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#
# httputils.rb -- HTTPUtils Module
#
# Author: IPR -- Internet Programming with Ruby -- writers
# Copyright (c) 2000, 2001 TAKAHASHI Masayoshi, GOTOU Yuuzou
# Copyright (c) 2002 Internet Programming with Ruby writers. All rights
# reserved.
#
# $IPR: httputils.rb,v 1.34 2003/06/05 21:34:08 gotoyuzo Exp $
require 'socket'
require 'tempfile'
module WEBrick
CR = "\x0d" # :nodoc:
LF = "\x0a" # :nodoc:
CRLF = "\x0d\x0a" # :nodoc:
##
# HTTPUtils provides utility methods for working with the HTTP protocol.
#
# This module is generally used internally by WEBrick
module HTTPUtils
##
# Normalizes a request path. Raises an exception if the path cannot be
# normalized.
def normalize_path(path)
raise "abnormal path `#{path}'" if path[0] != ?/
ret = path.dup
ret.gsub!(%r{/+}o, '/') # // => /
while ret.sub!(%r'/\.(?:/|\Z)', '/'); end # /. => /
while ret.sub!(%r'/(?!\.\./)[^/]+/\.\.(?:/|\Z)', '/'); end # /foo/.. => /foo
raise "abnormal path `#{path}'" if %r{/\.\.(/|\Z)} =~ ret
ret
end
module_function :normalize_path
##
# Default mime types
DefaultMimeTypes = {
"ai" => "application/postscript",
"asc" => "text/plain",
"avi" => "video/x-msvideo",
"bin" => "application/octet-stream",
"bmp" => "image/bmp",
"class" => "application/octet-stream",
"cer" => "application/pkix-cert",
"crl" => "application/pkix-crl",
"crt" => "application/x-x509-ca-cert",
#"crl" => "application/x-pkcs7-crl",
"css" => "text/css",
"dms" => "application/octet-stream",
"doc" => "application/msword",
"dvi" => "application/x-dvi",
"eps" => "application/postscript",
"etx" => "text/x-setext",
"exe" => "application/octet-stream",
"gif" => "image/gif",
"htm" => "text/html",
"html" => "text/html",
"jpe" => "image/jpeg",
"jpeg" => "image/jpeg",
"jpg" => "image/jpeg",
"js" => "application/javascript",
"lha" => "application/octet-stream",
"lzh" => "application/octet-stream",
"mov" => "video/quicktime",
"mpe" => "video/mpeg",
"mpeg" => "video/mpeg",
"mpg" => "video/mpeg",
"pbm" => "image/x-portable-bitmap",
"pdf" => "application/pdf",
"pgm" => "image/x-portable-graymap",
"png" => "image/png",
"pnm" => "image/x-portable-anymap",
"ppm" => "image/x-portable-pixmap",
"ppt" => "application/vnd.ms-powerpoint",
"ps" => "application/postscript",
"qt" => "video/quicktime",
"ras" => "image/x-cmu-raster",
"rb" => "text/plain",
"rd" => "text/plain",
"rtf" => "application/rtf",
"sgm" => "text/sgml",
"sgml" => "text/sgml",
"svg" => "image/svg+xml",
"tif" => "image/tiff",
"tiff" => "image/tiff",
"txt" => "text/plain",
"xbm" => "image/x-xbitmap",
"xhtml" => "text/html",
"xls" => "application/vnd.ms-excel",
"xml" => "text/xml",
"xpm" => "image/x-xpixmap",
"xwd" => "image/x-xwindowdump",
"zip" => "application/zip",
}
##
# Loads Apache-compatible mime.types in +file+.
def load_mime_types(file)
open(file){ |io|
hash = Hash.new
io.each{ |line|
next if /^#/ =~ line
line.chomp!
mimetype, ext0 = line.split(/\s+/, 2)
next unless ext0
next if ext0.empty?
