Class: Perus::Pinger::ChromeCommand

Inherits:
Command
  • Object
show all
Defined in:
lib/perus/pinger/chrome_command.rb

Direct Known Subclasses

Chrome, ChromeExecute, ChromeNavigate, ChromeReload

Instance Attribute Summary

Attributes inherited from Command

#id, #options

Instance Method Summary collapse

Methods inherited from Command

abstract!, abstract?, #cleanup, #darwin?, description, human_name, inherited, #initialize, metric!, metric?, option, options, #run, #shell, subclasses

Constructor Details

This class inherits a constructor from Perus::Pinger::Command

Instance Method Details

#execute(commands, &message_callback) ⇒ Object 



17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
 
# File 'lib/perus/pinger/chrome_command.rb', line 17

def execute(commands, &message_callback)
    # discover the first page shown in chrome
    tries = 0
    @page = nil
    begin
        pages = JSON.parse(RestClient.get("http://#{options.host}:#{options.port}/json"))
        pages.reject! {|page| page['url'].include?('chrome-extension')}
        @page = pages.first
    rescue Errno::ECONNREFUSED, Errno::ECONNRESET => e
        tries += 1
        sleep 3
        retry if tries < 4
        return
    end

    return if @page.nil?
    
    EM.run do
        @ws = Faye::WebSocket::Client.new(@page['webSocketDebuggerUrl'])

        @ws.on :error do |event|
            puts "Chrome error: #{event}"
            EM.stop_event_loop
        end

        @ws.on :close do |event|
            EM.stop_event_loop
        end

        @ws.on :message do |event|
            if block_given?
                json = JSON.parse(event.data)
                message_callback.call(json)
            end
        end

        # send each command, responses will appear
        commands.each do |command|
            send_command(command)
        end

        # cutoff console message loading after N seconds
        EM.add_timer(options.timeout_seconds) do
            @ws.close
        end
    end
end

#send_command(command) ⇒ Object 



13
14
15
 
# File 'lib/perus/pinger/chrome_command.rb', line 13

def send_command(command)
    @ws.send(command)
end