Class: Down::Http

Inherits:
Backend show all
Defined in:
lib/down/http.rb

Defined Under Namespace

Modules: DownloadedFile

Instance Method Summary collapse

Methods inherited from Backend

download, open

Constructor Details

#initialize(client_or_options = {}) ⇒ Http

Returns a new instance of Http.



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# File 'lib/down/http.rb', line 17

def initialize(client_or_options = {})
  options = client_or_options.is_a?(HTTP::Client) ? client_or_options.default_options.to_hash : client_or_options

  @method  = options.delete(:method) || :get
  @options = {
    headers:         { "User-Agent" => "Down/#{Down::VERSION}" },
    follow:          { max_hops: 2 },
    timeout_class:   HTTP::Timeout::PerOperation,
    timeout_options: { write_timeout: 30, connect_timeout: 30, read_timeout: 30 }
  }.merge(options)
end

Instance Method Details

#download(url, max_size: nil, progress_proc: nil, content_length_proc: nil, destination: nil, **options, &block) ⇒ Object 



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# File 'lib/down/http.rb', line 29

def download(url, max_size: nil, progress_proc: nil, content_length_proc: nil, destination: nil, **options, &block)
  io = open(url, **options, rewindable: false, &block)

  content_length_proc.call(io.size) if content_length_proc && io.size

  if max_size && io.size && io.size > max_size
    raise Down::TooLarge, "file is too large (max is #{max_size/1024/1024}MB)"
  end

  extname  = File.extname(io.data[:response].uri.path)
  tempfile = Tempfile.new(["down-http", extname], binmode: true)

  until io.eof?
    chunk = io.readpartial(nil, buffer ||= String.new)

    tempfile.write(chunk)

    progress_proc.call(tempfile.size) if progress_proc

    if max_size && tempfile.size > max_size
      raise Down::TooLarge, "file is too large (max is #{max_size/1024/1024}MB)"
    end
  end

  tempfile.open # flush written content

  tempfile.extend Down::Http::DownloadedFile
  tempfile.url     = io.data[:response].uri.to_s
  tempfile.headers = io.data[:headers]

  download_result(tempfile, destination)
rescue
  tempfile.close! if tempfile
  raise
ensure
  io.close if io
end

#open(url, rewindable: true, **options, &block) ⇒ Object 



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# File 'lib/down/http.rb', line 67

def open(url, rewindable: true, **options, &block)
  response = request(url, **options, &block)

  response_error!(response) unless response.status.success?

  Down::ChunkedIO.new(
    chunks:     enum_for(:stream_body, response),
    size:       response.content_length,
    encoding:   response.content_type.charset,
    rewindable: rewindable,
    on_close:   (-> { response.connection.close } unless default_client.persistent?),
    data:       { status: response.code, headers: response.headers.to_h, response: response },
  )
end