ext0.split(/\s+/).each{ |ext| hash[ext] = mimetype }
}
hash
}
end
module_function :load_mime_types
##
# Returns the mime type of +filename+ from the list in +mime_tab+. If no
# mime type was found application/octet-stream is returned.
def mime_type(filename, mime_tab)
suffix1 = (/\.(\w+)$/ =~ filename && $1.downcase)
suffix2 = (/\.(\w+)\.[\w\-]+$/ =~ filename && $1.downcase)
mime_tab[suffix1] || mime_tab[suffix2] || "application/octet-stream"
end
module_function :mime_type
##
# Parses an HTTP header +raw+ into a hash of header fields with an Array
# of values.
def parse_header(raw)
header = Hash.new([].freeze)
field = nil
raw.each_line{|line|
case line
when /^([A-Za-z0-9!\#$%&'*+\-.^_`|~]+):\s*(.*?)\s*\z/om
field, value = $1, $2
field.downcase!
header[field] = [] unless header.has_key?(field)
header[field] << value
when /^\s+(.*?)\s*\z/om
value = $1
unless field
raise HTTPStatus::BadRequest, "bad header '#{line}'."
end
header[field][-1] << " " << value
else
raise HTTPStatus::BadRequest, "bad header '#{line}'."
end
}
header.each{|key, values|
values.each{|value|
value.strip!
value.gsub!(/\s+/, " ")
}
}
header
end
module_function :parse_header
##
# Splits a header value +str+ according to HTTP specification.
def split_header_value(str)
str.scan(%r'\G((?:"(?:\\.|[^"])+?"|[^",]+)+)
(?:,\s*|\Z)'xn).flatten
end
module_function :split_header_value
##
# Parses a Range header value +ranges_specifier+
def parse_range_header(ranges_specifier)
if /^bytes=(.*)/ =~ ranges_specifier
byte_range_set = split_header_value($1)
byte_range_set.collect{|range_spec|
case range_spec
when /^(\d+)-(\d+)/ then $1.to_i .. $2.to_i
when /^(\d+)-/ then $1.to_i .. -1
when /^-(\d+)/ then -($1.to_i) .. -1
else return nil
end
}
end
end
module_function :parse_range_header
##
# Parses q values in +value+ as used in Accept headers.
def parse_qvalues(value)
tmp = []
if value
parts = value.split(/,\s*/)
parts.each {|part|
if m = %r{^([^\s,]+?)(?:;\s*q=(\d+(?:\.\d+)?))?$}.match(part)
val = m[1]
q = (m[2] or 1).to_f
tmp.push([val, q])
end
}
tmp = tmp.sort_by{|val, q| -q}
tmp.collect!{|val, q| val}
end
return tmp
end
module_function :parse_qvalues
##
# Removes quotes and escapes from +str+
def dequote(str)
ret = (/\A"(.*)"\Z/ =~ str) ? $1 : str.dup
ret.gsub!(/\\(.)/, "\\1")
ret
end
module_function :dequote
##
# Quotes and escapes quotes in +str+
def quote(str)
'"' << str.gsub(/[\\\"]/o, "\\\1") << '"'
end
module_function :quote
##
# Stores multipart form data. FormData objects are created when
# WEBrick::HTTPUtils.parse_form_data is called.
class FormData < String
EmptyRawHeader = [].freeze # :nodoc:
EmptyHeader = {}.freeze # :nodoc:
##
# The name of the form data part
attr_accessor :name
##
# The filename of the form data part
attr_accessor :filename
attr_accessor :next_data # :nodoc:
protected :next_data
##
# Creates a new FormData object.
#
# +args+ is an Array of form data entries. One FormData will be created
# for each entry.
#
# This is called by WEBrick::HTTPUtils.parse_form_data for you
def initialize(*args)
@name = @filename = @next_data = nil
if args.empty?
@raw_header = []
@header = nil
super("")
else
@raw_header = EmptyRawHeader
@header = EmptyHeader
super(args.shift)
unless args.empty?
