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Code Issues Activity

Split sanitizer functions and fine-tune some tests (#31192) (#31200)

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Backport #31192 by wxiaoguang

Co-authored-by: wxiaoguang <wxiaoguang@gmail.com>
This commit is contained in:
Giteabot 2024-05-31 21:54:14 +08:00 committed by GitHub
parent 1987c86f3c
commit b6280f4d21
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
8 changed files with 270 additions and 245 deletions
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16
modules/markup/html_test.go
View File

@ -156,13 +156,18 @@ func TestRender_links(t *testing.T) {
assert.NoError(t, err)
assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(buffer))
}
// Text that should be turned into URL
defaultCustom := setting.Markdown.CustomURLSchemes
oldCustomURLSchemes := setting.Markdown.CustomURLSchemes
markup.ResetDefaultSanitizerForTesting()
defer func() {
setting.Markdown.CustomURLSchemes = oldCustomURLSchemes
markup.ResetDefaultSanitizerForTesting()
markup.CustomLinkURLSchemes(oldCustomURLSchemes)
}()
setting.Markdown.CustomURLSchemes = []string{"ftp", "magnet"}
markup.InitializeSanitizer()
markup.CustomLinkURLSchemes(setting.Markdown.CustomURLSchemes)
// Text that should be turned into URL
test(
"https://www.example.com",
`<p><a href="https://www.example.com" rel="nofollow">https://www.example.com</a></p>`)
@ -246,11 +251,6 @@ func TestRender_links(t *testing.T) {
test(
"ftps://gitea.com",
`<p>ftps://gitea.com</p>`)
// Restore previous settings
setting.Markdown.CustomURLSchemes = defaultCustom
markup.InitializeSanitizer()
markup.CustomLinkURLSchemes(setting.Markdown.CustomURLSchemes)
}
func TestRender_email(t *testing.T) {

1
modules/markup/renderer.go
View File

@ -46,7 +46,6 @@ func Init(ph *ProcessorHelper) {
DefaultProcessorHelper = *ph
}
NewSanitizer()
if len(setting.Markdown.CustomURLSchemes) > 0 {
CustomLinkURLSchemes(setting.Markdown.CustomURLSchemes)
}

