I would like to log SOAP::Lite transport request/response contents using a custom identifier (e.g. a transaction-id or txn_id in my example below):
#!/usr/bin/perl
use strict;
use warnings;
use Data::Dumper;
use SOAP::Lite +trace => [ transport => \&log_transport, ];
sub log_transport {
my ($in) = #_;
if (ref($in) eq "HTTP::Request") {
# INSERT INTO logs ( txn_id, request ) VALUES ( $tnx_id, $in->content )
say STDERR Dumper(ref($in), $in->content);
}
elsif (ref($in) eq "HTTP::Response") {
# UPDATE logs SET response = '$in->content' WHERE txn_id = $tnx_id
say STDERR Dumper(ref($in), $in->content);
}
}
$ENV{PERL_LWP_SSL_VERIFY_HOSTNAME}=0;
my $soap = SOAP::Lite->proxy('https://www.dataaccess.com/webservicesserver/NumberConversion.wso?op=NumberToWords');
$soap->serializer()->register_ns('http://www.dataaccess.com/webservicesserver/' ,"ns");
sub getWords
{
my ($number, $txn_id) = #_ ;
my $method = SOAP::Data->name("ns:NumberToWords");
my #params = ( SOAP::Data->name("ubiNum" => $number) );
my $response = $soap->call($method => #params);
if (!$response->fault) {
say STDOUT "NumberToWords = " . $response->result;
}
else {
say STDERR "error: " . (defined $response->faultstring? $response->faultstring : $soap->transport->status);
}
}
getWords(444, '123abc');
In my example above, how can I pass the transaction-id 123abc to my logger?
P.S. I do not wish to use:
$soap->outputxml(1)->call($method => #params)
It does not seem like the SOAP::Trace transport callback supports extra argument passing. As a workaround you could use a lexical variable declared in the outer scope like this:
use strict;
use warnings;
use Data::Dumper;
my $TXN_ID;
use SOAP::Lite +trace => [ transport => \&log_transport, ];
sub log_transport {
my ($in) = #_;
say STDERR "Logging transaction id: $TXN_ID:";
if (ref($in) eq "HTTP::Request") {
# INSERT INTO logs ( txn_id, request ) VALUES ( $tnx_id, $in->content )
say STDERR Dumper(ref($in), $in->content);
}
elsif (ref($in) eq "HTTP::Response") {
# UPDATE logs SET response = '$in->content' WHERE txn_id = $tnx_id
say STDERR Dumper(ref($in), $in->content);
}
}
$ENV{PERL_LWP_SSL_VERIFY_HOSTNAME}=0;
my $soap = SOAP::Lite->proxy('https://www.dataaccess.com/webservicesserver/NumberConversion.wso?op=NumberToWords');
$soap->serializer()->register_ns('http://www.dataaccess.com/webservicesserver/' ,"ns");
sub getWords
{
my ($number, $txn_id) = #_ ;
$TXN_ID = $txn_id;
my $method = SOAP::Data->name("ns:NumberToWords");
my #params = ( SOAP::Data->name("ubiNum" => $number) );
my $response = $soap->call($method => #params);
if (!$response->fault) {
say STDOUT "NumberToWords = " . $response->result;
}
else {
say STDERR "error: " . (defined $response->faultstring? $response->faultstring : $soap->transport->status);
}
}
getWords(444, '123abc');
Anybody help me make a virtual file system in Perl.
Very simple, 2 depth level, as
/subdir
subdir-l2
file2.txt
/file1.txt
I try use Fuse.pm, but not understand how create subdir level. I create %files hash, and if go to subdir, recreate it with new records. It's for test only.
