Fix raw wiki links (#31825) (#31845)

Backport #31825 by @Zettat123

Fix #31395

This regression is introduced by #30273. To find out how GitHub handles
this case, I did [some
tests](https://github.com/go-gitea/gitea/issues/31395#issuecomment-2278929115).

I use redirect in this PR instead of checking if the corresponding `.md`
file exists when rendering the link because GitHub also uses redirect.
With this PR, there is no need to resolve the raw wiki link when
rendering a wiki page. If a wiki link points to a raw file, access will
be redirected to the raw link.

---------

Co-authored-by: Zettat123 <zettat123@gmail.com>
Co-authored-by: yp05327 <576951401@qq.com>
Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
This commit is contained in:
Giteabot 2024-08-17 11:19:26 +08:00 committed by GitHub
parent 1cf8f69b38
commit 3fe1f73268
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
5 changed files with 84 additions and 32 deletions

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@ -4,8 +4,6 @@
package markup
import (
"path"
"code.gitea.io/gitea/modules/util"
)
@ -14,13 +12,9 @@ func ResolveLink(ctx *RenderContext, link, userContentAnchorPrefix string) (resu
if !isAnchorFragment && !IsFullURLString(link) {
linkBase := ctx.Links.Base
if ctx.IsWiki {
if ext := path.Ext(link); ext == "" || ext == ".-" {
linkBase = ctx.Links.WikiLink() // the link is for a wiki page
} else if DetectMarkupTypeByFileName(link) != "" {
linkBase = ctx.Links.WikiLink() // the link is renderable as a wiki page
} else {
linkBase = ctx.Links.WikiRawLink() // otherwise, use a raw link instead to view&download medias
}
// no need to check if the link should be resolved as a wiki link or a wiki raw link
// just use wiki link here and it will be redirected to a wiki raw link if necessary
linkBase = ctx.Links.WikiLink()
} else if ctx.Links.BranchPath != "" || ctx.Links.TreePath != "" {
// if there is no BranchPath, then the link will be something like "/owner/repo/src/{the-file-path}"
// and then this link will be handled by the "legacy-ref" code and be redirected to the default branch like "/owner/repo/src/branch/main/{the-file-path}"

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@ -435,7 +435,7 @@ func TestRender_ShortLinks(t *testing.T) {
renderableFileURL := util.URLJoin(tree, "markdown_file.md")
renderableFileURLWiki := util.URLJoin(markup.TestRepoURL, "wiki", "markdown_file.md")
unrenderableFileURL := util.URLJoin(tree, "file.zip")
unrenderableFileURLWiki := util.URLJoin(markup.TestRepoURL, "wiki", "raw", "file.zip")
unrenderableFileURLWiki := util.URLJoin(markup.TestRepoURL, "wiki", "file.zip")
favicon := "http://google.com/favicon.ico"
test(

