githaven/modules/markup/markdown/transform_link.go
Rafael c1f76aea45
Use raw Wiki links for non-renderable Wiki files (#30273)
In Wiki pages, short-links created to local Wiki files were always
expanded as regular Wiki Links. In particular, if a link wanted to point
to a file that Gitea doesn't know how to render (e.g, a .zip file), a
user following the link would be silently redirected to the Wiki's home
page.

This change makes short-links* in Wiki pages be expanded to raw wiki
links, so these local wiki files may be accessed without manually
accessing their URL.

* only short-links ending in a file extension that isn't renderable are
affected.

Closes #27121.

Signed-off-by: Rafael Girão <rafael.s.girao@tecnico.ulisboa.pt>
Co-authored-by: silverwind <me@silverwind.io>
2024-04-10 17:49:57 +00:00

43 lines
1.2 KiB
Go

// Copyright 2024 The Gitea Authors. All rights reserved.
// SPDX-License-Identifier: MIT
package markdown
import (
"path/filepath"
"code.gitea.io/gitea/modules/markup"
giteautil "code.gitea.io/gitea/modules/util"
"github.com/yuin/goldmark/ast"
"github.com/yuin/goldmark/text"
)
func (g *ASTTransformer) transformLink(ctx *markup.RenderContext, v *ast.Link, reader text.Reader) {
// Links need their href to munged to be a real value
link := v.Destination
isAnchorFragment := len(link) > 0 && link[0] == '#'
if !isAnchorFragment && !markup.IsFullURLBytes(link) {
base := ctx.Links.Base
if ctx.IsWiki {
if filepath.Ext(string(link)) == "" {
// This link doesn't have a file extension - assume a regular wiki link
base = ctx.Links.WikiLink()
} else if markup.Type(string(link)) != "" {
// If it's a file type we can render, use a regular wiki link
base = ctx.Links.WikiLink()
} else {
// Otherwise, use a raw link instead
base = ctx.Links.WikiRawLink()
}
} else if ctx.Links.HasBranchInfo() {
base = ctx.Links.SrcLink()
}
link = []byte(giteautil.URLJoin(base, string(link)))
}
if isAnchorFragment {
link = []byte("#user-content-" + string(link)[1:])
}
v.Destination = link
}