#!/usr/bin/env perl
use strict;
use warnings;
use utf8;
use Fuse;
use POSIX qw(ENOENT EISDIR EINVAL);
my (%files) = (
'.' => {
type => 0040,
mode => 0755,
ctime => 1490603721
},
subdir => {
type => 0040,
mode => 0755,
ctime => 1490603721
},
"file1.txt" => {
type => 0100,
mode => 0755,
ctime => 1490603721
}
);
sub filename_fixup {
my ($file) = shift;
$file =~ s,^/,,;
$file = '.' unless length($file);
return $file;
}
sub getdir {
my $tmp = shift;
if ($tmp eq '/') {
return (keys %files),0;
} else {
(%files) = (
'.' => {
type => 0040,
mode => 0755,
ctime => 1490603721
},
# /subdir/subdir-l2
"subdir-l2" => {
type => 0040,
mode => 0755,
ctime => 1490603721
} ,
# /subdir/a-l2.file
"file2.txt" => {
cont => "File 'al2'.\n",
type => 0100,
mode => 0755,
ctime => 1490603721
}
);
return (keys %files),0;
}
}
sub getattr {
my ($file) = filename_fixup(shift);
$file =~ s,^/,,;
$file = '.' unless length($file);
return -ENOENT() unless exists($files{$file});
my ($size) = exists($files{$file}{cont}) ? length($files{$file}{cont}) : 0;
$size = $files{$file}{size} if exists $files{$file}{size};
my ($modes) = ($files{$file}{type}<<9) + $files{$file}{mode};
my ($dev, $ino, $rdev, $blocks, $gid, $uid, $nlink, $blksize) = (0,0,0,1,0,0,1,1024);
my ($atime, $ctime, $mtime);
$atime = $ctime = $mtime = $files{$file}{ctime};
return ($dev,$ino,$modes,$nlink,$uid,$gid,$rdev,$size,$atime,$mtime,$ctime,$blksize,$blocks);
}
Fuse::main(
mountpoint => "/tmp/123",
getdir => \&getdir,
getattr => \&getattr,
);
one level mount fine, but if go to deeper i get
?????????? ? ? ? ? ? file2.txt
?????????? ? ? ? ? ? subdir-l2
I'm really not a regular user of the Fuse module, neither of FUSE system. Tinkered with this issue out of pure curiosity. Thus, although I can't explain in very much details how to use the plain Fuse module to achieve your goal, I have a working code that does create the wanted filesystem (at least on my system, and seems that it is capable of creating any arbitrary filesystem tree), and I can explain how I got this code working.
So first of all I discovered the Fuse::Simple module on CPAN.
Its SYNOPSIS shows that it provides a really simple API to the Fuse module for creating arbitrary filesystems from a hash structure. Its source code isn't that huge, so I just created 'listing.pl' script file and copied there most of the functions (except fserr that caused a Modification of a read-only value exception), put the main sub contents out, so they will be the main script's flow, hardcoded the filesystem structure ($fs var), and made some little adjustments here and there (like declare vars with my to prevent exceptions), and finally got the filesystem mounted, with all directories listed and files readable. So this is the code I got at last:
#!/usr/bin/env perl
use strict;
use warnings;
use diagnostics;
use Carp;
use Fuse;
use Errno qw(:POSIX); # ENOENT EISDIR etc
use Fcntl qw(:DEFAULT :mode); # S_IFREG S_IFDIR, O_SYNC O_LARGEFILE etc.
use Switch;
my $debug = 0;
my %codecache = ();
my $ctime = time();
my $uid = $>;
my $gid = $) + 0;
my $fs = {
"file1.txt" => "File 1 contents",
"subdir" => {
"subdir-l2" => {},
"file2.txt" => "File 2 contents"
}
};
# some default args
my %args = (
"mountpoint" => "listing",
"debug" => $debug,
"fuse_debug" => 0,
"threaded" => 0,
"/" => $fs
);
# the default subs
my %fs_subs = (
"chmod" => \&fs_not_imp,
"chown" => \&fs_not_imp,
"flush" => \&fs_flush,
"fsync" => \&fs_not_imp,
"getattr" => \&fs_getattr,
"getdir" => \&fs_getdir,
"getxattr" => \&fs_not_imp,
"link" => \&fs_not_imp,
"listxattr" => \&fs_not_imp,
"mkdir" => \&fs_not_imp,
"mknod" => \&fs_not_imp,
"open" => \&fs_open,
"read" => \&fs_read,
"readlink" => \&fs_readlink,
"release" => \&fs_release,
"removexattr" => \&fs_not_imp,
"rmdir" => \&fs_not_imp,
"rename" => \&fs_not_imp,
"setxattr" => \&fs_not_imp,
"statfs" => \&fs_statfs,
"symlink" => \&fs_not_imp,
"truncate" => \&fs_truncate,
"unlink" => \&fs_not_imp,
"utime" => sub{return 0},
"write" => \&fs_write,
);
# except extract these ones back out.
$debug = delete $args{"debug"};
$args{"debug"} = delete( $args{"fuse_debug"} ) || 0;
delete $args{"/"};