@next_data = self.class.new(*args)
end
end
end
##
# Retrieves the header at the first entry in +key+
def [](*key)
begin
@header[key[0].downcase].join(", ")
rescue StandardError, NameError
super
end
end
##
# Adds +str+ to this FormData which may be the body, a header or a
# header entry.
#
# This is called by WEBrick::HTTPUtils.parse_form_data for you
def <<(str)
if @header
super
elsif str == CRLF
@header = HTTPUtils::parse_header(@raw_header.join)
if cd = self['content-disposition']
if /\s+name="(.*?)"/ =~ cd then @name = $1 end
if /\s+filename="(.*?)"/ =~ cd then @filename = $1 end
end
else
@raw_header << str
end
self
end
##
# Adds +data+ at the end of the chain of entries
#
# This is called by WEBrick::HTTPUtils.parse_form_data for you.
def append_data(data)
tmp = self
while tmp
unless tmp.next_data
tmp.next_data = data
break
end
tmp = tmp.next_data
end
self
end
##
# Yields each entry in this FormData
def each_data
tmp = self
while tmp
next_data = tmp.next_data
yield(tmp)
tmp = next_data
end
end
##
# Returns all the FormData as an Array
def list
ret = []
each_data{|data|
ret << data.to_s
}
ret
end
##
# A FormData will behave like an Array
alias :to_ary :list
##
# This FormData's body
def to_s
String.new(self)
end
end
##
# Parses the query component of a URI in +str+
def parse_query(str)
query = Hash.new
if str
str.split(/[&;]/).each{|x|
next if x.empty?
key, val = x.split(/=/,2)
key = unescape_form(key)
val = unescape_form(val.to_s)
val = FormData.new(val)
val.name = key
if query.has_key?(key)
query[key].append_data(val)
next
end
query[key] = val
}
end
query
end
module_function :parse_query
##
# Parses form data in +io+ with the given +boundary+
def parse_form_data(io, boundary)
boundary_regexp = /\A--#{Regexp.quote(boundary)}(--)?#{CRLF}\z/
form_data = Hash.new
return form_data unless io
data = nil
io.each_line{|line|
if boundary_regexp =~ line
if data
data.chop!
key = data.name
if form_data.has_key?(key)
form_data[key].append_data(data)
else
form_data[key] = data
end
end
data = FormData.new
next
else
if data
data << line
end
end
}
return form_data
end
module_function :parse_form_data
#####
reserved = ';/?:@&=+$,'
num = '0123456789'
lowalpha = 'abcdefghijklmnopqrstuvwxyz'
upalpha = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
mark = '-_.!~*\'()'
unreserved = num + lowalpha + upalpha + mark
control = (0x0..0x1f).collect{|c| c.chr }.join + "\x7f"
space = " "
delims = '<>#%"'
unwise = '{}|\\^[]`'
nonascii = (0x80..0xff).collect{|c| c.chr }.join
module_function
# :stopdoc:
def _make_regex(str) /([#{Regexp.escape(str)}])/n end
def _make_regex!(str) /([^#{Regexp.escape(str)}])/n end
def _escape(str, regex)
str = str.b
str.gsub!(regex) {"%%%02X" % $1.ord}
# %-escaped string should contain US-ASCII only
str.force_encoding(Encoding::US_ASCII)
end
def _unescape(str, regex)
str = str.b
str.gsub!(regex) {$1.hex.chr}
# encoding of %-unescaped string is unknown
str
end
UNESCAPED = _make_regex(control+space+delims+unwise+nonascii)
UNESCAPED_FORM = _make_regex(reserved+control+delims+unwise+nonascii)
NONASCII = _make_regex(nonascii)
ESCAPED = /%([0-9a-fA-F]{2})/
UNESCAPED_PCHAR = _make_regex!(unreserved+":@&=+$,")
# :startdoc:
##
# Escapes HTTP reserved and unwise characters in +str+
def escape(str)
_escape(str, UNESCAPED)
end
##
# Unescapes HTTP reserved and unwise characters in +str+
def unescape(str)
_unescape(str, ESCAPED)
end
##
# Escapes form reserved characters in +str+
def escape_form(str)
ret = _escape(str, UNESCAPED_FORM)
ret.gsub!(/ /, "+")
ret
end
##
# Unescapes form reserved characters in +str+
def unescape_form(str)
_unescape(str.gsub(/\+/, " "), ESCAPED)
end
##
# Escapes path +str+
def escape_path(str)
result = ""
str.scan(%r{/([^/]*)}).each{|i|
result << "/" << _escape(i[0], UNESCAPED_PCHAR)
}
return result
end
##
# Escapes 8 bit characters in +str+
def escape8bit(str)
_escape(str, NONASCII)
end
end
end