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author | Eric Wong <e@80x24.org> | 2020-12-31 13:51:26 +0000 |
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committer | Eric Wong <e@80x24.org> | 2021-01-01 05:00:38 +0000 |
commit | 49350d47032788a7c1213a64e81ad07fc2d41b65 (patch) | |
tree | 69e134f174a4a77dc1db2f2691b6e61c0ffb1b3c /lib/PublicInbox/MboxReader.pm | |
parent | da089825419835c37afbdf7b7c5f0448766bdb27 (diff) | |
download | public-inbox-49350d47032788a7c1213a64e81ad07fc2d41b65.tar.gz |
This is only lightly-tested against stuff LeiToMail generates and will need real-world tests to validate.
Diffstat (limited to 'lib/PublicInbox/MboxReader.pm')
-rw-r--r-- | lib/PublicInbox/MboxReader.pm | 124 |
1 files changed, 124 insertions, 0 deletions
diff --git a/lib/PublicInbox/MboxReader.pm b/lib/PublicInbox/MboxReader.pm new file mode 100644 index 00000000..e1944aaf --- /dev/null +++ b/lib/PublicInbox/MboxReader.pm @@ -0,0 +1,124 @@ +# Copyright (C) 2020 all contributors <meta@public-inbox.org> +# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt> + +# reader for mbox variants we support +package PublicInbox::MboxReader; +use strict; +use v5.10.1; +use Data::Dumper; +$Data::Dumper::Useqq = 1; # should've been the default, for bad data + +my $from_strict = + qr/^From \S+ +\S+ \S+ +\S+ [^\n:]+:[^\n:]+:[^\n:]+ [^\n:]+\n/sm; + +sub _mbox_from { + my ($mbfh, $from_re, $eml_cb, @arg) = @_; + my $buf = ''; + my @raw; + while (defined(my $r = read($mbfh, $buf, 65536, length($buf)))) { + if ($r == 0) { # close here to check for "curl --fail" + close($mbfh) or die "error closing mbox: \$?=$? $!"; + @raw = ($buf); + } else { + @raw = split(/$from_strict/mos, $buf, -1); + next if scalar(@raw) == 0; + $buf = pop(@raw); # last bit may be incomplete + } + @raw = grep /[^ \t\r\n]/s, @raw; # skip empty messages + while (defined(my $raw = shift @raw)) { + $raw =~ s/\r?\n\z//s; + $raw =~ s/$from_re/$1/gms; + my $eml = PublicInbox::Eml->new(\$raw); + $eml_cb->($eml, @arg); + } + return if $r == 0; # EOF + } + die "error reading mboxo/mboxrd handle: $!"; +} + +sub mboxrd { + my (undef, $mbfh, $eml_cb, @arg) = @_; + _mbox_from($mbfh, qr/^>(>*From )/ms, $eml_cb, @arg); +} + +sub mboxo { + my (undef, $mbfh, $eml_cb, @arg) = @_; + _mbox_from($mbfh, qr/^>(From )/ms, $eml_cb, @arg); +} + +sub _cl_body { + my ($mbfh, $bref, $cl) = @_; + my $body = substr($$bref, 0, $cl, ''); + my $need = $cl - length($body); + if ($need > 0) { + $mbfh or die "E: needed $need bytes after EOF"; + defined(my $r = read($mbfh, $body, $need, length($body))) or + die "E: read error: $!\n"; + $r == $need or die "E: read $r of $need bytes\n"; + } + \$body; +} + +sub _extract_hdr { + my ($ref) = @_; + if (index($$ref, "\r\n") < 0 && (my $pos = index($$ref, "\n\n")) >= 0) { + # likely on *nix + \substr($$ref, 0, $pos + 2, ''); # sv_chop on $$ref + } elsif ($$ref =~ /\r?\n\r?\n/s) { + \substr($$ref, 0, $+[0], ''); # sv_chop on $$ref + } else { + undef + } +} + +sub _mbox_cl ($$$;@) { + my ($mbfh, $uxs_from, $eml_cb, @arg) = @_; + my $buf = ''; + while (defined(my $r = read($mbfh, $buf, 65536, length($buf)))) { + if ($r == 0) { # detect "curl --fail" + close($mbfh) or + die "error closing mboxcl/mboxcl2: \$?=$? $!"; + undef $mbfh; + } + while (my $hdr = _extract_hdr(\$buf)) { + $$hdr =~ s/\A[\r\n]*From [^\n]*\n//s or + die "E: no 'From ' line in:\n", Dumper($hdr); + my $eml = PublicInbox::Eml->new($hdr); + my @cl = $eml->header_raw('Content-Length'); + my $n = scalar(@cl); + $n == 0 and die "E: Content-Length missing in:\n", + Dumper($eml->as_string); + $n == 1 or die "E: multiple ($n) Content-Length in:\n", + Dumper($eml->as_string); + $cl[0] =~ /\A[0-9]+\z/ or die + "E: Content-Length `$cl[0]' invalid\n", + Dumper($eml->as_string); + if (($eml->{bdy} = _cl_body($mbfh, \$buf, $cl[0]))) { + $uxs_from and + ${$eml->{bdy}} =~ s/^>From /From /sgm; + } + $eml_cb->($eml, @arg); + } + if ($r == 0) { + $buf =~ /[^ \r\n\t]/ and + warn "W: leftover at end of mboxcl/mboxcl2:\n", + Dumper(\$buf); + return; + } + } + die "error reading mboxcl/mboxcl2 handle: $!"; +} + +sub mboxcl { + my (undef, $mbfh, $eml_cb, @arg) = @_; + _mbox_cl($mbfh, 1, $eml_cb, @arg); +} + +sub mboxcl2 { + my (undef, $mbfh, $eml_cb, @arg) = @_; + _mbox_cl($mbfh, undef, $eml_cb, @arg); +} + +sub new { bless \(my $x), __PACKAGE__ } + +1; |