# add the functions, if not already defined.
# wrap in debugger if debug is set.
for my $name (keys %fs_subs) {
my $sub = $fs_subs{$name};
# $sub = wrap($sub, $name) if $debug;
$args{$name} ||= $sub;
}
Fuse::main(%args);
sub fetch {
my ($path, #args) = #_;
my $obj = $fs;
for my $elem (split '/', $path) {
next if $elem eq ""; # skip empty // and before first /
$obj = runcode($obj); # if there's anything to run
# the dir we're changing into must be a hash (dir)
return ENOTDIR() unless ref($obj) eq "HASH";
# note that ENOENT and undef are NOT the same thing!
return ENOENT() unless exists $obj->{$elem};
$obj = $obj->{$elem};
}
return runcode($obj, #args);
}
sub runcode {
my ($obj, #args) = #_;
while (ref($obj) eq "CODE") {
my $old = $obj;
if (#args) { # run with these args. don't cache
delete $codecache{$old};
print "running $obj(",quoted(#args),") NO CACHE\n" if $debug;
$obj = saferun($obj, #args);
} elsif (exists $codecache{$obj}) { # found in cache
print "got cached $obj\n" if $debug;
$obj = $codecache{$obj}; # could be undef, or an error, BTW
} else {
print "running $obj() to cache\n" if $debug;
$obj = $codecache{$old} = saferun($obj);
}
if (ref($obj) eq "NOCACHE") {
print "returned a nocache() value - flushing\n" if $debug;
delete $codecache{$old};
$obj = $$obj;
}
print "returning ",ref($obj)," ",
defined($obj) ? $obj : "undef",
"\n" if $debug;
}
return $obj;
}
sub saferun {
my ($sub, #args) = #_;
my $ret = eval { &$sub(#args) };
my $died = $#;
if (ref($died)) {
print "+++ Error $$died\n" if ref($died) eq "ERROR";
return $died;
} elsif ($died) {
print "+++ $died\n";
# stale file handle? moreorless?
return ESTALE();
}
return $ret;
}
sub nocache {
return bless(\ shift, "NOCACHE"); # yup, utter abuse of bless :-)
}
sub dump_open_flags {
my $flags = shift;
printf " flags: 0%o = (", $flags;
for my $bits (
[ O_ACCMODE(), O_RDONLY(), "O_RDONLY" ],
[ O_ACCMODE(), O_WRONLY(), "O_WRONLY" ],
[ O_ACCMODE(), O_RDWR(), "O_RDWR" ],
[ O_APPEND(), O_APPEND(), "|O_APPEND" ],
[ O_NONBLOCK(), O_NONBLOCK(), "|O_NONBLOCK" ],
[ O_SYNC(), O_SYNC(), "|O_SYNC" ],
[ O_DIRECT(), O_DIRECT(), "|O_DIRECT" ],
[ O_LARGEFILE(), O_LARGEFILE(), "|O_LARGEFILE" ],
[ O_NOFOLLOW(), O_NOFOLLOW(), "|O_NOFOLLOW" ],
) {
my ($mask, $flag, $name) = #$bits;
if (($flags & $mask) == $flag) {
$flags -= $flag;
print $name;
}
}
printf "| 0%o !!!", $flags if $flags;
print ")\n";
}
sub accessor {
my $var_ref = shift;
croak "accessor() requires a reference to a scalar var\n"
unless defined($var_ref) && ref($var_ref) eq "SCALAR";
return sub {
my $new = shift;
$$var_ref = $new if defined($new);
return $$var_ref;
}
}
sub fs_not_imp { return -ENOSYS() }
sub fs_flush {
# we're passed a path, but finding my coderef stuff from a path
# is a bit of a 'mare. flush the lot, won't hurt TOO much.
print "Flushing\n" if $debug;
%codecache = ();
return 0;
}
sub easy_getattr {
my ($mode, $size) = #_;
return (
0, 0, # $dev, $ino,
$mode,
1, # $nlink, see fuse.sourceforge.net/wiki/index.php/FAQ
$uid, $gid, # $uid, $gid,
0, # $rdev,
$size, # $size,
$ctime, $ctime, $ctime, # actually $atime, $mtime, $ctime,
1024, 1, # $blksize, $blocks,
);
}
sub fs_getattr {
my $path = shift;
my $obj = fetch($path);
# undef doesn't actually mean "file not found", it could be a coderef
# file-sub which has returned undef.
return easy_getattr(S_IFREG | 0200, 0) unless defined($obj);
switch (ref($obj)) {
case "ERROR" { # this is an error to be returned.
return -$$obj;
}
case "" { # this isn't a ref, it's a real string "file"
return easy_getattr(S_IFREG | 0644, length($obj));
}
# case "CODE" should never happen - already been run by fetch()
case "HASH" { # this is a directory hash
return easy_getattr(S_IFDIR | 0755, 1);
}
case "SCALAR" { # this is a scalar ref. we use these for symlinks.
return easy_getattr(S_IFLNK | 0777, 1);
}
else { # what the hell is this file?!?
