mirror of
https://github.com/gohugoio/hugo.git
synced 2024-12-04 23:14:03 -05:00
ab82a27d05
Fixes #4217
408 lines
10 KiB
Go
408 lines
10 KiB
Go
// Copyright 2015 The Hugo Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package helpers
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import (
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"fmt"
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"net/url"
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"path"
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"path/filepath"
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"strings"
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"github.com/PuerkitoBio/purell"
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)
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type pathBridge struct {
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}
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func (pathBridge) Base(in string) string {
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return path.Base(in)
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}
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func (pathBridge) Clean(in string) string {
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return path.Clean(in)
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}
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func (pathBridge) Dir(in string) string {
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return path.Dir(in)
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}
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func (pathBridge) Ext(in string) string {
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return path.Ext(in)
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}
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func (pathBridge) Join(elem ...string) string {
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return path.Join(elem...)
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}
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func (pathBridge) Separator() string {
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return "/"
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}
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var pb pathBridge
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func sanitizeURLWithFlags(in string, f purell.NormalizationFlags) string {
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s, err := purell.NormalizeURLString(in, f)
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if err != nil {
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return in
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}
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// Temporary workaround for the bug fix and resulting
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// behavioral change in purell.NormalizeURLString():
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// a leading '/' was inadvertently added to relative links,
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// but no longer, see #878.
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//
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// I think the real solution is to allow Hugo to
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// make relative URL with relative path,
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// e.g. "../../post/hello-again/", as wished by users
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// in issues #157, #622, etc., without forcing
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// relative URLs to begin with '/'.
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// Once the fixes are in, let's remove this kludge
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// and restore SanitizeURL() to the way it was.
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// -- @anthonyfok, 2015-02-16
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//
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// Begin temporary kludge
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u, err := url.Parse(s)
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if err != nil {
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panic(err)
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}
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if len(u.Path) > 0 && !strings.HasPrefix(u.Path, "/") {
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u.Path = "/" + u.Path
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}
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return u.String()
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// End temporary kludge
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//return s
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}
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// SanitizeURL sanitizes the input URL string.
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func SanitizeURL(in string) string {
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return sanitizeURLWithFlags(in, purell.FlagsSafe|purell.FlagRemoveTrailingSlash|purell.FlagRemoveDotSegments|purell.FlagRemoveDuplicateSlashes|purell.FlagRemoveUnnecessaryHostDots|purell.FlagRemoveEmptyPortSeparator)
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}
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// SanitizeURLKeepTrailingSlash is the same as SanitizeURL, but will keep any trailing slash.
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func SanitizeURLKeepTrailingSlash(in string) string {
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return sanitizeURLWithFlags(in, purell.FlagsSafe|purell.FlagRemoveDotSegments|purell.FlagRemoveDuplicateSlashes|purell.FlagRemoveUnnecessaryHostDots|purell.FlagRemoveEmptyPortSeparator)
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}
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// URLize is similar to MakePath, but with Unicode handling
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// Example:
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// uri: Vim (text editor)
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// urlize: vim-text-editor
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func (p *PathSpec) URLize(uri string) string {
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return p.URLEscape(p.MakePathSanitized(uri))
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}
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// URLizeFilename creates an URL from a filename by esacaping unicode letters
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// and turn any filepath separator into forward slashes.
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func (p *PathSpec) URLizeFilename(filename string) string {
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return p.URLEscape(filepath.ToSlash(filename))
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}
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// URLEscape escapes unicode letters.
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func (p *PathSpec) URLEscape(uri string) string {
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// escape unicode letters
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parsedURI, err := url.Parse(uri)
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if err != nil {
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// if net/url can not parse URL it means Sanitize works incorrectly
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panic(err)
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}
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x := parsedURI.String()
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return x
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}
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// MakePermalink combines base URL with content path to create full URL paths.
