version 1.5, 2009/06/19 14:03:19
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version 1.6, 2009/06/23 03:01:15
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Line 33 use IO::Socket;
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Line 33 use IO::Socket;
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use Apache::lonnet; |
use Apache::lonnet; |
use Apache::response(); |
use Apache::response(); |
use LONCAPA; |
use LONCAPA; |
### Commented out for now: use Tie::IxHash::Easy; # autoties all subhashes to keep index order |
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### You need to install the libraries below for this to work! |
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###use Tie::IxHash::Easy; # autoties all subhashes to keep index order |
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###use Data::Dumper; # used to output hash contents |
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my $errormsg=''; |
my $errormsg=''; |
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Line 101 sub Rpeel {
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Line 105 sub Rpeel {
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# Rreturn accepts a string containing a serialized R object |
# Rreturn accepts a string containing a serialized R object |
# and returns either the object's value (if it is scalar) or a reference |
# and returns either the object's value (if it is scalar) or a reference |
# to a hash containing the contents of the object. Any null keys in the hash |
# to a hash containing the contents of the object. Any null keys in the hash |
# are replaced by 'capaNNN' where NNN is the index of the entry in the original |
# are replaced by 'resultNNN' where NNN is the index of the entry in the original |
# R array. |
# R array. |
# |
# |
sub Rreturn { |
sub Rreturn { |
my $x = $_[0]; # the string containing the serialized R object(s) |
my $x = $_[0]; # the string containing the serialized R object(s) |
$errormsg=''; |
$x=~s/^\"//; |
if ($x =~ /^(?:i|d):(.+?);$/) { |
$x=~s/\"$//; |
return $1; # return the value of the number |
$x=~s/\\\"/\"/g; |
} elsif ($x =~ /^s:(\d+):\"(.*)\";$/) { |
$errormsg=''; |
# string -- verify the length |
if ($x =~ /^(?:i|d):(.+?);$/) { |
if (length($2) eq $1) { |
return $1; # return the value of the number |
return $2; # return the string |
} elsif ($x =~ /^s:(\d+):\"(.*)\";$/) { |
} else { |
# string -- verify the length |
return 'mismatch in string length'; |
if (length($2) eq $1) { |
} |
return $2; # return the string |
} elsif ($x =~ /^a:(\d+):\{(.*)\}$/) { |
} else { |
# array |
return 'mismatch in string length'; |
my $dim = $1; # array size |
} |
$x = $2; # array contents |
} elsif ($x =~ /^a:(\d+):\{(.*)\}$/) { |
tie(my %h,'Tie::IxHash::Easy'); # start a hash |
# array |
keys(%h) = $dim; # allocate space for the hash |
my $dim = $1; # array size |
my $key; |
$x = $2; # array contents |
my $y; |
tie(my %h,'Tie::IxHash::Easy'); # start a hash |
for (my $i = 0; $i < $dim; $i++) { |
keys(%h) = $dim; # allocate space for the hash |
($y, $x) = &Rpeel($x); # strip off the entry for the key |
my $key; |
if ($y eq '') { |
my $y; |
&Rcroak('ran out of keys'); |
for (my $i = 0; $i < $dim; $i++) { |
} |
($y, $x) = &Rpeel($x); # strip off the entry for the key |
$key = &Rreturn($y); |
if ($y eq '') { |
if ($key eq '') { |
&Rcroak('ran out of keys'); |
$key = "capa$i"; # correct null key |
} |
} |
$key = &Rreturn($y); |
($y, $x) = &Rpeel($x); # strip off the value |
if ($key eq '') { |
if ($y eq '') { |
$key = "result$i"; # correct null key |
&Rcroak('ran out of values'); |
} |
} |
($y, $x) = &Rpeel($x); # strip off the value |
if ($y =~ /^a:/) { |
if ($y eq '') { |
$h{$key} = \&Rreturn($y); # array value: store as reference |
&Rcroak('ran out of values'); |
} else { |
} |
$h{$key} = &Rreturn($y); # scalar value: store the entry in the hash |
if ($y =~ /^a:/) { |
} |
$h{$key} = \&Rreturn($y); # array value: store as reference |
} |
} else { |
if ($errormsg) { return $errormsg; } |
$h{$key} = &Rreturn($y); # scalar value: store the entry in the hash |
return \%h; # return a reference to the hash |
} |
} |
} |
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if ($errormsg) { return $errormsg; } |
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return \%h; # return a reference to the hash |
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} else { |
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return 'Unrecognized output'; |
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} |
} |
} |
# --- end Rreturn --- |
# --- end Rreturn --- |
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# |
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# Rentry takes a list of indices and gets the entry in a hash generated by Rreturn. |
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# Call: Rentry(Rvalue, index1, index2, ...) where Rvalue is a hash returned by Rreturn. |
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# Rentry will return the first scalar value it encounters (ignoring excess indices). |
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# If an invalid key is given, Rentry returns undef. |
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# |
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sub Rentry { |
sub Rentry { |
my $hash = shift; # pointer to hash |
my $hash = shift; # pointer to tied hash |
my $x; |
my $i; |
my $i; |
if (ref($hash) ne 'HASH') { |
if (ref($hash) ne 'HASH') { |
return 'Argument to cas_hashref_entry is not a hash!'; |
&Rcroak('argument to Rentry is not a hash'); |
} |
} |
while ($i = shift) { |
while ($i = shift) { |
if (exists($hash->{$i})) { |
if (exists $hash->{$i}) { |
$hash = $hash->{$i}; |
$hash = $hash->{$i}; |
} else { |
} else { |
return undef; |
return undef; |
} |
} |
if (ref($hash) eq 'REF') { |
if (ref($hash) eq 'REF') { |
$hash = $$hash; # dereference one layer |
$hash = $$hash; # dereference one layer |
} elsif (ref($hash) ne 'HASH') { |
} elsif (ref($hash) ne 'HASH') { |