print "+++ What on earth is ",ref($obj)," $path ?\n";
return easy_getattr(S_IFREG | 0000, 0);
}
}
}
sub fs_getdir {
my $obj = fetch(shift);
return -$$obj if ref($obj) eq "ERROR"; # THINK this is a good idea.
return -ENOENT() unless ref($obj) eq "HASH";
return (".", "..", sort(keys %$obj), 0);
}
sub fs_open {
# doesn't really need to open, just needs to check.
my $obj = fetch(shift);
my $flags = shift;
dump_open_flags($flags) if $debug;
# if it's undefined, and we're not writing to it, return an error
return -EBADF() unless defined($obj) or ($flags & O_ACCMODE());
switch (ref($obj)) {
case "ERROR" { return -$$obj; }
case "" { return 0 } # this is a real string "file"
case "HASH" { return -EISDIR(); } # this is a directory hash
else { return -ENOSYS(); } # what the hell is this file?!?
}
}
sub fs_read {
my $obj = fetch(shift);
my $size = shift;
my $off = shift;
return -ENOENT() unless defined($obj);
return -$$obj if ref($obj) eq "ERROR";
# any other types of refs are probably bad
return -ENOENT() if ref($obj);
if ($off > length($obj)) {
return -EINVAL();
} elsif ($off == length($obj)) {
return 0; # EOF
}
return substr($obj, $off, $size);
}
sub fs_readlink {
my $obj = fetch(shift);
return -$$obj if ref($obj) eq "ERROR";
return -EINVAL() unless ref($obj) eq "SCALAR";
return $$obj;
}
sub fs_release {
my ($path, $flags) = #_;
dump_open_flags($flags) if $debug;
return 0;
}
sub fs_statfs {
return (
255, # $namelen,
1,1, # $files, $files_free,
1,1, # $blocks, $blocks_avail, # 0,0 seems to hide it from df?
2, # $blocksize,
);
}
sub fs_truncate {
my $obj = fetch(shift, ""); # run anything to set it to ""
return -$$obj if ref($obj) eq "ERROR";
return 0;
}
sub fs_write {
my ($path, $buf, $off) = #_;
my $obj = fetch($path, $buf, $off); # this runs the coderefs!
return -$$obj if ref($obj) eq "ERROR";
return length($buf);
}
Final word: I didn't try to use the module itself (it's not listed in my distro package repository, and I was too lazy (sorry) to install it by cpanm or other way). But I think that if I'll have to just use FUSE with Perl, I'll probably just use Fuse::Simple instead of Fuse, maybe forking it. I'd use plain Fuse only for my academic research, I think...
Hope this helps.
Is is possible to supply an accessor wrapper for a moose attribute without having to write it every time?
Example:
* There is an an attribute of type TkRef
* It should provide a wrapper for setting the value
* The name of the wrapper should be defined when defining the attribute
* I don't want to have to write the wrapper
I imagine it like this:
has _some_val => (
is => 'rw',
isa => 'TkRef',
coerce => 1,
init_arg => 'my_accessor_wrapper_name',
default => 'default value'
);
# Later in the class:
sub some_public_method {
my $self = shift;
# will set _some_val behind the scenes:
$self->my_accessor_wrapper_name('this will be the new value');
...
}
I'm assuming here that this follows on from your previous question so the aim is to wrap a ScalarRef attribute's accessors to ensure that when the setter is called with a new ScalarRef (or something that can be coerced into a ScalarRef), rather that the usual set action happening, you copy the string stored in the new scalar into the old scalar.
There are easier ways to do this than below (say, by writing a wrapper for has), but I think this is the "most antlered":
use 5.010;
use strict;
use warnings;
{
package MooseX::Traits::SetScalarByRef;
use Moose::Role;
use Moose::Util::TypeConstraints qw(find_type_constraint);
# Supply a default for "is"
around _process_is_option => sub
{
my $next = shift;
my $self = shift;
my ($name, $options) = #_;
if (not exists $options->{is})
{
$options->{is} = "rw";
}
$self->$next(#_);
};
# Supply a default for "isa"
my $default_type;
around _process_isa_option => sub
{
my $next = shift;
my $self = shift;
my ($name, $options) = #_;
if (not exists $options->{isa})
{
if (not defined $default_type)
{
$default_type = find_type_constraint('ScalarRef')
->create_child_constraint;
$default_type
->coercion('Moose::Meta::TypeCoercion'->new)
->add_type_coercions('Value', sub { my $r = $_; \$r });
}
$options->{isa} = $default_type;
}
$self->$next(#_);
};
# Automatically coerce
around _process_coerce_option => sub
{
my $next = shift;
my $self = shift;
my ($name, $options) = #_;
if (defined $options->{type_constraint}
and $options->{type_constraint}->has_coercion
and not exists $options->{coerce})
{
$options->{coerce} = 1;
}
$self->$next(#_);
};
# This allows handles => 1
around _canonicalize_handles => sub
{
my $next = shift;
my $self = shift;
my $handles = $self->handles;
if (!ref($handles) and $handles eq '1')
{
return ($self->init_arg, 'set_by_ref');
}
$self->$next(#_);
};
# Actually install the wrapper
around install_delegation => sub
{
my $next = shift;
my $self = shift;
my %handles = $self->_canonicalize_handles;
for my $key (sort keys %handles)
{
$handles{$key} eq 'set_by_ref' or next;
delete $handles{$key};
$self->associated_class->add_method($key, $self->_make_set_by_ref($key));
