[ViewVC] Annotation of: cvs/Net-FCP/bin/fmd

#!/opt/bin/perl

system "echo $$ >fmd.pid";
use Coro::Debug; our $server = new_unix_server Coro::Debug "debug";

=head1 fmd - the freenet mass downloader

Fmd is at a very early stage of development (and very hackish, too), as I
am learning the basics of freenet myself.

However, I use it in production, and since it verifies everything it
decodes etc., it seems to be quite safe to use, that is, if you know how
to debug perl :)

=head2 FEATURES

 - decoding is done "in place", i.e. all non-checkblock blocks are
   stored in-place and will not be moved, only checkblocks will
   be moved to their final position in the file before decoding.
 - high resistance against failures of fred or fmd
 - extremely persistent retry behaviour - there is no such thing
   as a permanent failure.
 - handles hundreds of simultaneous downloads with grace.

=head2 ENVIRONMENT

Set FMD_HOME to a directory (default ~/fmd) where fmd will store it's
files. It will not store your porn files or other freenet data outside
that directory.

The subdirectory db will contain a database (soon to go away), while tmp
contains queue files and partial splitfiles. All finished files will be
moved to the done subdir.

FREDHOST and FREDPORT do the obvious. Fix these docs if you disagree.

Also edit the fmd executable for the number of threads and other
non-useful constants. The default number (250) works for me, probably not
for you.

=head2 COMMANDS

=over 4

=item CHK@... (space or "/") filename

Just pasting a CHK and a filename sperated by one or more spaces or
slashes will add files to the queue. The line can have leading garbage,
i.e. you can paste full uris.

=item <attachment>...</attachment>

=item <attach>...</attach>

=item <attached>...</attached>

Will add frosts mentally deranged pseudo-xml format, soon to be replaced
by something even more horrible.

=item l

List all jobs by number.

=item <number> (optionally trailing command)

Selects the job with the given number for further comamnds that require a current job.

=item s

Show the current job. Bot useful right now.

=item k

Kill the current job. This will keep the temp. file around. Sorry. (But it
could be used to reconstruct the download.. hmm..)

=item pri<number>

Set the current job priority to <pri>. The default is 1. A job with higher
priority will (on average) get more requests.

The useful range is probably 0..100, but be careful and limit yourself to
small values (<10), otherwise your other downloads might starve!

=item q

Kill the command prompt. Yupp.

=back

=cut

use strict;

use EV;
use Coro::EV;

use Net::FCP;
use Storable ();
use Time::HiRes;
use Coro 4.23;
use Coro::Channel;
use Coro::Handle;
use Coro::Signal;
use Coro::Timer;
use Coro::AIO;
use Coro::Storable ();
use List::Util;
use Digest::SHA1;
use Algorithm::FEC;
use Digest::SHA1;
use Net::FCP::Util;
use POSIX ();

Coro::AIO::max_poll_time 0.01;
Coro::AIO::min_parallel 1;
Coro::AIO::max_parallel 32;

$|=1;

our $MAX_TXN = 400; # use max. this many transactions in parallel
our @HTL = (3,5,10,15,20);
our $VERIFY_CHK = 1; # verify all blocks, again and again (only useful to debugging).
our $FMD_HOME = $ENV{FMD_HOME} || "$ENV{HOME}/fmd";

our $FCP = new Net::FCP;

defined $FMD_HOME
   or die "you currently must define FMD_HOME to a persistent directory";

mkdir $FMD_HOME, 0700;

our $QUEUE_HOME = "$FMD_HOME/job";
mkdir $QUEUE_HOME, 0700;
our $DATA_HOME = "$FMD_HOME/tmp";
mkdir $DATA_HOME, 0700;
our $DONE_HOME = "$FMD_HOME/done";
mkdir $DONE_HOME, 0700;

our %job;

sub push_key {
   my ($key, $title) = @_;

   for my $job (values %job) {
      if ($job->{p}{key} eq $key) {
         warn "job $job->{id} already works on this, not adding";
         return;
      }
   }

   my $job = job->new_from_key ($key, $title);
   warn "added as job $job->{id}\n";
   $job;
}

sub cmdline {
   my ($i, $o) = @_;

   my $cmd = async {
      my $job;
      while (print $o "> " and defined ($_ = <$i>)) {
         chomp;
         if (/<attach(?:ment|ed|)>(.*) \* (CHK[^<]+)<\/attach/) {
            $job = push_key $2, $1;
         } elsif (/(CHK\@[a-zA-Z0-9,~\-]{54})[\/ ]+(.*?)\s*$/) {
            $job = push_key $1, $2;
         } elsif (s/^(\d+)//) {
            if ($job = $job{$1}) {
               print $o delete $job->{log};
               if ($job->{input}) {
               }
            }
            redo;
         } elsif (/^q/) {
            close $i;
            close $o;
         } elsif (/^l/) {
            for my $job (sort { $a->{id} <=> $b->{id} } values %job) {
               print $o "$_ $job->{id}: $job->{p}{key} $job->{p}{title} $job->{status}\n";
            }
#         } elsif (/^pri\s*(\d+)/) {
#            if ($job) {
#               $job->{p}{pri} = $1;
#               $job->save;
#            }
         } elsif (/^s$/) {
            print $o $job->show if $job;
         } elsif (/^k$/) {
            $job->kill if $job;
         } elsif (/^p(.*)/) {
            print $o +(join " ", eval $1), "\n";
         } elsif (/\S/) {
            #
         } else {
            print $o "?\n";
         }
         for my $job (sort { $a->{id} <=> $b->{id} } values %job) {
            if ($job->{_input}) {
                print $o "> $job->{id} $job->{title} $job->{status}\n";
            }
         }
      }
   };
}

package job;

use strict;

use Coro;
use Coro::AIO;
use Fcntl;
use IO::Handle;
use Array::Heap2;

our $count = 0;

sub new {
   my $class = shift;

   my $self = bless { @_ }, $class;

   for my $job (values %job) {
      if ($job->{p}{key} eq $self->{p}{key}) {
         warn "job $job->{id} already works on this, not adding";
         aio_unlink $self->{job};
         return;
      }
   }

