# Copyright (C) 2014-2015 all contributors # License: AGPLv3 or later (https://www.gnu.org/licenses/agpl-3.0.txt) # # represents a header value in various forms. Used for HTML generation # in our web interface(s) package PublicInbox::Hval; use strict; use warnings; use Encode qw(find_encoding); use PublicInbox::MID qw/mid_clean mid_escape/; use base qw/Exporter/; our @EXPORT_OK = qw/ascii_html/; # for user-generated content (UGC) which may have excessively long lines # and screw up rendering on some browsers. This is the only CSS style # feature we use. use constant STYLE => ''; my $enc_ascii = find_encoding('us-ascii'); sub new { my ($class, $raw, $href) = @_; # we never care about trailing whitespace $raw =~ s/\s*\z//; bless { raw => $raw, href => defined $href ? $href : $raw, }, $class; } sub new_msgid { my ($class, $msgid) = @_; $class->new($msgid, mid_escape($msgid)); } sub new_oneline { my ($class, $raw) = @_; $raw = '' unless defined $raw; $raw =~ tr/\t\n / /s; # squeeze spaces $raw =~ tr/\r//d; # kill CR $class->new($raw); } my %xhtml_map = ( '"' => '"', '&' => '&', "'" => ''', '<' => '<', '>' => '>', ); $xhtml_map{chr($_)} = sprintf('\\x%02x', $_) for (0..31); # some of these overrides are standard C escapes so they're # easy-to-understand when rendered. $xhtml_map{"\x00"} = '\\0'; # NUL $xhtml_map{"\x07"} = '\\a'; # bell $xhtml_map{"\x08"} = '\\b'; # backspace $xhtml_map{"\x09"} = "\t"; # obvious to show as-is $xhtml_map{"\x0a"} = "\n"; # obvious to show as-is $xhtml_map{"\x0b"} = '\\v'; # vertical tab $xhtml_map{"\x0c"} = '\\f'; # form feed $xhtml_map{"\x0d"} = '\\r'; # carriage ret (not preceding \n) $xhtml_map{"\x1b"} = '^['; # ASCII escape (mutt seems to escape this way) $xhtml_map{"\x7f"} = '\\x7f'; # DEL sub ascii_html { my ($s) = @_; $s =~ s/\r\n/\n/sg; # fixup bad line endings $s =~ s/([<>&'"\x7f\x00-\x1f])/$xhtml_map{$1}/sge; $enc_ascii->encode($s, Encode::HTMLCREF); } sub as_html { ascii_html($_[0]->{raw}) } sub raw { if (defined $_[1]) { $_[0]->{raw} = $_[1]; } else { $_[0]->{raw}; } } sub prurl { my ($env, $u) = @_; index($u, '//') == 0 ? "$env->{'psgi.url_scheme'}:$u" : $u; } 1;