157 lines
3.9 KiB
Ruby
157 lines
3.9 KiB
Ruby
require 'time'
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require 'rack/utils'
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require 'rack/mime'
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module Rack
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# Rack::Directory serves entries below the +root+ given, according to the
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# path info of the Rack request. If a directory is found, the file's contents
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# will be presented in an html based index. If a file is found, the env will
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# be passed to the specified +app+.
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#
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# If +app+ is not specified, a Rack::File of the same +root+ will be used.
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class Directory
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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>"
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DIR_PAGE = <<-PAGE
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<html><head>
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<title>%s</title>
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<meta http-equiv="content-type" content="text/html; charset=utf-8" />
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<style type='text/css'>
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table { width:100%%; }
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.name { text-align:left; }
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.size, .mtime { text-align:right; }
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.type { width:11em; }
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.mtime { width:15em; }
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</style>
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</head><body>
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<h1>%s</h1>
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<hr />
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<table>
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<tr>
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<th class='name'>Name</th>
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<th class='size'>Size</th>
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<th class='type'>Type</th>
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<th class='mtime'>Last Modified</th>
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</tr>
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%s
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</table>
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<hr />
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</body></html>
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PAGE
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attr_reader :files
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attr_accessor :root, :path
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def initialize(root, app=nil)
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@root = F.expand_path(root)
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@app = app || Rack::File.new(@root)
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end
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def call(env)
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dup._call(env)
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end
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F = ::File
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def _call(env)
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@env = env
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@script_name = env['SCRIPT_NAME']
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@path_info = Utils.unescape(env['PATH_INFO'])
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if forbidden = check_forbidden
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forbidden
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else
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@path = F.join(@root, @path_info)
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list_path
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end
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end
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def check_forbidden
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return unless @path_info.include? ".."
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body = "Forbidden\n"
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size = Rack::Utils.bytesize(body)
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return [403, {"Content-Type" => "text/plain",
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"Content-Length" => size.to_s,
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"X-Cascade" => "pass"}, [body]]
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end
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def list_directory
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@files = [['../','Parent Directory','','','']]
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glob = F.join(@path, '*')
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Dir[glob].sort.each do |node|
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stat = stat(node)
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next unless stat
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basename = F.basename(node)
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ext = F.extname(node)
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url = F.join(@script_name, @path_info, basename)
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size = stat.size
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type = stat.directory? ? 'directory' : Mime.mime_type(ext)
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size = stat.directory? ? '-' : filesize_format(size)
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mtime = stat.mtime.httpdate
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url << '/' if stat.directory?
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basename << '/' if stat.directory?
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@files << [ url, basename, size, type, mtime ]
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end
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return [ 200, {'Content-Type'=>'text/html; charset=utf-8'}, self ]
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end
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def stat(node, max = 10)
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F.stat(node)
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rescue Errno::ENOENT, Errno::ELOOP
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return nil
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end
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# TODO: add correct response if not readable, not sure if 404 is the best
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# option
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def list_path
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@stat = F.stat(@path)
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if @stat.readable?
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return @app.call(@env) if @stat.file?
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return list_directory if @stat.directory?
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else
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raise Errno::ENOENT, 'No such file or directory'
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end
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rescue Errno::ENOENT, Errno::ELOOP
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return entity_not_found
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end
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def entity_not_found
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body = "Entity not found: #{@path_info}\n"
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size = Rack::Utils.bytesize(body)
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return [404, {"Content-Type" => "text/plain",
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"Content-Length" => size.to_s,
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"X-Cascade" => "pass"}, [body]]
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end
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def each
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show_path = @path.sub(/^#{@root}/,'')
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files = @files.map{|f| DIR_FILE % f }*"\n"
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page = DIR_PAGE % [ show_path, show_path , files ]
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page.each_line{|l| yield l }
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end
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# Stolen from Ramaze
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FILESIZE_FORMAT = [
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['%.1fT', 1 << 40],
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['%.1fG', 1 << 30],
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['%.1fM', 1 << 20],
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['%.1fK', 1 << 10],
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]
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def filesize_format(int)
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FILESIZE_FORMAT.each do |format, size|
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return format % (int.to_f / size) if int >= size
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end
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int.to_s + 'B'
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end
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end
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end
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