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@ -655,9 +655,9 @@ space</p>
Expected: `<p>space @mention-user<br/>
/just/a/path.bin<br/>
<a href="https://example.com/file.bin" rel="nofollow">https://example.com/file.bin</a><br/>
<a href="/wiki/raw/file.bin" rel="nofollow">local link</a><br/>
<a href="/wiki/file.bin" rel="nofollow">local link</a><br/>
<a href="https://example.com" rel="nofollow">remote link</a><br/>
<a href="/wiki/raw/file.bin" rel="nofollow">local link</a><br/>
<a href="/wiki/file.bin" rel="nofollow">local link</a><br/>
<a href="https://example.com" rel="nofollow">remote link</a><br/>
<a href="/wiki/raw/image.jpg" target="_blank" rel="nofollow noopener"><img src="/wiki/raw/image.jpg" alt="local image"/></a><br/>
<a href="/wiki/raw/path/file" target="_blank" rel="nofollow noopener"><img src="/wiki/raw/path/file" alt="local image"/></a><br/>
@ -713,9 +713,9 @@ space</p>
Expected: `<p>space @mention-user<br/>
/just/a/path.bin<br/>
<a href="https://example.com/file.bin" rel="nofollow">https://example.com/file.bin</a><br/>
<a href="https://gitea.io/wiki/raw/file.bin" rel="nofollow">local link</a><br/>
<a href="https://gitea.io/wiki/file.bin" rel="nofollow">local link</a><br/>
<a href="https://example.com" rel="nofollow">remote link</a><br/>
<a href="https://gitea.io/wiki/raw/file.bin" rel="nofollow">local link</a><br/>
<a href="https://gitea.io/wiki/file.bin" rel="nofollow">local link</a><br/>
<a href="https://example.com" rel="nofollow">remote link</a><br/>
<a href="https://gitea.io/wiki/raw/image.jpg" target="_blank" rel="nofollow noopener"><img src="https://gitea.io/wiki/raw/image.jpg" alt="local image"/></a><br/>
<a href="https://gitea.io/wiki/raw/path/file" target="_blank" rel="nofollow noopener"><img src="https://gitea.io/wiki/raw/path/file" alt="local image"/></a><br/>
@ -771,9 +771,9 @@ space</p>
Expected: `<p>space @mention-user<br/>
/just/a/path.bin<br/>
<a href="https://example.com/file.bin" rel="nofollow">https://example.com/file.bin</a><br/>
<a href="/relative/path/wiki/raw/file.bin" rel="nofollow">local link</a><br/>
<a href="/relative/path/wiki/file.bin" rel="nofollow">local link</a><br/>
<a href="https://example.com" rel="nofollow">remote link</a><br/>
<a href="/relative/path/wiki/raw/file.bin" rel="nofollow">local link</a><br/>
<a href="/relative/path/wiki/file.bin" rel="nofollow">local link</a><br/>
<a href="https://example.com" rel="nofollow">remote link</a><br/>
<a href="/relative/path/wiki/raw/image.jpg" target="_blank" rel="nofollow noopener"><img src="/relative/path/wiki/raw/image.jpg" alt="local image"/></a><br/>
<a href="/relative/path/wiki/raw/path/file" target="_blank" rel="nofollow noopener"><img src="/relative/path/wiki/raw/path/file" alt="local image"/></a><br/>
@ -831,9 +831,9 @@ space</p>
Expected: `<p>space @mention-user<br/>
/just/a/path.bin<br/>
<a href="https://example.com/file.bin" rel="nofollow">https://example.com/file.bin</a><br/>
<a href="/relative/path/wiki/raw/file.bin" rel="nofollow">local link</a><br/>
<a href="/relative/path/wiki/file.bin" rel="nofollow">local link</a><br/>
<a href="https://example.com" rel="nofollow">remote link</a><br/>
<a href="/relative/path/wiki/raw/file.bin" rel="nofollow">local link</a><br/>
<a href="/relative/path/wiki/file.bin" rel="nofollow">local link</a><br/>
<a href="https://example.com" rel="nofollow">remote link</a><br/>
<a href="/relative/path/wiki/raw/image.jpg" target="_blank" rel="nofollow noopener"><img src="/relative/path/wiki/raw/image.jpg" alt="local image"/></a><br/>
<a href="/relative/path/wiki/raw/path/file" target="_blank" rel="nofollow noopener"><img src="/relative/path/wiki/raw/path/file" alt="local image"/></a><br/>
@ -891,9 +891,9 @@ space</p>
Expected: `<p>space @mention-user<br/>
/just/a/path.bin<br/>
<a href="https://example.com/file.bin" rel="nofollow">https://example.com/file.bin</a><br/>
<a href="/relative/path/wiki/raw/file.bin" rel="nofollow">local link</a><br/>
<a href="/relative/path/wiki/file.bin" rel="nofollow">local link</a><br/>
<a href="https://example.com" rel="nofollow">remote link</a><br/>
<a href="/relative/path/wiki/raw/file.bin" rel="nofollow">local link</a><br/>
<a href="/relative/path/wiki/file.bin" rel="nofollow">local link</a><br/>
<a href="https://example.com" rel="nofollow">remote link</a><br/>
<a href="/relative/path/wiki/raw/image.jpg" target="_blank" rel="nofollow noopener"><img src="/relative/path/wiki/raw/image.jpg" alt="local image"/></a><br/>
<a href="/relative/path/wiki/raw/path/file" target="_blank" rel="nofollow noopener"><img src="/relative/path/wiki/raw/path/file" alt="local image"/></a><br/>
@ -953,9 +953,9 @@ space</p>
Expected: `<p>space @mention-user<br/>
/just/a/path.bin<br/>
<a href="https://example.com/file.bin" rel="nofollow">https://example.com/file.bin</a><br/>
<a href="/relative/path/wiki/raw/file.bin" rel="nofollow">local link</a><br/>
<a href="/relative/path/wiki/file.bin" rel="nofollow">local link</a><br/>
<a href="https://example.com" rel="nofollow">remote link</a><br/>
<a href="/relative/path/wiki/raw/file.bin" rel="nofollow">local link</a><br/>
<a href="/relative/path/wiki/file.bin" rel="nofollow">local link</a><br/>
<a href="https://example.com" rel="nofollow">remote link</a><br/>
<a href="/relative/path/wiki/raw/image.jpg" target="_blank" rel="nofollow noopener"><img src="/relative/path/wiki/raw/image.jpg" alt="local image"/></a><br/>
<a href="/relative/path/wiki/raw/path/file" target="_blank" rel="nofollow noopener"><img src="/relative/path/wiki/raw/path/file" alt="local image"/></a><br/>

