Handle cases where res.write throws

lib/node-http-proxy.js

@@ -513,9 +513,17 @@ HttpProxy.prototype.proxyRequest = function (req, res, options) {
 
  // For each data `chunk` received from the `reverseProxy`
  // `response` write it to the outgoing `res`.
+ // If the res socket has been killed already, then write()
+ // will throw. Nevertheless, try our best to end it nicely.
  response.on('data', function (chunk) {
- if (req.method !== 'HEAD') {
- res.write(chunk);
+ if (req.method !== 'HEAD' && res.writable) {
+ try {
+ res.write(chunk);
+ } catch (er) {
+ try {
+ res.end();
+ } catch (er) {}
+ }
  }
  });
 
@@ -909,4 +917,4 @@ HttpProxy.prototype.proxyWebSocketRequest = function (req, socket, head, options
  if (options.buffer && !errState) {
  options.buffer.resume();
  }
-};
+};