
|
|
my $tCompressedBuffer;
|
|
|
|
my $tUncompressedBuffer;
|
|
|
|
my $iUncompressedBufferSize;
|
|
|
|
|
|
|
|
# Initialize SHA
|
|
|
|
my $oSHA;
|
|
|
|
|
|
|
|
if (!$bProtocol)
|
|
|
|
{
|
|
|
|
$oSHA = Digest::SHA->new('sha1');
|
|
|
|
}
|
|
|
|
|
|
|
|
# Initialize inflate object and check for errors
|
|
|
|
my ($oZLib, $iZLibStatus) =
|
|
|
|
new Compress::Raw::Zlib::Inflate(WindowBits => 15 & $bSourceCompressed ? WANT_GZIP : 0,
|
|
|
|
Bufsize => $self->{iBlockSize}, LimitOutput => 1);
|
|
|
|
|
|
|
|
if ($iZLibStatus != Z_OK)
|
|
|
|
{
|
|
|
|
confess &log(ERROR, "unable create a inflate object: ${iZLibStatus}");
|
|
|
|
}
|
|
|
|
|
|
|
|
# Read all input
|
|
|
|
do
|
|
|
|
{
|
|
|
|
# Read a block from the input stream
|
|
|
|
($iBlockSize, $strMessage) = $self->blockRead($io, \$tCompressedBuffer, $bProtocol);
|
|
|
|
|
|
|
|
# Process protocol messages
|
|
|
|
if (defined($strMessage) && $strMessage eq 'nochecksum')
|
|
|
|
{
|
|
|
|
$oSHA = Digest::SHA->new('sha1');
|
|
|
|
undef($strMessage);
|
|
|
|
}
|
|
|
|
|
|
|
|
# If the block contains data, decompress it
|
|
|
|
if ($iBlockSize > 0)
|
|
|
|
{
|
|
|
|
# Keep looping while there is more to decompress
|
|
|
|
do
|
|
|
|
{
|
|
|
|
# Decompress data
|
|
|
|
$iZLibStatus = $oZLib->inflate($tCompressedBuffer, $tUncompressedBuffer);
|
|
|
|
$iUncompressedBufferSize = length($tUncompressedBuffer);
|
|
|
|
|
|
|
|
# If status is ok, write the data
|
|
|
|
if ($iZLibStatus == Z_OK || $iZLibStatus == Z_BUF_ERROR || $iZLibStatus == Z_STREAM_END)
|
|
|
|
{
|
|
|
|
if ($iUncompressedBufferSize > 0)
|
|
|
|
{
|
|
|
|
# Add data to checksum
|
|
|
|
if (defined($oSHA))
|
|
|
|
{
|
|
|
|
$oSHA->add($tUncompressedBuffer);
|
|
|
|
}
|
|
|
|
|
|
|
|
# Write data if hOut is defined
|
|
|
|
if (defined($hOut))
|
|
|
|
{
|
|
|
|
$io->bufferWrite(\$tUncompressedBuffer, $iUncompressedBufferSize);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
# Else error, exit so it can be handled
|
|
|
|
else
|
|
|
|
{
|
|
|
|
$iBlockSize = 0;
|
|
|
|
last;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
while ($iZLibStatus != Z_STREAM_END && $iUncompressedBufferSize > 0 && $iBlockSize > 0);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
while ($iBlockSize > 0);
|
|
|
|
|
|
|
|
# Make sure the decompression succeeded (iBlockSize < 0 indicates remote error, handled later)
|
|
|
|
if ($iBlockSize == 0 && $iZLibStatus != Z_STREAM_END)
|
|
|
|
{
|
|
|
|
confess &log(ERROR, "unable to inflate stream: ${iZLibStatus}");
|
|
|
|
}
|
|
|
|
|
|
|
|
# Get checksum and total uncompressed bytes written
|
|
|
|
if (defined($oSHA))
|
|
|
|
{
|
|
|
|
$strChecksum = $oSHA->hexdigest();
|
|
|
|
$iFileSize = $oZLib->total_out();
|
|
|
|
};
|
|
|
|
}
|
|
|
|
