121 lines
3 KiB
Go
121 lines
3 KiB
Go
package main
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import (
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"bufio"
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"fmt"
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"io/ioutil"
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"net/url"
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"os"
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"path/filepath"
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"sort"
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"strings"
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)
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func generateDirectoryListing(URL *url.URL, path string, config Config) (string, error) {
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var listing string
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files, err := ioutil.ReadDir(path)
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if err != nil {
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return listing, err
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}
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listing = "# Directory listing\n\n"
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// Override with .mollyhead file
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header_path := filepath.Join(path, ".mollyhead")
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_, err = os.Stat(header_path)
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if err == nil {
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header, err := ioutil.ReadFile(header_path)
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if err != nil {
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return listing, err
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}
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listing = string(header)
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}
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// Do "up" link first
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if URL.Path != "/" {
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if strings.HasSuffix(URL.Path, "/") {
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URL.Path = URL.Path[:len(URL.Path)-1]
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}
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up := filepath.Dir(URL.Path)
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listing += fmt.Sprintf("=> %s %s\n", up, "..")
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}
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// Sort files
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sort.SliceStable(files, func(i, j int) bool {
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if config.DirectoryReverse {
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i, j = j, i
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}
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if config.DirectorySort == "Name" {
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return files[i].Name() < files[j].Name()
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} else if config.DirectorySort == "Size" {
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return files[i].Size() < files[j].Size()
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} else if config.DirectorySort == "Time" {
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return files[i].ModTime().Before(files[j].ModTime())
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}
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return false // Should not happen
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})
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// Format lines
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for _, file := range files {
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// Skip dotfiles
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if strings.HasPrefix(file.Name(), ".") {
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continue
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}
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// Only list world readable files
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if uint64(file.Mode().Perm())&0444 != 0444 {
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continue
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}
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// Make sure links to directories have a trailing slash,
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// to avoid needless redirects
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relativeUrl := url.PathEscape(file.Name())
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if file.IsDir() {
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relativeUrl += "/"
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}
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listing += fmt.Sprintf("=> %s %s\n", relativeUrl, generatePrettyFileLabel(file, path, config))
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}
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return listing, nil
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}
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func generatePrettyFileLabel(info os.FileInfo, path string, config Config) string {
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var size string
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if info.IsDir() {
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size = " "
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} else if info.Size() < 1024 {
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size = fmt.Sprintf("%4d B", info.Size())
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} else if info.Size() < (1024 << 10) {
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size = fmt.Sprintf("%4d KiB", info.Size()>>10)
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} else if info.Size() < 1024<<20 {
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size = fmt.Sprintf("%4d MiB", info.Size()>>20)
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} else if info.Size() < 1024<<30 {
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size = fmt.Sprintf("%4d GiB", info.Size()>>30)
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} else if info.Size() < 1024<<40 {
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size = fmt.Sprintf("%4d TiB", info.Size()>>40)
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} else {
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size = "GIGANTIC"
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}
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name := info.Name()
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if config.DirectoryTitles && filepath.Ext(name) == "."+config.GeminiExt {
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name = readHeading(path, info)
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}
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if len(name) > 40 {
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name = name[:36] + "..."
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}
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if info.IsDir() {
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name += "/"
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}
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return fmt.Sprintf("%-40s %s %v", name, size, info.ModTime().Format("Jan _2 2006"))
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}
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func readHeading(path string, info os.FileInfo) string {
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filePath := filepath.Join(path, info.Name())
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file, err := os.Open(filePath)
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if err != nil {
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return info.Name()
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}
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defer file.Close()
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scanner := bufio.NewScanner(file)
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for scanner.Scan() {
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line := scanner.Text()
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if strings.HasPrefix(line, "# ") {
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return strings.TrimSpace(line[1:])
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}
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}
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return info.Name()
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}
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