fix(Server): set tls.DEFAULT_ECDH_CURVE to 'auto' (#1531)

Author: nekolab

lib/Server.js

@@ -13,6 +13,7 @@ const fs = require('fs');
 constpath=require('path');
 
 constip=require('ip');
+consttls=require('tls');
 consturl=require('url');
 consthttp=require('http');
 consthttps=require('https');
@@ -40,6 +41,16 @@ const createCertificate = require('./utils/createCertificate');
 constvalidateOptions=require('schema-utils');
 constschema=require('./options.json');
 
+// Workaround for node ^8.6.0, ^9.0.0
+// DEFAULT_ECDH_CURVE is default to prime256v1 in these version
+// breaking connection when certificate is not signed with prime256v1
+// change it to auto allows OpenSSL to select the curve automatically
+// See https://github.com/nodejs/node/issues/16196 for more infomation
+constversion=parseFloat(process.version.slice(1));
+if(version>=8.6&&version<10){
+tls.DEFAULT_ECDH_CURVE='auto';
+}
+
 constSTATS={
 all: false,
 hash: true,
@@ -581,7 +592,7 @@ function Server (compiler, options = {}, _log) {
 // - https://github.com/nodejs/node/issues/21665
 // - https://github.com/webpack/webpack-dev-server/issues/1449
 // - https://github.com/expressjs/express/issues/3388
-if(+process.version.match(/^v(\d+)/)[1]>=10){
+if(version>=10){
 this.listeningApp=https.createServer(options.https,app);
 }else{
 this.listeningApp=spdy.createServer(options.https,app);