Class: FunWith::Files::Downloader

Inherits:
Object
  • Object
show all
Defined in:
lib/fun_with/files/downloader.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.download(*args) ⇒ Object 



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# File 'lib/fun_with/files/downloader.rb', line 11

def self.download( *args )
  self.new.download( *args )
end

Instance Method Details

#download(url, io, opts = {}) ⇒ Object

options:

:md5 => <digest>  :  Running md5 on the downloaded file should result in an error
:sha256 => <digest> :



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# File 'lib/fun_with/files/downloader.rb', line 21

def download( url, io, opts = {} )
  @uri = URI.parse( url )
  @io  = io

  URI.open( url ) do |f|
    @io << f.read
  end
  
  io_path = @io.fwf_filepath
  
  if io_path.file?
    if io_path.valid_digest?( opts )
      true
    else
      warn( "File may not have downloaded correctly, or is validating against a bad hash #{io_path} #{opts.inspect}")
      false
    
    end
  else
    warn( "File did not download correctly, or was deleted: #{io_path}")
    false
  end
rescue StandardError => e
  handle_network_errors( e )
end

#handle_network_errors(e) ⇒ Object 



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# File 'lib/fun_with/files/downloader.rb', line 48

def handle_network_errors( e )
  raise e
rescue URI::InvalidURIError => e
  puts "Tried to get #{@uri.path} but failed with URI::InvalidURIError."
rescue OpenURI::HTTPError => e
  STDERR.write( "Couldn't fetch podcast info from #{@uri.path}\n" )
  STDERR.write( "#{e}\n\n" )
rescue SocketError => e
  STDERR.write( "Problem connecting to server (Socket error) when downloading #{@uri.path}." )
  STDERR.write( "#{e}\n\n" )
rescue URI::InvalidURIError => e
  STDERR.write( "URI::InvalidURIError for #{@uri.path}." )
  STDERR.write( "#{e}\n\n" )
  # this may be too broad a filter
  # TODO: retry?
rescue SystemCallError => e
  STDERR.write( "Problem connecting to server (System call error) when downloading #{@uri.path}" )
  STDERR.write( "#{e}\n\n" )
rescue OpenSSL::SSL::SSLError => e
  STDERR.write( "OpenSSL::SSL::SSLError while downloading #{@uri.path}" )
  STDERR.write( "#{e}\n\n" )
rescue Timeout::Error
  STDERR.write( "Timeout error connecting to #{@uri.path}" )
  STDERR.write( "#{e}\n\n" )
end