From: Brian Candler <B.Candler@...>
Date: 2007-03-29T04:33:46+09:00
Subject: Re: http.post dropping trailing '}'

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On Wed, Mar 28, 2007 at 08:04:00AM +0900, Wilson Chen wrote:
> I am making a call through http.post in Ruby 1.8.5.
> 
> uri = ...
> data = '{}'
> headers = ...
> http.post(uri, data, headers)
> 
> Everything seems to work except that the trailing '}' in data is not
> getting posted, as determined by the network analyzer WireShark.  My
> entire posted data is just '{'.  Is there some sort of sanitization or
> choping that I am unaware of?

Attached is a test case which proves everything is working OK, for me
anyway:

$ ruby posttest.rb
Listening on port 38449
<< request >>
POST /foo/bar HTTP/1.1
Accept: */*
Content-Type: text/plain
Content-Length: 2
Host: 127.0.0.1:38449

<< end headers >>
"{}"
Response: #<Net::HTTPServerError 500 Go away readbody=true>

This is ruby 1.8.4 (2005-12-24) [i486-linux] under Ubuntu 6.06

So I think you're probably misinterpreting your wireshark output, in which
case maybe you should post it. Better still, post tcpdump -s0 -X -n output.

Regards,

Brian.

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require 'socket'

module Demo
class SimpleServer

  attr_reader :thread, :server

  def port
    af, port, host, addr = @server.addr
    return port
  end

  def initialize(opt = {}, &blk)
    @server = TCPServer.new(opt[:addr] || '127.0.0.1', opt[:port])
    @logger = opt[:logger] || $stderr
    @call = blk || opt[:call] || (raise "No block or :call given")
    @thread = nil
    start
  end

  def start
    @thread ||= Thread.new do
      while sock = @server.accept
        Thread.new(sock) do |s|
          begin
            @call.call(s)
          rescue Exception => e
            @logger << "Exception: #{e}\n#{e.backtrace.join("\n")}\n"
          ensure
            s.close rescue nil
          end
        end
      end
    end
  end

  def stop
    @thread.kill if @thread
  rescue ThreadError
  ensure
    @thread = nil
  end
end # TCPServer
end # Demo

if __FILE__ == $0
ss = Demo::SimpleServer.new do |s|
  $stderr.puts "<< request >>"
  len = 0
  while line = s.gets
    $stderr.puts line
    len = $1.to_i if /^content-length: *(\d+)/i =~ line
    break if /^\s*$/ =~ line
  end
  $stderr.puts "<< end headers >>"
  body = s.read(len)
  $stderr.puts body.inspect
  s.puts "HTTP/1.0 500 Go away"
end
port = ss.port
$stderr.puts "Listening on port #{port}"

require 'net/http'
Net::HTTP.start('127.0.0.1', port) do |http|
  data = '{}'
  headers = { 'Content-Type' => 'text/plain' }
  resp = http.post('/foo/bar', data, headers)
  $stderr.puts "Response: #{resp.inspect}"
end

ss.stop
end # if __FILE__ == $0

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