Module: Loofah::HTML5::WhiteList

Defined in:
lib/loofah/html5/whitelist.rb

Overview

HTML whitelist lifted from HTML5lib sanitizer code:

http://code.google.com/p/html5lib/

<html5_license>

Copyright (c) 2006-2008 The Authors

Contributors:
James Graham - jg307@cam.ac.uk
Anne van Kesteren - annevankesteren@gmail.com
Lachlan Hunt - lachlan.hunt@lachy.id.au
Matt McDonald - kanashii@kanashii.ca
Sam Ruby - rubys@intertwingly.net
Ian Hickson (Google) - ian@hixie.ch
Thomas Broyer - t.broyer@ltgt.net
Jacques Distler - distler@golem.ph.utexas.edu
Henri Sivonen - hsivonen@iki.fi
The Mozilla Foundation (contributions from Henri Sivonen since 2008)

Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documentation
files (the "Software"), to deal in the Software without
restriction, including without limitation the rights to use, copy,
modify, merge, publish, distribute, sublicense, and/or sell copies
of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be
included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.

</html5_license>

Constant Summary collapse

ACCEPTABLE_ELEMENTS =
Set.new %w[a abbr acronym address area
article aside audio b bdi bdo big blockquote br button canvas
caption center cite code col colgroup command datalist dd del
details dfn dir div dl dt em fieldset figcaption figure footer
font form h1 h2 h3 h4 h5 h6 header hr i img input ins kbd label
legend li main map mark menu meter nav ol output optgroup option p
pre q s samp section select small span strike strong sub summary
sup table tbody td textarea tfoot th thead time tr tt u ul var
video]
MATHML_ELEMENTS =
Set.new %w[annotation annotation-xml maction math merror mfrac
mfenced mi mmultiscripts mn mo mover mpadded mphantom mprescripts mroot mrow
mspace msqrt mstyle msub msubsup msup mtable mtd mtext mtr munder
munderover none semantics]
SVG_ELEMENTS =
Set.new %w[a animate animateColor animateMotion animateTransform
circle clipPath defs desc ellipse feGaussianBlur filter font-face
font-face-name font-face-src foreignObject
g glyph hkern linearGradient line marker mask metadata missing-glyph
mpath path polygon polyline radialGradient rect set stop svg switch symbol
text textPath title tspan use]
ACCEPTABLE_ATTRIBUTES =
Set.new %w[abbr accept accept-charset accesskey action
align alt axis border cellpadding cellspacing char charoff charset
checked cite class clear cols colspan color compact coords datetime
dir disabled enctype for frame headers height href hreflang hspace id
ismap label lang longdesc loop loopcount loopend loopstart
maxlength media method multiple name nohref
noshade nowrap poster preload prompt readonly rel rev rows rowspan rules scope
selected shape size span src start style summary tabindex target title
type usemap valign value vspace width xml:lang]
MATHML_ATTRIBUTES =
Set.new %w[actiontype align close
columnalign columnlines columnspacing columnspan depth display
displaystyle encoding equalcolumns equalrows fence fontstyle fontweight
frame height linethickness lspace mathbackground mathcolor mathvariant
maxsize minsize open other rowalign rowlines
rowspacing rowspan rspace scriptlevel selection separator separators
stretchy width xlink:href xlink:show xlink:type xmlns xmlns:xlink]
SVG_ATTRIBUTES =
Set.new %w[accent-height accumulate additive alphabetic
arabic-form ascent attributeName attributeType baseProfile bbox begin
by calcMode cap-height class clip-path clip-rule color
color-interpolation-filters color-rendering content cx cy d dx
dy descent display dur end fill fill-opacity fill-rule
filterRes filterUnits font-family
font-size font-stretch font-style font-variant font-weight from fx fy g1
g2 glyph-name gradientUnits hanging height horiz-adv-x horiz-origin-x id
ideographic k keyPoints keySplines keyTimes lang marker-end
marker-mid marker-start markerHeight markerUnits markerWidth
maskContentUnits maskUnits mathematical max method min name offset opacity orient origin
overline-position overline-thickness panose-1 path pathLength
patternContentUnits patternTransform patternUnits  points
preserveAspectRatio primitiveUnits r refX refY repeatCount repeatDur
requiredExtensions requiredFeatures restart rotate rx ry slope spacing
startOffset stdDeviation stemh
stemv stop-color stop-opacity strikethrough-position
strikethrough-thickness stroke stroke-dasharray stroke-dashoffset
stroke-linecap stroke-linejoin stroke-miterlimit stroke-opacity
stroke-width systemLanguage target text-anchor to transform type u1
u2 underline-position underline-thickness unicode unicode-range
units-per-em values version viewBox visibility width widths x
x-height x1 x2 xlink:actuate xlink:arcrole xlink:href xlink:role
xlink:show xlink:title xlink:type xml:base xml:lang xml:space xmlns
xmlns:xlink y y1 y2 zoomAndPan]
ATTR_VAL_IS_URI =
Set.new %w[href src cite action longdesc xlink:href xml:base poster preload]
SVG_ATTR_VAL_ALLOWS_REF =
Set.new %w[clip-path color-profile cursor fill
filter marker marker-start marker-mid marker-end mask stroke]
SVG_ALLOW_LOCAL_HREF =
Set.new %w[altGlyph animate animateColor animateMotion
animateTransform cursor feImage filter linearGradient pattern
radialGradient textpath tref set use]
ACCEPTABLE_CSS_PROPERTIES =
Set.new %w[azimuth background-color
border-bottom-color border-collapse border-color border-left-color
border-right-color border-top-color clear color cursor direction
display elevation float font font-family font-size font-style
font-variant font-weight height letter-spacing line-height list-style-type
overflow pause pause-after pause-before pitch pitch-range richness speak
speak-header speak-numeral speak-punctuation speech-rate stress
text-align text-decoration text-indent unicode-bidi vertical-align
voice-family volume white-space width]
ACCEPTABLE_CSS_KEYWORDS =
Set.new %w[auto aqua black block blue bold both bottom
brown center collapse dashed dotted fuchsia gray green !important
italic left lime maroon medium none navy normal nowrap olive pointer
purple red right solid silver teal top transparent underline white
yellow]
ACCEPTABLE_CSS_FUNCTIONS =
Set.new %w[calc rgb]
SHORTHAND_CSS_PROPERTIES =
Set.new %w[background border margin padding]
ACCEPTABLE_SVG_PROPERTIES =
Set.new %w[fill fill-opacity fill-rule stroke
stroke-width stroke-linecap stroke-linejoin stroke-opacity]
PROTOCOL_SEPARATOR =
/:|(&#0*58)|(&#x70)|(&#x0*3a)|(%|&#37;)3A/i
ACCEPTABLE_PROTOCOLS =
Set.new %w[ed2k ftp http https irc mailto news gopher nntp
telnet webcal xmpp callto feed urn aim rsync tag ssh sftp rtsp afs data]
ACCEPTABLE_URI_DATA_MEDIATYPES =
Set.new %w[text/plain text/css image/png image/gif
image/jpeg image/svg+xml]
ALLOWED_ELEMENTS =

