Update Koa and fix response headers

frameworks/JavaScript/koa/app.js

@@ -80,16 +80,19 @@ if (cluster.isMaster) {
 
   // Route handlers
   function *jsonHandler() {
+    this.set('Server', 'Koa');
     this.body = {
       message: "Hello, world!"
     }
   }
 
   function *dbHandler() {
+    this.set('Server', 'Koa');
     this.body = yield worldQuery;
   }
 
   function *queriesHandler() {
+    this.set('Server', 'Koa');
     var numOfQueries = validateParam(this.query.queries);
     var queries = [];
     for (var i = 0; i < numOfQueries; i++) {
@@ -112,6 +115,7 @@ if (cluster.isMaster) {
   }
 
   function *updateHandler() {
+    this.set('Server', 'Koa');
     var numOfUpdates = validateParam(this.query.queries);
     var queries = [];
     for (var i = 0; i < numOfUpdates; i++) {
@@ -121,6 +125,7 @@ if (cluster.isMaster) {
   }
 
   function *textHandler() {
+    this.set('Server', 'Koa');
     this.body = 'Hello, world!';
   }
 

frameworks/JavaScript/koa/setup.sh

@@ -6,8 +6,8 @@ export NVM_HOME=${IROOT}/nvm
 # Used to avoid nvm's return 2 error.
 # Sourcing this functions if 0 is returned.
 source $NVM_HOME/nvm.sh || 0
-nvm install 0.11.16
-nvm use 0.11.16
+nvm install 0.12.2
+nvm use 0.12.2
 
 # update npm before app init
 npm install -g npm