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// Example
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// base: http://spf13.com/
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// path: post/how-i-blog
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// result: http://spf13.com/post/how-i-blog
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func MakePermalink(host, plink string) *url.URL {
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base, err := url.Parse(host)
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if err != nil {
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panic(err)
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}
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p, err := url.Parse(plink)
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if err != nil {
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panic(err)
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}
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if p.Host != "" {
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panic(fmt.Errorf("Can't make permalink from absolute link %q", plink))
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}
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base.Path = path.Join(base.Path, p.Path)
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// path.Join will strip off the last /, so put it back if it was there.
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hadTrailingSlash := (plink == "" && strings.HasSuffix(host, "/")) || strings.HasSuffix(p.Path, "/")
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if hadTrailingSlash && !strings.HasSuffix(base.Path, "/") {
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base.Path = base.Path + "/"
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}
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return base
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}
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// AbsURL creates an absolute URL from the relative path given and the BaseURL set in config.
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func (p *PathSpec) AbsURL(in string, addLanguage bool) string {
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url, err := url.Parse(in)
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if err != nil {
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return in
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}
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if url.IsAbs() || strings.HasPrefix(in, "//") {
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return in
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}
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var baseURL string
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if strings.HasPrefix(in, "/") {
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u := p.BaseURL.URL()
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u.Path = ""
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baseURL = u.String()
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} else {
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baseURL = p.BaseURL.String()
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}
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if addLanguage {
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prefix := p.getLanguagePrefix()
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if prefix != "" {
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hasPrefix := false
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// avoid adding language prefix if already present
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if strings.HasPrefix(in, "/") {
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hasPrefix = strings.HasPrefix(in[1:], prefix)
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} else {
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hasPrefix = strings.HasPrefix(in, prefix)
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}
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if !hasPrefix {
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addSlash := in == "" || strings.HasSuffix(in, "/")
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in = path.Join(prefix, in)
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if addSlash {
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in += "/"
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}
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}
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}
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}
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return MakePermalink(baseURL, in).String()
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}
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func (p *PathSpec) getLanguagePrefix() string {
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if !p.multilingual {
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return ""
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}
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defaultLang := p.defaultContentLanguage
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defaultInSubDir := p.defaultContentLanguageInSubdir
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currentLang := p.Language.Lang
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if currentLang == "" || (currentLang == defaultLang && !defaultInSubDir) {
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return ""
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}
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return currentLang
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}
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// GetLangSubDir returns the given language's subdir if needed.
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func (p *PathSpec) GetLangSubDir(lang string) string {
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if !p.multilingual {
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return ""
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}
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if p.Languages.IsMultihost() {
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return ""
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}
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if lang == "" || (lang == p.defaultContentLanguage && !p.defaultContentLanguageInSubdir) {
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return ""
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}
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return lang
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}
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// IsAbsURL determines whether the given path points to an absolute URL.
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func IsAbsURL(path string) bool {
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url, err := url.Parse(path)
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if err != nil {
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return false
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}
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return url.IsAbs() || strings.HasPrefix(path, "//")
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}
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// RelURL creates a URL relative to the BaseURL root.
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// Note: The result URL will not include the context root if canonifyURLs is enabled.
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func (p *PathSpec) RelURL(in string, addLanguage bool) string {
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baseURL := p.BaseURL.String()
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canonifyURLs := p.canonifyURLs
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if (!strings.HasPrefix(in, baseURL) && strings.HasPrefix(in, "http")) || strings.HasPrefix(in, "//") {
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return in
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}
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u := in
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if strings.HasPrefix(in, baseURL) {
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u = strings.TrimPrefix(u, baseURL)
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}
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if addLanguage {
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prefix := p.getLanguagePrefix()
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if prefix != "" {
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hasPrefix := false
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// avoid adding language prefix if already present
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if strings.HasPrefix(in, "/") {
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hasPrefix = strings.HasPrefix(in[1:], prefix)
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} else {
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hasPrefix = strings.HasPrefix(in, prefix)
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}
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if !hasPrefix {
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hadSlash := strings.HasSuffix(u, "/")
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u = path.Join(prefix, u)
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if hadSlash {
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u += "/"
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}
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}
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}
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}
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if !canonifyURLs {
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u = AddContextRoot(baseURL, u)
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}
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if in == "" && !strings.HasSuffix(u, "/") && strings.HasSuffix(baseURL, "/") {
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u += "/"
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}
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if !strings.HasPrefix(u, "/") {
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u = "/" + u
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}
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return u
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}
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// AddContextRoot adds the context root to an URL if it's not already set.
