Module: ZooniverseData::Helpers::Transport

Extended by:
ActiveSupport::Concern
Defined in:
lib/zooniverse_data/helpers/transport.rb

Defined Under Namespace

Modules: ClassMethods

Instance Method Summary collapse

Instance Method Details

#_with_retries(retries) ⇒ Object 



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# File 'lib/zooniverse_data/helpers/transport.rb', line 64

def _with_retries(retries)
  tries = 0
  begin
    yield
  rescue => e
    tries += 1
    if tries < retries
      retry
    else
      raise e
    end
  end
end

#bucket ⇒ Object 



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# File 'lib/zooniverse_data/helpers/transport.rb', line 38

def bucket
  @bucket ||= self.class.s3.bucket(bucket_name)
end

#bucket_name ⇒ Object 



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# File 'lib/zooniverse_data/helpers/transport.rb', line 42

def bucket_name
  @bucket_name ||= manifest.project.bucket
end

#bucket_path ⇒ Object 



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# File 'lib/zooniverse_data/helpers/transport.rb', line 46

def bucket_path
  @bucket_path ||= manifest.project.bucket_path
end

#download(from: nil, to: nil, timeout: 60) ⇒ Object 



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# File 'lib/zooniverse_data/helpers/transport.rb', line 15

def download(from: nil, to: nil, timeout: 60)
  _with_retries(20) do
    `rm -f '#{ to }'`
    spawn_with_timeout command: "wget '#{ from }' -t 50 -c -q -O '#{ to }'", timeout: timeout
    
    raise 'File not downloaded' unless File.exists?(to)
    raise 'File is empty' unless File.new(to).size > 0
  end
end

#spawn_with_timeout(command: nil, timeout: nil) ⇒ Object 



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# File 'lib/zooniverse_data/helpers/transport.rb', line 50

def spawn_with_timeout(command: nil, timeout: nil)
  pid = Process.spawn command, close_others: true
  
  begin
    Timeout::timeout(timeout) do
      Process.wait pid
    end
  rescue => e
    Process.kill 'TERM', pid
    Process.detach pid
    raise e
  end
end

#upload(from: nil, to: nil, content_type: nil) ⇒ Object 



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# File 'lib/zooniverse_data/helpers/transport.rb', line 25

def upload(from: nil, to: nil, content_type: nil)
  content_type ||= `file --brief --mime '#{ from }'`.chomp.split(';').first
  path = [bucket_path, to].compact.join('/').gsub(/^\//, '').gsub '//', '/'
  obj = bucket.object(path)

  _with_retries(20) do
    obj.upload_file(from, acl: 'public-read', content_type: content_type)
    raise 'File not uploaded' unless obj.exists?
  end
  
  path
end