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Mike Garey

2011-May-09 07:27 UTC

Failure when posting an XML file to a rails metal app

I''m trying to write some rails metal code to handle a large XML file
post, but I''m receiving a 500 from my server.  If I use a POST but
don''t provide a file to upload, everything works and I receive a 200
response, but if I provide a file (the -d flag with curl), I receive a
500.  Here''s the curl command I''m using:

curl -siX POST http://large_file_tester/uploader  -d
@/home/mike/tmp/Product\ Upload\ Example\ XMLs/products.1000.xml
--header "Content-Type: application/xml"

and the response:

HTTP/1.1 100 Continue

HTTP/1.1 500 Internal Server Error
Date: Mon, 09 May 2011 07:24:35 GMT
Server: Apache/2.2.11 (Ubuntu) Phusion_Passenger/3.0.7
Vary: Accept-Encoding
Content-Length: 646
Connection: close
Content-Type: text/html; charset=iso-8859-1

<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 2.0//EN">
<html><head>
<title>500 Internal Server Error</title>
</head><body>
<h1>Internal Server Error</h1>
<p>The server encountered an internal error or
misconfiguration and was unable to complete
your request.</p>
<p>Please contact the server administrator,
 webmaster@localhost and inform them of the time the error occurred,
and anything you might have done that may have
caused the error.</p>
<p>More information about this error may be available
in the server error log.</p>
<hr>
<address>Apache/2.2.11 (Ubuntu) Phusion_Passenger/3.0.7 Server at
large_file_tester Port 80</address>
</body></html>


here''s my apache error log:

[ pid=31236 thr=140090706884944 file=ext/apache2/Hooks.cpp:865
time=2011-05-09 17:08:44.35 ]: Unexpected error in mod_passenger: An
error occured while sending the request body to the request handler:
Broken pipe (32)
  Backtrace:
     (empty)

and here''s the rails metal code:


# Allow the metal piece to run in isolation
require(File.dirname(__FILE__) + "/../../config/environment") unless
defined?(Rails)

class Uploader
  def self.call(env)
    if env["PATH_INFO"] =~ /^\/uploader/
      request = Rack::Request.new(env)
      if request.post?
        RAILS_DEFAULT_LOGGER.warn("UPLOAD RECEIVED. params:
#{request.params.inspect}")
        return [200,{"Content-Type" =>
"text/html"},["Upload success"]]
      end
      return [200, {"Content-Type" => "text/html"},
["Hello, World!"]]
    else
      return[404, {"Content-Type" => "text/html"},
["Not Found"]]
    end
  end
end


Anyone have any suggestions? Thanks,

Mike

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David Paschich

2011-May-09 14:40 UTC

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Re: Failure when posting an XML file to a rails metal app

To really get to the bottom of it we''ll need to see your rails error
logs,
but one thing you can try is using --data-binary instead of -d in your curl 
command line. That''s tripped me up on many occasions working with XML.

-David

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