updates

5-network/05-fetch-crossorigin/demo.view/server.js

@@ -0,0 +1,31 @@
+const Koa = require('koa');
+const app = new Koa();
+
+const Router = require('koa-router');
+
+let router = new Router();
+
+router.get('/script', async (ctx) => {
+  let callback = ctx.query.callback;
+
+  if (!callback) {
+    ctx.throw(400, 'Callback required!');
+  }
+
+  ctx.type = 'application/javascript';
+  ctx.body = `${callback}({
+    temperature: 25,
+    humidity: 78
+  })`;
+});
+
+app
+  .use(router.routes())
+  .use(router.allowedMethods());
+
+
+if (!module.parent) {
+  http.createServer(app.callback()).listen(8080);
+} else {
+  exports.accept = app.callback();
+}