Class: Rbitter::DLThread

Inherits:
Object
  • Object
show all
Defined in:
lib/rbitter/dlthread.rb

Constant Summary collapse

MAX_THREADS = 
20

Instance Method Summary collapse

Constructor Details

#initialize(dlfolder, large_flag) ⇒ DLThread

Returns a new instance of DLThread.



10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
 
# File 'lib/rbitter/dlthread.rb', line 10

def initialize(dlfolder, large_flag)
  @dest = dlfolder
  if not File.directory?(dlfolder)
    warn "[dlthread] Given download location is not available for downloading."
    warn "[dlthread] Fallback to current directory."
    @dest = "./"
  end

  if large_flag.nil?
    @large_image = false
  else
    @large_image = large_flag
  end

  @pool = Array.new
end

Instance Method Details

#<<(url_array) ⇒ Object 



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
 
# File 'lib/rbitter/dlthread.rb', line 27

def <<(url_array)
  if @pool.length >= MAX_THREADS
    job_cleanup
  end

  download_task = Thread.new do
    url_array.each { |url|
      uri = URI.parse(@large_image ? url + ":large" : url) 

      begin
        Net::HTTP.start(uri.host, uri.port, :use_ssl => uri.scheme.downcase == 'https') { |h|
          req = Net::HTTP::Get.new uri.request_uri
          h.request(req) { |res|
            case res
            when Net::HTTPOK
              fname = File.basename(url)

              puts "[fetch] remote: #{uri.path} => local: #{fname}"
              open(File.join(@dest, fname), "wb") { |file|
                res.read_body { |chunk| file.write(chunk) }
              }
            end
          }
        }
      rescue => e
        puts "[dlthread] exception from thread -> #{e.to_s}"
      end
    }
  end

  @pool.push download_task
end

#job_cleanup ⇒ Object 



60
61
62
63
64
65
66
67
68
 
# File 'lib/rbitter/dlthread.rb', line 60

def job_cleanup
  until @pool.empty?
    dlthrd = @pool.shift

    if dlthrd.join(5).nil?
      puts "[dlthread] #{dlthrd.to_s} is still running. (timeout: 5sec)"
    end
  end
end