message

Author: rohan-paul

AWS_S3-1.png

@@ -0,0 +1,21 @@
+A simple boilerplate project to implement AWS S3 file upload functionality in a Node, React and Mongo app. Using Multer for uploading file.
+
+To launch this project in the local machine
+
+First start mongodb service with `sudo service mongod start` and then the following commands
+
+- Run `npm install`
+- Run `npm run dev`
+- Run `npm start`
+
+It will start the server at [http://localhost:3000/](http://localhost:3000/)
+
+### Most importantly remember to replace AWS S3's bucket_name, AWSAccessKeyId and AWSSecretKey wth your own. I have kept those keys of mine in the .env file in the project root, and which ofcourse have been put in the gitignore file so not be make them public.
+
+<img src="AWS_S3-1.png">
+
+<img src="app-running-in-localhost.png">
+
+This project was bootstrapped with [Create React App](https://github.com/facebook/create-react-app).
+
+[NOTE ONLY FOR ME - I HAVE TO ENTER ALL DETAILS IN .env FILE AGAIN AS I HAVE DELETED THE S3-BUCKET ]

README.md

@@ -0,0 +1,42 @@
+require("dotenv").config();
+const express = require("express");
+const path = require("path");
+const bodyParser = require("body-parser");
+const cors = require("cors");
+const fileUploadRoutes = require("./routes/fileUploadRoutes");
+const app = express();
+const config = require("./config/config");
+
+app.use(cors());
+
+// Replace the above three lines for connecting mongodb with the below single line
+config.connectDB();
+
+app.use(bodyParser.json());
+app.use(bodyParser.urlencoded({ extended: "false" }));
+
+app.use(express.static(path.join(__dirname, "build")));
+
+// make the '/api/document' browser url route to go to documentRoutes.js route file
+app.use("/api/document", fileUploadRoutes);
+
+// catch 404 and forward to error handler
+app.use(function(req, res, next) {
+  var err = new Error("Not Found");
+  err.status = 404;
+  next(err);
+});
+
+// error handler
+app.use(function(err, req, res, next) {
+  // set locals, only providing error in development
+  res.locals.message = err.message;
+  res.locals.error = req.app.get("env") === "development" ? err : {};
+
+  // render the error page
+  res.status(err.status || 500);
+  res.status(err.status || 500);
+  res.render("error");
+});
+
+module.exports = app;

app-running-in-localhost.png

@@ -0,0 +1,71 @@
+#!/usr/bin/env node
+
+require('dotenv').config();
+var app = require('../app');
+var debug = require('debug')('mean-app:server');
+var http = require('http');
+
+// Get port from environment and store in Express.
+var port = normalizePort(process.env.PORT || '8080');
+app.set('port', port);
+
+
+// Create HTTP server.
+var server = http.createServer(app);
+
+// Listen on provided port, on all network interfaces.
+server.listen(port);
+server.on('error', onError);
+server.on('listening', onListening);
+
+// Normalize a port into a number, string, or false.
+function normalizePort(val) {
+  var port = parseInt(val, 10);
+
+  if (isNaN(port)) {
+    // named pipe
+    return val;
+  }
+
+  if (port >= 0) {
+    // port number
+    return port;
+  }
+  return false;
+}
+
+
+// Event listener for HTTP server "error" event.
+function onError(error) {
+  if (error.syscall !== 'listen') {
+    throw error;
+  }
+
+  var bind = typeof port === 'string'
+    ? 'Pipe ' + port
+    : 'Port ' + port;
+
+  // handle specific listen errors with friendly messages
+  switch (error.code) {
+    case 'EACCES':
+      console.error(bind + ' requires elevated privileges');
+      process.exit(1);
+      break;
+    case 'EADDRINUSE':
+      console.error(bind + ' is already in use');
+      process.exit(1);
+      break;
+    default:
+      throw error;
+  }
+}
+
+
+// Event listener for HTTP server "listening" event.
+function onListening() {
+  var addr = server.address();
+  var bind = typeof addr === 'string'
+    ? 'pipe ' + addr
+    : 'port ' + addr.port;
+  debug('Listening on ' + bind);
+}

app.js

@@ -0,0 +1,16 @@
+'use strict'
+
+const mongoose = require('mongoose');
+
+module.exports = {
+    'database': process.env.MONGO_DB,
+
+    // connect function to create a mongoDB connection
+    'connectDB' : function () {
+        mongoose.connect(this.database)
+    },
+}
+// on mongo connection open event print a console statement
+mongoose.connection.on('open', function () {
+    console.log('Connected to Database (MongoDB) ');
+})

bin/www

@@ -0,0 +1,3 @@
+module.exports = {
+  'secret':'apauth'
+};

config/config.js

@@ -0,0 +1,24 @@
+const mongoose = require("mongoose");
+const Schema = mongoose.Schema;
+
+// library for handling autoincrement in mongoose
+// https://github.com/ramiel/mongoose-sequence
+const AutoIncrement = require("mongoose-sequence")(mongoose);
+
+let documentSchema = new Schema(
+  {
+    document_id: { type: Number, default: 0 },
+    description: { type: String },
+    fileLink: { type: String }
+  },
+  {
+    // createdAt,updatedAt fields are automatically added into records
+    timestamps: true
+  }
+);
+
+documentSchema.plugin(AutoIncrement, { inc_field: "document_id" });
+
+module.exports = mongoose.model("Document", documentSchema);
+
+/* The mongoose-sequence creates a commodity collection named 'counters' which keeps track of the auto-incremental number. So during development to reset the go_id back to 1, I just have to drop the counter collection by running db.counters.drop()  */