222
modules/markup/sanitizer.go
View File

@ -5,13 +5,9 @@
package markup
import (
"io"
"net/url"
"regexp"
"sync"
"code.gitea.io/gitea/modules/setting"
"github.com/microcosm-cc/bluemonday"
)
@ -21,211 +17,35 @@ type Sanitizer struct {
defaultPolicy *bluemonday.Policy
descriptionPolicy *bluemonday.Policy
rendererPolicies map[string]*bluemonday.Policy
init sync.Once
allowAllRegex *regexp.Regexp
}
var (
sanitizer = &Sanitizer{}
allowAllRegex = regexp.MustCompile(".+")
defaultSanitizer *Sanitizer
defaultSanitizerOnce sync.Once
)
// NewSanitizer initializes sanitizer with allowed attributes based on settings.
// Multiple calls to this function will only create one instance of Sanitizer during
// entire application lifecycle.
func NewSanitizer() {
sanitizer.init.Do(func() {
InitializeSanitizer()
})
}
// InitializeSanitizer (re)initializes the current sanitizer to account for changes in settings
func InitializeSanitizer() {
sanitizer.rendererPolicies = map[string]*bluemonday.Policy{}
sanitizer.defaultPolicy = createDefaultPolicy()
sanitizer.descriptionPolicy = createRepoDescriptionPolicy()
for name, renderer := range renderers {
sanitizerRules := renderer.SanitizerRules()
if len(sanitizerRules) > 0 {
policy := createDefaultPolicy()
addSanitizerRules(policy, sanitizerRules)
sanitizer.rendererPolicies[name] = policy
func GetDefaultSanitizer() *Sanitizer {
defaultSanitizerOnce.Do(func() {
defaultSanitizer = &Sanitizer{
rendererPolicies: map[string]*bluemonday.Policy{},
allowAllRegex: regexp.MustCompile(".+"),
}
}
}
func createDefaultPolicy() *bluemonday.Policy {
policy := bluemonday.UGCPolicy()
// For JS code copy and Mermaid loading state
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^code-block( is-loading)?$`)).OnElements("pre")
// For code preview
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^code-preview-[-\w]+( file-content)?$`)).Globally()
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^lines-num$`)).OnElements("td")
policy.AllowAttrs("data-line-number").OnElements("span")
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^lines-code chroma$`)).OnElements("td")
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^code-inner$`)).OnElements("div")
// For code preview (unicode escape)
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^file-view( unicode-escaped)?$`)).OnElements("table")
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^lines-escape$`)).OnElements("td")
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^toggle-escape-button btn interact-bg$`)).OnElements("a") // don't use button, button might submit a form
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^(ambiguous-code-point|escaped-code-point|broken-code-point)$`)).OnElements("span")
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^char$`)).OnElements("span")
policy.AllowAttrs("data-tooltip-content", "data-escaped").OnElements("span")
// For color preview
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^color-preview$`)).OnElements("span")
// For attention
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^attention-header attention-\w+$`)).OnElements("blockquote")
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^attention-\w+$`)).OnElements("strong")
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^attention-icon attention-\w+ svg octicon-[\w-]+$`)).OnElements("svg")
policy.AllowAttrs("viewBox", "width", "height", "aria-hidden").OnElements("svg")
policy.AllowAttrs("fill-rule", "d").OnElements("path")
// For Chroma markdown plugin
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^(chroma )?language-[\w-]+( display)?( is-loading)?$`)).OnElements("code")
// Checkboxes
policy.AllowAttrs("type").Matching(regexp.MustCompile(`^checkbox$`)).OnElements("input")
policy.AllowAttrs("checked", "disabled", "data-source-position").OnElements("input")
// Custom URL-Schemes
if len(setting.Markdown.CustomURLSchemes) > 0 {
policy.AllowURLSchemes(setting.Markdown.CustomURLSchemes...)
} else {
policy.AllowURLSchemesMatching(allowAllRegex)
// Even if every scheme is allowed, these three are blocked for security reasons
disallowScheme := func(*url.URL) bool {
return false
}
policy.AllowURLSchemeWithCustomPolicy("javascript", disallowScheme)
policy.AllowURLSchemeWithCustomPolicy("vbscript", disallowScheme)
policy.AllowURLSchemeWithCustomPolicy("data", disallowScheme)
}
// Allow classes for anchors
policy.AllowAttrs("class").Matching(regexp.MustCompile(`ref-issue( ref-external-issue)?`)).OnElements("a")
// Allow classes for task lists
policy.AllowAttrs("class").Matching(regexp.MustCompile(`task-list-item`)).OnElements("li")
// Allow classes for org mode list item status.