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// For relative URL entries on sites with a base url with a context root set (i.e. http://example.com/mysite),
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// relative URLs must not include the context root if canonifyURLs is enabled. But if it's disabled, it must be set.
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func AddContextRoot(baseURL, relativePath string) string {
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url, err := url.Parse(baseURL)
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if err != nil {
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panic(err)
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}
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newPath := path.Join(url.Path, relativePath)
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// path strips traling slash, ignore root path.
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if newPath != "/" && strings.HasSuffix(relativePath, "/") {
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newPath += "/"
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}
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return newPath
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}
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// PrependBasePath prepends any baseURL sub-folder to the given resource
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// if canonifyURLs is disabled.
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// If canonifyURLs is set, we will globally prepend the absURL with any sub-folder,
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// so avoid doing anything here to avoid getting double paths.
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func (p *PathSpec) PrependBasePath(rel string) string {
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if p.BasePath != "" {
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rel = filepath.ToSlash(rel)
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// Need to prepend any path from the baseURL
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hadSlash := strings.HasSuffix(rel, "/")
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rel = path.Join(p.BasePath, rel)
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if hadSlash {
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rel += "/"
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}
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}
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return rel
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}
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// URLizeAndPrep applies misc sanitation to the given URL to get it in line
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// with the Hugo standard.
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func (p *PathSpec) URLizeAndPrep(in string) string {
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return p.URLPrep(p.URLize(in))
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}
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// URLPrep applies misc sanitation to the given URL.
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func (p *PathSpec) URLPrep(in string) string {
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if p.uglyURLs {
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return Uglify(SanitizeURL(in))
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}
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pretty := PrettifyURL(SanitizeURL(in))
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if path.Ext(pretty) == ".xml" {
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return pretty
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}
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url, err := purell.NormalizeURLString(pretty, purell.FlagAddTrailingSlash)
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if err != nil {
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return pretty
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}
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return url
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}
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// PrettifyURL takes a URL string and returns a semantic, clean URL.
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func PrettifyURL(in string) string {
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x := PrettifyURLPath(in)
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if path.Base(x) == "index.html" {
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return path.Dir(x)
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}
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if in == "" {
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return "/"
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}
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return x
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}
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// PrettifyURLPath takes a URL path to a content and converts it
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// to enable pretty URLs.
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// /section/name.html becomes /section/name/index.html
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// /section/name/ becomes /section/name/index.html
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// /section/name/index.html becomes /section/name/index.html
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func PrettifyURLPath(in string) string {
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return prettifyPath(in, pb)
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}
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// Uglify does the opposite of PrettifyURLPath().
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// /section/name/index.html becomes /section/name.html
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// /section/name/ becomes /section/name.html
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// /section/name.html becomes /section/name.html
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func Uglify(in string) string {
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if path.Ext(in) == "" {
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if len(in) < 2 {
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return "/"
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}
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// /section/name/ -> /section/name.html
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return path.Clean(in) + ".html"
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}
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name, ext := fileAndExt(in, pb)
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if name == "index" {
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// /section/name/index.html -> /section/name.html
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d := path.Dir(in)
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if len(d) > 1 {
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return d + ext
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}
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return in
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}
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// /.xml -> /index.xml
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if name == "" {
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return path.Dir(in) + "index" + ext
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}
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// /section/name.html -> /section/name.html
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return path.Clean(in)
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}
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