# If the destination should be compressed then just write out the already compressed stream
|
|
|
|
else
|
|
|
|
{
|
|
|
|
my $iBlockSize;
|
|
|
|
my $tBuffer;
|
|
|
|
|
|
|
|
# Initialize checksum and size
|
|
|
|
my $oSHA;
|
|
|
|
|
|
|
|
if (!$bProtocol)
|
|
|
|
{
|
|
|
|
$oSHA = Digest::SHA->new('sha1');
|
|
|
|
$iFileSize = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
do
|
|
|
|
{
|
|
|
|
# Read a block from the protocol stream
|
|
|
|
($iBlockSize, $strMessage) = $self->blockRead($io, \$tBuffer, $bProtocol);
|
|
|
|
|
|
|
|
# If the block contains data, write it
|
|
|
|
if ($iBlockSize > 0)
|
|
|
|
{
|
|
|
|
# Add data to checksum and size
|
|
|
|
if (!$bProtocol)
|
|
|
|
{
|
|
|
|
$oSHA->add($tBuffer);
|
|
|
|
$iFileSize += $iBlockSize;
|
|
|
|
}
|
|
|
|
|
|
|
|
$io->bufferWrite(\$tBuffer, $iBlockSize);
|
|
|
|
undef($tBuffer);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
while ($iBlockSize > 0);
|
|
|
|
|
|
|
|
# Get checksum
|
|
|
|
if (!$bProtocol)
|
|
|
|
{
|
|
|
|
$strChecksum = $oSHA->hexdigest();
|
|
|
|
};
|
|
|
|
}
|
|
|
|
}
|
|
|
|
# Read from file input stream
|
|
|
|
else
|
|
|
|
{
|
|
|
|
# If source is not already compressed then compress it
|
|
|
|
if ($strRemote eq 'out' && !$bSourceCompressed)
|
|
|
|
{
|
|
|
|
my $iBlockSize;
|
|
|
|
my $tCompressedBuffer;
|
|
|
|
my $iCompressedBufferSize;
|
|
|
|
my $tUncompressedBuffer;
|
|
|
|
|
|
|
|
# Initialize message to indicate that a checksum will be sent
|
|
|
|
if ($bProtocol && defined($hOut))
|
|
|
|
{
|
|
|
|
$strMessage = 'checksum';
|
|
|
|
}
|
|
|
|
|
|
|
|
# Initialize checksum
|
|
|
|
my $oSHA = Digest::SHA->new('sha1');
|
|
|
|
|
|
|
|
# Initialize inflate object and check for errors
|
|
|
|
my ($oZLib, $iZLibStatus) =
|
|
|
|
new Compress::Raw::Zlib::Deflate(WindowBits => 15 & $bDestinationCompress ? WANT_GZIP : 0,
|
|
|
|
Level => $bDestinationCompress ? $self->{iCompressLevel} :
|
|
|
|
$self->{iCompressLevelNetwork},
|
|
|
|
Bufsize => $self->{iBlockSize}, AppendOutput => 1);
|
|
|
|
|
|
|
|
if ($iZLibStatus != Z_OK)
|
|
|
|
{
|
|
|
|
confess &log(ERROR, "unable create a deflate object: ${iZLibStatus}");
|
|
|
|
}
|
|
|
|
|
|
|
|
do
|
|
|
|
{
|
|
|
|
# Read a block from the stream
|
|
|
|
$iBlockSize = $io->bufferRead(\$tUncompressedBuffer, $self->{iBlockSize});
|
|
|
|
|
|
|
|
# If block size > 0 then compress
|
|
|
|
if ($iBlockSize > 0)
|
|
|
|
{
|
|
|
|
# Update checksum and filesize
|
|
|
|
$oSHA->add($tUncompressedBuffer);
|
|
|
|
|
|
|
|
# Compress the data
|
|
|
|
$iZLibStatus = $oZLib->deflate($tUncompressedBuffer, $tCompressedBuffer);
|
|
|
|
$iCompressedBufferSize = length($tCompressedBuffer);
|
|
|
|
|
|
|
|
# If compression was successful
|
|
|
|
if ($iZLibStatus == Z_OK)
|
|
|
|
{
|
|
|
|
