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-rw-r--r--docs/content/en/readfiles/bfconfig.md5
-rw-r--r--helpers/content.go6
-rw-r--r--helpers/content_test.go2
3 files changed, 13 insertions, 0 deletions
diff --git a/docs/content/en/readfiles/bfconfig.md b/docs/content/en/readfiles/bfconfig.md
index a7e74566a..936aef52d 100644
--- a/docs/content/en/readfiles/bfconfig.md
+++ b/docs/content/en/readfiles/bfconfig.md
@@ -48,6 +48,11 @@
Blackfriday flag: **`HTML_NOFOLLOW_LINKS`** <br>
Purpose: `true` creates <s>external links</s> **absolute** links with `nofollow` being added to their `rel` attribute. Thereby crawlers are advised to not follow the link. While the `rel="nofollow"` attribute is typically used for external links, Blackfriday does that for _all_ absolute links. One needs to make note of this if they use absolute links throughout, for internal links too (for example, by setting `canonifyURLs` to `true` or via `absURL`).
+`noreferrerLinks`
+: default: **`false`** <br>
+ Blackfriday flag: **`HTML_NOREFERRER_LINKS`** <br>
+ Purpose: `true` creates <s>external links</s> **absolute** links with `noreferrer` being added to their `rel` attribute. Thus when following the link no referrer information will be leaked. While the `rel="noreferrer"` attribute is typically used for external links, Blackfriday does that for _all_ absolute links. One needs to make note of this if they use absolute links throughout, for internal links too (for example, by setting `canonifyURLs` to `true` or via `absURL`).
+
`plainIDAnchors`
: default **`true`** <br>
Blackfriday flag: **`FootnoteAnchorPrefix` and `HeaderIDSuffix`** <br>
diff --git a/helpers/content.go b/helpers/content.go
index 4a46ecb77..1c0a7b7e9 100644
--- a/helpers/content.go
+++ b/helpers/content.go
@@ -109,6 +109,7 @@ type BlackFriday struct {
Fractions bool
HrefTargetBlank bool
NofollowLinks bool
+ NoreferrerLinks bool
SmartDashes bool
LatexDashes bool
TaskLists bool
@@ -126,6 +127,7 @@ func newBlackfriday(config map[string]interface{}) *BlackFriday {
"fractions": true,
"hrefTargetBlank": false,
"nofollowLinks": false,
+ "noreferrerLinks": false,
"smartDashes": true,
"latexDashes": true,
"plainIDAnchors": true,
@@ -283,6 +285,10 @@ func (c *ContentSpec) getHTMLRenderer(defaultFlags int, ctx *RenderingContext) b
htmlFlags |= blackfriday.HTML_NOFOLLOW_LINKS
}
+ if ctx.Config.NoreferrerLinks {
+ htmlFlags |= blackfriday.HTML_NOREFERRER_LINKS
+ }
+
if ctx.Config.SmartDashes {
htmlFlags |= blackfriday.HTML_SMARTYPANTS_DASHES
}
diff --git a/helpers/content_test.go b/helpers/content_test.go
index fe670bd74..5297df2de 100644
--- a/helpers/content_test.go
+++ b/helpers/content_test.go
@@ -205,6 +205,7 @@ func TestGetHTMLRendererAllFlags(t *testing.T) {
{blackfriday.HTML_SMARTYPANTS_FRACTIONS},
{blackfriday.HTML_HREF_TARGET_BLANK},
{blackfriday.HTML_NOFOLLOW_LINKS},
+ {blackfriday.HTML_NOREFERRER_LINKS},
{blackfriday.HTML_SMARTYPANTS_DASHES},
{blackfriday.HTML_SMARTYPANTS_LATEX_DASHES},
}
@@ -214,6 +215,7 @@ func TestGetHTMLRendererAllFlags(t *testing.T) {
ctx.Config.Fractions = true
ctx.Config.HrefTargetBlank = true
ctx.Config.NofollowLinks = true
+ ctx.Config.NoreferrerLinks = true
ctx.Config.LatexDashes = true
ctx.Config.PlainIDAnchors = true
ctx.Config.SmartDashes = true