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^(unchecked|checked|indeterminate)$`)).OnElements("li")
// Allow icons
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^icon(\s+[\p{L}\p{N}_-]+)+$`)).OnElements("i")
// Allow classes for emojis
policy.AllowAttrs("class").Matching(regexp.MustCompile(`emoji`)).OnElements("img")
// Allow icons, emojis, chroma syntax and keyword markup on span
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^((icon(\s+[\p{L}\p{N}_-]+)+)|(emoji)|(language-math display)|(language-math inline))$|^([a-z][a-z0-9]{0,2})$|^` + keywordClass + `$`)).OnElements("span")
// Allow 'color' and 'background-color' properties for the style attribute on text elements.
policy.AllowStyles("color", "background-color").OnElements("span", "p")
// Allow generally safe attributes
generalSafeAttrs := []string{
"abbr", "accept", "accept-charset",
"accesskey", "action", "align", "alt",
"aria-describedby", "aria-hidden", "aria-label", "aria-labelledby",
"axis", "border", "cellpadding", "cellspacing", "char",
"charoff", "charset", "checked",
"clear", "cols", "colspan", "color",
"compact", "coords", "datetime", "dir",
"disabled", "enctype", "for", "frame",
"headers", "height", "hreflang",
"hspace", "ismap", "label", "lang",
"maxlength", "media", "method",
"multiple", "name", "nohref", "noshade",
"nowrap", "open", "prompt", "readonly", "rel", "rev",
"rows", "rowspan", "rules", "scope",
"selected", "shape", "size", "span",
"start", "summary", "tabindex", "target",
"title", "type", "usemap", "valign", "value",
"vspace", "width", "itemprop",
}
generalSafeElements := []string{
"h1", "h2", "h3", "h4", "h5", "h6", "h7", "h8", "br", "b", "i", "strong", "em", "a", "pre", "code", "img", "tt",
"div", "ins", "del", "sup", "sub", "p", "ol", "ul", "table", "thead", "tbody", "tfoot", "blockquote", "label",
"dl", "dt", "dd", "kbd", "q", "samp", "var", "hr", "ruby", "rt", "rp", "li", "tr", "td", "th", "s", "strike", "summary",
"details", "caption", "figure", "figcaption",
"abbr", "bdo", "cite", "dfn", "mark", "small", "span", "time", "video", "wbr",
}
policy.AllowAttrs(generalSafeAttrs...).OnElements(generalSafeElements...)
policy.AllowAttrs("src", "autoplay", "controls").OnElements("video")
policy.AllowAttrs("itemscope", "itemtype").OnElements("div")
// FIXME: Need to handle longdesc in img but there is no easy way to do it
// Custom keyword markup
addSanitizerRules(policy, setting.ExternalSanitizerRules)
return policy
}
// createRepoDescriptionPolicy returns a minimal more strict policy that is used for
// repository descriptions.
func createRepoDescriptionPolicy() *bluemonday.Policy {
policy := bluemonday.NewPolicy()
// Allow italics and bold.
policy.AllowElements("i", "b", "em", "strong")
// Allow code.
policy.AllowElements("code")
// Allow links
policy.AllowAttrs("href", "target", "rel").OnElements("a")
// Allow classes for emojis
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^emoji$`)).OnElements("img", "span")
policy.AllowAttrs("aria-label").OnElements("span")
return policy
}
func addSanitizerRules(policy *bluemonday.Policy, rules []setting.MarkupSanitizerRule) {
for _, rule := range rules {
if rule.AllowDataURIImages {
policy.AllowDataURIImages()
}
if rule.Element != "" {
if rule.Regexp != nil {
policy.AllowAttrs(rule.AllowAttr).Matching(rule.Regexp).OnElements(rule.Element)
} else {
policy.AllowAttrs(rule.AllowAttr).OnElements(rule.Element)
for name, renderer := range renderers {
sanitizerRules := renderer.SanitizerRules()
if len(sanitizerRules) > 0 {
policy := defaultSanitizer.createDefaultPolicy()
defaultSanitizer.addSanitizerRules(policy, sanitizerRules)
defaultSanitizer.rendererPolicies[name] = policy
}
}
}
defaultSanitizer.defaultPolicy = defaultSanitizer.createDefaultPolicy()
defaultSanitizer.descriptionPolicy = defaultSanitizer.createRepoDescriptionPolicy()
})
return defaultSanitizer
}
// SanitizeDescription sanitizes the HTML generated for a repository description.
func SanitizeDescription(s string) string {
NewSanitizer()
return sanitizer.descriptionPolicy.Sanitize(s)
}
// Sanitize takes a string that contains a HTML fragment or document and applies policy whitelist.
func Sanitize(s string) string {
NewSanitizer()
return sanitizer.defaultPolicy.Sanitize(s)
}
// SanitizeReader sanitizes a Reader
func SanitizeReader(r io.Reader, renderer string, w io.Writer) error {
NewSanitizer()
policy, exist := sanitizer.rendererPolicies[renderer]
if !exist {
policy = sanitizer.defaultPolicy
}
return policy.SanitizeReaderToWriter(r, w)
func ResetDefaultSanitizerForTesting() {
defaultSanitizer = nil
defaultSanitizerOnce = sync.Once{}
}

