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Fix relative links in postprocessed images (#16334)

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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 10:26:04 +01:00 • committed by GitHub
parent fae07cbc8f
commit 32fd11395b
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 37 additions and 1 deletions
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3
modules/markup/html.go
View file

@ -364,7 +364,7 @@ func visitNode(ctx *RenderContext, procs []processor, node *html.Node, visitText
}
case html.ElementNode:
if node.Data == "img" {
for _, attr := range node.Attr {
for i, attr := range node.Attr {
if attr.Key != "src" {
continue
}
@ -377,6 +377,7 @@ func visitNode(ctx *RenderContext, procs []processor, node *html.Node, visitText
attr.Val = util.URLJoin(prefix, attr.Val)
}
node.Attr[i] = attr
}
} else if node.Data == "a" {
visitText = false

35
modules/markup/html_test.go
View file

@ -425,6 +425,41 @@ 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, err := markdown.RenderString(&RenderContext{
URLPrefix: tree,
Metas: localMetas,
}, input)
assert.NoError(t, err)
assert.Equal(t, strings.TrimSpace(expected), strings.TrimSpace(buffer))
buffer, err = markdown.RenderString(&RenderContext{
URLPrefix: setting.AppSubURL,
Metas: localMetas,
IsWiki: true,
}, input)
assert.NoError(t, err)
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