   $self->{p}{title} !~ /\//
      or die "$self->{p}{title}: malformed key\n";

   $self->{p}{title} =~ s/\s+$//;
   $self->{p}{title} =~ s/\n/_/g;

   $self->{id} = ++$count;
   $self->{job} ||= "$QUEUE_HOME/" . Time::HiRes::time . ":$count.j";

   $job{$self->{id}} = $self;

   $self->start;
   $self
}

sub new_from_key {
   my ($class, $key, $title) = @_;
   $class->new (p => { key => $key, title => $title, state => "examine" });
}

sub new_from_file {
   my ($class, $path) = @_;
   $class->new (job => $path, p => Storable::retrieve $path);
}

sub save {
   my ($self) = @_;
   if (my $fh = aio_open "$self->{job}~", O_CREAT|O_TRUNC|O_WRONLY, 0600) {
      aio_write $fh, 0, undef, Coro::Storable::blocking_nfreeze $self->{p}, 0;
      aio_fsync $fh;
      aio_close $fh;
      aio_rename "$self->{job}~", $self->{job};
      aio_pathsync $QUEUE_HOME;
   }
}

sub clean {
   my ($self) = @_;

   delete $job{$self->{id}};
   $self->save;
   system "mv", $self->{job}, "$DONE_HOME/$self->{p}{title}.job";
   unlink $self->{job};
}

sub kill {
   my ($self) = @_;

   $self->clean;
   $self->{coro}->cancel;
}

our @queue;
our $queue_change = new Coro::Signal;
our $queue_alloc = 0;

async {
   for (;;) {
      while (@queue
             and (($queue[0][0] > 10 and $queue_alloc < $MAX_TXN)
               or ($queue[0][0] >  1 and $queue_alloc < $MAX_TXN - 3)
               or $queue_alloc < $MAX_TXN - 5)) {
         (pop_heap @queue)->[1]->send;
         $queue_alloc++;
         Coro::Timer::sleep 0.05;
      }
      $queue_change->wait;
   }
};

sub txn_begin {
   my ($pri) = @_;
   my $sig = new Coro::Signal;

   #warn "txn_begin $pri\n";#d#
   push_heap @queue, [$pri, $sig];
   $queue_change->send;
   $sig->wait;
}

sub txn_end {
   $queue_alloc--;
   $queue_change->send;
}

sub txn_client_get {
   my %arg = @_;

   txn_begin $arg{pri};
   $FCP->txn_client_get ($arg{uri}, $arg{htl})->cb (unblock_sub {
      txn_end;

      $arg{cb}->(@_);
   });
}

sub fetch_uri {
   my ($pri, $uri) = @_;

   for(my $count = 1; ; $count += 0.3) {
      for my $htl (@HTL) {
         txn_begin time + $htl + $count;
         my ($meta, $data) = eval { @{ $FCP->client_get ($uri, $htl) } };
         txn_end;
         if ($@) {
            if (UNIVERSAL::isa ($@, Net::FCP::Exception::)) {
               if ($@->type ("data_not_found")
                   || $@->type ("route_not_found")) {
                  next;
               }
               if ($@->type ("short_data")) {
                  warn "(short_data, redo)\n";
                  redo;
               }
               die;
            }
         }
         if (defined $data) {
            return ($meta, $data);
         }
      }
   }

   die;
}

sub log {
   my ($self, $text) = @_;
   my $time = POSIX::strftime "%H:%M:%S", localtime time;
   warn "$time $self->{id},$self->{p}{pri}: $text\n";
   $self->{log} .= "$time $text\n";
}

sub feedback {
   my ($self, $prompt) = @_;
   $self->{input} = [$Coro::current, $prompt];
   Coro::schedule;
}

sub show {
   my ($self) = @_;

   "ID: $self->{id}\n"
      . "Title: $self->{p}{title}\n"
      . "Blocks#: " . @{$self->{p}{blk} || []} . "\n"
      . "Blocks: " . (join "", map {
         $_->{done} ? "+" : "-"
      } @{$self->{p}{blk} || []}) . "\n" .
   ""
}

our $id;

sub MAXSEG (){ 128*1024*1024 }
sub MINSEG (){   6* 128*1024 }

sub blocksize($) {
   return
        $_[0] >= 64*1024*1024 ? 1024*1024
      : $_[0] >= 32*1024*1024 ?  512*1024
      : $_[0] >=    1024*1024 ?  256*1024
                              :  128*1024;
}

sub start {
   my ($self) = @_;

   $self->{p}{pri} ||= 1;
   $self->{p}{state} ||= "examine";

   $self->{job} =~ /\/([^\/]*)\.j$/ or die "$self->{job}: missing .j";
   $self->{file} = "$DATA_HOME/$1.d";
   sysopen $self->{fh}, $self->{file}, O_RDWR|O_CREAT, 0600
   # $self->{fh} = aio_open $self->{file}, O_RDWR|O_CREAT, 0600 
      or die "$self->{file}: $!";

   $self->{status} = "starting";
   $self->{coro} = async {
      $self->save;

      for(;;) {
         my ($state, @args) = ref $self->{p}{state} ? @{$self->{p}{state}} : $self->{p}{state};
         my $next = eval { $self->can ("state_$state")->($self, @args) };
         if ($@) {
            $self->log ($@);
            $next = $self->feedback ("continue with state: ");
         }
         $self->log ($self->{status} = "STATE CHANGE: ". join ", ", ref $next ? @$next : $next);
         $self->{p}{state} = $next;
         $self->save;
      }
   };
}

sub state_finish {
   my ($self, $save) = @_;

   if ($save) {
      aio_fsync $self->{fh};
      close $self->{fh};

      aio_unlink "$DONE_HOME/$self->{p}{title}";
      aio_link $self->{file}, "$DONE_HOME/$self->{p}{title}"
         and die "link: $self->{file} => $DONE_HOME/$self->{p}{title}: $!";
      aio_pathsync $DONE_HOME;
   }
   $self->clean;

   aio_unlink $self->{file};

