Class: ProxyDaemon::Worker

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

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(parser = nil, parse_method = nil) ⇒ Worker

Returns a new instance of Worker.



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# File 'lib/proxy_daemon/worker.rb', line 10

def initialize(parser = nil, parse_method = nil)
  @client = Net::HTTP.Proxy(nil, nil)
  @parser = parser
  @parse_method = parse_method
  @url = ''
end

Instance Attribute Details

#url ⇒ Object

Returns the value of attribute url.



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# File 'lib/proxy_daemon/worker.rb', line 8

def url
  @url
end

Instance Method Details

#answer(answer, data = nil) ⇒ Object 



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# File 'lib/proxy_daemon/worker.rb', line 37

def answer(answer, data = nil)
  begin
    pack = {answer: answer}
    pack[:data] = data if data
    
    $stdout.puts pack.to_json
    $stdout.flush
  rescue Errno::EPIPE => e
    log 'Broken pipe with daemon, exiting...'.yellow
    Kernel.exit!
  rescue => e
    log e.inspect.red
  end
end

#call(&block) ⇒ Object 



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# File 'lib/proxy_daemon/worker.rb', line 112

def call(&block)
  $stdout.sync = true
  @block = block if block_given?
  proxy = nil

  loop do
    begin
      task = JSON.parse(listen)
      
      case task['command']
      when 'proxy'
        proxy = task['proxy']
        changeProxy(proxy)
        process(@url) unless @url.empty?
      when 'url'
        @url = task['url']
        process(@url)
      when 'exit'
        exit!
      end
    rescue => e
      log "rescue in #{'call'.yellow}: #{e.inspect.red}"
      answer 'error'
    end
  end
end

#changeProxy(proxy) ⇒ Object 



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# File 'lib/proxy_daemon/worker.rb', line 96

def changeProxy(proxy)
  if proxy == 'localhost' || proxy.nil? || (proxy = proxy.split(/\s+/)).length < 2
    ENV['http_proxy'] = nil
  else
    ENV['http_proxy'] = "http://#{proxy[0]}:#{proxy[1]}"
  end
end

#listen ⇒ Object 



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# File 'lib/proxy_daemon/worker.rb', line 17

def listen
  begin
    command = ''
    Timeout::timeout(6) {
      command = ($stdin.gets || String.new).strip
      log ('Task: ' + command.to_s.yellow)

      if command.empty?
        log "Got empty answer from daemon, exiting...".yellow
        raise Timeout::Error
      end
    }
  rescue Timeout::Error
    answer 'timeout'
    Kernel.exit!
  end

  command
end

#log(msg) ⇒ Object 



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# File 'lib/proxy_daemon/worker.rb', line 139

def log(msg)
  $stderr.syswrite "[child #{Process.pid}]".magenta + " #{msg}\n"
  $stderr.flush
end

#parse(body) ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/proxy_daemon/worker.rb', line 104

def parse(body)
  raise NotImplementedError if @parser.nil? && @block.nil?
  
  @block.call(self, body) if @block
  @parser.send(:"parse_#{@parse_method}", self, body) if @parser
#      instance_exec body, &@block
end

#process(url) ⇒ Object 



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# File 'lib/proxy_daemon/worker.rb', line 52

def process(url)
  begin
    uri = URI(url)
    Timeout::timeout(15) {
      @client = Net::HTTP.new(uri.host, uri.port)
      @client.use_ssl = (uri.scheme == 'https')
      @client.verify_mode = OpenSSL::SSL::VERIFY_NONE if uri.scheme == 'https'
      #@client.set_debug_output($stderr)

      @client.start { |http|
        req = Net::HTTP::Get.new(uri,
          'Connection' => 'keep-alive',
          'Accept' => 'text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8',
          'Upgrade-Insecure-Requests' => '1',
          'User-Agent' => 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_5) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.13 Safari/537.36',
          'Accept-Language' => 'en-US,en;q=0.8,ru;q=0.6'
        )
        @page = http.request(req)
      }
    }

    if (!@page.is_a?(Net::HTTPOK) || @page.body.empty?)
      log @page
      raise Net::HTTPBadResponse
    end

    res = parse(@page.body)

    if !!res === res || res.nil? then answer(res ? 'ok' : 'error')
    else  answer('ok', res) end
  rescue Timeout::Error, Errno::ETIMEDOUT, Errno::ECONNREFUSED,
  Errno::EINVAL, Errno::ECONNRESET, Errno::ENETUNREACH, SocketError, EOFError,
  TypeError, Zlib::BufError, Net::HTTPExceptions, Net::HTTPBadResponse, OpenSSL::SSL::SSLError => e
    log 'proxy'.red + " in #{'process'.yellow}: #{e.inspect.red}"
    answer 'proxy'
  rescue Interrupt => e
    log 'Interrupted by user, exiting...'.yellow
    Kernel.exit!
  rescue Exception => e
    log "rescue in #{'process'.yellow}: #{e.inspect},\n#{e.backtrace.join("\n").red}"
    answer 'error'
  end
end