title: Can't figure out how to read the data passed in from form data
body: <p>having trouble accessing a file I'm sending over in a formData object into node.  Code in coffeescript.  Sending:</p>
  
  <pre><code>formData = new FormData()
          formData.append("upload", file)
          $.ajax
              url: "/onboard/groups/csv"
              method: "POST"
              dataType: "json"
              cache: false
              data: formData
              contentType: false
              processData: false
              success: (data) -&gt;
                  console.log "OStore post-processed data: ", data
                  callback(null, data)
  </code></pre>
  
  <p>Receiving: </p>
  
  <pre><code>router.post "/onboard/groups/csv", (req, res, next) -&gt;
  file = req.files?['upload']?
  fs.readFile file, (err,data) -&gt;
      console.log err if err
      return file = data
  console.log "postfile: ", file
  </code></pre>
  
  <p>Not very experienced with fs but should I be doing something differently to access the file?  use path?  thanks for any help.  </p>