restore ws functionality to webserver

lib/modules/blockchain_process/blockchain.js

@@ -343,7 +343,7 @@ Blockchain.prototype.initChainAndGetAddress = function(callback) {
 };
 
 var BlockchainClient = function(blockchainConfig, client, env, onReadyCallback, onExitCallback) {
-  const isDev = !!blockchainConfig.isDev;
+  const isDev = Boolean(blockchainConfig.isDev);
   // TODO add other clients at some point
   if (client === 'geth') {
     return new Blockchain({blockchainConfig, client: GethCommands, env, isDev, onReadyCallback, onExitCallback});

lib/modules/webserver/server.js

@@ -1,10 +1,10 @@
 const async = require('async');
 let serveStatic = require('serve-static');
 const {canonicalHost, defaultHost, dockerHostSwap} = require('../../utils/host');
+const expressWebSocket = require('express-ws');
 const express = require('express');
 const fs = require('../../core/fs');
 require('http-shutdown').extend();
-const webSocket = require('ws');
 
 class Server {
   constructor(options) {
@@ -18,6 +18,7 @@ class Server {
   }
 
   start(callback) {
+    const self = this;
     if (this.server && this.server.listening) {
       let message = __("a webserver is already running at") + " " +
           ("http://" + canonicalHost(this.hostname) +
@@ -33,17 +34,14 @@ class Server {
     this.app.use(main);
     this.app.use('/coverage', coverage);
     this.app.use(coverageStyle);
-    
-    //this.wss = new webSocket.Server({server: this.server});
-    //this.events.on('outputDone', () => {
-    //  this.wss.clients.forEach((ws) => {
-    //    if (ws.readyState === webSocket.OPEN) {
-    //      ws.send('outputDone');
-    //    }
-    //  });
-    //});
 
-    const self = this;
+    expressWebSocket(this.app);
+
+    this.app.ws('/', function(ws, _req) {
+      self.events.on('outputDone', () => {
+        ws.send('outputDone');
+      });
+    });
 
     async.waterfall([
       function createPlaceholderPage(next) {

npm-shrinkwrap.json

@@ -3489,6 +3489,24 @@
         }
       }
     },
+    "express-ws": {
+      "version": "4.0.0",
+      "resolved": "https://registry.npmjs.org/express-ws/-/express-ws-4.0.0.tgz",
+      "integrity": "sha512-KEyUw8AwRET2iFjFsI1EJQrJ/fHeGiJtgpYgEWG3yDv4l/To/m3a2GaYfeGyB3lsWdvbesjF5XCMx+SVBgAAYw==",
+      "requires": {
+        "ws": "^5.2.0"
+      },
+      "dependencies": {
+        "ws": {
+          "version": "5.2.2",
+          "resolved": "https://registry.npmjs.org/ws/-/ws-5.2.2.tgz",
+          "integrity": "sha512-jaHFD6PFv6UgoIVda6qZllptQsMlDEJkTQcybzzXDYM1XO9Y8em691FGMPmM46WGyLU4z9KMgQN+qrux/nhlHA==",
+          "requires": {
+            "async-limiter": "~1.0.0"
+          }
+        }
+      }
+    },
     "extend": {
       "version": "3.0.2",
       "resolved": "https://registry.npmjs.org/extend/-/extend-3.0.2.tgz",
@@ -11076,14 +11094,6 @@
         }
       }
     },
-    "ws": {
-      "version": "6.0.0",
-      "resolved": "https://registry.npmjs.org/ws/-/ws-6.0.0.tgz",
-      "integrity": "sha512-c2UlYcAZp1VS8AORtpq6y4RJIkJ9dQz18W32SpR/qXGfLDZ2jU4y4wKvvZwqbi7U6gxFQTeE+urMbXU/tsDy4w==",
-      "requires": {
-        "async-limiter": "~1.0.0"
-      }
-    },
     "xhr": {
       "version": "2.5.0",
       "resolved": "https://registry.npmjs.org/xhr/-/xhr-2.5.0.tgz",

package.json

@@ -46,20 +46,20 @@
     "eth-ens-namehash": "2.0.8",
     "eth-lib": "0.2.8",
     "ethereumjs-wallet": "0.6.0",
-    "express": "4.16.3",
-    "file-loader": "1.1.11",
-    "finalhandler": "1.1.1",
-    "flatted": "0.2.3",
-    "follow-redirects": "1.5.7",
-    "fs-extra": "2.1.2",
-    "ganache-cli": "6.1.8",
-    "glob": "7.1.3",
-    "globule": "1.2.1",
-    "hard-source-webpack-plugin": "0.11.2",
-    "hosted-git-info": "2.7.1",
-    "http-proxy": "1.17.0",
-    "http-shutdown": "1.2.0",
-    "i18n": "0.8.3",
+    "express": "^4.16.3",
+    "express-ws": "^4.0.0",
+    "file-loader": "^1.1.5",
+    "finalhandler": "^1.1.1",
+    "flatted": "^0.2.3",
+    "follow-redirects": "^1.2.4",
+    "fs-extra": "^2.0.0",
+    "ganache-cli": "^6.1.6",
+    "glob": "^7.1.2",
+    "globule": "^1.1.0",
+    "hard-source-webpack-plugin": "^0.11.1",
+    "http-proxy": "^1.17.0",
+    "http-shutdown": "^1.2.0",
+    "i18n": "^0.8.3",
     "ipfs-api": "17.2.4",
     "is-valid-domain": "0.0.5",
     "istanbul": "0.4.5",