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Restore checkbox rendering and prevent poor sanitization of spans (#11277)

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* Add test

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Restore checkbox rendering and prevent poor sanitization of spans

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Also fix preview context

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Also fix preview context

Signed-off-by: Andrew Thornton <art27@cantab.net>
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zeripath 2020-05-03 21:17:24 +01:00 committed by GitHub
parent 940ed92392
commit ce66ca7f9f
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GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 21 additions and 3 deletions
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12
modules/markup/markdown/markdown_test.go
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@ -140,6 +140,12 @@ func testAnswers(baseURLContent, baseURLImages string) []string {
</ol>
<h2 id="user-content-custom-id">More tests</h2>
<p>(from <a href="https://www.markdownguide.org/extended-syntax/" rel="nofollow">https://www.markdownguide.org/extended-syntax/</a>)</p>
<h3 id="user-content-checkboxes">Checkboxes</h3>
<ul class="task-list">
<li><span class="ui checkbox"><input type="checkbox" readonly="readonly"/><label>unchecked</label></span></li>
<li><span class="ui checked checkbox"><input type="checkbox" checked="" readonly="readonly"/><label>checked</label></span></li>
<li><span class="ui checkbox"><input type="checkbox" readonly="readonly"/><label>still unchecked</label></span></li>
</ul>
<h3 id="user-content-definition-list">Definition list</h3>
<dl>
<dt>First Term</dt>
@ -207,6 +213,12 @@ Here are some links to the most important topics. You can find the full list of
(from https://www.markdownguide.org/extended-syntax/)
### Checkboxes
- [ ] unchecked
- [x] checked
- [ ] still unchecked
### Definition list
First Term

5
modules/markup/sanitizer.go
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@ -58,15 +58,16 @@ func ReplaceSanitizer() {
// Allow icons
sanitizer.policy.AllowAttrs("class").Matching(regexp.MustCompile(`^icon(\s+[\p{L}\p{N}_-]+)+$`)).OnElements("i")
sanitizer.policy.AllowAttrs("class").Matching(regexp.MustCompile(`^((icon(\s+[\p{L}\p{N}_-]+)+)|(ui checkbox)|(ui checked checkbox))$`)).OnElements("span")
// Allow unlabelled labels
sanitizer.policy.AllowNoAttrs().OnElements("label")
// Allow classes for emojis
sanitizer.policy.AllowAttrs("class").Matching(regexp.MustCompile(`emoji`)).OnElements("span")
sanitizer.policy.AllowAttrs("class").Matching(regexp.MustCompile(`emoji`)).OnElements("img")
// Allow icons, checkboxes and emojis on span
sanitizer.policy.AllowAttrs("class").Matching(regexp.MustCompile(`^((icon(\s+[\p{L}\p{N}_-]+)+)|(ui checkbox)|(ui checked checkbox)|(emoji))$`)).OnElements("span")
// Allow generally safe attributes
generalSafeAttrs := []string{"abbr", "accept", "accept-charset",
"accesskey", "action", "align", "alt",

5
modules/markup/sanitizer_test.go
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@ -38,6 +38,11 @@ func Test_Sanitizer(t *testing.T) {
// <kbd> tags
`<kbd>Ctrl + C</kbd>`, `<kbd>Ctrl + C</kbd>`,
`<i class="dropdown icon">NAUGHTY</i>`, `<i>NAUGHTY</i>`,
`<i class="icon dropdown"></i>`, `<i class="icon dropdown"></i>`,
`<span class="ui checkbox"><input type="checkbox" readonly="readonly"/><label>unchecked</label></span>`, `<span class="ui checkbox"><input type="checkbox" readonly="readonly"/><label>unchecked</label></span>`,
`<span class="emoji dropdown">NAUGHTY</span>`, `<span>NAUGHTY</span>`,
`<span class="emoji">contents</span>`, `<span class="emoji">contents</span>`,
}
for i := 0; i < len(testCases); i += 2 {

2
web_src/js/index.js
View File

@ -65,7 +65,7 @@ function initEditPreviewTab($form) {
previewFileModes = $previewTab.data('preview-file-modes').split(',');
$previewTab.on('click', function () {
const $this = $(this);
let context = `{$this.data('context')}/`;
let context = `${$this.data('context')}/`;
const treePathEl = $form.find('input#tree_path');
if (treePathEl.length > 0) {
context += treePathEl.val();