93 lines
2.1 KiB
Ruby
93 lines
2.1 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::File serves files below the +root+ directory given, according to the
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# path info of the Rack request.
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# e.g. when Rack::File.new("/etc") is used, you can access 'passwd' file
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# as http://localhost:9292/passwd
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#
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# Handlers can detect if bodies are a Rack::File, and use mechanisms
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# like sendfile on the +path+.
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class File
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attr_accessor :root
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attr_accessor :path
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alias :to_path :path
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def initialize(root)
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@root = 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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@path_info = Utils.unescape(env["PATH_INFO"])
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return forbidden if @path_info.include? ".."
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@path = F.join(@root, @path_info)
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begin
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if F.file?(@path) && F.readable?(@path)
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serving
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else
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raise Errno::EPERM
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end
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rescue SystemCallError
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not_found
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end
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end
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def forbidden
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body = "Forbidden\n"
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[403, {"Content-Type" => "text/plain",
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"Content-Length" => body.size.to_s,
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"X-Cascade" => "pass"},
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[body]]
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end
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# NOTE:
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# We check via File::size? whether this file provides size info
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# via stat (e.g. /proc files often don't), otherwise we have to
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# figure it out by reading the whole file into memory. And while
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# we're at it we also use this as body then.
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def serving
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if size = F.size?(@path)
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body = self
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else
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body = [F.read(@path)]
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size = Utils.bytesize(body.first)
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end
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[200, {
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"Last-Modified" => F.mtime(@path).httpdate,
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"Content-Type" => Mime.mime_type(F.extname(@path), 'text/plain'),
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"Content-Length" => size.to_s
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}, body]
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end
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def not_found
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body = "File not found: #{@path_info}\n"
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[404, {"Content-Type" => "text/plain",
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"Content-Length" => body.size.to_s,
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"X-Cascade" => "pass"},
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[body]]
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end
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def each
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F.open(@path, "rb") { |file|
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while part = file.read(8192)
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yield part
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end
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}
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end
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end
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end
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