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# Pleroma: A lightweight social networking server
# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
# SPDX-License-Identifier: AGPL-3.0-only
defmodule Pleroma.HTMLTest do
alias Pleroma.HTML
alias Pleroma.Object
alias Pleroma.Web.CommonAPI
use Pleroma.DataCase
import Pleroma.Factory
@html_sample """
<b>this is in bold</b>
<p>this is a paragraph</p>
this is a linebreak<br />
this is a link with allowed "rel" attribute: <a href="http://example.com/" rel="tag">example.com</a>
this is a link with not allowed "rel" attribute: <a href="http://example.com/" rel="tag noallowed">example.com</a>
this is an image: <img src="http://example.com/image.jpg"><br />
<script>alert('hacked')</script>
"""
@html_onerror_sample """
<img src="http://example.com/image.jpg" onerror="alert('hacked')">
"""
@html_span_class_sample """
<span class="animate-spin">hi</span>
"""
@html_span_microformats_sample """
<span class="h-card"><a class="u-url mention">@<span>foo</span></a></span>
"""
@html_span_invalid_microformats_sample """
<span class="h-card"><a class="u-url mention animate-spin">@<span>foo</span></a></span>
"""
describe "StripTags scrubber" do
test "works as expected" do
expected = """
this is in bold
this is a paragraph
this is a linebreak
this is a link with allowed "rel" attribute: example.com
this is a link with not allowed "rel" attribute: example.com
this is an image:
alert('hacked')
"""
assert expected == HTML.strip_tags(@html_sample)
end
test "does not allow attribute-based XSS" do
expected = "\n"
assert expected == HTML.strip_tags(@html_onerror_sample)
end
end
describe "TwitterText scrubber" do
test "normalizes HTML as expected" do
expected = """
this is in bold
<p>this is a paragraph</p>
this is a linebreak<br/>
this is a link with allowed "rel" attribute: <a href="http://example.com/" rel="tag">example.com</a>
this is a link with not allowed "rel" attribute: <a href="http://example.com/">example.com</a>
this is an image: <img src="http://example.com/image.jpg"/><br/>
alert('hacked')
"""
assert expected == HTML.filter_tags(@html_sample, Pleroma.HTML.Scrubber.TwitterText)
end
test "does not allow attribute-based XSS" do
expected = """
<img src="http://example.com/image.jpg"/>
"""
assert expected == HTML.filter_tags(@html_onerror_sample, Pleroma.HTML.Scrubber.TwitterText)
end
test "does not allow spans with invalid classes" do
expected = """
<span>hi</span>
"""
assert expected ==
HTML.filter_tags(@html_span_class_sample, Pleroma.HTML.Scrubber.TwitterText)
end
test "does allow microformats" do
expected = """
<span class="h-card"><a class="u-url mention">@<span>foo</span></a></span>
"""
assert expected ==
HTML.filter_tags(@html_span_microformats_sample, Pleroma.HTML.Scrubber.TwitterText)
end
test "filters invalid microformats markup" do
expected = """
<span class="h-card"><a>@<span>foo</span></a></span>
"""
assert expected ==
HTML.filter_tags(
@html_span_invalid_microformats_sample,
Pleroma.HTML.Scrubber.TwitterText
)
end
end
describe "default scrubber" do
test "normalizes HTML as expected" do
expected = """
<b>this is in bold</b>
<p>this is a paragraph</p>
this is a linebreak<br/>
this is a link with allowed "rel" attribute: <a href="http://example.com/" rel="tag">example.com</a>
this is a link with not allowed "rel" attribute: <a href="http://example.com/">example.com</a>
this is an image: <img src="http://example.com/image.jpg"/><br/>
alert('hacked')
"""
assert expected == HTML.filter_tags(@html_sample, Pleroma.HTML.Scrubber.Default)
end
test "does not allow attribute-based XSS" do
expected = """
<img src="http://example.com/image.jpg"/>
"""
assert expected == HTML.filter_tags(@html_onerror_sample, Pleroma.HTML.Scrubber.Default)
end
test "does not allow spans with invalid classes" do
expected = """
<span>hi</span>
"""
assert expected == HTML.filter_tags(@html_span_class_sample, Pleroma.HTML.Scrubber.Default)
end
test "does allow microformats" do
expected = """
<span class="h-card"><a class="u-url mention">@<span>foo</span></a></span>
"""
assert expected ==
HTML.filter_tags(@html_span_microformats_sample, Pleroma.HTML.Scrubber.Default)
end
test "filters invalid microformats markup" do
expected = """
<span class="h-card"><a>@<span>foo</span></a></span>
"""
assert expected ==
HTML.filter_tags(
@html_span_invalid_microformats_sample,
Pleroma.HTML.Scrubber.Default
)
end
end
describe "extract_first_external_url_from_object" do
test "extracts the url" do
user = insert(:user)
{:ok, activity} =
CommonAPI.post(user, %{
status:
"I think I just found the best github repo https://github.com/komeiji-satori/Dress"
})
object = Object.normalize(activity)
{:ok, url} = HTML.extract_first_external_url_from_object(object)
assert url == "https://github.com/komeiji-satori/Dress"
end
test "skips mentions" do
user = insert(:user)
other_user = insert(:user)
{:ok, activity} =
CommonAPI.post(user, %{
status:
"@#{other_user.nickname} install misskey! https://github.com/syuilo/misskey/blob/develop/docs/setup.en.md"
})
object = Object.normalize(activity)
{:ok, url} = HTML.extract_first_external_url_from_object(object)
assert url == "https://github.com/syuilo/misskey/blob/develop/docs/setup.en.md"
refute url == other_user.ap_id
end
test "skips hashtags" do
user = insert(:user)
{:ok, activity} =
CommonAPI.post(user, %{
status: "#cofe https://www.pixiv.net/member_illust.php?mode=medium&illust_id=72255140"
})
object = Object.normalize(activity)
{:ok, url} = HTML.extract_first_external_url_from_object(object)
assert url == "https://www.pixiv.net/member_illust.php?mode=medium&illust_id=72255140"
end
test "skips microformats hashtags" do
user = insert(:user)
{:ok, activity} =
CommonAPI.post(user, %{
status:
"<a href=\"https://pleroma.gov/tags/cofe\" rel=\"tag\">#cofe</a> https://www.pixiv.net/member_illust.php?mode=medium&illust_id=72255140",
content_type: "text/html"
})
object = Object.normalize(activity)
{:ok, url} = HTML.extract_first_external_url_from_object(object)
assert url == "https://www.pixiv.net/member_illust.php?mode=medium&illust_id=72255140"
end
test "does not crash when there is an HTML entity in a link" do
user = insert(:user)
{:ok, activity} = CommonAPI.post(user, %{status: "\"http://cofe.com/?boomer=ok&foo=bar\""})
object = Object.normalize(activity)
assert {:ok, nil} = HTML.extract_first_external_url_from_object(object)
end
test "skips attachment links" do
user = insert(:user)
{:ok, activity} =
CommonAPI.post(user, %{
status:
"<a href=\"https://pleroma.gov/media/d24caa3a498e21e0298377a9ca0149a4f4f8b767178aacf837542282e2d94fb1.png?name=image.png\" class=\"attachment\">image.png</a>"
})
object = Object.normalize(activity)
assert {:ok, nil} = HTML.extract_first_external_url_from_object(object)
end
end
end
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