[ruby-core:49726] [ruby-trunk - Feature #5461] Add pipelining to Net::HTTP

Issue #5461 has been updated by mame (Yusuke Endoh).

Target version changed from 2.0.0 to next minor


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Feature #5461: Add pipelining to Net::HTTP
https://bugs.ruby-lang.org/issues/5461#change-33271

Author: drbrain (Eric Hodel)
Status: Assigned
Priority: Normal
Assignee: naruse (Yui NARUSE)
Category: lib
Target version: next minor


=begin
The attached patch adds HTTP/1.1 pipelining support to Net::HTTP.

Pipelining is only performed on HTTP/1.1 servers.  Net::HTTP will check if the server supports pipelining by using the first request in the list.  The user can override this via setting  (({http.pipelining = true})).

If a server does not support pipelining or there is an error during pipelining an error will be raised that contains the requests that not have been delivered yet and the responses that have been received.

The patch includes documentation explaining the fine details.

Example:

  requests = []
  requests << Net::HTTP::Get.new('/images/bug.png')
  requests << Net::HTTP::Get.new('/images/date.png')
  requests << Net::HTTP::Get.new('/images/find.png')

  http = Net::HTTP.new 'localhost'
  http.start do
    http.pipeline requests do |req, res|
      open File.basename(req.path), 'wb' do |io|
        io.write res.body
      end
    end
  end

Implementation notes:

* The current Net::HTTP tests make it very difficult to test bad behavior by servers.  In test/net/http/utils.rb I introduced a method to replace Net::BufferedIO with a subclass that can behave incorrectly.
* Net::HTTP#pipeline does not fall back to sending requests one-by-one for HTTP/1.1 servers.  I think this is acceptable as the user can use existing Net::HTTP code to send requests one-by-one.

=end



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