25
modules/markup/sanitizer_custom.go Normal file
View File

@ -0,0 +1,25 @@
// Copyright 2024 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package markup
import (
"code.gitea.io/gitea/modules/setting"
"github.com/microcosm-cc/bluemonday"
)
func (st *Sanitizer) addSanitizerRules(policy *bluemonday.Policy, rules []setting.MarkupSanitizerRule) {
for _, rule := range rules {
if rule.AllowDataURIImages {
policy.AllowDataURIImages()
}
if rule.Element != "" {
if rule.Regexp != nil {
policy.AllowAttrs(rule.AllowAttr).Matching(rule.Regexp).OnElements(rule.Element)
} else {
policy.AllowAttrs(rule.AllowAttr).OnElements(rule.Element)
}
}
}
}

146
modules/markup/sanitizer_default.go Normal file
View File

@ -0,0 +1,146 @@
// Copyright 2024 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package markup
import (
"io"
"net/url"
"regexp"
"code.gitea.io/gitea/modules/setting"
"github.com/microcosm-cc/bluemonday"
)
func (st *Sanitizer) createDefaultPolicy() *bluemonday.Policy {
policy := bluemonday.UGCPolicy()
// For JS code copy and Mermaid loading state
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^code-block( is-loading)?$`)).OnElements("pre")
// For code preview
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^code-preview-[-\w]+( file-content)?$`)).Globally()
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^lines-num$`)).OnElements("td")
policy.AllowAttrs("data-line-number").OnElements("span")
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^lines-code chroma$`)).OnElements("td")
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^code-inner$`)).OnElements("div")
// For code preview (unicode escape)
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^file-view( unicode-escaped)?$`)).OnElements("table")
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^lines-escape$`)).OnElements("td")
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^toggle-escape-button btn interact-bg$`)).OnElements("a") // don't use button, button might submit a form
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^(ambiguous-code-point|escaped-code-point|broken-code-point)$`)).OnElements("span")
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^char$`)).OnElements("span")
policy.AllowAttrs("data-tooltip-content", "data-escaped").OnElements("span")
// For color preview
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^color-preview$`)).OnElements("span")
// For attention
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^attention-header attention-\w+$`)).OnElements("blockquote")
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^attention-\w+$`)).OnElements("strong")
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^attention-icon attention-\w+ svg octicon-[\w-]+$`)).OnElements("svg")
policy.AllowAttrs("viewBox", "width", "height", "aria-hidden").OnElements("svg")
policy.AllowAttrs("fill-rule", "d").OnElements("path")
// For Chroma markdown plugin
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^(chroma )?language-[\w-]+( display)?( is-loading)?$`)).OnElements("code")
// Checkboxes
policy.AllowAttrs("type").Matching(regexp.MustCompile(`^checkbox$`)).OnElements("input")
policy.AllowAttrs("checked", "disabled", "data-source-position").OnElements("input")
// Custom URL-Schemes
if len(setting.Markdown.CustomURLSchemes) > 0 {
policy.AllowURLSchemes(setting.Markdown.CustomURLSchemes...)
} else {
policy.AllowURLSchemesMatching(st.allowAllRegex)
// Even if every scheme is allowed, these three are blocked for security reasons