# The compressed data is larger than block size, then write
|
|
|
|
if ($iCompressedBufferSize > $self->{iBlockSize})
|
|
|
|
{
|
|
|
|
$self->blockWrite($io, \$tCompressedBuffer, $iCompressedBufferSize, $bProtocol, $strMessage);
|
|
|
|
undef($tCompressedBuffer);
|
|
|
|
undef($strMessage);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
# Else if error
|
|
|
|
else
|
|
|
|
{
|
|
|
|
$iBlockSize = 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
while ($iBlockSize > 0);
|
|
|
|
|
|
|
|
# If good so far flush out the last bytes
|
|
|
|
if ($iZLibStatus == Z_OK)
|
|
|
|
{
|
|
|
|
$iZLibStatus = $oZLib->flush($tCompressedBuffer);
|
|
|
|
}
|
|
|
|
|
|
|
|
# Make sure the compression succeeded
|
|
|
|
if ($iZLibStatus != Z_OK)
|
|
|
|
{
|
|
|
|
confess &log(ERROR, "unable to deflate stream: ${iZLibStatus}");
|
|
|
|
}
|
|
|
|
|
|
|
|
# Get checksum and total uncompressed bytes written
|
|
|
|
$strChecksum = $oSHA->hexdigest();
|
|
|
|
$iFileSize = $oZLib->total_in();
|
|
|
|
|
|
|
|
# Write out the last block
|
|
|
|
if (defined($hOut))
|
|
|
|
{
|
|
|
|
$iCompressedBufferSize = length($tCompressedBuffer);
|
|
|
|
|
|
|
|
if ($iCompressedBufferSize > 0)
|
|
|
|
{
|
|
|
|
$self->blockWrite($io, \$tCompressedBuffer, $iCompressedBufferSize, $bProtocol, $strMessage);
|
|
|
|
undef($strMessage);
|
|
|
|
}
|
|
|
|
|
|
|
|
$self->blockWrite($io, undef, 0, $bProtocol, "${strChecksum}-${iFileSize}");
|
|
|
|
}
|
|
|
|
}
|
|
|
|
# If source is already compressed or transfer is not compressed then just read the stream
|
|
|
|
else
|
|
|
|
{
|
|
|
|
my $iBlockSize;
|
|
|
|
my $tBuffer;
|
|
|
|
my $tCompressedBuffer;
|
|
|
|
my $tUncompressedBuffer;
|
|
|
|
my $iUncompressedBufferSize;
|
|
|
|
my $oSHA;
|
|
|
|
my $oZLib;
|
|
|
|
my $iZLibStatus;
|
|
|
|
|
|
|
|
# If the destination will be compressed setup deflate
|
|
|
|
if ($bDestinationCompress)
|
|
|
|
{
|
|
|
|
if ($bProtocol)
|
|
|
|
{
|
|
|
|
$strMessage = 'checksum';
|
|
|
|
}
|
|
|
|
|
|
|
|
# Initialize checksum and size
|
|
|
|
$oSHA = Digest::SHA->new('sha1');
|
|
|
|
$iFileSize = 0;
|
|
|
|
|
|
|
|
# Initialize inflate object and check for errors
|
|
|
|
($oZLib, $iZLibStatus) =
|
|
|
|
new Compress::Raw::Zlib::Inflate(WindowBits => WANT_GZIP, Bufsize => $self->{iBlockSize}, LimitOutput => 1);
|
|
|
|
|
|
|
|
if ($iZLibStatus != Z_OK)
|
|
|
|
{
|
|
|
|
confess &log(ERROR, "unable create a inflate object: ${iZLibStatus}");
|
|
|
|
}
|
|
|
|
}
|
|
|
|
# Initialize message to indicate that a checksum will not be sent
|
|
|
|
elsif ($bProtocol)
|
|
|
|
{
|
|
|
|
$strMessage = 'nochecksum';
|
|
|
|
}
|
|
|
|
|
|
|
|
# Read input
|
|
|
|
do
|
|
|
|
{
|
|
|
|
$iBlockSize = $io->bufferRead(\$tBuffer, $self->{iBlockSize});
|
|
|
|
|
|
|
|
# Write a block if size > 0
|
|
|
|
if ($iBlockSize > 0)
