Failed to save the file to the "xx" directory.

Failed to save the file to the "ll" directory.

Failed to save the file to the "mm" directory.

Failed to save the file to the "wp" directory.

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Current File : /opt/alt/ruby31/share/gems/gems/rack-3.0.8/lib/rack//directory.rb
# frozen_string_literal: true

require 'time'

require_relative 'constants'
require_relative 'utils'
require_relative 'head'
require_relative 'mime'
require_relative 'files'

module Rack
  # Rack::Directory serves entries below the +root+ given, according to the
  # path info of the Rack request. If a directory is found, the file's contents
  # will be presented in an html based index. If a file is found, the env will
  # be passed to the specified +app+.
  #
  # If +app+ is not specified, a Rack::Files of the same +root+ will be used.

  class Directory
    DIR_FILE = "<tr><td class='name'><a href='%s'>%s</a></td><td class='size'>%s</td><td class='type'>%s</td><td class='mtime'>%s</td></tr>\n"
    DIR_PAGE_HEADER = <<-PAGE
<html><head>
  <title>%s</title>
  <meta http-equiv="content-type" content="text/html; charset=utf-8" />
  <style type='text/css'>
table { width:100%%; }
.name { text-align:left; }
.size, .mtime { text-align:right; }
.type { width:11em; }
.mtime { width:15em; }
  </style>
</head><body>
<h1>%s</h1>
<hr />
<table>
  <tr>
    <th class='name'>Name</th>
    <th class='size'>Size</th>
    <th class='type'>Type</th>
    <th class='mtime'>Last Modified</th>
  </tr>
    PAGE
    DIR_PAGE_FOOTER = <<-PAGE
</table>
<hr />
</body></html>
    PAGE

    # Body class for directory entries, showing an index page with links
    # to each file.
    class DirectoryBody < Struct.new(:root, :path, :files)
      # Yield strings for each part of the directory entry
      def each
        show_path = Utils.escape_html(path.sub(/^#{root}/, ''))
        yield(DIR_PAGE_HEADER % [ show_path, show_path ])

        unless path.chomp('/') == root
          yield(DIR_FILE % DIR_FILE_escape(files.call('..')))
        end

        Dir.foreach(path) do |basename|
          next if basename.start_with?('.')
          next unless f = files.call(basename)
          yield(DIR_FILE % DIR_FILE_escape(f))
        end

        yield(DIR_PAGE_FOOTER)
      end

      private

      # Escape each element in the array of html strings.
      def DIR_FILE_escape(htmls)
        htmls.map { |e| Utils.escape_html(e) }
      end
    end

    # The root of the directory hierarchy.  Only requests for files and
    # directories inside of the root directory are supported.
    attr_reader :root

    # Set the root directory and application for serving files.
    def initialize(root, app = nil)
      @root = ::File.expand_path(root)
      @app = app || Files.new(@root)
      @head = Head.new(method(:get))
    end

    def call(env)
      # strip body if this is a HEAD call
      @head.call env
    end

    # Internals of request handling.  Similar to call but does
    # not remove body for HEAD requests.
    def get(env)
      script_name = env[SCRIPT_NAME]
      path_info = Utils.unescape_path(env[PATH_INFO])

      if client_error_response = check_bad_request(path_info) || check_forbidden(path_info)
        client_error_response
      else
        path = ::File.join(@root, path_info)
        list_path(env, path, path_info, script_name)
      end
    end

    # Rack response to use for requests with invalid paths, or nil if path is valid.
    def check_bad_request(path_info)
      return if Utils.valid_path?(path_info)

      body = "Bad Request\n"
      [400, { CONTENT_TYPE => "text/plain",
        CONTENT_LENGTH => body.bytesize.to_s,
        "x-cascade" => "pass" }, [body]]
    end

    # Rack response to use for requests with paths outside the root, or nil if path is inside the root.
    def check_forbidden(path_info)
      return unless path_info.include? ".."
      return if ::File.expand_path(::File.join(@root, path_info)).start_with?(@root)

      body = "Forbidden\n"
      [403, { CONTENT_TYPE => "text/plain",
        CONTENT_LENGTH => body.bytesize.to_s,
        "x-cascade" => "pass" }, [body]]
    end

    # Rack response to use for directories under the root.
    def list_directory(path_info, path, script_name)
      url_head = (script_name.split('/') + path_info.split('/')).map do |part|
        Utils.escape_path part
      end

      # Globbing not safe as path could contain glob metacharacters
      body = DirectoryBody.new(@root, path, ->(basename) do
        stat = stat(::File.join(path, basename))
        next unless stat

        url = ::File.join(*url_head + [Utils.escape_path(basename)])
        mtime = stat.mtime.httpdate
        if stat.directory?
          type = 'directory'
          size = '-'
          url << '/'
          if basename == '..'
            basename = 'Parent Directory'
          else
            basename << '/'
          end
        else
          type = Mime.mime_type(::File.extname(basename))
          size = filesize_format(stat.size)
        end

        [ url, basename, size, type, mtime ]
      end)

      [ 200, { CONTENT_TYPE => 'text/html; charset=utf-8' }, body ]
    end

    # File::Stat for the given path, but return nil for missing/bad entries.
    def stat(path)
      ::File.stat(path)
    rescue Errno::ENOENT, Errno::ELOOP
      return nil
    end

    # Rack response to use for files and directories under the root.
    # Unreadable and non-file, non-directory entries will get a 404 response.
    def list_path(env, path, path_info, script_name)
      if (stat = stat(path)) && stat.readable?
        return @app.call(env) if stat.file?
        return list_directory(path_info, path, script_name) if stat.directory?
      end

      entity_not_found(path_info)
    end

    # Rack response to use for unreadable and non-file, non-directory entries.
    def entity_not_found(path_info)
      body = "Entity not found: #{path_info}\n"
      [404, { CONTENT_TYPE => "text/plain",
        CONTENT_LENGTH => body.bytesize.to_s,
        "x-cascade" => "pass" }, [body]]
    end

    # Stolen from Ramaze
    FILESIZE_FORMAT = [
      ['%.1fT', 1 << 40],
      ['%.1fG', 1 << 30],
      ['%.1fM', 1 << 20],
      ['%.1fK', 1 << 10],
    ]

    # Provide human readable file sizes
    def filesize_format(int)
      FILESIZE_FORMAT.each do |format, size|
        return format % (int.to_f / size) if int >= size
      end

      "#{int}B"
    end
  end
end

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