   $self->{status} = "finished";
   $self->feedback ("finished");
   terminate;
}

sub state_examine {
   my ($self) = @_;
   my $p = $self->{p};

   $self->{status} = "initial fetch";

   for (;;) {
      $self->log ("fetching $p->{key} (=$p->{title})");

      ($p->{meta}, $p->{data}) = fetch_uri 100, "freenet:$p->{key}";
      $self->save;
      #use PApp::Util; print STDERR PApp::Util::dumpval [keys %{$meta->{document}[0]{split_file}}];
      $self->log ("type $p->{meta}{document}[0]{info}{format}");

      if (my $splitfile = $p->{meta}{document}[0]{split_file}) {
         return "splitfile";
      } elsif ((defined $p->{data}) and (length $p->{data})) {
         syswrite $self->{fh}, delete $p->{data};
         aio_fsync $self->{fh};
         return ["finish", 1];
      }

      $self->log ("EMPTY, retrying in an hour");
      Coro::Timer::sleep 3600;
   }

}

sub state_splitfile {
   my ($self) = @_;
   my $p = $self->{p};

   my $splitfile = $p->{meta}{document}[0]{split_file};
   my $filesize = hex $splitfile->{size};

   if ($splitfile->{algo_name} eq "OnionFEC_a_1_2") {
      my $data_packets = hex $splitfile->{block_count};
      my $check_packets = hex $splitfile->{check_block_count};

      my $blk = ($p->{blk} ||= []);

      unless (@$blk) {
         for (1..$data_packets) {
            push @$blk, {
               uri => $splitfile->{block}{sprintf "%x", $_},
            };
         }
         for (1..$check_packets) {
            push @$blk, {
               uri => $splitfile->{check_block}{sprintf "%x", $_},
            };
         }
      }

      my @segments;
      my $segments = 0;

      {
         # that is a horrible algorithm :(, these freenet freaks are... java-disabled
         # hardcoding lots of magic parameters is soo dumb.
         my $size = $filesize;
         my $offset = 0;
         my $offset2 = ($filesize & ~(1024*1024-1)) + 1024*1024; # leave enough space after last data block
         my $idx  = 0;
         my $idx2 = $data_packets;
         my @redundandy = (0,1,2); # maybe OnionFAC_a_1_2 means 1/2 redundancy(?)

         while ($size > 0) {
            my $segsize = $size >= MAXSEG ? MAXSEG : $size <= MINSEG ? MINSEG : $size;
            my $blksize = blocksize $segsize;
            my $seg    = 
               {
                  id      => $segments++,
                  todo    => int (($segsize + $blksize - 1) / $blksize),
                  done    => 0,
                  blk     => [],
                  blksize => $blksize,
               };

            push @segments, $seg;
            $size -= $segsize;

            while ($segsize > 0) {
               push @{$seg->{blk}}, $idx;
               for ($blk->[$idx++]) {
                  $_->{offset} = $offset;
                  #$_->{size}   = $blksize > $segsize ? $segsize : $blksize; # WRONG
                  $_->{size}   = $blksize;
                  $_->{seg}    = $seg;
               }

               $segsize -= $blksize;
               $offset  += $blksize;

               if (($redundandy[0] += $redundandy[1]) >= $redundandy[2]) {
                  $redundandy[0] -= $redundandy[2];

                  push @{$seg->{blk}}, $idx2;
                  for ($blk->[$idx2++]) {
                     $_->{offset} = $offset2;
                     $_->{size}   = $blksize;
                     $_->{seg}    = $seg;
                  }

                  $offset2 += $blksize;
               }
            }
         }

         $idx == $data_packets
            or die "$self->{id}/$p->{tile} $self->{job}\nidx $idx != data_packets $data_packets";
         $idx2 == $data_packets + $check_packets
            or die "$self->{id}/$p->{tile} $self->{job}\nidx2 $idx2 != data_packets $data_packets + check_packets $check_packets";
      }

      for (@$blk) {
         ++$_->{seg}{done} if $_->{done};
         delete $_->{htl};
      }

      my $fail = 0;
      my $sig = new Coro::Signal;

      $self->{status} = "splitfile fetch (" .  @$blk . " blocks)";

      my @txn;

      for (;;) {
         for my $id (0 .. $#$blk) {
            my $blk = $blk->[$id];

            next if $txn[$id] || $blk->{done} || $blk->{seg}{todo} <= $blk->{seg}{done};

            my $htl = $HTL[$blk->{htl}++ % @HTL];
            my $pri = int time + $htl / 20 * 7200 * rand;

            #warn $self->{id} . ", GET<$htl, $pri>\n";#d#
            $txn[$id] ||= txn_client_get pri => $pri, uri => $blk->{uri}, htl => $htl, cb => sub {
               undef $txn[$id];

               my $seg = $blk->{seg};

               my ($meta, $data) = eval { @{ $_[0]->result } };

               if (defined $data) {
                  $blk->{size} == length $data
                     or die sprintf "block $id expected size %d, got %d\n", $blk->{size}, length $data;

                  (length $data) == (aio_write $self->{fh}, $blk->{offset}, (length $data), $data, 0)
                     or die "unable to write chunk to disk, not setting valid flag";
                  aio_fsync $self->{fh};

                  $blk->{done} = 1;
                  $blk->{meta} = $meta->{raw} if length $meta->{raw};#d#
                  $seg->{done}++;
                  $self->save;

                  $::htl_sum += $htl;
                  $::htl_cnt++;

                  $self->log (sprintf "got block $seg->{id}.$id %d ($seg->{done}/$seg->{todo}) at htl $htl (%f) and pri $pri",
                                       length $data, $::htl_sum / $::htl_cnt);
               } else {
                  if ($@) {
                     if ($@->type ("data_not_found")) {
                        # nop
                     } elsif ($@->type ("network_error")) {
                        $self->log ("$@, retrying in 1s");
                        CORE::sleep 1;
                     } else {
                        $self->log ("$@");
                     }
                  }
                  ++$fail;
               }
               $self->{status} = "splitfile fetch ($seg->{done}/$seg->{todo}, $fail failed)";

