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var express = require("express"); var path = require("path"); var bodyParser = require("body-parser"); var mongodb = require("mongodb"); var ObjectID = mongodb.ObjectID; var CONTACTS_COLLECTION = "contacts"; var app = express(); app.use(express.static(__dirname + "/public")); app.use(bodyParser.json()); // Create a database variable outside of the database connection callback to reuse the connection pool in your app. var db; // Connect to the database before starting the application server. mongodb.MongoClient.connect(process.env.MONGODB_URI, function (err, database) { if (err) { console.log(err); process.exit(1); } // Save database object from the callback for reuse. db = database; console.log("Database connection ready"); // Initialize the app. var server = app.listen(process.env.PORT || 8080, function () { var port = server.address().port; console.log("App now running on port", port); }); });

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