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Sandbox iframes when sanitizing. 

Updated iframe unit tests.

Refactored sanitizer.getExtraAttributes() to use `switch` instead of multiple `if` statements.
This commit is contained in:
dzaikos 2018-07-02 03:16:27 -04:00 committed by Frédéric Guillot
parent c3628813c6
commit 7d4a195519
2 changed files with 13 additions and 12 deletions
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13
reader/sanitizer/sanitizer.go
View File

@ -131,15 +131,16 @@ func sanitizeAttributes(baseURL, tagName string, attributes []html.Attribute) ([
}
func getExtraAttributes(tagName string) ([]string, []string) {
if tagName == "a" {
switch tagName {
case "a":
return []string{"rel", "target", "referrerpolicy"}, []string{`rel="noopener noreferrer"`, `target="_blank"`, `referrerpolicy="no-referrer"`}
}
if tagName == "video" || tagName == "audio" {
case "video", "audio":
return []string{"controls"}, []string{"controls"}
case "iframe":
return []string{"sandbox"}, []string{`sandbox="allow-scripts allow-same-origin"`}
default:
return nil, nil
}
return nil, nil
}
func isValidTag(tagName string) bool {

12
reader/sanitizer/sanitizer_test.go
View File

@ -165,7 +165,7 @@ func TestEspaceAttributes(t *testing.T) {
func TestReplaceYoutubeURL(t *testing.T) {
input := `<iframe src="http://www.youtube.com/embed/test123?version=3&#038;rel=1&#038;fs=1&#038;autohide=2&#038;showsearch=0&#038;showinfo=1&#038;iv_load_policy=1&#038;wmode=transparent"></iframe>`
expected := `<iframe src="https://www.youtube-nocookie.com/embed/test123?version=3&amp;rel=1&amp;fs=1&amp;autohide=2&amp;showsearch=0&amp;showinfo=1&amp;iv_load_policy=1&amp;wmode=transparent"></iframe>`
expected := `<iframe src="https://www.youtube-nocookie.com/embed/test123?version=3&amp;rel=1&amp;fs=1&amp;autohide=2&amp;showsearch=0&amp;showinfo=1&amp;iv_load_policy=1&amp;wmode=transparent" sandbox="allow-scripts allow-same-origin"></iframe>`
output := Sanitize("http://example.org/", input)
if expected != output {
@ -175,7 +175,7 @@ func TestReplaceYoutubeURL(t *testing.T) {
func TestReplaceSecureYoutubeURL(t *testing.T) {
input := `<iframe src="https://www.youtube.com/embed/test123"></iframe>`
expected := `<iframe src="https://www.youtube-nocookie.com/embed/test123"></iframe>`
expected := `<iframe src="https://www.youtube-nocookie.com/embed/test123" sandbox="allow-scripts allow-same-origin"></iframe>`
output := Sanitize("http://example.org/", input)
if expected != output {
@ -185,7 +185,7 @@ func TestReplaceSecureYoutubeURL(t *testing.T) {
func TestReplaceSecureYoutubeURLWithParameters(t *testing.T) {
input := `<iframe src="https://www.youtube.com/embed/test123?rel=0&amp;controls=0"></iframe>`
expected := `<iframe src="https://www.youtube-nocookie.com/embed/test123?rel=0&amp;controls=0"></iframe>`
expected := `<iframe src="https://www.youtube-nocookie.com/embed/test123?rel=0&amp;controls=0" sandbox="allow-scripts allow-same-origin"></iframe>`
output := Sanitize("http://example.org/", input)
if expected != output {
@ -194,8 +194,8 @@ func TestReplaceSecureYoutubeURLWithParameters(t *testing.T) {
}
func TestReplaceYoutubeURLAlreadyReplaced(t *testing.T) {
input := `<iframe src="https://www.youtube-nocookie.com/embed/test123?rel=0&amp;controls=0"></iframe>`
expected := `<iframe src="https://www.youtube-nocookie.com/embed/test123?rel=0&amp;controls=0"></iframe>`
input := `<iframe src="https://www.youtube-nocookie.com/embed/test123?rel=0&amp;controls=0" sandbox="allow-scripts allow-same-origin"></iframe>`
expected := `<iframe src="https://www.youtube-nocookie.com/embed/test123?rel=0&amp;controls=0" sandbox="allow-scripts allow-same-origin"></iframe>`
output := Sanitize("http://example.org/", input)
if expected != output {
@ -205,7 +205,7 @@ func TestReplaceYoutubeURLAlreadyReplaced(t *testing.T) {
func TestReplaceIframeURL(t *testing.T) {
input := `<iframe src="https://player.vimeo.com/video/123456?title=0&amp;byline=0"></iframe>`
expected := `<iframe src="https://player.vimeo.com/video/123456?title=0&amp;byline=0"></iframe>`
expected := `<iframe src="https://player.vimeo.com/video/123456?title=0&amp;byline=0" sandbox="allow-scripts allow-same-origin"></iframe>`
output := Sanitize("http://example.org/", input)
if expected != output {