X-Git-Url: http://git.vanrenterghem.biz/git.ikiwiki.info.git/blobdiff_plain/03dc63588c881ac38fcd8c7b5fefdc564e343b09..d35a2bd2ded70156250808684e859dbbc50f81db:/IkiWiki/Plugin/htmlscrubber.pm diff --git a/IkiWiki/Plugin/htmlscrubber.pm b/IkiWiki/Plugin/htmlscrubber.pm index 540662c2b..7398c8478 100644 --- a/IkiWiki/Plugin/htmlscrubber.pm +++ b/IkiWiki/Plugin/htmlscrubber.pm @@ -5,49 +5,110 @@ use warnings; use strict; use IkiWiki 2.00; +# This regexp matches urls that are in a known safe scheme. +# Feel free to use it from other plugins. +our $safe_url_regexp; + sub import { #{{{ + hook(type => "getsetup", id => "htmlscrubber", call => \&getsetup); hook(type => "sanitize", id => "htmlscrubber", call => \&sanitize); + + # Only known uri schemes are allowed to avoid all the ways of + # embedding javascrpt. + # List at http://en.wikipedia.org/wiki/URI_scheme + my $uri_schemes=join("|", map quotemeta, + # IANA registered schemes + "http", "https", "ftp", "mailto", "file", "telnet", "gopher", + "aaa", "aaas", "acap", "cap", "cid", "crid", + "dav", "dict", "dns", "fax", "go", "h323", "im", "imap", + "ldap", "mid", "news", "nfs", "nntp", "pop", "pres", + "sip", "sips", "snmp", "tel", "urn", "wais", "xmpp", + "z39.50r", "z39.50s", + # Selected unofficial schemes + "aim", "callto", "cvs", "ed2k", "feed", "fish", "gg", + "irc", "ircs", "lastfm", "ldaps", "magnet", "mms", + "msnim", "notes", "rsync", "secondlife", "skype", "ssh", + "sftp", "smb", "sms", "snews", "webcal", "ymsgr", + ); + # data is a special case. Allow data:image/*, but + # disallow data:text/javascript and everything else. + $safe_url_regexp=qr/^(?:(?:$uri_schemes):|data:image\/|[^:]+(?:$|\/))/i; } # }}} +sub getsetup () { #{{{ + return + plugin => { + safe => 1, + rebuild => undef, + }, + htmlscrubber_skip => { + type => "pagespec", + example => "!*/Discussion", + description => "PageSpec specifying pages not to scrub", + link => "ikiwiki/PageSpec", + safe => 1, + rebuild => undef, + }, +} #}}} + sub sanitize (@) { #{{{ my %params=@_; + + if (exists $config{htmlscrubber_skip} && + length $config{htmlscrubber_skip} && + exists $params{destpage} && + pagespec_match($params{destpage}, $config{htmlscrubber_skip})) { + return $params{content}; + } + return scrubber()->scrub($params{content}); } # }}} my $_scrubber; sub scrubber { #{{{ return $_scrubber if defined $_scrubber; - + eval q{use HTML::Scrubber}; error($@) if $@; # Lists based on http://feedparser.org/docs/html-sanitization.html + # With html 5 video and audio tags added. $_scrubber = HTML::Scrubber->new( allow => [qw{ - a abbr acronym address area b big blockquote br + a abbr acronym address area b big blockquote br br/ button caption center cite code col colgroup dd del dfn dir div dl dt em fieldset font form h1 h2 h3 h4 - h5 h6 hr i img input ins kbd label legend li map - menu ol optgroup option p pre q s samp select small + h5 h6 hr hr/ i img input ins kbd label legend li map + menu ol optgroup option p p/ pre q s samp select small span strike strong sub sup table tbody td textarea tfoot th thead tr tt u ul var + video audio }], default => [undef, { ( map { $_ => 1 } qw{ - abbr accept accept-charset accesskey action + abbr accept accept-charset accesskey align alt axis border cellpadding cellspacing - char charoff charset checked cite class + char charoff charset checked class clear cols colspan color compact coords datetime dir disabled enctype for frame - headers height href hreflang hspace id ismap - label lang longdesc maxlength media method + headers height hreflang hspace id ismap + label lang maxlength media method multiple name nohref noshade nowrap prompt readonly rel rev rows rowspan rules scope - selected shape size span src start summary - tabindex target title type usemap valign + selected shape size span start summary + tabindex target title type valign value vspace width + autoplay loopstart loopend end + playcount controls } ), "/" => 1, # emit proper
XHTML - }], + href => $safe_url_regexp, + src => $safe_url_regexp, + action => $safe_url_regexp, + cite => $safe_url_regexp, + longdesc => $safe_url_regexp, + poster => $safe_url_regexp, + usemap => $safe_url_regexp, + }], ); return $_scrubber; } # }}}