disallowScheme := func(*url.URL) bool {
return false
}
policy.AllowURLSchemeWithCustomPolicy("javascript", disallowScheme)
policy.AllowURLSchemeWithCustomPolicy("vbscript", disallowScheme)
policy.AllowURLSchemeWithCustomPolicy("data", disallowScheme)
}
// Allow classes for anchors
policy.AllowAttrs("class").Matching(regexp.MustCompile(`ref-issue( ref-external-issue)?`)).OnElements("a")
// Allow classes for task lists
policy.AllowAttrs("class").Matching(regexp.MustCompile(`task-list-item`)).OnElements("li")
// Allow classes for org mode list item status.
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^(unchecked|checked|indeterminate)$`)).OnElements("li")
// Allow icons
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^icon(\s+[\p{L}\p{N}_-]+)+$`)).OnElements("i")
// Allow classes for emojis
policy.AllowAttrs("class").Matching(regexp.MustCompile(`emoji`)).OnElements("img")
// Allow icons, emojis, chroma syntax and keyword markup on span
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^((icon(\s+[\p{L}\p{N}_-]+)+)|(emoji)|(language-math display)|(language-math inline))$|^([a-z][a-z0-9]{0,2})$|^` + keywordClass + `$`)).OnElements("span")
// Allow 'color' and 'background-color' properties for the style attribute on text elements.
policy.AllowStyles("color", "background-color").OnElements("span", "p")
// Allow generally safe attributes
generalSafeAttrs := []string{
"abbr", "accept", "accept-charset",
"accesskey", "action", "align", "alt",
"aria-describedby", "aria-hidden", "aria-label", "aria-labelledby",
"axis", "border", "cellpadding", "cellspacing", "char",
"charoff", "charset", "checked",
"clear", "cols", "colspan", "color",
"compact", "coords", "datetime", "dir",
"disabled", "enctype", "for", "frame",
"headers", "height", "hreflang",
"hspace", "ismap", "label", "lang",
"maxlength", "media", "method",
"multiple", "name", "nohref", "noshade",
"nowrap", "open", "prompt", "readonly", "rel", "rev",
"rows", "rowspan", "rules", "scope",
"selected", "shape", "size", "span",
"start", "summary", "tabindex", "target",
"title", "type", "usemap", "valign", "value",
"vspace", "width", "itemprop",
}
generalSafeElements := []string{
"h1", "h2", "h3", "h4", "h5", "h6", "h7", "h8", "br", "b", "i", "strong", "em", "a", "pre", "code", "img", "tt",
"div", "ins", "del", "sup", "sub", "p", "ol", "ul", "table", "thead", "tbody", "tfoot", "blockquote", "label",
"dl", "dt", "dd", "kbd", "q", "samp", "var", "hr", "ruby", "rt", "rp", "li", "tr", "td", "th", "s", "strike", "summary",
"details", "caption", "figure", "figcaption",
"abbr", "bdo", "cite", "dfn", "mark", "small", "span", "time", "video", "wbr",
}
policy.AllowAttrs(generalSafeAttrs...).OnElements(generalSafeElements...)
policy.AllowAttrs("src", "autoplay", "controls").OnElements("video")
policy.AllowAttrs("itemscope", "itemtype").OnElements("div")
// FIXME: Need to handle longdesc in img but there is no easy way to do it
// Custom keyword markup
defaultSanitizer.addSanitizerRules(policy, setting.ExternalSanitizerRules)
return policy
}
// Sanitize takes a string that contains a HTML fragment or document and applies policy whitelist.
func Sanitize(s string) string {
return GetDefaultSanitizer().defaultPolicy.Sanitize(s)
}
// SanitizeReader sanitizes a Reader
func SanitizeReader(r io.Reader, renderer string, w io.Writer) error {
policy, exist := GetDefaultSanitizer().rendererPolicies[renderer]
if !exist {
policy = GetDefaultSanitizer().defaultPolicy
}
return policy.SanitizeReaderToWriter(r, w)
}