View File

@ -138,18 +138,41 @@ func wikiContentsByEntry(ctx *context.Context, entry *git.TreeEntry) []byte {
return content
}
// wikiContentsByName returns the contents of a wiki page, along with a boolean
// indicating whether the page exists. Writes to ctx if an error occurs.
func wikiContentsByName(ctx *context.Context, commit *git.Commit, wikiName wiki_service.WebPath) ([]byte, *git.TreeEntry, string, bool) {
// wikiEntryByName returns the entry of a wiki page, along with a boolean
// indicating whether the entry exists. Writes to ctx if an error occurs.
// The last return value indicates whether the file should be returned as a raw file
func wikiEntryByName(ctx *context.Context, commit *git.Commit, wikiName wiki_service.WebPath) (*git.TreeEntry, string, bool, bool) {
isRaw := false
gitFilename := wiki_service.WebPathToGitPath(wikiName)
entry, err := findEntryForFile(commit, gitFilename)
if err != nil && !git.IsErrNotExist(err) {
ctx.ServerError("findEntryForFile", err)
return nil, nil, "", false
} else if entry == nil {
return nil, "", false, false
}
if entry == nil {
// check if the file without ".md" suffix exists
gitFilename := strings.TrimSuffix(gitFilename, ".md")
entry, err = findEntryForFile(commit, gitFilename)
if err != nil && !git.IsErrNotExist(err) {
ctx.ServerError("findEntryForFile", err)
return nil, "", false, false
}
isRaw = true
}
if entry == nil {
return nil, "", true, false
}
return entry, gitFilename, false, isRaw
}
// wikiContentsByName returns the contents of a wiki page, along with a boolean
// indicating whether the page exists. Writes to ctx if an error occurs.
func wikiContentsByName(ctx *context.Context, commit *git.Commit, wikiName wiki_service.WebPath) ([]byte, *git.TreeEntry, string, bool) {
entry, gitFilename, noEntry, _ := wikiEntryByName(ctx, commit, wikiName)
if entry == nil {
return nil, nil, "", true
}
return wikiContentsByEntry(ctx, entry), entry, gitFilename, false
return wikiContentsByEntry(ctx, entry), entry, gitFilename, noEntry
}
func renderViewPage(ctx *context.Context) (*git.Repository, *git.TreeEntry) {
@ -215,11 +238,14 @@ func renderViewPage(ctx *context.Context) (*git.Repository, *git.TreeEntry) {
isSideBar := pageName == "_Sidebar"
isFooter := pageName == "_Footer"
// lookup filename in wiki - get filecontent, gitTree entry , real filename
data, entry, pageFilename, noEntry := wikiContentsByName(ctx, commit, pageName)
// lookup filename in wiki - get gitTree entry , real filename
entry, pageFilename, noEntry, isRaw := wikiEntryByName(ctx, commit, pageName)
if noEntry {
ctx.Redirect(ctx.Repo.RepoLink + "/wiki/?action=_pages")
}
if isRaw {
ctx.Redirect(util.URLJoin(ctx.Repo.RepoLink, "wiki/raw", string(pageName)))
}
if entry == nil || ctx.Written() {
if wikiRepo != nil {
wikiRepo.Close()
@ -227,6 +253,15 @@ func renderViewPage(ctx *context.Context) (*git.Repository, *git.TreeEntry) {
return nil, nil
}
// get filecontent
data := wikiContentsByEntry(ctx, entry)
if ctx.Written() {
if wikiRepo != nil {
wikiRepo.Close()
}
return nil, nil
}
var sidebarContent []byte
if !isSideBar {
sidebarContent, _, _, _ = wikiContentsByName(ctx, commit, "_Sidebar")
@ -442,15 +477,24 @@ func renderEditPage(ctx *context.Context) {
ctx.Data["Title"] = displayName
ctx.Data["title"] = displayName
// lookup filename in wiki - get filecontent, gitTree entry , real filename
data, entry, _, noEntry := wikiContentsByName(ctx, commit, pageName)
// lookup filename in wiki - gitTree entry , real filename
entry, _, noEntry, isRaw := wikiEntryByName(ctx, commit, pageName)
if noEntry {
ctx.Redirect(ctx.Repo.RepoLink + "/wiki/?action=_pages")
}
if isRaw {
ctx.Error(http.StatusForbidden, "Editing of raw wiki files is not allowed")
}
if entry == nil || ctx.Written() {
return
}
// get filecontent
data := wikiContentsByEntry(ctx, entry)
if ctx.Written() {
return
}
ctx.Data["content"] = string(data)
ctx.Data["sidebarPresent"] = false
ctx.Data["sidebarContent"] = ""

