title: How to implement multipart file upload proxy using nodejs?
body: <p>We have implemented a proxy server for our main backend server which actually serve all requests using express-http-proxy npm package. This works fine for all request except multipart request, as multipart is not working with this. When i upload a small size file, it works fine as in that case body is redirected to main server once read completely.</p>
  
  <p>In case on multipart request it fails and nothing reaches backend server (as it is trying to load complete body before proxying). On exploration found this <a href="https://github.com/villadora/express-http-proxy/issues/127" rel="nofollow noreferrer">https://github.com/villadora/express-http-proxy/issues/127</a> which clearly says it is not supported.</p>
  
  <p>On further exploration found multer nodejs library which helps support save multipart file, but not sure how to use it for proxying multipart file request to backend server.</p>
  
  <p>Please give some direction of how to proceed on implementing "multipart file upload proxy" using nodejs.</p>