Class: GripControl

Inherits:
Object
  • Object
show all
Defined in:
lib/gripcontrol.rb

Class Method Summary collapse

Class Method Details

.create_grip_channel_header(channels) ⇒ Object 



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# File 'lib/gripcontrol.rb', line 125

def self.create_grip_channel_header(channels)
  if channels.is_a?(Channel)
    channels = [channels]
  elsif channels.is_a?(String)
    channels = [Channel.new(channels)]
  end
  raise 'channels.length equal to 0' unless channels.length > 0
  parts = []
  channels.each do |channel|
    s = channel.name
    if !channel.prev_id.nil?
      s += '; prev-id=%s' % [channel.prev_id]
    end
    parts.push(s)
  end
  return parts.join(', ')
end

.create_hold(mode, channels, response) ⇒ Object 



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# File 'lib/gripcontrol.rb', line 21

def self.create_hold(mode, channels, response)
  hold = Hash.new
  hold['mode'] = mode
  if channels.is_a?(Channel)
    channels = [channels]
  elsif channels.is_a?(String)
    channels = [Channel.new(channels)]
  end
  raise 'channels.length equal to 0' unless channels.length > 0
  ichannels = []
  channels.each do |channel|
    if channel.is_a?(String)
      channel = Channel(channel)
    end
    ichannel = Hash.new
    ichannel['name'] = channel.name
    if !channel.prev_id.nil?
      ichannel['prev-id'] = channel.prev_id
    end
    ichannels.push(ichannel)
  end
  hold['channels'] = ichannels
  iresponse = nil
  if !response.nil?
    if response.is_a?(String)
      response = Response(nil, nil, nil, response)
    end
    iresponse = Hash.new
    if !response.code.nil?
      iresponse['code'] = response.code
    end
    if !response.reason.nil?
      iresponse['reason'] = response.reason
    end
    if !response.headers.nil? and response.headers.length > 0
      iresponse['headers'] = response.headers
    end
    if !response.body.nil?
      if response.body.encoding.name == 'ASCII-8BIT'
        iresponse['body-bin'] = Base64.encode64(response.body)
      else
        iresponse['body'] = response.body
      end
    end
  end
  instruct = Hash.new
  instruct['hold'] = hold
  if !iresponse.nil?
    instruct['response'] = iresponse
  end
  return instruct.to_json
end

.create_hold_response(channels, response = nil) ⇒ Object 



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# File 'lib/gripcontrol.rb', line 143

def self.create_hold_response(channels, response=nil)
  return GripControl.create_hold('response', channels, response)
end

.create_hold_stream(channels, response = nil) ⇒ Object 



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# File 'lib/gripcontrol.rb', line 147

def self.create_hold_stream(channels, response=nil)
  return create_hold('stream', channels, response)
end

.decode_websocket_events(body) ⇒ Object 



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# File 'lib/gripcontrol.rb', line 151

def self.decode_websocket_events(body)
  out = []
  start = 0
  while start < body.length do
    at = body.index('\r\n', start)
    if !at.nil?
      raise 'bad format'
    end
    typeline = body[start..at - 1]
    start = at + 2
    at = typeline.index(' ')
    if !at.nil?
      etype = typeline[0..at - 1]
      clen = ('0x' + typeline[at + 1..-1]).to_s(16)
      content = body[start:start + clen - 1]
      start += clen + 2
      e = WebSocketEvent.new(etype, content)
    else
      e = WebSocketEvent.new(typeline)
    end
    out.push(e)
  end
  return out
end

.encode_websocket_events(events) ⇒ Object 



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# File 'lib/gripcontrol.rb', line 176

def self.encode_websocket_events(events)
  out = ''
  events.each do |event|
    if !event.content.nil?
      out += '%s %x\r\n%s\r\n' % [e.type, event.content.length, event.content]
    else
      out += '%s\r\n' % [e.type]
    end
  end
  return out
end

.parse_grip_uri(uri) ⇒ Object 



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# File 'lib/gripcontrol.rb', line 74

def self.parse_grip_uri(uri)
  uri = URI(uri)
  params = CGI.parse(uri.query)
  iss = nil
  key = nil
  if params.key?('iss')
    iss = params['iss'][0]
    params.delete('iss')
  end
  if params.key?('key')
    key = params['key'][0]
    params.delete('key')
  end
  if !key.nil? and key.start_with?('base64:')
    key = Base64.decode64(key[7..-1])
  end
  qs = build_query_string(params)
  path = uri.path
  if path.end_with?('/')
    path = path[0..-2]
  end
  control_uri = parsed.scheme + '://' + parsed.host + path
  if !qs.nil? and !qs.empty?
    control_uri += '?' + qs
  end
  out = {'control_uri' => control_uri}
  if !iss.nil?
    out['control_iss'] = iss
  end
  if !key.nil?
    out['key'] = key
  end
  return out
end

.validate_sig(token, key) ⇒ Object 



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# File 'lib/gripcontrol.rb', line 109

def self.validate_sig(token, key)
  token = token.encode('utf-8')
  begin
    claim = JWT.decode(token, key, verify_expiration=false)
  rescue
    return false
  end
  if !claim.key?('exp')
    return false
  end
  if Time.now.utc.to_i >= claim['exp']
    return false
  end
  return true
end

.websocket_control_message(type, args = nil) ⇒ Object 



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# File 'lib/gripcontrol.rb', line 188

def self.websocket_control_message(type, args=nil)
  if !args.nil?
    out = Marshal.load(Marshal.dump(args))
  else
    out = Hash.new
  end
  out['type'] = type
  return out.to_json
end