module WebSocket::HTTP::Headers

Constants

CR

HEADER_LINE

RFC 2616 grammar rules:

CHAR           = <any US-ASCII character (octets 0 - 127)>

CTL            = <any US-ASCII control character
                 (octets 0 - 31) and DEL (127)>

SP             = <US-ASCII SP, space (32)>

HT             = <US-ASCII HT, horizontal-tab (9)>

token          = 1*<any CHAR except CTLs or separators>

separators     = "(" | ")" | "<" | ">" | "@"
               | "," | ";" | ":" | "\" | <">
               | "/" | "[" | "]" | "?" | "="
               | "{" | "}" | SP | HT

Or, as redefined in RFC 7230:

token          = 1*tchar

tchar          = "!" / "#" / "$" / "%" / "&" / "'" / "*"
               / "+" / "-" / "." / "^" / "_" / "`" / "|" / "~"
               / DIGIT / ALPHA
               ; any VCHAR, except delimiters

LF

MAX_LINE_LENGTH

Attributes

headers[R]

Public Class Methods

new() click to toggle source

# File lib/websocket/http/headers.rb, line 40
def initialize
  @buffer  = []
  @env     = {}
  @headers = {}
  @stage   = 0
end

Public Instance Methods

complete?() click to toggle source

# File lib/websocket/http/headers.rb, line 47
def complete?
  @stage == 2
end

error?() click to toggle source

# File lib/websocket/http/headers.rb, line 51
def error?
  @stage == -1
end

parse(chunk) click to toggle source

# File lib/websocket/http/headers.rb, line 55
def parse(chunk)
  chunk.each_byte do |octet|
    if octet == LF and @stage < 2
      @buffer.pop if @buffer.last == CR
      if @buffer.empty?
        complete if @stage == 1
      else
        result = case @stage
                 when 0 then start_line(string_buffer)
                 when 1 then header_line(string_buffer)
                 end

        if result
          @stage = 1
        else
          error
        end
      end
      @buffer = []
    else
      @buffer << octet if @stage >= 0
      error if @stage < 2 and @buffer.size > MAX_LINE_LENGTH
    end
  end
  @env['rack.input'] = StringIO.new(string_buffer)
end