Fix truncated chunked responses

lib/node-http-proxy/http-proxy.js

@@ -277,6 +277,20 @@ HttpProxy.prototype.proxyRequest = function (req, res, buffer) {
  if (!ended) { response.emit('end') }
  });
 
+ //
+ // After reading a chunked response, the underlying socket
+ // will hit EOF and emit a 'end' event, which will abort
+ // the request. If the socket was paused at that time,
+ // pending data gets discarded, truncating the response.
+ // This code makes sure that we flush pending data.
+ //
+ response.connection.on('end', function () {
+ if (response.readable && response.resume) {
+ {
+ response.resume();
+ }
+ });
+
  response.on('end', function () {
  ended = true;
  if (!errState) {
@@ -296,7 +310,12 @@ HttpProxy.prototype.proxyRequest = function (req, res, buffer) {
 
  function ondata(chunk) {
  if (res.writable) {
- if (false === res.write(chunk) && response.pause) {
+ // Only pause if the underlying buffers are full,
+ // *and* the connection is not in 'closing' state.
+ // Otherwise, the pause will cause pending data to
+ // be discarded and silently lost.
+ if (false === res.write(chunk) && response.pause
+ && response.connection.readable) {
  response.pause();
  }
  }