               $sig->send;
            };
         }

         for my $seg (@segments) {
            if ($seg->{done} >= $seg->{todo} && !$seg->{finished}) {

               $self->log ("segment done, cancelling segment $seg->{id}");
               for my $id (@{$seg->{blk}}) {
                  (delete $txn[$id])->cancel if $txn[$id];
               }

               my $verify;
               for my $id (@{$seg->{blk}}) {
                  my $blk = $blk->[$id];
                  if ($blk->{done}) {
                     aio_read $self->{fh}, $blk->{offset}, $blk->{size}, my $buf, 0;

                     my $k1 = Net::FCP::Util::extract_chk_hash $blk->{uri};
                     my $k2 = Net::FCP::Util::generate_chk_hash $blk->{meta}, $buf;

                     if ($k1 ne $k2) {
                        $verify .= "v";
                        #warn sprintf "$p->{title} block $id BROKEN (%s != %s)", (unpack "H*", $k1), (unpack "H*", $k2);
                        $blk->{done} = 0;
                        $seg->{done}--;
                        $self->save;
                     } else {
                        $verify .= "V";
                     }
                  }
               }
               $self->log ("verified segment $seg->{id}");
               $self->log ($verify);

               if ($seg->{done} >= $seg->{todo} && !$seg->{finished}) {
                  $self->log ("verified segment OK $seg->{id}");
                  $seg->{finished}++;
                  $segments--;
               } else {
                  $self->log ("verified segment NOT OK $seg->{id}");
               }
            }
         }

         last unless $segments;

         $sig->wait;
      }

      $self->log ("decoding < $self->{job} $self->{file} $filesize >");

      for my $seg (@segments) {
         my @part;
         my @idx;
         my @blk = map $blk->[$_], sort { $a <=> $b } @{$seg->{blk}};

         for my $id (0 .. $#blk) {
            my $blk = $blk[$id];
            next unless $blk->{done};

            push @part, [$self->{fh}, $blk->{offset}];
            push @idx, $id;

            last if @idx == $seg->{todo};
         }

         my $fec = new Algorithm::FEC
                          $seg->{todo},
                          scalar @blk,
                          $seg->{blksize};

         $fec->shuffle (\@part, \@idx);

         # now copy check blocks to their destination position
         for my $i (0 .. $#idx) {
            next if $idx[$i] == $i;

            my $src = $part[$i];
            $part[$i] = [$self->{fh}, $blk[$i]{offset}];
            $fec->copy ($src, $part[$i]);
         }

         $fec->set_decode_blocks (\@part, \@idx);
         $fec->decode;
      }

      my $sha1 = new Digest::SHA1;
      open my $dd, "-|", "head -c$filesize \Q$self->{file}\E"
         or die "DD: $!";
      #$dd = Coro::Handle::unblock $dd;
      $sha1->addfile ($dd);
      $sha1 = $sha1->hexdigest;

      if (exists $p->{meta}{document}[0]{info}{checksum}
          and $p->{meta}{document}[0]{info}{checksum} ne $sha1) {
         $self->log ("META: $p->{meta}{document}[0]{info}{checksum} and real checksum $sha1 for $filesize DIFFER");
#         $self->feedback ("CHECKSUM ERROR");
#         terminate;
      }

      truncate $self->{fh}, $filesize;
      sysseek $self->{fh}, 0, 0;

      return ["finish", 1];
   } else {
      $self->log ("splitfile algo '$splitfile->{algo_name}' unknown");
      $self->feedback ("algo unknown");
      terminate;
   }
}

package main;

$|=1;

for (<\Q$QUEUE_HOME\E/*.j>) {
   job->new_from_file ($_);
   print "J";
}
print "\n";

open my $stdin , "<&0" or die;
open my $stdout, ">&1" or die;
cmdline unblock $stdin, unblock $stdout;

EV::loop;

