# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.HTML do
- alias HtmlSanitizeEx.Scrubber
-
defp get_scrubbers(scrubber) when is_atom(scrubber), do: [scrubber]
defp get_scrubbers(scrubbers) when is_list(scrubbers), do: scrubbers
defp get_scrubbers(_), do: [Pleroma.HTML.Scrubber.Default]
end)
end
- def filter_tags(html, scrubber), do: Scrubber.scrub(html, scrubber)
+ def filter_tags(html, scrubber) do
+ {:ok, content} = FastSanitize.Sanitizer.scrub(html, scrubber)
+ content
+ end
+
def filter_tags(html), do: filter_tags(html, nil)
- def strip_tags(html), do: Scrubber.scrub(html, Scrubber.StripTags)
+ def strip_tags(html), do: filter_tags(html, FastSanitize.Sanitizer.StripTags)
- def get_cached_scrubbed_html_for_activity(content, scrubbers, activity, key \\ "") do
+ def get_cached_scrubbed_html_for_activity(
+ content,
+ scrubbers,
+ activity,
+ key \\ "",
+ callback \\ fn x -> x end
+ ) do
key = "#{key}#{generate_scrubber_signature(scrubbers)}|#{activity.id}"
Cachex.fetch!(:scrubber_cache, key, fn _key ->
- ensure_scrubbed_html(content, scrubbers, activity.data["object"]["fake"] || false)
+ object = Pleroma.Object.normalize(activity)
+ ensure_scrubbed_html(content, scrubbers, object.data["fake"] || false, callback)
end)
end
def get_cached_stripped_html_for_activity(content, activity, key) do
get_cached_scrubbed_html_for_activity(
content,
- HtmlSanitizeEx.Scrubber.StripTags,
+ FastSanitize.Sanitizer.StripTags,
activity,
- key
+ key,
+ &HtmlEntities.decode/1
)
end
def ensure_scrubbed_html(
content,
scrubbers,
- false = _fake
- ) do
- {:commit, filter_tags(content, scrubbers)}
- end
-
- def ensure_scrubbed_html(
- content,
- scrubbers,
- true = _fake
+ fake,
+ callback
) do
- {:ignore, filter_tags(content, scrubbers)}
+ content =
+ content
+ |> filter_tags(scrubbers)
+ |> callback.()
+
+ if fake do
+ {:ignore, content}
+ else
+ {:commit, content}
+ end
end
defp generate_scrubber_signature(scrubber) when is_atom(scrubber) do
Cachex.fetch!(:scrubber_cache, key, fn _key ->
result =
content
- |> Floki.filter_out("a.mention")
+ |> Floki.filter_out("a.mention,a.hashtag,a[rel~=\"tag\"]")
|> Floki.attribute("a", "href")
|> Enum.at(0)
paragraphs, breaks and links are allowed through the filter.
"""
- @markup Application.get_env(:pleroma, :markup)
@valid_schemes Pleroma.Config.get([:uri_schemes, :valid_schemes], [])
- require HtmlSanitizeEx.Scrubber.Meta
- alias HtmlSanitizeEx.Scrubber.Meta
+ require FastSanitize.Sanitizer.Meta
+ alias FastSanitize.Sanitizer.Meta
- Meta.remove_cdata_sections_before_scrub()
Meta.strip_comments()
# links
- Meta.allow_tag_with_uri_attributes("a", ["href", "data-user", "data-tag"], @valid_schemes)
- Meta.allow_tag_with_these_attributes("a", ["name", "title", "class"])
+ Meta.allow_tag_with_uri_attributes(:a, ["href", "data-user", "data-tag"], @valid_schemes)
+
+ Meta.allow_tag_with_this_attribute_values(:a, "class", [
+ "hashtag",
+ "u-url",
+ "mention",
+ "u-url mention",
+ "mention u-url"
+ ])
- Meta.allow_tag_with_this_attribute_values("a", "rel", [
+ Meta.allow_tag_with_this_attribute_values(:a, "rel", [
"tag",
"nofollow",
"noopener",
"noreferrer"
])
+ 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", [])
+ Meta.allow_tag_with_these_attributes(:br, [])
+ Meta.allow_tag_with_these_attributes(:p, [])
# microformats
- Meta.allow_tag_with_these_attributes("span", ["class"])
+ Meta.allow_tag_with_this_attribute_values(:span, "class", ["h-card"])
+ Meta.allow_tag_with_these_attributes(:span, [])
# allow inline images for custom emoji
- @allow_inline_images Keyword.get(@markup, :allow_inline_images)