|
|
|
|
{
|
|
|
|
$self->blockWrite($io, \$tBuffer, $iBlockSize, $bProtocol, $strMessage);
|
|
|
|
undef($strMessage);
|
|
|
|
}
|
|
|
|
|
|
|
|
# Decompress the buffer to calculate checksum/size
|
|
|
|
if ($bDestinationCompress)
|
|
|
|
{
|
|
|
|
# If the block contains data, decompress it
|
|
|
|
if ($iBlockSize > 0)
|
|
|
|
{
|
|
|
|
# Copy file buffer to compressed buffer
|
|
|
|
if (defined($tCompressedBuffer))
|
|
|
|
{
|
|
|
|
$tCompressedBuffer .= $tBuffer;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
$tCompressedBuffer = $tBuffer;
|
|
|
|
}
|
|
|
|
|
|
|
|
# Keep looping while there is more to decompress
|
|
|
|
do
|
|
|
|
{
|
|
|
|
# Decompress data
|
|
|
|
$iZLibStatus = $oZLib->inflate($tCompressedBuffer, $tUncompressedBuffer);
|
|
|
|
$iUncompressedBufferSize = length($tUncompressedBuffer);
|
|
|
|
|
|
|
|
# If status is ok, write the data
|
|
|
|
if ($iZLibStatus == Z_OK || $iZLibStatus == Z_BUF_ERROR || $iZLibStatus == Z_STREAM_END)
|
|
|
|
{
|
|
|
|
if ($iUncompressedBufferSize > 0)
|
|
|
|
{
|
|
|
|
$oSHA->add($tUncompressedBuffer);
|
|
|
|
$iFileSize += $iUncompressedBufferSize;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
# Else error, exit so it can be handled
|
|
|
|
else
|
|
|
|
{
|
|
|
|
$iBlockSize = 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
while ($iZLibStatus != Z_STREAM_END && $iUncompressedBufferSize > 0 && $iBlockSize > 0);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
while ($iBlockSize > 0);
|
|
|
|
|
|
|
|
# Check decompression get checksum
|
|
|
|
if ($bDestinationCompress)
|
|
|
|
{
|
|
|
|
# Make sure the decompression succeeded (iBlockSize < 0 indicates remote error, handled later)
|
|
|
|
if ($iBlockSize == 0 && $iZLibStatus != Z_STREAM_END)
|
|
|
|
{
|
|
|
|
confess &log(ERROR, "unable to inflate stream: ${iZLibStatus}");
|
|
|
|
}
|
|
|
|
|
|
|
|
# Get checksum
|
|
|
|
$strChecksum = $oSHA->hexdigest();
|
|
|
|
|
|
|
|
# Set protocol message
|
|
|
|
if ($bProtocol)
|
|
|
|
{
|
|
|
|
$strMessage = "${strChecksum}-${iFileSize}";
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
# If protocol write
|
|
|
|
if ($bProtocol)
|
|
|
|
{
|
|
|
|
# Write 0 block to indicate end of stream
|
|
|
|
$self->blockWrite($io, undef, 0, $bProtocol, $strMessage);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-08-08 23:11:20 +02:00
|
|
|
# If message is defined then the checksum and size should be in it
|
2015-08-05 14:43:41 +02:00
|
|
|
if (defined($strMessage))
|
|
|
|
{
|
|
|
|
my @stryToken = split(/-/, $strMessage);
|
|
|
|
$strChecksum = $stryToken[0];
|
|
|
|
$iFileSize = $stryToken[1];
|
|
|
|
}
|
|
|
|
|
|
|
|
# Return the checksum and size if they are available
|
|
|
|
return $strChecksum, $iFileSize;
|
|
|
|
}
|
|
|
|
|
|
|
|
1;
|