37
modules/markup/sanitizer_test.go → modules/markup/sanitizer_default_test.go
View File

@ -5,18 +5,16 @@
package markup
import (
"html/template"
"strings"
"testing"
"github.com/stretchr/testify/assert"
)
func Test_Sanitizer(t *testing.T) {
NewSanitizer()
func TestSanitizer(t *testing.T) {
testCases := []string{
// Regular
`<a onblur="alert(secret)" href="http://www.google.com">Google</a>`, `<a href="http://www.google.com" rel="nofollow">Google</a>`,
"<scrİpt>&lt;script&gt;alert(document.domain)&lt;/script&gt;</scrİpt>", "&lt;script&gt;alert(document.domain)&lt;/script&gt;",
// Code highlighting class
`<code class="random string"></code>`, `<code></code>`,
@ -72,34 +70,3 @@ func Test_Sanitizer(t *testing.T) {
assert.Equal(t, testCases[i+1], Sanitize(testCases[i]))
}
}
func TestDescriptionSanitizer(t *testing.T) {
NewSanitizer()
testCases := []string{
`<h1>Title</h1>`, `Title`,
`<img src='img.png' alt='image'>`, ``,
`<span class="emoji" aria-label="thumbs up">THUMBS UP</span>`, `<span class="emoji" aria-label="thumbs up">THUMBS UP</span>`,
`<span style="color: red">Hello World</span>`, `<span>Hello World</span>`,
`<br>`, ``,
`<a href="https://example.com" target="_blank" rel="noopener noreferrer">https://example.com</a>`, `<a href="https://example.com" target="_blank" rel="noopener noreferrer">https://example.com</a>`,
`<mark>Important!</mark>`, `Important!`,
`<details>Click me! <summary>Nothing to see here.</summary></details>`, `Click me! Nothing to see here.`,
`<input type="hidden">`, ``,
`<b>I</b> have a <i>strong</i> <strong>opinion</strong> about <em>this</em>.`, `<b>I</b> have a <i>strong</i> <strong>opinion</strong> about <em>this</em>.`,
`Provides alternative <code>wg(8)</code> tool`, `Provides alternative <code>wg(8)</code> tool`,
}
for i := 0; i < len(testCases); i += 2 {
assert.Equal(t, testCases[i+1], SanitizeDescription(testCases[i]))
}
}
func TestSanitizeNonEscape(t *testing.T) {
descStr := "<scrİpt>&lt;script&gt;alert(document.domain)&lt;/script&gt;</scrİpt>"
output := template.HTML(Sanitize(descStr))
if strings.Contains(string(output), "<script>") {
t.Errorf("un-escaped <script> in output: %q", output)
}
}

37
modules/markup/sanitizer_description.go Normal file
View File

@ -0,0 +1,37 @@
// Copyright 2024 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package markup
import (
"regexp"
"github.com/microcosm-cc/bluemonday"
)
// createRepoDescriptionPolicy returns a minimal more strict policy that is used for
// repository descriptions.
func (st *Sanitizer) createRepoDescriptionPolicy() *bluemonday.Policy {
policy := bluemonday.NewPolicy()
policy.AllowStandardURLs()
// Allow italics and bold.
policy.AllowElements("i", "b", "em", "strong")
// Allow code.
policy.AllowElements("code")
// Allow links
policy.AllowAttrs("href", "target", "rel").OnElements("a")
// Allow classes for emojis
policy.AllowAttrs("class").Matching(regexp.MustCompile(`^emoji$`)).OnElements("img", "span")
policy.AllowAttrs("aria-label").OnElements("span")
return policy
}
// SanitizeDescription sanitizes the HTML generated for a repository description.
func SanitizeDescription(s string) string {
return GetDefaultSanitizer().descriptionPolicy.Sanitize(s)
}

31
modules/markup/sanitizer_description_test.go Normal file
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@ -0,0 +1,31 @@
// Copyright 2024 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package markup
import (
"testing"
"github.com/stretchr/testify/assert"
)
func TestDescriptionSanitizer(t *testing.T) {
testCases := []string{
`<h1>Title</h1>`, `Title`,
`<img src='img.png' alt='image'>`, ``,
`<span class="emoji" aria-label="thumbs up">THUMBS UP</span>`, `<span class="emoji" aria-label="thumbs up">THUMBS UP</span>`,
`<span style="color: red">Hello World</span>`, `<span>Hello World</span>`,
`<br>`, ``,
`<a href="https://example.com" target="_blank" rel="noopener noreferrer">https://example.com</a>`, `<a href="https://example.com" target="_blank" rel="noopener noreferrer nofollow">https://example.com</a>`,
`<a href="data:1234">data</a>`, `data`,
`<mark>Important!</mark>`, `Important!`,
`<details>Click me! <summary>Nothing to see here.</summary></details>`, `Click me! Nothing to see here.`,
`<input type="hidden">`, ``,
`<b>I</b> have a <i>strong</i> <strong>opinion</strong> about <em>this</em>.`, `<b>I</b> have a <i>strong</i> <strong>opinion</strong> about <em>this</em>.`,
`Provides alternative <code>wg(8)</code> tool`, `Provides alternative <code>wg(8)</code> tool`,
}
for i := 0; i < len(testCases); i += 2 {
assert.Equal(t, testCases[i+1], SanitizeDescription(testCases[i]))
}
}