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html.ex
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html.ex
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defmodule Pleroma.HTML do
alias HtmlSanitizeEx.Scrubber
@markup Application.get_env(:pleroma, :markup)
def filter_tags(html) do
scrubber = Keyword.get(@markup, :scrub_policy)
html |> Scrubber.scrub(scrubber)
end
def strip_tags(html) do
html |> Scrubber.scrub(Scrubber.StripTags)
end
end
defmodule Pleroma.HTML.Scrubber.TwitterText do
@moduledoc """
An HTML scrubbing policy which limits to twitter-style text. Only
paragraphs, breaks and links are allowed through the filter.
"""
require HtmlSanitizeEx.Scrubber.Meta
alias HtmlSanitizeEx.Scrubber.Meta
@valid_schemes ["http", "https"]
Meta.remove_cdata_sections_before_scrub()
Meta.strip_comments()
# links
Meta.allow_tag_with_uri_attributes("a", ["href"], @valid_schemes)
Meta.allow_tag_with_these_attributes("a", ["name", "title"])
# paragraphs and linebreaks
Meta.allow_tag_with_these_attributes("br", [])
Meta.allow_tag_with_these_attributes("p", [])
# microformats
Meta.allow_tag_with_these_attributes("span", [])
# allow inline images for custom emoji
@markup Application.get_env(:pleroma, :markup)
@allow_inline_images Keyword.get(@markup, :allow_inline_images)
if @allow_inline_images do
Meta.allow_tag_with_uri_attributes("img", ["src"], @valid_schemes)
Meta.allow_tag_with_these_attributes("img", [
"width",
"height",
"title",
"alt"
])
end
end
defmodule Pleroma.HTML.Scrubber.Default do
@doc "The default HTML scrubbing policy: no "
require HtmlSanitizeEx.Scrubber.Meta
alias HtmlSanitizeEx.Scrubber.Meta
@valid_schemes ["http", "https"]
Meta.remove_cdata_sections_before_scrub()
Meta.strip_comments()
Meta.allow_tag_with_uri_attributes("a", ["href"], @valid_schemes)
Meta.allow_tag_with_these_attributes("a", ["name", "title"])
Meta.allow_tag_with_these_attributes("b", [])
Meta.allow_tag_with_these_attributes("blockquote", [])
Meta.allow_tag_with_these_attributes("br", [])
Meta.allow_tag_with_these_attributes("code", [])
Meta.allow_tag_with_these_attributes("del", [])
Meta.allow_tag_with_these_attributes("em", [])
Meta.allow_tag_with_these_attributes("i", [])
Meta.allow_tag_with_these_attributes("li", [])
Meta.allow_tag_with_these_attributes("ol", [])
Meta.allow_tag_with_these_attributes("p", [])
Meta.allow_tag_with_these_attributes("pre", [])
Meta.allow_tag_with_these_attributes("span", [])
Meta.allow_tag_with_these_attributes("strong", [])
Meta.allow_tag_with_these_attributes("u", [])
Meta.allow_tag_with_these_attributes("ul", [])
@markup Application.get_env(:pleroma, :markup)
@allow_inline_images Keyword.get(@markup, :allow_inline_images)
if @allow_inline_images do
Meta.allow_tag_with_uri_attributes("img", ["src"], @valid_schemes)
Meta.allow_tag_with_these_attributes("img", [
"width",
"height",
"title",
"alt"
])
end
@allow_tables Keyword.get(@markup, :allow_tables)
if @allow_tables do
Meta.allow_tag_with_these_attributes("table", [])
Meta.allow_tag_with_these_attributes("tbody", [])
Meta.allow_tag_with_these_attributes("td", [])
Meta.allow_tag_with_these_attributes("th", [])
Meta.allow_tag_with_these_attributes("thead", [])
Meta.allow_tag_with_these_attributes("tr", [])
end
@allow_headings Keyword.get(@markup, :allow_headings)
if @allow_headings do
Meta.allow_tag_with_these_attributes("h1", [])
Meta.allow_tag_with_these_attributes("h2", [])
Meta.allow_tag_with_these_attributes("h3", [])
Meta.allow_tag_with_these_attributes("h4", [])
Meta.allow_tag_with_these_attributes("h5", [])
end
@allow_fonts Keyword.get(@markup, :allow_fonts)
if @allow_fonts do
Meta.allow_tag_with_these_attributes("font", ["face"])
end
Meta.strip_everything_not_covered()
end

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