Module: Loofah::HTML5::SafeList

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

Overview

HTML safelist lifted from HTML5lib sanitizer code:

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

<html5_license>

Copyright (c) 2006-2008 The Authors

Contributors:
James Graham - [email protected]
Anne van Kesteren - [email protected]
Lachlan Hunt - [email protected]
Matt McDonald - [email protected]
Sam Ruby - [email protected]
Ian Hickson (Google) - [email protected]
Thomas Broyer - [email protected]
Jacques Distler - [email protected]
Henri Sivonen - [email protected]
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([
  "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",
  "font",
  "footer",
  "form",
  "h1",
  "h2",
  "h3",
  "h4",
  "h5",
  "h6",
  "header",
  "hr",
  "i",
  "img",
  "input",
  "ins",
  "kbd",
  "label",
  "legend",
  "li",
  "main",
  "map",
  "mark",
  "menu",
  "meter",
  "nav",
  "ol",
  "optgroup",
  "option",
  "output",
  "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([
  "annotation",
  "annotation-xml",
  "maction",
  "math",
  "merror",
  "mfenced",
  "mfrac",
  "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([
  "a",
  "animate",
  "animateColor",
  "animateMotion",
  "animateTransform",
  "circle",
  "clipPath",
  "defs",
  "desc",
  "ellipse",
  "feGaussianBlur",
  "filter",
  "font-face",
  "font-face-name",
  "font-face-src",
  "foreignObject",
  "g",
  "glyph",
  "hkern",
  "line",
  "linearGradient",
  "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([
  "abbr",
  "accept",
  "accept-charset",
  "accesskey",
  "action",
  "align",
  "alt",
  "axis",
  "border",
  "cellpadding",
  "cellspacing",
  "char",
  "charoff",
  "charset",
  "checked",
  "cite",
  "class",
  "clear",
  "color",
  "cols",
  "colspan",
  "compact",
  "contenteditable",
  "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([
  "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([
  "accent-height",
  "accumulate",
  "additive",
  "alphabetic",
  "arabic-form",
  "ascent",
  "attributeName",
  "attributeType",
  "baseProfile",
  "bbox",
  "begin",
  "calcMode",
  "cap-height",
  "class",
  "clip-path",
  "clip-rule",
  "color",
  "color-interpolation-filters",
  "color-rendering",
  "content",
  "cx",
  "cy",
  "d",
  "descent",
  "display",
  "dur",
  "dx",
  "dy",
  "end",
  "fill",
  "fill-opacity",
  "fill-rule",
  "filterRes",
  "filterUnits",
  "font-family",
  "font-size",
  "font-stretch",
  "font-style",
  "font-variant",
  "font-weight",
  "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",
  "transform",
  "type",
  "u1",
  "u2",
  "underline-position",
  "underline-thickness",
  "unicode",
  "unicode-range",
  "units-per-em",
  "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([
  "action",
  "cite",
  "href",
  "longdesc",
  "poster",
  "preload",
  "src",
  "xlink:href",
  "xml:base",
])
SVG_ATTR_VAL_ALLOWS_REF =
Set.new([
  "clip-path",
  "color-profile",
  "cursor",
  "fill",
  "filter",
  "marker",
  "marker-end",
  "marker-mid",
  "marker-start",
  "mask",
  "stroke",
])
SVG_ALLOW_LOCAL_HREF =
Set.new([
  "altGlyph",
  "animate",
  "animateColor",
  "animateMotion",
  "animateTransform",
  "cursor",
  "feImage",
  "filter",
  "linearGradient",
  "pattern",
  "radialGradient",
  "set",
  "textpath",
  "tref",
  "use",
])
ACCEPTABLE_CSS_PROPERTIES =
Set.new([
  "azimuth",
  "align-content",
  "align-items",
  "align-self",
  "background-color",
  "border-bottom-color",
  "border-collapse",
  "border-color",
  "border-left-color",
  "border-right-color",
  "border-top-color",
  "clear",
  "color",
  "cursor",
  "direction",
  "display",
  "elevation",
  "flex",
  "flex-basis",
  "flex-direction",
  "flex-flow",
  "flex-grow",
  "flex-shrink",
  "flex-wrap",
  "float",
  "font",
  "font-family",
  "font-size",
  "font-style",
  "font-variant",
  "font-weight",
  "height",
  "justify-content",
  "letter-spacing",
  "line-height",
  "list-style",
  "list-style-type",
  "max-width",
  "order",
  "overflow",
  "overflow-x",
  "overflow-y",
  "page-break-after",
  "page-break-before",
  "page-break-inside",
  "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([
  "!important",
  "aqua",
  "auto",
  "black",
  "block",
  "blue",
  "bold",
  "both",
  "bottom",
  "brown",
  "center",
  "collapse",
  "dashed",
  "dotted",
  "double",
  "fuchsia",
  "gray",
  "green",
  "groove",
  "hidden",
  "inset",
  "italic",
  "left",
  "lime",
  "maroon",
  "medium",
  "navy",
  "none",
  "normal",
  "nowrap",
  "olive",
  "outset",
  "pointer",
  "purple",
  "red",
  "ridge",
  "right",
  "silver",
  "solid",
  "teal",
  "thin",
  "thick",
  "top",
  "transparent",
  "underline",
  "white",
  "yellow",
])
ACCEPTABLE_CSS_FUNCTIONS =

see www.quackit.com/css/functions/ omit `url` and `image` from that list

Set.new([
  "attr",
  "blur",
  "brightness",
  "calc",
  "circle",
  "contrast",
  "counter",
  "counters",
  "cubic-bezier",
  "drop-shadow",
  "ellipse",
  "grayscale",
  "hsl",
  "hsla",
  "hue-rotate",
  "hwb",
  "inset",
  "invert",
  "linear-gradient",
  "matrix",
  "matrix3d",
  "opacity",
  "perspective",
  "polygon",
  "radial-gradient",
  "repeating-linear-gradient",
  "repeating-radial-gradient",
  "rgb",
  "rgba",
  "rotate",
  "rotate3d",
  "rotateX",
  "rotateY",
  "rotateZ",
  "saturate",
  "sepia",
  "scale",
  "scale3d",
  "scaleX",
  "scaleY",
  "scaleZ",
  "skew",
  "skewX",
  "skewY",
  "symbols",
  "translate",
  "translate3d",
  "translateX",
  "translateY",
  "translateZ",
])
SHORTHAND_CSS_PROPERTIES =
Set.new([
  "background",
  "border",
  "margin",
  "padding",
])
ACCEPTABLE_SVG_PROPERTIES =
Set.new([
  "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([
  "afs",
  "aim",
  "callto",
  "data",
  "ed2k",
  "feed",
  "ftp",
  "gopher",
  "http",
  "https",
  "irc",
  "line",
  "mailto",
  "news",
  "nntp",
  "rsync",
  "rtsp",
  "sftp",
  "ssh",
  "tag",
  "tel",
  "telnet",
  "urn",
  "webcal",
  "xmpp",
])
ACCEPTABLE_URI_DATA_MEDIATYPES =
Set.new([
  "image/gif",
  "image/jpeg",
  "image/png",
  "image/svg+xml",
  "text/css",
  "text/plain",
])
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([
  "area",
  "base",
  "br",
  "col",
  "embed",
  "hr",
  "img",
  "input",
  "link",
  "meta",
  "param",
])
TAGS_SAFE_WITH_LIBXML2 =

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

Set.new([
  "body",
  "head",
  "html",
])
ALLOWED_ELEMENTS_WITH_LIBXML2 =
ALLOWED_ELEMENTS + TAGS_SAFE_WITH_LIBXML2