Emit drain if it doesn't happen on its own in 100ms

lib/node-http-proxy.js

@@ -551,10 +551,14 @@ HttpProxy.prototype.proxyRequest = function (req, res, options) {
         }
       }
       if (!flushed) {
+        //console.error('backpressure 554');
         response.pause();
         res.once('drain', function () {
           response.resume();
         });
+        setTimeout(function () {
+          res.emit('drain');
+        }, 100);
       }
     });
 
@@ -587,10 +591,14 @@ HttpProxy.prototype.proxyRequest = function (req, res, options) {
     if (!errState) {
       var flushed = reverseProxy.write(chunk);
       if (!flushed) {
+        //console.error('backpressure 594');
         req.pause();
         reverseProxy.once('drain', function () {
           req.resume();
         });
+        setTimeout(function () {
+          reverseProxy.emit('drain');
+        }, 100);
       }
     }
   });
@@ -661,10 +669,14 @@ HttpProxy.prototype._forwardRequest = function (req) {
   req.on('data', function (chunk) {
     var flushed = forwardProxy.write(chunk);
     if (!flushed) {
+      //console.error('backpressure 672');
       req.pause();
       forwardProxy.once('drain', function () {
         req.resume();
       });
+      setTimeout(function () {
+        forwardProxy.emit('drain');
+      }, 100);
     }
   })
 
@@ -762,10 +774,14 @@ HttpProxy.prototype.proxyWebSocketRequest = function (req, socket, head, options
           self.emit('websocket:outgoing', req, socket, head, data);
           var flushed = reverseProxy.incoming.socket.write(data);
           if (!flushed) {
+            //console.error('backpressure 777');
             proxySocket.pause();
             reverseProxy.incoming.socket.once('drain', function () {
               proxySocket.resume();
             });
+            setTimeout(function () {
+              reverseProxy.incoming.socket.emit('drain');
+            }, 100);
           }
         }
         catch (e) {
@@ -785,10 +801,14 @@ HttpProxy.prototype.proxyWebSocketRequest = function (req, socket, head, options
         self.emit('websocket:incoming', reverseProxy, reverseProxy.incoming, head, data);
         var flushed = proxySocket.write(data);
         if (!flushed) {
+          //console.error('backpressure 804');
           reverseProxy.incoming.socket.pause();
           proxySocket.once('drain', function () {
             reverseProxy.incoming.socket.resume();
           });
+          setTimeout(function () {
+            proxySocket.emit('drain');
+          }, 100);
         }
       }
       catch (e) {
@@ -951,10 +971,14 @@ HttpProxy.prototype.proxyWebSocketRequest = function (req, socket, head, options
         socket.write(sdata);
         var flushed = socket.write(data);
         if (!flushed) {
+          //console.error('backpressure 974');
           reverseProxy.socket.pause();
           socket.once('drain', function () {
             reverseProxy.socket.resume();
           });
+          setTimeout(function () {
+            socket.emit('drain');
+          }, 100);
         }
 
       }