Module: Sonycam::Scanner

Extended by:
Scanner
Included in:
Scanner
Defined in:
lib/sonycam/scanner.rb

Instance Method Summary collapse

Instance Method Details

#scan(ip = nil, timeout: 10) ⇒ Object

returns array of device description XML URL



8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
 
# File 'lib/sonycam/scanner.rb', line 8

def scan ip = nil, timeout: 10
  m_search = <<-EOS
M-SEARCH * HTTP/1.1\r
HOST: 239.255.255.250:1900\r
MAN: ssdp:discover\r
MX: #{timeout}\r
ST: urn:schemas-sony-com:service:ScalarWebAPI:1\r
\r
EOS

  addresses = ip ? Array(Addrinfo.ip(ip)) : Socket.ip_address_list.reject{ |a| a.ipv4_loopback? || a.ipv6_loopback? || a.ipv6_linklocal? }
  locations = []
  addresses.map do |addr_info|
    Thread.new do
      begin
        sock = UDPSocket.new
        sock.bind(addr_info.ip_address, 0)
        sock.send(m_search, 0, '239.255.255.250', 1900)
        Timeout::timeout(timeout) do
          response = sock.recv(1024)
          headers = Hash[response.split("\r\n").map{|x| x[/^([^:]*)\s*:\s*(.*)$/]; [$1, $2]}]
          locations << headers['LOCATION'] if headers['ST'] == 'urn:schemas-sony-com:service:ScalarWebAPI:1'
        end
      rescue Timeout::Error
      rescue
        puts $!.inspect, $@
      end
    end
  end.each(&:join)
  locations
end