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| author | Eric Wong <normalperson@yhbt.net> | 2014-02-25 03:01:04 +0000 |
|---|---|---|
| committer | Eric Wong <normalperson@yhbt.net> | 2014-02-25 03:31:25 +0000 |
| commit | 25cc5a69a4a38076ea9e587dfa75165fef2273da (patch) | |
| tree | 5a799335ca505f4ec72431e4497b0ab10c7ff872 | |
| parent | 858f0a2960123d6d2cbced1bb18e4e5e524df21e (diff) | |
| download | public-inbox-25cc5a69a4a38076ea9e587dfa75165fef2273da.tar.gz | |
This is to keep content accessible to search engines.
| -rw-r--r-- | lib/PublicInbox/View.pm | 99 | ||||
| -rw-r--r-- | t/view.t | 55 |
2 files changed, 154 insertions, 0 deletions
diff --git a/lib/PublicInbox/View.pm b/lib/PublicInbox/View.pm new file mode 100644 index 00000000..125fcd62 --- /dev/null +++ b/lib/PublicInbox/View.pm @@ -0,0 +1,99 @@ +# Copyright (C) 2014, Eric Wong <normalperson@yhbt.net> and all contributors +# License: AGPLv3 or later (https://www.gnu.org/licenses/agpl-3.0.txt) +package PublicInbox::View; +use strict; +use warnings; +use CGI qw/escapeHTML escape/; +use Encode qw/decode encode/; +use Encode::MIME::Header; + +# only one public function: +sub as_html { + my ($class, $mime) = @_; + + headers_to_html_header($mime) . + multipart_text_as_html($mime) . + "</pre>\n"; +} + +# only private functions below. + +sub multipart_text_as_html { + my ($mime) = @_; + my $rv = ""; + my $part_nr = 0; + + # scan through all parts, looking for displayable text + $mime->walk_parts(sub { + my ($part) = @_; + return if $part->subparts; # walk_parts already recurses + + my $part_type = $part->content_type; + if ($part_type =~ m!\btext/[a-z0-9\+\._-]+\b!i) { + my $fn = $part->filename; + + if ($part_nr > 0) { + defined($fn) or $fn = "part #$part_nr"; + $rv .= add_filename_line($fn); + } + + # n.b. $part->body should already be decoded if text + $rv .= escapeHTML($part->body); + $rv .= "\n" unless $rv =~ /\n\z/s; + } else { + $rv .= "-- part #$part_nr "; + $rv .= escapeHTML($part_type); + $rv .= " skipped\n"; + } + ++$part_nr; + }); + $rv; +} + +sub add_filename_line { + my ($fn) = @_; + my $len = 72; + my $pad = "-"; + + $len -= length($fn); + $pad x= ($len/2) if ($len > 0); + "$pad " . escapeHTML($fn) . " $pad\n"; +} + +sub headers_to_html_header { + my ($simple) = @_; + + my $rv = ""; + my @title; + foreach my $h (qw(From To Cc Subject Date)) { + my $v = $simple->header($h); + defined $v or next; + $v = decode("MIME-Header", $v); + $v = encode("utf8", $v); + $v = escapeHTML($v); + $v =~ tr/\n/ /; + $rv .= "$h: $v\n"; + + if ($h eq "From" || $h eq "Subject") { + push @title, $v; + } + } + + foreach my $h (qw(Message-ID In-Reply-To)) { + my $v = $simple->header($h); + defined $v or next; + $v =~ tr/<>//d; + my $html = escapeHTML($v); + my $href = escapeHTML(escape($v)); + $rv .= "$h: <a href=\"$href\">$html</a>\n"; + } + + $rv .= "\n"; + + return ("<html><head><title>". + join(' - ', @title) . + '</title></head><body><pre style="white-space:pre-wrap">' . + $rv); +} + +1; diff --git a/t/view.t b/t/view.t new file mode 100644 index 00000000..93372d16 --- /dev/null +++ b/t/view.t @@ -0,0 +1,55 @@ +# Copyright (C) 2013, Eric Wong <normalperson@yhbt.net> and all contributors +# License: AGPLv3 or later (https://www.gnu.org/licenses/agpl-3.0.txt) +use strict; +use warnings; +use Test::More; +use Email::MIME; +use PublicInbox::View; + +# plain text +{ + my $s = Email::Simple->create( + header => [ + From => 'a@example.com', + To => 'b@example.com', + 'Content-Type' => 'text/plain', + 'Message-ID' => '<hello@example.com>', + Subject => 'this is a subject', + ], + body => "hello world\n", + ); + $s = Email::MIME->new($s->as_string); + my $html = PublicInbox::View->as_html($s); + + # ghetto + like($html, qr/<a href="hello%40/s, "MID link present"); + like($html, qr/hello world\b/, "body present"); +} + +# multipart crap +{ + my $parts = [ + Email::MIME->create( + attributes => { content_type => 'text/plain', }, + body => 'hi', + ), + Email::MIME->create( + attributes => { content_type => 'text/plain', }, + body => 'bye', + ) + ]; + my $mime = Email::MIME->create( + header_str => [ + From => 'a@example.com', + Subject => 'blargh', + 'Message-ID' => '<blah@xeample.com>', + 'In-Reply-To' => '<irp@xeample.com>', + ], + parts => $parts, + ); + + my $html = PublicInbox::View->as_html($mime); + print $html; +} + +done_testing(); |