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 = nil) ⇒ Http 



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

def initialize(client_or_options = nil)
  options = client_or_options
  options = client_or_options.default_options if client_or_options.is_a?(HTTP::Client)

  @client = HTTP.headers("User-Agent" => "Down/#{Down::VERSION}").follow(max_hops: 2)
  @client = HTTP::Client.new(@client.default_options.merge(options)) if options
end

Instance Method Details

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



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# File 'lib/down/http.rb', line 25

def download(url, max_size: nil, progress_proc: nil, content_length_proc: 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?
    tempfile.write(io.readpartial)

    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]

  tempfile
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 61

def open(url, rewindable: true, **options, &block)
  begin
    response = get(url, **options, &block)
  rescue => exception
    request_error!(exception)
  end

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

  body_chunks = Enumerator.new do |yielder|
    begin
      response.body.each { |chunk| yielder << chunk }
    rescue => exception
      request_error!(exception)
    end
  end

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