29 lines
805 B
Ruby
29 lines
805 B
Ruby
require 'digest/sha1'
|
|
require 'base64'
|
|
|
|
module EventMachine
|
|
module WebSocket
|
|
module Handshake04
|
|
def self.handshake(headers, _, __)
|
|
# Required
|
|
unless key = headers['sec-websocket-key']
|
|
raise HandshakeError, "sec-websocket-key header is required"
|
|
end
|
|
|
|
string_to_sign = "#{key}258EAFA5-E914-47DA-95CA-C5AB0DC85B11"
|
|
signature = Base64.encode64(Digest::SHA1.digest(string_to_sign)).chomp
|
|
|
|
upgrade = ["HTTP/1.1 101 Switching Protocols"]
|
|
upgrade << "Upgrade: websocket"
|
|
upgrade << "Connection: Upgrade"
|
|
upgrade << "Sec-WebSocket-Accept: #{signature}"
|
|
|
|
# TODO: Support sec-websocket-protocol
|
|
# TODO: sec-websocket-extensions
|
|
|
|
return upgrade.join("\r\n") + "\r\n\r\n"
|
|
end
|
|
end
|
|
end
|
|
end
|