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server.js
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server.js
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const instana = require('instana-nodejs-sensor');
// init tracing
// MUST be done before loading anything else!
instana({
tracing: {
enabled: true
}
});
const mongoClient = require('mongodb').MongoClient;
const mongoObjectID = require('mongodb').ObjectID;
const bodyParser = require('body-parser');
const express = require('express');
// MongoDB
var db;
var collection;
var mongoConnected = false;
const app = express();
app.use((req, res, next) => {
res.set('Timing-Allow-Origin', '*');
res.set('Access-Control-Allow-Origin', '*');
next();
});
app.use(bodyParser.urlencoded({ extended: true }));
app.use(bodyParser.json());
app.get('/health', (req, res) => {
var stat = {
app: 'OK',
mongo: mongoConnected
};
res.json(stat);
});
// all products
app.get('/products', (req, res) => {
if(mongoConnected) {
collection.find({}).toArray().then((products) => {
res.json(products);
}).catch((e) => {
console.log('ERROR', e);
res.status(500).send(e);
});
} else {
res.status(500).send('database not avaiable');
}
});
// product by SKU
app.get('/product/:sku', (req, res) => {
if(mongoConnected) {
collection.findOne({sku: req.params.sku}).then((product) => {
console.log('product', product);
if(product) {
res.json(product);
} else {
res.status(404).send('SKU not found');
}
}).catch((e) => {
console.log('ERROR', e);
res.status(500).send(e);
});
} else {
res.status(500).send('database not available');
}
});
// products in a category
app.get('/products/:cat', (req, res) => {
if(mongoConnected) {
collection.find({ categories: req.params.cat }).sort({ name: 1 }).toArray().then((products) => {
res.json(products);
}).catch((e) => {
console.log('ERROR', e);
res.status(500).send(e);
});
} else {
res.status(500).send('database not avaiable');
}
});
// all categories
app.get('/categories', (req, res) => {
if(mongoConnected) {
collection.distinct('categories').then((categories) => {
res.json(categories);
}).catch((e) => {
console.log('ERROR', e);
res.status(500).send(e);
});
} else {
res.status(500).send('database not available');
}
});
// search name and description
app.get('/search/:text', (req, res) => {
if(mongoConnected) {
collection.find({ '$text': { '$search': req.params.text }}).toArray().then((hits) => {
res.json(hits);
}).catch((e) => {
console.log('ERROR', e);
res.status(500).send(e);
});
} else {
res.status(500).send('database not available');
}
});
// set up Mongo
function mongoConnect() {
return new Promise((resolve, reject) => {
var mongoURL = process.env.MONGO_URL || 'mongodb://mongodb:27017/catalogue';
mongoClient.connect(mongoURL, (error, _db) => {
if(error) {
reject(error);
} else {
db = _db;
collection = db.collection('products');
resolve('connected');
}
});
});
}
function mongoLoop() {
mongoConnect().then((r) => {
mongoConnected = true;
console.log('MongoDB connected');
}).catch((e) => {
console.error('ERROR', e);
setTimeout(mongoLoop, 2000);
});
}
mongoLoop();
// fire it up!
const port = process.env.CATALOGUE_SERVER_PORT || '8080';
app.listen(port, () => {
console.log('Started on port', port);
});