title: Is there a validator for HTTP to show if my vendor's API is creating a poorly formed POST?
body: <p>I apologize if this isn't the right forum for this, but I couldn't figure out where this question fits in all the sites.  My vendor has an API for upload a file to a server, creating a POST with Content-Type: multipart/form-data.  My node.js express cannot parse the request, and when using other tools to generate upload requests the main difference I see, in Fiddler, is that there is one section between boundaries with absolutely no content.  E.g.:</p>
  
  <pre><code>POST /upload HTTP/1.1
  Content-Type: multipart/form-data; boundary=887c07d2-ff01-4eaa-b374-a807f9673742
  Cache-Control: no-cache
  Pragma: no-cache
  User-Agent: Java/1.7.0_15
  Host: 192.168.1.109:3000
  Accept: text/html, image/gif, image/jpeg, *; q=.2, */*; q=.2
  Connection: keep-alive
  Content-Length: 2539
  
  --887c07d2-ff01-4eaa-b374-a807f9673742
  --887c07d2-ff01-4eaa-b374-a807f9673742
  Content-Disposition: form-data; name="Filename"
  
  picture_178.jpg
  --887c07d2-ff01-4eaa-b374-a807f9673742
  Content-Disposition: form-data; name="folder"
  
  whatever
  --887c07d2-ff01-4eaa-b374-a807f9673742
  Content-Disposition: form-data; name="Filedata"; filename="picture_178.jpg"
  Content-Type: image/jpeg
  
  ......JFIF.....H.H.....C.........................................
  (etcetera)
  </code></pre>
  
  <p>I've looked at the relevant RFCs and I think this is not valid, but is there some tool to help me gain agreement on this to demonstrate to my vendor?  I know about the HTML validators, and other validators, but I couldn't find anything to validate the line protocol results.</p>
  
  <p>Thanks.</p>