Class: Logstream::Client

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

Constant Summary collapse

GREEN = 
'32;1'
RED = 
'31;1'
YELLOW = 
'33;1'
BLUE = 
'34;1'
CYAN = 
'46;37;1'
LOG_TYPE_COLORS = 
{
  'apache-request' => {
    /^5/ => RED,
    /^4/ => YELLOW,
    /^[123]/ => GREEN,
  },
  'bal-access' => {
    /^5/ => RED,
    /^4/ => YELLOW,
    /^[123]/ => GREEN,
  },
  'apache-error' => RED,
  'php-error' => RED,
  'drupal-watchdog' => BLUE,
  'logtailor-error' => RED,
  'logtailor-debug' => CYAN,
}

Instance Method Summary collapse

Constructor Details

#initialize(opts = {}) ⇒ Client

Returns a new instance of Client.



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# File 'lib/logstream/client.rb', line 7

def initialize(opts = {})
  opts = { 
    :logger => Logger.new(STDOUT),
    :log_prefix => '',
    :shows => {},
    :hides => {},
    :columns => [ 'text' ],
    :no_color => false,
    :debug => false,
  }.merge(opts)
  @opts = opts
  @columns = {
    :type => "%-15s",
    :disp_time => "%s",
    :server => "%-8s",
    :text => "%s",
  }
end

Instance Method Details

#color(type, status) ⇒ Object 



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# File 'lib/logstream/client.rb', line 123

def color(type, status)
  color = LOG_TYPE_COLORS[type]
  if color.is_a? Hash
    color = color.find { |k,v| status.to_s =~ k }[1] rescue nil
  end
  color = nil if @opts[:no_color]
  begin
    print "\e[#{color}m" if color
    yield
  ensure
    print "\e[0m" if color
  end
end

#debug(msg) ⇒ Object 



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# File 'lib/logstream/client.rb', line 26

def debug(msg)
  if @opts[:debug]
    color('logtailor-debug', nil) do
      puts msg
    end
  end
end

#debug_recv(msg) ⇒ Object 



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# File 'lib/logstream/client.rb', line 38

def debug_recv(msg)
  debug("<- #{msg}")
end

#debug_send(msg) ⇒ Object 



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# File 'lib/logstream/client.rb', line 34

def debug_send(msg)
  debug("-> #{msg}")
end

#run(url, connect_message) ⇒ Object 



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# File 'lib/logstream/client.rb', line 42

def run(url, connect_message)
  EM.run do
    debug_send("connect to #{url}")
    ws = Faye::WebSocket::Client.new(url)
    ws.on :open do
      debug_send(connect_message)
      ws.send(connect_message)
    end
    ws.on :message do |body,type|
      debug_recv(body.data)
      msg = JSON.parse(body.data)
      case msg['cmd']
      when 'success'
        color('logtailor-error', msg['code']) do
          # puts "#{msg.inspect}"
        end
      when 'error'
        color('logtailor-error', msg['code']) do
          puts "#{msg.inspect}"
        end
        ws.close
        EM.stop
      when 'available'
        send_msg(ws, { 'cmd' => 'enable', 'type' => msg['type'], 'server' => msg['server'] }) if @opts[:types].include?(msg['type'])
      when 'line'
        next unless msg.all? { |k,v| @opts[:shows][k].nil? || v.to_s =~ @opts[:shows][k] }
        next if msg.any? { |k,v| @opts[:hides][k] && v.to_s =~ @opts[:hides][k] }
        p = ''
        color(msg['log_type'], msg['http_status']) do
          @opts[:columns].each do |column|
            print("#{p}#{@columns[column.to_sym] || '%s'}" % [ msg[column.to_s] ])
            p = ' '
          end
        end
        puts
      end
    end
    ws.on :close do
      @opts[:logger].info "#{@opts[:log_prefix]}: connection closed"
      ws.close
      EM.stop
    end
    ws.on :error do |error|
      @opts[:logger].info "#{@opts[:log_prefix]}: error: #{error.message}"
      ws.close
      EM.stop
    end
  end
rescue Interrupt
  # exit cleanly
end

#send_msg(ws, msg) ⇒ Object 



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# File 'lib/logstream/client.rb', line 94

def send_msg(ws, msg)
  body = msg.to_json
  debug_send(body)
  ws.send(body)
end