Revision:	1.19
Committed:	Mon Dec 3 01:06:07 2007 UTC (18 years, 9 months ago) by root
Branch:	MAIN
Changes since 1.18:	+25 -14 lines
Log Message:	* empty log message *
#	User	Rev	Content
1	root	1.1	#!/opt/bin/perl
2
3	root	1.14	system "echo $$ >fmd.pid";
4	root	1.19	use Coro::Debug; our $server = new_unix_server Coro::Debug "debug";
5	root	1.14
6	root	1.1	=head1 fmd - the freenet mass downloader
7
8			Fmd is at a very early stage of development (and very hackish, too), as I
9			am learning the basics of freenet myself.
10
11			However, I use it in production, and since it verifies everything it
12			decodes etc., it seems to be quite safe to use, that is, if you know how
13			to debug perl :)
14
15			=head2 FEATURES
16
17			- decoding is done "in place", i.e. all non-checkblock blocks are
18			stored in-place and will not be moved, only checkblocks will
19			be moved to their final position in the file before decoding.
20			- high resistance against failures of fred or fmd
21			- extremely persistent retry behaviour - there is no such thing
22			as a permanent failure.
23			- handles hundreds of simultaneous downloads with grace.
24
25			=head2 ENVIRONMENT
26
27			Set FMD_HOME to a directory (default ~/fmd) where fmd will store it's
28			files. It will not store your porn files or other freenet data outside
29			that directory.
30
31			The subdirectory db will contain a database (soon to go away), while tmp
32			contains queue files and partial splitfiles. All finished files will be
33			moved to the done subdir.
34
35			FREDHOST and FREDPORT do the obvious. Fix these docs if you disagree.
36
37			Also edit the fmd executable for the number of threads and other
38	root	1.14	non-useful constants. The default number (250) works for me, probably not
39	root	1.1	for you.
40
41			=head2 COMMANDS
42
43			=over 4
44
45			=item CHK@... (space or "/") filename
46
47			Just pasting a CHK and a filename sperated by one or more spaces or
48			slashes will add files to the queue. The line can have leading garbage,
49			i.e. you can paste full uris.
50
51			=item <attachment>...</attachment>
52
53			=item <attach>...</attach>
54
55			=item <attached>...</attached>
56
57			Will add frosts mentally deranged pseudo-xml format, soon to be replaced
58			by something even more horrible.
59
60			=item l
61
62			List all jobs by number.
63
64			=item <number> (optionally trailing command)
65
66			Selects the job with the given number for further comamnds that require a current job.
67
68			=item s
69
70			Show the current job. Bot useful right now.
71
72			=item k
73
74			Kill the current job. This will keep the temp. file around. Sorry. (But it
75			could be used to reconstruct the download.. hmm..)
76
77			=item pri<number>
78
79	root	1.2	Set the current job priority to <pri>. The default is 1. A job with higher
80			priority will (on average) get more requests.
81	root	1.1
82	root	1.2	The useful range is probably 0..100, but be careful and limit yourself to
83			small values (<10), otherwise your other downloads might starve!
84	root	1.1
85			=item q
86
87			Kill the command prompt. Yupp.
88
89			=back
90
91			=cut
92
93	root	1.10	use strict;
94
95	root	1.19	use EV;
96			use Coro::EV;
97
98	root	1.1	use Net::FCP;
99	root	1.19	use Storable ();
100	root	1.1	use Time::HiRes;
101	root	1.19	use Coro 4.23;
102	root	1.15	use Coro::Channel;
103	root	1.1	use Coro::Handle;
104			use Coro::Signal;
105			use Coro::Timer;
106	root	1.9	use Coro::AIO;
107	root	1.19	use Coro::Storable ();
108	root	1.1	use List::Util;
109			use Digest::SHA1;
110			use Algorithm::FEC;
111			use Digest::SHA1;
112			use Net::FCP::Util;
113			use POSIX ();
114
115	root	1.9	Coro::AIO::max_poll_time 0.01;
116			Coro::AIO::min_parallel 1;
117	root	1.19	Coro::AIO::max_parallel 32;
118	root	1.9
119	root	1.1	$\|=1;
120
121	root	1.17	our $MAX_TXN = 400; # use max. this many transactions in parallel
122	root	1.19	our @HTL = (3,5,10,15,20);
123	root	1.1	our $VERIFY_CHK = 1; # verify all blocks, again and again (only useful to debugging).
124			our $FMD_HOME = $ENV{FMD_HOME} \|\| "$ENV{HOME}/fmd";
125
126			our $FCP = new Net::FCP;
127
128			defined $FMD_HOME
129			or die "you currently must define FMD_HOME to a persistent directory";
130
131			mkdir $FMD_HOME, 0700;
132
133	root	1.17	our $QUEUE_HOME = "$FMD_HOME/job";
134	root	1.1	mkdir $QUEUE_HOME, 0700;
135	root	1.17	our $DATA_HOME = "$FMD_HOME/tmp";
136			mkdir $DATA_HOME, 0700;
137	root	1.1	our $DONE_HOME = "$FMD_HOME/done";
138			mkdir $DONE_HOME, 0700;
139
140			our %job;
141
142			sub push_key {
143			my ($key, $title) = @_;
144
145			for my $job (values %job) {
146			if ($job->{p}{key} eq $key) {
147			warn "job $job->{id} already works on this, not adding";
148			return;
149			}
150			}
151
152			my $job = job->new_from_key ($key, $title);
153			warn "added as job $job->{id}\n";
154			$job;
155			}
156
157			sub cmdline {
158			my ($i, $o) = @_;
159
160			my $cmd = async {
161			my $job;
162			while (print $o "> " and defined ($_ = <$i>)) {
163			chomp;
164			if (/<attach(?:ment\|ed\|)>(.) \ (CHK[^<]+)<\/attach/) {
165			$job = push_key $2, $1;
166	root	1.7	} elsif (/(CHK\@[a-zA-Z0-9,~\-]{54})[\/ ]+(.?)\s$/) {
167	root	1.1	$job = push_key $1, $2;
168			} elsif (s/^(\d+)//) {