subclasses may define their own versions of these constants

ACCEPTABLE_ELEMENTS + MATHML_ELEMENTS + SVG_ELEMENTS
ALLOWED_ATTRIBUTES =
ACCEPTABLE_ATTRIBUTES + MATHML_ATTRIBUTES + SVG_ATTRIBUTES
ALLOWED_CSS_PROPERTIES =
ACCEPTABLE_CSS_PROPERTIES
ALLOWED_CSS_KEYWORDS =
ACCEPTABLE_CSS_KEYWORDS
ALLOWED_CSS_FUNCTIONS =
ACCEPTABLE_CSS_FUNCTIONS
ALLOWED_SVG_PROPERTIES =
ACCEPTABLE_SVG_PROPERTIES
ALLOWED_PROTOCOLS =
ACCEPTABLE_PROTOCOLS
ALLOWED_URI_DATA_MEDIATYPES =
ACCEPTABLE_URI_DATA_MEDIATYPES
VOID_ELEMENTS =
Set.new %w[
  base
  link
  meta
  hr
  br
  img
  embed
  param
  area
  col
  input
]
TAGS_SAFE_WITH_LIBXML2 =

additional tags we should consider safe since we have libxml2 fixing up our documents.

Set.new %w[html head body]
ALLOWED_ELEMENTS_WITH_LIBXML2 =
ALLOWED_ELEMENTS + TAGS_SAFE_WITH_LIBXML2