Class: Webmachine::Streaming::IOEncoder Private

Inherits:
Encoder
  • Object
show all
Includes:
Enumerable
Defined in:
lib/webmachine/streaming/io_encoder.rb

Overview

This class is part of a private API. You should avoid using this class if possible, as it may be removed or be changed in the future.

Implements a streaming encoder for IO response bodies, such as File objects.

Constant Summary collapse

CHUNK_SIZE =

This constant is part of a private API. You should avoid using this constant if possible, as it may be removed or be changed in the future.

8192

Instance Attribute Summary

Attributes inherited from Encoder

#body, #charsetter, #encoder, #resource

Instance Method Summary collapse

Methods inherited from Encoder

#initialize

Constructor Details

This class inherits a constructor from Webmachine::Streaming::Encoder

Instance Method Details

#copy_stream(outstream) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

If IO#copy_stream is supported, and the stream is unencoded, optimize the output by copying directly. Otherwise, defers to using #each.

Parameters:

  • outstream (IO)

    the output stream to copy the body into


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# File 'lib/webmachine/streaming/io_encoder.rb', line 25

def copy_stream(outstream)
  if can_copy_stream?
    IO.copy_stream(body, outstream)
  else
    each {|chunk| outstream << chunk }
  end
end

#each {|chunk| ... } ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Iterates over the IO, encoding and yielding individual chunks of the response entity.

Yields:

  • (chunk)

Yield Parameters:

  • chunk (String)

    a chunk of the response, encoded


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# File 'lib/webmachine/streaming/io_encoder.rb', line 15

def each
  while chunk = body.read(CHUNK_SIZE) and chunk != ""
    yield resource.send(encoder, resource.send(charsetter, chunk))
  end
end

#empty?Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns:

  • (Boolean)

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# File 'lib/webmachine/streaming/io_encoder.rb', line 53

def empty?
  size == 0
end

#sizeFixnum Also known as: bytesize

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Returns the length of the IO stream, if known. Returns nil if the stream uses an encoder or charsetter that might modify the length of the stream, or the stream size is unknown.

Returns:

  • (Fixnum)

    the size, in bytes, of the underlying IO, or nil if unsupported


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# File 'lib/webmachine/streaming/io_encoder.rb', line 38

def size
  if is_unencoded?
    if is_string_io?
      body.size
    else
      begin
        body.stat.size
      rescue SystemCallError
        # IO objects might raise an Errno if stat is unsupported.
        nil
      end
    end
  end
end