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Fix relative links in postprocessed images (#16334) (#16340)

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* Fix relative links in postprocessed images (#16334)

If a pre-post-processed file contains relative img tags these need to be updated
and joined correctly with the prefix. Finally, the node attributes need to be updated.

Fix #16308

Signed-off-by: Andrew Thornton <art27@cantab.net>
Co-authored-by: 6543 <6543@obermui.de>
This commit is contained in:
zeripath 2021-07-04 15:28:29 +01:00 committed by GitHub
parent 50084daa4c
commit c65e49d72f
No known key found for this signature in database
GPG key ID: 4AEE18F83AFDEB23
2 changed files with 28 additions and 1 deletions
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3
modules/markup/html.go
View file

@ -401,7 +401,7 @@ func (ctx *postProcessCtx) visitNode(node *html.Node, visitText bool) {
}
case html.ElementNode:
if node.Data == "img" {
for _, attr := range node.Attr {
for i, attr := range node.Attr {
if attr.Key != "src" {
continue
}
@ -414,6 +414,7 @@ func (ctx *postProcessCtx) visitNode(node *html.Node, visitText bool) {
attr.Val = util.URLJoin(prefix, attr.Val)
}
node.Attr[i] = attr
}
} else if node.Data == "a" {
visitText = false

26
modules/markup/html_test.go
View file

@ -384,6 +384,32 @@ func TestRender_ShortLinks(t *testing.T) {
`<p><a href="https://example.org" rel="nofollow">[[foobar]]</a></p>`)
}
func TestRender_RelativeImages(t *testing.T) {
setting.AppURL = AppURL
setting.AppSubURL = AppSubURL
tree := util.URLJoin(AppSubURL, "src", "master")
test := func(input, expected, expectedWiki string) {
buffer := markdown.RenderString(input, tree, localMetas)
assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(buffer))
buffer = markdown.RenderWiki([]byte(input), setting.AppSubURL, localMetas)
assert.Equal(t, strings.TrimSpace(expectedWiki), strings.TrimSpace(buffer))
}
rawwiki := util.URLJoin(AppSubURL, "wiki", "raw")
mediatree := util.URLJoin(AppSubURL, "media", "master")
test(
`<img src="Link">`,
`<img src="`+util.URLJoin(mediatree, "Link")+`"/>`,
`<img src="`+util.URLJoin(rawwiki, "Link")+`"/>`)
test(
`<img src="./icon.png">`,
`<img src="`+util.URLJoin(mediatree, "icon.png")+`"/>`,
`<img src="`+util.URLJoin(rawwiki, "icon.png")+`"/>`)
}
func Test_ParseClusterFuzz(t *testing.T) {
setting.AppURL = AppURL
setting.AppSubURL = AppSubURL