}
# When we call $next, we're going to temporarily
# replace $self->handles, so that $next cannot see
# the set_by_ref bits which were there.
my $orig = $self->handles;
$self->_set_handles(\%handles);
$self->$next(#_);
$self->_set_handles($orig); # and restore!
};
# This generates the coderef for the method that we're
# going to install
sub _make_set_by_ref
{
my $self = shift;
my ($method_name) = #_;
my $reader = $self->get_read_method;
my $type = $self->type_constraint;
my $coerce = $self->should_coerce;
return sub {
my $obj = shift;
if (#_)
{
my $new_ref = $coerce
? $type->assert_coerce(#_)
: do { $type->assert_valid(#_); $_[0] };
${$obj->$reader} = $$new_ref;
}
$obj->$reader;
};
}
}
{
package Local::Example;
use Moose;
use Moose::Util::TypeConstraints;
subtype 'TkRef', as 'ScalarRef';
coerce 'TkRef', from 'Str', via { my $r = $_; return \$r };
has _some_val => (
traits => [ 'MooseX::Traits::SetScalarByRef' ],
isa => 'TkRef',
init_arg => 'some_val',
default => 'default value',
handles => 1,
);
}
use Scalar::Util qw(refaddr);
my $eg = Local::Example->new;
say refaddr($eg->some_val);
$eg->some_val("new string");
say refaddr($eg->some_val), " - should not have changed";
say ${ $eg->some_val };
I want to export a function which depends on name of class where is exported into. I thought that it should be easy with Sub::Exporter but unfortunately the into key is not passed to generators. I have ended up with those ugly example code:
use strict;
use warnings;
package MyLog;
use Log::Log4perl qw(:easy get_logger);
use Sub::Exporter -setup => {
exports => [
log => \&gen_log,
audit_log => \&gen_log,
],
groups => [ default => [qw(log audit_log)] ],
collectors => ['category'],
installer => \&installer, # tunnel `into` value into generators
};
if ( not Log::Log4perl->initialized() ) {
#easy init if not initialised
Log::Log4perl->easy_init($ERROR);
}
sub gen_log {
my ( $class, $name, $arg, $global ) = #_;
my $category = $arg->{category};
$category = $global->{category}{$name} unless defined $category;
return sub { # return generator
my $into = shift; # class name passed by `installer`
$category = $name eq 'audit_log' ? "audit_log.$into" : $into
if !defined $category; # set default category
# lazy logger
my $logger;
return sub {
$logger or $logger = get_logger($category);
};
};
}
sub installer {
my ( $args, $todo ) = #_;
# each even value is still generator thus generate final function
my $i;
1 & $i++ and $_ = $_->( $args->{into} ) for #$todo;
Sub::Exporter::default_installer(#_);
}
1;
Is there better way how to do it without sacrifice all this rich Sub::Exporter abilities?
For example I would like to use one of those:
use MyLog category => { log => 'foo', audit_log => 'bar' };
use MyLog -default => { -prefix => 'my_' };
use MyLog
audit_log => { -as => 'audit' },
log => { -as => 'my_log', category => 'my.log' };
Edit: Added Sub::Exporter abilities requirement to question.
Edit2: Added usage examples.
You aren't clear how you want to determine the name. If I understand you correctly, this does what you want.
my %sub_for = (
foo => \&foo,
#...
);
sub install_as {
my ($package, $exported_name, $sub) = #_;
no strict 'refs';
*{"$package\::$exported_name"} = $sub;
return;
}
sub get_name_for {
my ($package, $name) = #_;
#... your code here
}
sub import {
my $class = shift;
my $package = caller;
for my $internal_name (#_) {
install_as($package, get_name_for($package, $internal_name), $get_sub_for{$name});
}
return;
}