-
- if @allow_inline_images do
+ if Pleroma.Config.get([:markup, :allow_inline_images]) do
# restrict img tags to http/https only, because of MediaProxy.
- Meta.allow_tag_with_uri_attributes("img", ["src"], ["http", "https"])
+ Meta.allow_tag_with_uri_attributes(:img, ["src"], ["http", "https"])
- Meta.allow_tag_with_these_attributes("img", [
+ Meta.allow_tag_with_these_attributes(:img, [
"width",
"height",
+ "class",
"title",
"alt"
])
defmodule Pleroma.HTML.Scrubber.Default do
@doc "The default HTML scrubbing policy: no "
- require HtmlSanitizeEx.Scrubber.Meta
- alias HtmlSanitizeEx.Scrubber.Meta
+ require FastSanitize.Sanitizer.Meta
+ alias FastSanitize.Sanitizer.Meta
# credo:disable-for-previous-line
# No idea how to fix this one…
- @markup Application.get_env(:pleroma, :markup)
@valid_schemes Pleroma.Config.get([:uri_schemes, :valid_schemes], [])
- Meta.remove_cdata_sections_before_scrub()
Meta.strip_comments()
- Meta.allow_tag_with_uri_attributes("a", ["href", "data-user", "data-tag"], @valid_schemes)
- Meta.allow_tag_with_these_attributes("a", ["name", "title", "class"])
+ Meta.allow_tag_with_uri_attributes(:a, ["href", "data-user", "data-tag"], @valid_schemes)
- Meta.allow_tag_with_this_attribute_values("a", "rel", [
+ Meta.allow_tag_with_this_attribute_values(:a, "class", [
+ "hashtag",
+ "u-url",
+ "mention",
+ "u-url mention",
+ "mention u-url"
+ ])
+
+ Meta.allow_tag_with_this_attribute_values(:a, "rel", [
"tag",
"nofollow",
"noopener",
- "noreferrer"
+ "noreferrer",
+ "ugc"
])
- Meta.allow_tag_with_these_attributes("abbr", ["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", ["class"])
- Meta.allow_tag_with_these_attributes("strong", [])
- Meta.allow_tag_with_these_attributes("u", [])
- Meta.allow_tag_with_these_attributes("ul", [])
-
- @allow_inline_images Keyword.get(@markup, :allow_inline_images)
+ Meta.allow_tag_with_these_attributes(:a, ["name", "title"])
+
+ Meta.allow_tag_with_these_attributes(:abbr, ["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(:strong, [])
+ Meta.allow_tag_with_these_attributes(:sub, [])
+ Meta.allow_tag_with_these_attributes(:sup, [])
+ Meta.allow_tag_with_these_attributes(:u, [])
+ Meta.allow_tag_with_these_attributes(:ul, [])
+
+ Meta.allow_tag_with_this_attribute_values(:span, "class", ["h-card"])
+ Meta.allow_tag_with_these_attributes(:span, [])
+
+ @allow_inline_images Pleroma.Config.get([:markup, :allow_inline_images])
if @allow_inline_images do
# restrict img tags to http/https only, because of MediaProxy.
- Meta.allow_tag_with_uri_attributes("img", ["src"], ["http", "https"])
+ Meta.allow_tag_with_uri_attributes(:img, ["src"], ["http", "https"])
- Meta.allow_tag_with_these_attributes("img", [
+ Meta.allow_tag_with_these_attributes(:img, [
"width",
"height",
+ "class",
"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", [])
+ if Pleroma.Config.get([:markup, :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", [])
+ if Pleroma.Config.get([:markup, :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"])
+ if Pleroma.Config.get([:markup, :allow_fonts]) do
+ Meta.allow_tag_with_these_attributes(:font, ["face"])
end
Meta.strip_everything_not_covered()
def before_scrub(html), do: html
- def scrub_attribute("img", {"src", "http" <> target}) do
+ def scrub_attribute(:img, {"src", "http" <> target}) do
media_url =
("http" <> target)
|> MediaProxy.url()
def scrub_attribute(_tag, attribute), do: attribute
- def scrub({"img", attributes, children}) do
+ def scrub({:img, attributes, children}) do
attributes =
attributes
- |> Enum.map(fn attr -> scrub_attribute("img", attr) end)
+ |> Enum.map(fn attr -> scrub_attribute(:img, attr) end)
|> Enum.reject(&is_nil(&1))
- {"img", attributes, children}
+ {:img, attributes, children}
end
- def scrub({:comment, _children}), do: ""
+ def scrub({:comment, _text, _children}), do: ""
def scrub({tag, attributes, children}), do: {tag, attributes, children}
def scrub({_tag, children}), do: children
def scrub(text), do: text
end
+
+defmodule Pleroma.HTML.Scrubber.LinksOnly do
+ @moduledoc """
+ An HTML scrubbing policy which limits to links only.
+ """
+
+ @valid_schemes Pleroma.Config.get([:uri_schemes, :valid_schemes], [])
+
+ require FastSanitize.Sanitizer.Meta
+ alias FastSanitize.Sanitizer.Meta
+
+ Meta.strip_comments()
+
+ # links
+ Meta.allow_tag_with_uri_attributes(:a, ["href"], @valid_schemes)
+
+ Meta.allow_tag_with_this_attribute_values(:a, "rel", [
+ "tag",
+ "nofollow",
+ "noopener",
+ "noreferrer",
+ "me",
+ "ugc"
+ ])
+
+ Meta.allow_tag_with_these_attributes(:a, ["name", "title"])
+ Meta.strip_everything_not_covered()
+end
projects / akkoma / blobdiff