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The Infinite Monkey Random Typing catches a bug, inconsistent wiki path converting. Close #24276 Co-authored-by: silverwind <me@silverwind.io> Co-authored-by: Giteabot <teabot@gitea.io>
154 lines
4.4 KiB
Go
154 lines
4.4 KiB
Go
// Copyright 2023 The Gitea Authors. All rights reserved.
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// SPDX-License-Identifier: MIT
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package wiki
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import (
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"net/url"
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"path"
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"strings"
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repo_model "code.gitea.io/gitea/models/repo"
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"code.gitea.io/gitea/modules/util"
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)
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// To define the wiki related concepts:
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// * Display Segment: the text what user see for a wiki page (aka, the title):
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// - "Home Page"
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// - "100% Free"
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// - "2000-01-02 meeting"
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// * Web Path:
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// - "/wiki/Home-Page"
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// - "/wiki/100%25+Free"
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// - "/wiki/2000-01-02+meeting.-"
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// - If a segment has a suffix "DashMarker(.-)", it means that there is no dash-space conversion for this segment.
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// - If a WebPath is a "*.md" pattern, then use it directly as GitPath, to make users can access the raw file.
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// * Git Path (only space doesn't need to be escaped):
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// - "/.wiki.git/Home-Page.md"
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// - "/.wiki.git/100%25 Free.md"
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// - "/.wiki.git/2000-01-02 meeting.-.md"
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// TODO: support subdirectory in the future
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//
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// Although this package now has the ablity to support subdirectory, but the route package doesn't:
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// * Double-escaping problem: the URL "/wiki/abc%2Fdef" becomes "/wiki/abc/def" by ctx.Params, which is incorrect
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// * The old wiki code's behavior is always using %2F, instead of subdirectory, so there are a lot of legacy "%2F" files in user wikis.
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type WebPath string
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var reservedWikiNames = []string{"_pages", "_new", "_edit", "raw"}
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func validateWebPath(name WebPath) error {
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for _, s := range WebPathSegments(name) {
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if util.SliceContainsString(reservedWikiNames, s) {
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return repo_model.ErrWikiReservedName{Title: s}
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}
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}
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return nil
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}
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func hasDashMarker(s string) bool {
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return strings.HasSuffix(s, ".-")
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}
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func removeDashMarker(s string) string {
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return strings.TrimSuffix(s, ".-")
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}
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func addDashMarker(s string) string {
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return s + ".-"
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}
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func unescapeSegment(s string) (string, error) {
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if hasDashMarker(s) {
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s = removeDashMarker(s)
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} else {
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s = strings.ReplaceAll(s, "-", " ")
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}
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unescaped, err := url.QueryUnescape(s)
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if err != nil {
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return s, err // un-escaping failed, but it's still safe to return the original string, because it is only a title for end users
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}
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return unescaped, nil
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}
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func escapeSegToWeb(s string, hadDashMarker bool) string {
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if hadDashMarker || strings.Contains(s, "-") || strings.HasSuffix(s, ".md") {
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s = addDashMarker(s)
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} else {
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s = strings.ReplaceAll(s, " ", "-")
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}
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s = url.QueryEscape(s)
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return s
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}
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func WebPathSegments(s WebPath) []string {
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a := strings.Split(string(s), "/")
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for i := range a {
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a[i], _ = unescapeSegment(a[i])
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}
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return a
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}
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func WebPathToGitPath(s WebPath) string {
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if strings.HasSuffix(string(s), ".md") {
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return string(s)
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}
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a := strings.Split(string(s), "/")
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for i := range a {
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shouldAddDashMarker := hasDashMarker(a[i])
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a[i], _ = unescapeSegment(a[i])
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a[i] = escapeSegToWeb(a[i], shouldAddDashMarker)
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a[i] = strings.ReplaceAll(a[i], "%20", " ") // space is safe to be kept in git path
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a[i] = strings.ReplaceAll(a[i], "+", " ")
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}
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return strings.Join(a, "/") + ".md"
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}
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func GitPathToWebPath(s string) (wp WebPath, err error) {
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if !strings.HasSuffix(s, ".md") {
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return "", repo_model.ErrWikiInvalidFileName{FileName: s}
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}
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s = strings.TrimSuffix(s, ".md")
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a := strings.Split(s, "/")
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for i := range a {
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shouldAddDashMarker := hasDashMarker(a[i])
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if a[i], err = unescapeSegment(a[i]); err != nil {
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return "", err
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}
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a[i] = escapeSegToWeb(a[i], shouldAddDashMarker)
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}
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return WebPath(strings.Join(a, "/")), nil
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}
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func WebPathToUserTitle(s WebPath) (dir, display string) {
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dir = path.Dir(string(s))
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display = path.Base(string(s))
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display = strings.TrimSuffix(display, ".md")
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display, _ = unescapeSegment(display)
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return dir, display
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}
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func WebPathToURLPath(s WebPath) string {
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return string(s)
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}
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func WebPathFromRequest(s string) WebPath {
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s = util.PathJoinRelX(s)
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// The old wiki code's behavior is always using %2F, instead of subdirectory.
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s = strings.ReplaceAll(s, "/", "%2F")
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return WebPath(s)
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}
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func UserTitleToWebPath(base, title string) WebPath {
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// TODO: ctx.Params does un-escaping, so the URL "/wiki/abc%2Fdef" becomes "wiki path = `abc/def`", which is incorrect.
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// And the old wiki code's behavior is always using %2F, instead of subdirectory.
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// So we do not add the support for writing slashes in title at the moment.
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title = strings.TrimSpace(title)
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title = util.PathJoinRelX(base, escapeSegToWeb(title, false))
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if title == "" || title == "." {
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title = "unnamed"
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}
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return WebPath(title)
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}
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