It seems like WEBrick still doesn't allow POST/PUT requests with empty body, but the difference now is that the server doesn't respond with a 411, instead the request is blocked forever because the server gets stuck at the eof call here:

Line 525 in cda6d40

elsif BODY_CONTAINABLE_METHODS.member?(@request_method) && !@socket.eof

I can repro with this script:

require 'webrick'

class Simple < WEBrick::HTTPServlet::AbstractServlet
  def do_GET(req, res)
    puts "Hello world!"
    res.status = 200
    res.body = "Hello world!"
  end

  alias do_POST do_GET
end
server = WEBrick::HTTPServer.new(Port: 9988)                                                                                                                                                                                                                                    server.logger.level = 5
server.mount '/', Simple
server.start

And:

~ » curl -X POST --verbose localhost:9988
*   Trying 127.0.0.1:9988...
* TCP_NODELAY set
* Connected to localhost (127.0.0.1) port 9988 (#0)
> POST / HTTP/1.1
> Host: localhost:9988
> User-Agent: curl/7.68.0
> Accept: */*
>
# blocks forever; I have to Ctrl+C it

Edit:

My use-case is I have a web service whose job is to generate a bunch of config files. I'd like to have an endpoint that I can POST to to make the service regenerate the config files. It doesn't need any data from the client to do its job so the POST request will have an empty body.

PUT&POST - do not require length #30

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