Module: WebSocket::HTTP::Headers

Included in:
Request, Response
Defined in:
lib/websocket/http/headers.rb

Constant Summary collapse

MAX_LINE_LENGTH = 
4096
CR = 
0x0D
LF = 
0x0A
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

/^([!#\$%&'\*\+\-\.\^_`\|~0-9a-z]+):\s*([\x20-\x7e]*?)\s*$/i

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#headers ⇒ Object (readonly)

Returns the value of attribute headers.



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# File 'lib/websocket/http/headers.rb', line 38

def headers
  @headers
end

Instance Method Details

#complete? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/websocket/http/headers.rb', line 46

def complete?
  @stage == 2
end

#error? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/websocket/http/headers.rb', line 50

def error?
  @stage == -1
end

#initialize ⇒ Object 



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# File 'lib/websocket/http/headers.rb', line 40

def initialize
  @buffer  = []
  @headers = {}
  @stage   = 0
end

#parse(data) ⇒ Object 



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# File 'lib/websocket/http/headers.rb', line 54

def parse(data)
  data.each_byte do |byte|
    if byte == 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 << byte if @stage >= 0
      error if @stage < 2 and @buffer.size > MAX_LINE_LENGTH
    end
  end
  @env['rack.input'] = StringIO.new(string_buffer) if @env
end