View File

@ -87,6 +87,13 @@ func TestWiki(t *testing.T) {
assert.EqualValues(t, http.StatusOK, ctx.Resp.Status())
assert.EqualValues(t, "Home", ctx.Data["Title"])
assertPagesMetas(t, []string{"Home", "Page With Image", "Page With Spaced Name", "Unescaped File"}, ctx.Data["Pages"])
ctx, _ = contexttest.MockContext(t, "user2/repo1/jpeg.jpg")
ctx.SetParams("*", "jpeg.jpg")
contexttest.LoadRepo(t, ctx, 1)
Wiki(ctx)
assert.EqualValues(t, http.StatusSeeOther, ctx.Resp.Status())
assert.Equal(t, "/user2/repo1/wiki/raw/jpeg.jpg", ctx.Resp.Header().Get("Location"))
}
func TestWikiPages(t *testing.T) {
@ -160,6 +167,13 @@ func TestEditWiki(t *testing.T) {
assert.EqualValues(t, http.StatusOK, ctx.Resp.Status())
assert.EqualValues(t, "Home", ctx.Data["Title"])
assert.Equal(t, wikiContent(t, ctx.Repo.Repository, "Home"), ctx.Data["content"])
ctx, _ = contexttest.MockContext(t, "user2/repo1/wiki/jpeg.jpg?action=_edit")
ctx.SetParams("*", "jpeg.jpg")
contexttest.LoadUser(t, ctx, 2)
contexttest.LoadRepo(t, ctx, 1)
EditWiki(ctx)
assert.EqualValues(t, http.StatusForbidden, ctx.Resp.Status())
}
func TestEditWikiPost(t *testing.T) {