related

# sinatra app
require 'rubygems'
require 'sinatra'

post "/" do
  p request
  p params
  "OK"
end

run Sinatra::Application

# command
curl -vvv --data-binary @test_body.xml -H 'Content-Type: Multipart/Related; boundary=parts;' http://localhost:3000/

# test_body.xml
--parts
Content-Type: text/xml
Content-ID: <message-1>

<a>foo</a>

--parts
Content-Type: text/xml
Content-ID: <message-2>

<b>bar</b>

--parts--

# output from running:
#<Sinatra::Request:0x10159b170 @env={"HTTP_ACCEPT"=>"*/*", "HTTP_HOST"=>"localhost:3000", "SERVER_NAME"=>"localhost", "rack.url_scheme"=>"http", "CONTENT_LENGTH"=>"146", "HTTP_USER_AGENT"=>"curl/7.19.7 (universal-apple-darwin10.0) libcurl/7.19.7 OpenSSL/0.9.8l zlib/1.2.3", "REQUEST_PATH"=>"/", "SERVER_PROTOCOL"=>"HTTP/1.1", "CONTENT_TYPE"=>"Multipart/Related; boundary=parts;", "rack.errors"=>#<IO:0x1001c9b88>, "async.callback"=>#<Method: Thin::Connection#post_process>, "REMOTE_ADDR"=>"127.0.0.1", "PATH_INFO"=>"/", "rack.run_once"=>false, "rack.version"=>[1, 0], "SERVER_SOFTWARE"=>"thin 1.2.7 codename No Hup", "SCRIPT_NAME"=>"", "HTTP_VERSION"=>"HTTP/1.1", "rack.multithread"=>false, "rack.request.form_vars"=>"--parts\nContent-Type: text/xml\nContent-ID: <message-1>\n\n<a>foo</a>\n\n--parts\nContent-Type: text/xml\nContent-ID: <message-2>\n\n<b>bar</b>\n\n--parts--\n", "REQUEST_URI"=>"/", "rack.multiprocess"=>false, "rack.request.query_hash"=>{"--parts\nContent-Type: text/xml\nContent-ID: <message-1>\n\n<a>foo</a>\n\n--parts\nContent-Type: text/xml\nContent-ID: <message-2>\n\n<b>bar</b>\n\n--parts--\n"=>nil}, "rack.request.form_input"=>#<StringIO:0x10159d6a0>, "SERVER_PORT"=>"3000", "async.close"=>#<EventMachine::DefaultDeferrable:0x10159cac0>, "REQUEST_METHOD"=>"POST", "rack.request.query_string"=>"", "rack.request.form_hash"=>{"--parts\nContent-Type: text/xml\nContent-ID: <message-1>\n\n<a>foo</a>\n\n--parts\nContent-Type: text/xml\nContent-ID: <message-2>\n\n<b>bar</b>\n\n--parts--\n"=>nil}, "QUERY_STRING"=>"", "GATEWAY_INTERFACE"=>"CGI/1.2", "rack.input"=>#<StringIO:0x10159d6a0>}>
{"--parts\nContent-Type: text/xml\nContent-ID: <message-1>\n\n<a>foo</a>\n\n--parts\nContent-Type: text/xml\nContent-ID: <message-2>\n\n<b>bar</b>\n\n--parts--\n"=>nil}