169			if ($job = $job{$1}) {
170			print $o delete $job->{log};
171			if ($job->{input}) {
172			}
173			}
174			redo;
175			} elsif (/^q/) {
176			close $i;
177			close $o;
178			} elsif (/^l/) {
179			for my $job (sort { $a->{id} <=> $b->{id} } values %job) {
180			print $o "$_ $job->{id}: $job->{p}{key} $job->{p}{title} $job->{status}\n";
181			}
182	root	1.16	# } elsif (/^pri\s*(\d+)/) {
183			# if ($job) {
184			# $job->{p}{pri} = $1;
185			# $job->save;
186			# }
187	root	1.1	} elsif (/^s$/) {
188			print $o $job->show if $job;
189			} elsif (/^k$/) {
190			$job->kill if $job;
191	root	1.14	} elsif (/^p(.*)/) {
192	root	1.16	print $o +(join " ", eval $1), "\n";
193	root	1.1	} elsif (/\S/) {
194			#
195			} else {
196			print $o "?\n";
197			}
198			for my $job (sort { $a->{id} <=> $b->{id} } values %job) {
199			if ($job->{_input}) {
200			print $o "> $job->{id} $job->{title} $job->{status}\n";
201			}
202			}
203			}
204			};
205			}
206
207			package job;
208
209	root	1.10	use strict;
210
211	root	1.1	use Coro;
212	root	1.9	use Coro::AIO;
213	root	1.1	use Fcntl;
214			use IO::Handle;
215	root	1.6	use Array::Heap2;
216	root	1.1
217	root	1.14	our $count = 0;
218	root	1.1
219			sub new {
220			my $class = shift;
221
222			my $self = bless { @_ }, $class;
223
224	root	1.17	for my $job (values %job) {
225			if ($job->{p}{key} eq $self->{p}{key}) {
226			warn "job $job->{id} already works on this, not adding";
227	root	1.19	aio_unlink $self->{job};
228	root	1.17	return;
229			}
230			}
231
232	root	1.9	$self->{p}{title} !~ /\//
233			or die "$self->{p}{title}: malformed key\n";
234
235	root	1.13	$self->{p}{title} =~ s/\s+$//;
236			$self->{p}{title} =~ s/\n/_/g;
237
238	root	1.1	$self->{id} = ++$count;
239			$self->{job} \|\|= "$QUEUE_HOME/" . Time::HiRes::time . ":$count.j";
240
241			$job{$self->{id}} = $self;
242
243			$self->start;
244	root	1.19	$self
245	root	1.1	}
246
247			sub new_from_key {
248			my ($class, $key, $title) = @_;
249			$class->new (p => { key => $key, title => $title, state => "examine" });
250			}
251
252			sub new_from_file {
253			my ($class, $path) = @_;
254			$class->new (job => $path, p => Storable::retrieve $path);
255			}
256
257			sub save {
258			my ($self) = @_;
259	root	1.19	if (my $fh = aio_open "$self->{job}~", O_CREAT\|O_TRUNC\|O_WRONLY, 0600) {
260			aio_write $fh, 0, undef, Coro::Storable::blocking_nfreeze $self->{p}, 0;
261			aio_fsync $fh;
262			aio_close $fh;
263			aio_rename "$self->{job}~", $self->{job};
264			aio_pathsync $QUEUE_HOME;
265			}
266	root	1.1	}
267
268			sub clean {
269			my ($self) = @_;
270
271			delete $job{$self->{id}};
272			$self->save;
273	root	1.19	system "mv", $self->{job}, "$DONE_HOME/$self->{p}{title}.job";
274	root	1.12	unlink $self->{job};
275	root	1.1	}
276
277			sub kill {
278			my ($self) = @_;
279
280			$self->clean;
281			$self->{coro}->cancel;
282			}
283
284	root	1.14	our @queue;
285			our $queue_change = new Coro::Signal;
286			our $queue_alloc = 0;
287	root	1.1
288			async {
289			for (;;) {
290			while (@queue
291			and (($queue[0][0] > 10 and $queue_alloc < $MAX_TXN)
292			or ($queue[0][0] > 1 and $queue_alloc < $MAX_TXN - 3)
293			or $queue_alloc < $MAX_TXN - 5)) {
294			(pop_heap @queue)->[1]->send;
295			$queue_alloc++;
296	root	1.4	Coro::Timer::sleep 0.05;
297	root	1.1	}
298			$queue_change->wait;
299			}
300			};
301
302			sub txn_begin {
303			my ($pri) = @_;
304			my $sig = new Coro::Signal;
305
306			#warn "txn_begin $pri\n";#d#
307			push_heap @queue, [$pri, $sig];
308			$queue_change->send;
309			$sig->wait;
310			}
311
312			sub txn_end {
313			$queue_alloc--;
314			$queue_change->send;
315	root	1.15	}
316
317			sub txn_client_get {
318			my %arg = @_;
319
320			txn_begin $arg{pri};
321			$FCP->txn_client_get ($arg{uri}, $arg{htl})->cb (unblock_sub {
322			txn_end;
323
324			$arg{cb}->(@_);
325			});
326	root	1.1	}
327
328			sub fetch_uri {
329			my ($pri, $uri) = @_;
330
331			for(my $count = 1; ; $count += 0.3) {
332			for my $htl (@HTL) {
333	root	1.4	txn_begin time + $htl + $count;
334	root	1.1	my ($meta, $data) = eval { @{ $FCP->client_get ($uri, $htl) } };
335			txn_end;
336			if ($@) {
337			if (UNIVERSAL::isa ($@, Net::FCP::Exception::)) {
338			if ($@->type ("data_not_found")
339			\|\| $@->type ("route_not_found")) {
340			next;
341			}
342			if ($@->type ("short_data")) {
343			warn "(short_data, redo)\n";
344			redo;
345			}
346			die;
347			}
348			}
349			if (defined $data) {
350			return ($meta, $data);
351			}
352			}
353			}
354
355			die;
356			}
357
358			sub log {
359			my ($self, $text) = @_;
360			my $time = POSIX::strftime "%H:%M:%S", localtime time;
361	root	1.3	warn "$time $self->{id},$self->{p}{pri}: $text\n";
362	root	1.1	$self->{log} .= "$time $text\n";
363			}
364
365			sub feedback {
366			my ($self, $prompt) = @_;
367			$self->{input} = [$Coro::current, $prompt];
368			Coro::schedule;
369			}
370
371			sub show {
372			my ($self) = @_;
373
374			"ID: $self->{id}\n"
375			. "Title: $self->{p}{title}\n"
376	root	1.18	. "Blocks#: " . @{$self->{p}{blk} \|\| []} . "\n"
377	root	1.1	. "Blocks: " . (join "", map {
378			$_->{done} ? "+" : "-"
379	root	1.17	} @{$self->{p}{blk} \|\| []}) . "\n" .
380	root	1.11	""
381	root	1.1	}
382
383	root	1.14	our $id;
384	root	1.1
