Fix issues with express benchmark and synchronize package.json with template

performance/benchmark_client_express.js

@@ -92,7 +92,9 @@ function BenchmarkClient(server_targets, channels, histogram_params,
   this.client_options = [];
 
   for (var i = 0; i < channels; i++) {
-    var new_options = _.assign({host: server_targets[i]}, options);
+    var host_port;
+    host_port = server_targets[i % server_targets.length].split(':')
+    var new_options = _.assign({hostname: host_port[0], port: +host_port[1]}, options);
     new_options.agent = new protocol.Agent(new_options);
     this.client_options[i] = new_options;
   }
@@ -172,7 +174,7 @@ BenchmarkClient.prototype.startClosedLoop = function(
     }
   }
 
-  startAllClients(_.assign(options, self.client_options),
+  startAllClients(_.map(self.client_options, _.partial(_.assign, options)),
                   outstanding_rpcs_per_channel, makeCall, self);
 };
 
@@ -236,7 +238,7 @@ BenchmarkClient.prototype.startPoisson = function(
 
   var averageIntervalMs = (1 / offered_load) * 1000;
 
-  startAllClients(_.assign(options, self.client_options),
+  startAllClients(_.map(self.client_options, _.partial(_.assign, options)),
                   outstanding_rpcs_per_channel, function(opts){
                     var p = PoissonProcess.create(averageIntervalMs, function() {
                       makeCall(opts, p);

performance/benchmark_server_express.js

@@ -46,15 +46,17 @@ var EventEmitter = require('events');
 var util = require('util');
 
 var express = require('express');
+var bodyParser = require('body-parser')
 
 function unaryCall(req, res) {
-  var reqObj = JSON.parse(req.body);
+  var reqObj = req.body;
   var payload = {body: '0'.repeat(reqObj.response_size)};
-  res.send(JSON.dumps(payload));
+  res.json(payload);
 }
 
 function BenchmarkServer(host, port, tls, generic, response_size) {
   var app = express();
+  app.use(bodyParser.json())
   app.put('/serviceProto.BenchmarkService.service/unaryCall', unaryCall);
   this.input_host = host;
   this.input_port = port;
@@ -78,7 +80,7 @@ util.inherits(BenchmarkServer, EventEmitter);
 BenchmarkServer.prototype.start = function() {
   var self = this;
   this.server.listen(this.input_port, this.input_hostname, function() {
-    this.last_wall_time = process.hrtime();
+    self.last_wall_time = process.hrtime();
     self.emit('started');
   });
 };

performance/worker_service_impl.js

@@ -140,7 +140,6 @@ module.exports = function WorkerServiceImpl(benchmark_impl, server) {
         console.log('ServerConfig %j', request.setup);
         server = new BenchmarkServer('[::]', request.setup.port,
                                      request.setup.security_params);
-        server.start();
         server.on('started', function() {
           stats = server.mark();
           call.write({
@@ -148,6 +147,7 @@ module.exports = function WorkerServiceImpl(benchmark_impl, server) {
             port: server.getPort()
           });
         });
+        server.start();
         break;
         case 'mark':
         if (server) {