express backend

Vivian/modules/app.js

@@ -0,0 +1,67 @@
+
+const express = require("express");
+const helmet = require("helmet");
+
+const app = express();
+app.use(helmet());
+const port = 80;
+
+//disable x-powered-by header for security reasons
+app.disable("x-powered-by");
+
+app.use(express.json());
+app.set("json spaces", 2);
+
+
+//middleware logic ( called by next() )
+
+//app.use('/api/v0', require('../middleware/ApiKey.js'));
+a//pp.use('/api/v0', APIlogger, require('../routes/api_route.js'));
+
+//route logic
+//app.use("/api/v0", require("../routes/api_route.js"));
+
+
+
+// Catch 404 and forward to error handler. If none of the above routes are
+// used, this is what will be called.
+app.use(function (req, res, next) {
+	var err = new Error("Not Found");
+	err.message = "Page not found";
+	err.status = 404;
+	next(err);
+});
+
+// Error handler. This is where `next()` will go on error
+app.use(function(err, req, res, next) {
+	console.error(err.status || res.status, err.name, req.method, req.url);
+	if(![ 404].includes(err.status || res.status)){
+	  console.error(err.message);
+	  console.error(err.stack);
+	  console.error('=========================================');
+	}
+	
+	console.log(err.name + " validation error");
+	// Parse key error for Sequilzw
+	let keyErrors = {}
+	if(['SequelizeValidationError'].includes(err.name) && err.errors){
+		for(let item of err.errors){
+			if(item.path){
+				keyErrors[item.path] = item.message
+			}
+		}
+	}
+  
+	res.status(err.status || 500);
+	console.log(keyErrors);
+	res.json({
+	  name: err.name,
+	  message: err.message,
+	  keyErrors,
+	});
+  });
+app.listen(port, () => {
+	console.log(`app listening on port ${port}`);
+});
+
+module.exports = { app };