return $hash; # drilled down to a scalar |
return $hash; # drilled down to a scalar |
} |
} |
} |
} |
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} |
} |
# --- end Rentry --- |
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sub Rarray { |
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my $hash = shift; # pointer to tied hash |
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my $i; |
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if (ref($hash) ne 'HASH') { |
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return 'Argument to cas_hashref_array is not a hash!'; |
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} |
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while ($i = shift) { |
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if (exists($hash->{$i})) { |
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$hash = $hash->{$i}; |
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} else { |
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return undef; |
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} |
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if (ref($hash) eq 'REF') { |
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$hash = $$hash; # dereference one layer |
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} |
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} |
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my @returnarray=(); |
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foreach my $key (keys(%{$hash})) { |
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$returnarray[$key-1]=$$hash{$key}; |
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} |
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return @returnarray; |
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} |
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sub connect { |
sub connect { |
return IO::Socket::UNIX->new(Peer => $Apache::lonnet::perlvar{'lonSockDir'}.'/rsock', |
return IO::Socket::UNIX->new(Peer => $Apache::lonnet::perlvar{'lonSockDir'}.'/rsock', |
Line 260 sub runscript {
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Line 283 sub runscript {
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return $reply; |
return $reply; |
} |
} |
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sub runserializedscript { |
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my ($socket,$fullscript,$libraries)=@_; |
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if (&blacklisted($fullscript)) { return 'Error: blacklisted'; } |
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my $reply; |
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$fullscript=~s/[\n\r\l]//gs; |
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if ($libraries) { |
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foreach my $library (split(/\s*\,\s*/,$libraries)) { |
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unless ($library=~/\w/) { next; } |
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if (&r_is_allowed_library($library)) { |
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$reply=&rreply($socket,'library('.$library.');'."\n"); |
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if ($reply=~/^Error\:/) { return($reply,$reply); } |
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} else { |
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return 'Error: blacklisted'; |
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} |
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} |
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} |
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my @actuallines=(); |
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foreach my $line (split(/\;/s,$fullscript)) { |
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if ($line=~/\w/) { push (@actuallines,$line); } |
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} |
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for (my $i=0; $i<$#actuallines; $i++) { |
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$reply=&rreply($socket,$actuallines[$i].";\n"); |
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if ($reply=~/^Error\:/) { return($reply,$reply); } |
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} |
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# The last line needs to be serialized |
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$reply=&Rreturn(&rreply($socket,"phpSerialize($actuallines[-1]);\n")); |
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return($reply,&Dumper($reply)); |
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} |
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sub r_cas_formula_fix { |
sub r_cas_formula_fix { |
my ($expression)=@_; |
my ($expression)=@_; |
return &Apache::response::implicit_multiplication($expression); |
return &Apache::response::implicit_multiplication($expression); |
Line 288 sub r_run {
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Line 340 sub r_run {
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} |
} |
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sub r_eval { |
sub r_eval { |
my ($script,$libraries) = @_; |
my ($script,$libraries,$hashflag) = @_; |
my $socket=&connect(); |
my $socket=&connect(); |
my $reply=&runscript($socket,$script,$libraries); |
my $reply; |
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my $dump=''; |
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if ($hashflag) { |
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($reply,$dump)=&runserializedscript($socket,$script,$libraries); |
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} else { |
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$reply=&runscript($socket,$script,$libraries); |
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} |
&disconnect($socket); |
&disconnect($socket); |
return $reply; |
return ($reply,$dump); |
} |
} |
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