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MongoClient Server Code
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| module.exports = { | |
| env: { | |
| browser: true, | |
| es6: true, | |
| node: true, | |
| }, | |
| extends: ["eslint:recommended", "prettier"], | |
| parserOptions: { | |
| ecmaVersion: "latest", | |
| sourceType: "module", | |
| ecmaFeatures: { | |
| jsx: true, | |
| }, | |
| }, | |
| rules: { | |
| indent: ["error", 2, { SwitchCase: 1 }], | |
| "linebreak-style": ["error", "unix"], | |
| quotes: ["error", "double"], | |
| semi: ["error", "always"], | |
| "no-console": 0, | |
| }, | |
| }; |
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| .DS_Store | |
| node_modules/** |
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| Boilerplate code for helping connecting to Mongo locally from Observable, as detailed on this Notebook https://observablehq.com/@kasivisu4/mongodb-local |
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| import { MongoClient } from "mongodb"; | |
| function MyMongoDB() { | |
| const myDB = {}; | |
| let client; | |
| myDB.init = async (url) => { | |
| try { | |
| client = new MongoClient(url); | |
| await client.connect(); | |
| return { success: true }; | |
| } catch (err) { | |
| console.log(err); | |
| return { success: false }; | |
| } | |
| }; | |
| myDB.find = async (dbName, collectionName, query = {}) => { | |
| try { | |
| const db = client.db(dbName); | |
| const collection = db.collection(collectionName); | |
| let res = await collection.find(query).toArray(); | |
| return res; | |
| } catch (err) { | |
| console.error(err); | |
| return err; | |
| } | |
| }; | |
| myDB.insert = async (dbName, collectionName, data = {}) => { | |
| try { | |
| const db = client.db(dbName); | |
| const collection = await db.collection(collectionName); | |
| console.log(data); | |
| let res = await collection.insertMany(data); | |
| return res; | |
| } catch (err) { | |
| console.error(err); | |
| return err; | |
| } | |
| }; | |
| myDB.delete = async (dbName, collectionName, query = {}) => { | |
| try { | |
| const db = client.db(dbName); | |
| const collection = db.collection(collectionName); | |
| let res = await collection.deleteMany(query); | |
| return res; | |
| } catch (err) { | |
| console.error(err); | |
| return err; | |
| } | |
| }; | |
| myDB.closeConnection = async () => { | |
| client.close(); | |
| }; | |
| return myDB; | |
| } | |
| export const databaseManager = MyMongoDB(); |
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| { | |
| "name": "mongolocal", | |
| "version": "1.0.0", | |
| "description": "", | |
| "main": "mongoDBClient.js", | |
| "type": "module", | |
| "scripts": { | |
| "test": "echo \"Error: no test specified\" && exit 1", | |
| "start": "node ./node_modules/nodemon/bin/nodemon.js server.js" | |
| }, | |
| "keywords": [], | |
| "author": "", | |
| "license": "ISC", | |
| "dependencies": { | |
| "cors": "^2.8.5", | |
| "express": "^4.18.2", | |
| "mongodb": "^5.2.0", | |
| "nodemon": "^2.0.22" | |
| }, | |
| "devDependencies": { | |
| "eslint": "^8.37.0", | |
| "eslint-config-prettier": "^8.8.0", | |
| "prettier": "^2.8.7" | |
| } | |
| } |
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| import express from "express"; | |
| import { databaseManager } from "./mongoDBClient.js"; | |
| import bodyParser from "body-parser"; | |
| import cors from "cors"; | |
| const app = express(); | |
| let corsOptions = { | |
| origin: function (origin, callback) { | |
| // Accept connections from Observable | |
| if (origin.endsWith("static.observableusercontent.com")) { | |
| callback(null, true) | |
| } else { | |
| callback(new Error('Not allowed by CORS')) | |
| } | |
| } | |
| } | |
| app.use(cors(corsOptions)); | |
| app.use(bodyParser.urlencoded({ extended: true })); | |
| app.use(bodyParser.json()); | |
| const PORT = 5001; | |
| app.post("/api/init", async (req, res) => { | |
| let body = req.body; | |
| console.log(body); | |
| let { url } = body; | |
| console.log("Received init request", url); | |
| let result = await databaseManager.init(url); | |
| res.status(200).json(result); | |
| }); | |
| app.post("/api/insert", async (req, res) => { | |
| let { db, collection, data } = req.body; | |
| console.log("Received Insert request", db, collection, data); | |
| let result = await databaseManager.insert(db, collection, data); | |
| res.status(200).json(result); | |
| }); | |
| app.post("/api/find", async (req, res) => { | |
| let { db, collection, query } = req.body; | |
| console.log("Received Find request", db, collection, query); | |
| let result = await databaseManager.find(db, collection, query); | |
| res.status(200).json(result); | |
| }); | |
| app.get("/api/closeConnection", async (req, res) => { | |
| console.log("Received Close Connection request"); | |
| let result = await databaseManager.closeConnection(); | |
| res.status(200).json(result); | |
| }); | |
| app.post("/api/delete", async (req, res) => { | |
| let { db, collection, query } = req.body; | |
| console.log("Received Find request", db, collection, query); | |
| let result = await databaseManager.delete(db, collection, query); | |
| res.status(200).json(result); | |
| }); | |
| // app.get("/api/delete", async (req, res) => { | |
| // let body = req.body; | |
| // console.log("Received Delete request", body); | |
| // let result = await databaseManager.delete(); | |
| // res.status(200).json(result); | |
| // }); | |
| app.listen(PORT, console.log(`Mongodb Server running on port ${PORT}`)); |
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