385			sub MAXSEG (){ 12810241024 }
386			sub MINSEG (){ 6* 128*1024 }
387
388			sub blocksize($) {
389			return
390			$_[0] >= 6410241024 ? 1024*1024
391			: $_[0] >= 3210241024 ? 512*1024
392			: $_[0] >= 10241024 ? 2561024
393			: 128*1024;
394			}
395
396			sub start {
397			my ($self) = @_;
398
399			$self->{p}{pri} \|\|= 1;
400			$self->{p}{state} \|\|= "examine";
401
402	root	1.17	$self->{job} =~ /\/([^\/]*)\.j$/ or die "$self->{job}: missing .j";
403			$self->{file} = "$DATA_HOME/$1.d";
404	root	1.19	sysopen $self->{fh}, $self->{file}, O_RDWR\|O_CREAT, 0600
405			# $self->{fh} = aio_open $self->{file}, O_RDWR\|O_CREAT, 0600
406	root	1.1	or die "$self->{file}: $!";
407
408			$self->{status} = "starting";
409			$self->{coro} = async {
410	root	1.19	$self->save;
411
412	root	1.1	for(;;) {
413			my ($state, @args) = ref $self->{p}{state} ? @{$self->{p}{state}} : $self->{p}{state};
414			my $next = eval { $self->can ("state_$state")->($self, @args) };
415			if ($@) {
416			$self->log ($@);
417			$next = $self->feedback ("continue with state: ");
418			}
419	root	1.10	$self->log ($self->{status} = "STATE CHANGE: ". join ", ", ref $next ? @$next : $next);
420	root	1.1	$self->{p}{state} = $next;
421			$self->save;
422			}
423			};
424			}
425
426			sub state_finish {
427			my ($self, $save) = @_;
428
429			if ($save) {
430	root	1.10	aio_fsync $self->{fh};
431	root	1.1	close $self->{fh};
432
433	root	1.10	aio_unlink "$DONE_HOME/$self->{p}{title}";
434			aio_link $self->{file}, "$DONE_HOME/$self->{p}{title}"
435			and die "link: $self->{file} => $DONE_HOME/$self->{p}{title}: $!";
436	root	1.19	aio_pathsync $DONE_HOME;
437	root	1.1	}
438			$self->clean;
439
440	root	1.10	aio_unlink $self->{file};
441	root	1.1
442			$self->{status} = "finished";
443			$self->feedback ("finished");
444			terminate;
445			}
446
447			sub state_examine {
448			my ($self) = @_;
449			my $p = $self->{p};
450
451			$self->{status} = "initial fetch";
452
453			for (;;) {
454			$self->log ("fetching $p->{key} (=$p->{title})");
455
456			($p->{meta}, $p->{data}) = fetch_uri 100, "freenet:$p->{key}";
457			$self->save;
458			#use PApp::Util; print STDERR PApp::Util::dumpval [keys %{$meta->{document}[0]{split_file}}];
459			$self->log ("type $p->{meta}{document}[0]{info}{format}");
460
461			if (my $splitfile = $p->{meta}{document}[0]{split_file}) {
462			return "splitfile";
463			} elsif ((defined $p->{data}) and (length $p->{data})) {
464	root	1.8	syswrite $self->{fh}, delete $p->{data};
465	root	1.12	aio_fsync $self->{fh};
466	root	1.1	return ["finish", 1];
467			}
468
469			$self->log ("EMPTY, retrying in an hour");
470			Coro::Timer::sleep 3600;
471			}
472
473			}
474
475			sub state_splitfile {
476			my ($self) = @_;
477			my $p = $self->{p};
478
479			my $splitfile = $p->{meta}{document}[0]{split_file};
480			my $filesize = hex $splitfile->{size};
481
482			if ($splitfile->{algo_name} eq "OnionFEC_a_1_2") {
483			my $data_packets = hex $splitfile->{block_count};
484			my $check_packets = hex $splitfile->{check_block_count};
485
486			my $blk = ($p->{blk} \|\|= []);
487
488			unless (@$blk) {
489			for (1..$data_packets) {
490			push @$blk, {
491			uri => $splitfile->{block}{sprintf "%x", $_},
492			};
493			}
494			for (1..$check_packets) {
495			push @$blk, {
496			uri => $splitfile->{check_block}{sprintf "%x", $_},
497			};
498			}
499			}
500
501			my @segments;
502			my $segments = 0;
503
504			{
505			# that is a horrible algorithm :(, these freenet freaks are... java-disabled
506			# hardcoding lots of magic parameters is soo dumb.
507			my $size = $filesize;
508			my $offset = 0;
509			my $offset2 = ($filesize & ~(10241024-1)) + 10241024; # leave enough space after last data block
510			my $idx = 0;
511			my $idx2 = $data_packets;
512			my @redundandy = (0,1,2); # maybe OnionFAC_a_1_2 means 1/2 redundancy(?)
513
514			while ($size > 0) {
515			my $segsize = $size >= MAXSEG ? MAXSEG : $size <= MINSEG ? MINSEG : $size;
516			my $blksize = blocksize $segsize;
517			my $seg =
518			{
519			id => $segments++,
520			todo => int (($segsize + $blksize - 1) / $blksize),
521			done => 0,
522			blk => [],
523			blksize => $blksize,
524			};
525
526			push @segments, $seg;
527			$size -= $segsize;
528
529			while ($segsize > 0) {
530			push @{$seg->{blk}}, $idx;
531			for ($blk->[$idx++]) {
532			$_->{offset} = $offset;
533			#$_->{size} = $blksize > $segsize ? $segsize : $blksize; # WRONG
534			$_->{size} = $blksize;
535			$_->{seg} = $seg;
536			}
537
538			$segsize -= $blksize;
539			$offset += $blksize;
540
541			if (($redundandy[0] += $redundandy[1]) >= $redundandy[2]) {
542			$redundandy[0] -= $redundandy[2];
543
544			push @{$seg->{blk}}, $idx2;
545			for ($blk->[$idx2++]) {
546			$_->{offset} = $offset2;
547			$_->{size} = $blksize;
548			$_->{seg} = $seg;
549			}
550
551			$offset2 += $blksize;
552			}
553			}
554			}
555
556			$idx == $data_packets
557			or die "$self->{id}/$p->{tile} $self->{job}\nidx $idx != data_packets $data_packets";
558			$idx2 == $data_packets + $check_packets
559			or die "$self->{id}/$p->{tile} $self->{job}\nidx2 $idx2 != data_packets $data_packets + check_packets $check_packets";
560			}
561
562			for (@$blk) {
563			++$_->{seg}{done} if $_->{done};
564			delete $_->{htl};
