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(options = {}, &block) ⇒ Http

Returns a new instance of Http.



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# File 'lib/down/http.rb', line 15

def initialize(options = {}, &block)
  if options.is_a?(HTTP::Client)
    warn "[Down] Passing an HTTP::Client object to Down::Http#initialize is deprecated and won't be supported in Down 5. Use the block initialization instead."
    options = options.default_options.to_hash
  end

  @method = options.delete(:method) || :get
  @client = HTTP
    .headers("User-Agent" => "Down/#{Down::VERSION}")
    .follow(max_hops: 2)
    .timeout(connect: 30, write: 30, read: 30)

  @client = HTTP::Client.new(@client.default_options.merge(options)) if options.any?
  @client = block.call(@client) if block
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 31

def download(url, max_size: nil, progress_proc: nil, content_length_proc: nil, destination: nil, **options, &block)
  response = request(url, **options, &block)

  content_length_proc.call(response.content_length) if content_length_proc && response.content_length

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

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

  stream_body(response) do |chunk|
    tempfile.write(chunk)
    chunk.clear # deallocate string

    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     = response.uri.to_s
  tempfile.headers = response.headers.to_h

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

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



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# File 'lib/down/http.rb', line 66

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

  Down::ChunkedIO.new(
    chunks:     enum_for(:stream_body, response),
    size:       response.content_length,
    encoding:   response.content_type.charset,
    rewindable: rewindable,
    data:       { status: response.code, headers: response.headers.to_h, response: response },
  )
end