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    <p>Well.. as i see it, this is a normal behaviour. I'll explain why. If you only have access to a Rack::Request,(i guess that) your middleware does not parse the response (you do not include something like <em>ActionController::ParamsParser</em>), so you don't have access to a hash of parameters, but to a StringIo. This StringIO corresponds to a stream <a href="http://www.w3.org/TR/html401/interact/forms.html#h-17.13.4.2" rel="nofollow noreferrer">like</a>:</p> <pre><code>Content-Type: multipart/form-data; boundary=AaB03x --AaB03x Content-Disposition: form-data; name="param1" value1 --AaB03x Content-Disposition: form-data; name="files"; filename="file1.txt" Content-Type: text/plain ... contents of file1.txt ... --AaB03x-- </code></pre> <p>What you are trying to do with the Net::HTTP class is to: (1). parse the request into a hash of parameters; (2). merge the parameters hash with your own parameters; (3). recreate the request. The problem is that Net::HTTP library can't do (1), since it is a client library, not a server one.</p> <p>Therefore, you can not escape parsing some how your request before adding the new parameters.</p> <p>Possible solutions:</p> <ol> <li><p>Insert ActionController::ParamsParser before your middleware. After that, you may use the excellent <a href="http://rdoc.info/projects/archiloque/rest-client" rel="nofollow noreferrer">rest-client</a> lib to do something like:</p> <p>RestClient.post ('<a href="http://your_server" rel="nofollow noreferrer">http://your_server</a>' + request.path_info), :params => params.merge(your_params)</p></li> <li><p>You can attempt to make a wrapper on the StringIO object, and add, at the end of stream,your own parameters. However, this is not trivial nor advisable. </p></li> </ol>
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    1. POPost request with body_stream and parameters
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    1. USVlad Zloteanu
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    1. COYeah I put away the second one. I'll try the first. Thanks :)
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      1. USDamien MATHIEU
    2. COYou're welcome :) However, by parsing the request this way, you must wait for the whole content to be uploaded to the proxy server. Therefore, the total_time > time_to_upload_to_proxy + time_to_upload_to_real_server.
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      1. USVlad Zloteanu
 

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