565			}
566
567			my $fail = 0;
568			my $sig = new Coro::Signal;
569
570			$self->{status} = "splitfile fetch (" . @$blk . " blocks)";
571
572			my @txn;
573
574			for (;;) {
575			for my $id (0 .. $#$blk) {
576			my $blk = $blk->[$id];
577
578			next if $txn[$id] \|\| $blk->{done} \|\| $blk->{seg}{todo} <= $blk->{seg}{done};
579
580			my $htl = $HTL[$blk->{htl}++ % @HTL];
581	root	1.5	my $pri = int time + $htl / 20 * 7200 * rand;
582	root	1.1
583	root	1.5	#warn $self->{id} . ", GET<$htl, $pri>\n";#d#
584	root	1.15	$txn[$id] \|\|= txn_client_get pri => $pri, uri => $blk->{uri}, htl => $htl, cb => sub {
585	root	1.1	undef $txn[$id];
586
587			my $seg = $blk->{seg};
588
589			my ($meta, $data) = eval { @{ $_[0]->result } };
590
591			if (defined $data) {
592			$blk->{size} == length $data
593			or die sprintf "block $id expected size %d, got %d\n", $blk->{size}, length $data;
594
595	root	1.9	(length $data) == (aio_write $self->{fh}, $blk->{offset}, (length $data), $data, 0)
596	root	1.1	or die "unable to write chunk to disk, not setting valid flag";
597	root	1.9	aio_fsync $self->{fh};
598	root	1.1
599			$blk->{done} = 1;
600			$blk->{meta} = $meta->{raw} if length $meta->{raw};#d#
601			$seg->{done}++;
602			$self->save;
603
604			$::htl_sum += $htl;
605			$::htl_cnt++;
606
607	root	1.4	$self->log (sprintf "got block $seg->{id}.$id %d ($seg->{done}/$seg->{todo}) at htl $htl (%f) and pri $pri",
608			length $data, $::htl_sum / $::htl_cnt);
609	root	1.1	} else {
610			if ($@) {
611			if ($@->type ("data_not_found")) {
612			# nop
613			} elsif ($@->type ("network_error")) {
614			$self->log ("$@, retrying in 1s");
615			CORE::sleep 1;
616			} else {
617			$self->log ("$@");
618			}
619			}
620			++$fail;
621			}
622			$self->{status} = "splitfile fetch ($seg->{done}/$seg->{todo}, $fail failed)";
623
624			$sig->send;
625	root	1.15	};
626	root	1.1	}
627
628			for my $seg (@segments) {
629			if ($seg->{done} >= $seg->{todo} && !$seg->{finished}) {
630
631			$self->log ("segment done, cancelling segment $seg->{id}");
632			for my $id (@{$seg->{blk}}) {
633			(delete $txn[$id])->cancel if $txn[$id];
634			}
635
636	root	1.10	my $verify;
637	root	1.1	for my $id (@{$seg->{blk}}) {
638			my $blk = $blk->[$id];
639			if ($blk->{done}) {
640	root	1.10	aio_read $self->{fh}, $blk->{offset}, $blk->{size}, my $buf, 0;
641	root	1.1
642			my $k1 = Net::FCP::Util::extract_chk_hash $blk->{uri};
643			my $k2 = Net::FCP::Util::generate_chk_hash $blk->{meta}, $buf;
644
645			if ($k1 ne $k2) {
646	root	1.10	$verify .= "v";
647	root	1.1	#warn sprintf "$p->{title} block $id BROKEN (%s != %s)", (unpack "H", $k1), (unpack "H", $k2);
648			$blk->{done} = 0;
649			$seg->{done}--;
650			$self->save;
651			} else {
652	root	1.10	$verify .= "V";
653	root	1.1	}
654			}
655			}
656	root	1.10	$self->log ("verified segment $seg->{id}");
657			$self->log ($verify);
658	root	1.1
659			if ($seg->{done} >= $seg->{todo} && !$seg->{finished}) {
660			$self->log ("verified segment OK $seg->{id}");
661			$seg->{finished}++;
662			$segments--;
663			} else {
664			$self->log ("verified segment NOT OK $seg->{id}");
665			}
666			}
667			}
668
669			last unless $segments;
670
671			$sig->wait;
672			}
673
674			$self->log ("decoding < $self->{job} $self->{file} $filesize >");
675
676			for my $seg (@segments) {
677			my @part;
678			my @idx;
679			my @blk = map $blk->[$_], sort { $a <=> $b } @{$seg->{blk}};
680
681			for my $id (0 .. $#blk) {
682			my $blk = $blk[$id];
683			next unless $blk->{done};
684
685			push @part, [$self->{fh}, $blk->{offset}];
686			push @idx, $id;
687
688			last if @idx == $seg->{todo};
689			}
690
691			my $fec = new Algorithm::FEC
692			$seg->{todo},
693			scalar @blk,
694			$seg->{blksize};
695
696			$fec->shuffle (\@part, \@idx);
697
698			# now copy check blocks to their destination position
699			for my $i (0 .. $#idx) {
700			next if $idx[$i] == $i;
701
702			my $src = $part[$i];
703			$part[$i] = [$self->{fh}, $blk[$i]{offset}];
704			$fec->copy ($src, $part[$i]);
705			}
706
707			$fec->set_decode_blocks (\@part, \@idx);
708			$fec->decode;
709			}
710
711			my $sha1 = new Digest::SHA1;
712			open my $dd, "-\|", "head -c$filesize \Q$self->{file}\E"
713			or die "DD: $!";
714			#$dd = Coro::Handle::unblock $dd;
715			$sha1->addfile ($dd);
716			$sha1 = $sha1->hexdigest;
717
718			if (exists $p->{meta}{document}[0]{info}{checksum}
719			and $p->{meta}{document}[0]{info}{checksum} ne $sha1) {
720			$self->log ("META: $p->{meta}{document}[0]{info}{checksum} and real checksum $sha1 for $filesize DIFFER");
721	root	1.9	# $self->feedback ("CHECKSUM ERROR");
722			# terminate;
723	root	1.1	}
724
725			truncate $self->{fh}, $filesize;
726			sysseek $self->{fh}, 0, 0;
727
728			return ["finish", 1];
729			} else {
730			$self->log ("splitfile algo '$splitfile->{algo_name}' unknown");
731			$self->feedback ("algo unknown");
732			terminate;
733			}
734			}
735
736			package main;
737
738			$\|=1;
739
740	root	1.17	for (<\Q$QUEUE_HOME\E/*.j>) {
741			job->new_from_file ($_);
742			print "J";
743			}
744			print "\n";
745	root	1.1
746			open my $stdin , "<&0" or die;
747			open my $stdout, ">&1" or die;
748			cmdline unblock $stdin, unblock $stdout;
749
750	root	1.19	EV::loop;
751	root	1.1