HTTPUtils provides utility methods for working with the HTTP protocol.

This module is generally used internally by WEBrick

Namespace
Methods
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Constants
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", }
 

Default mime types

Class Public methods
dequote(str)

Removes quotes and escapes from str

# File lib/webrick/httputils.rb, line 220
def dequote(str)
  ret = (/\A"(.*)"\Z/ =~ str) ? $1 : str.dup
  ret.gsub!(/\(.)/, "\\1")
  ret
end
load_mime_types(file)

Loads Apache-compatible mime.types in file.

# File lib/webrick/httputils.rb, line 108
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
mime_type(filename, mime_tab)

Returns the mime type of filename from the list in mime_tab. If no mime type was found application/octet-stream is returned.

# File lib/webrick/httputils.rb, line 128
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
normalize_path(path)

Normalizes a request path. Raises an exception if the path cannot be normalized.

# File lib/webrick/httputils.rb, line 30
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
parse_form_data(io, boundary)

Parses form data in io with the given boundary

# File lib/webrick/httputils.rb, line 392
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
parse_header(raw)

Parses an HTTP header raw into a hash of header fields with an Array of values.

# File lib/webrick/httputils.rb, line 139
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
parse_query(str)

Parses the query component of a URI in str

# File lib/webrick/httputils.rb, line 368
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
parse_qvalues(value)

Parses q values in value as used in Accept headers.

# File lib/webrick/httputils.rb, line 199
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
parse_range_header(ranges_specifier)

Parses a Range header value ranges_specifier

# File lib/webrick/httputils.rb, line 181
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
quote(str)

Quotes and escapes quotes in str

# File lib/webrick/httputils.rb, line 230
def quote(str)
  '"' << str.gsub(/[\\"]/o, "\\\1") << '"'
end
split_header_value(str)

Splits a header value str according to HTTP specification.

# File lib/webrick/httputils.rb, line 172
def split_header_value(str)
  str.scan(%r'\G((?:"(?:\.|[^"])+?"|[^",]+)+)
                (?:,\s*|\Z)'xn).flatten
end
Instance Public methods
escape(str)

Escapes HTTP reserved and unwise characters in str

# File lib/webrick/httputils.rb, line 464
def escape(str)
  _escape(str, UNESCAPED)
end
escape8bit(str)

Escapes 8 bit characters in str

# File lib/webrick/httputils.rb, line 505
def escape8bit(str)
  _escape(str, NONASCII)
end
escape_form(str)

Escapes form reserved characters in str

# File lib/webrick/httputils.rb, line 478
def escape_form(str)
  ret = _escape(str, UNESCAPED_FORM)
  ret.gsub!(/ /, "+")
  ret
end
escape_path(str)

Escapes path str

# File lib/webrick/httputils.rb, line 494
def escape_path(str)
  result = ""
  str.scan(%r{/([^/]*)}).each{|i|
    result << "/" << _escape(i[0], UNESCAPED_PCHAR)
  }
  return result
end
unescape(str)

Unescapes HTTP reserved and unwise characters in str

# File lib/webrick/httputils.rb, line 471
def unescape(str)
  _unescape(str, ESCAPED)
end
unescape_form(str)

Unescapes form reserved characters in str

# File lib/webrick/httputils.rb, line 487
def unescape_form(str)
  _unescape(str.gsub(/\+/, " "), ESCAPED)
end