diff --git a/Backend/README.rst b/Backend/README.rst index 21d0315..546acd5 100644 --- a/Backend/README.rst +++ b/Backend/README.rst @@ -1 +1,58 @@ -This code uses an Instagram API to acquire the number of followers from a specified user, then sends the data to an MQTT broker which passes it to an ESP-32 chip. +Documentazione del File Documentazione del File ======================= +Questo file contiene il codice per un'applicazione Node.js basata su Express, che periodicamente recupera il numero di follower da un profilo Instagram specificato, pubblica il conteggio attraverso MQTT e fornisce l'informazione al frontend tramite un'API REST. +Struttura del File ------------------ +Il file è diviso in due parti principali: la parte che gestisce le richieste Instagram e l'altra che gestisce le operazioni MQTT. +### Gestione Richieste Instagram #### Dipendenze - +`express`: framework per gestire le richieste HTTP - +`cors`: middleware per abilitare la condivisione di risorse tra origini diverse - +`path`: modulo per gestire i percorsi dei file - +`https`: modulo per effettuare richieste HTTPS - +`mqttClient`: modulo personalizzato per la gestione del protocollo MQTT - +`HttpsProxyAgent`: agente per gestire le richieste attraverso un proxy #### Variabili di Configurazione - +`proxyOptions`: URL del proxy (da configurare) #### Configurazione Express - +Inizializzazione dell'app Express e definizione della porta - +Abilitazione CORS per tutte le route - Servizio dei file statici dalla directory 'Frontend' #### +Configurazione Richiesta Instagram - +Definizione del nome utente Instagram da cui recuperare il conteggio dei follower - +Opzioni di richiesta per ottenere le informazioni del profilo Instagram +- Variabili per il conteggio dei follower e il conteggio precedente - +Funzione `fetchFollowerCount` per ottenere e pubblicare il conteggio dei follower tramite MQTT +- Chiamata periodica della funzione ogni 2 secondi tramite `setInterval` # +### Route Express - Una route `/getFollowerCount` per fornire il conteggio dei follower al frontend #### Avvio del Server Express - Avvio del server Express sulla porta specificata ### Gestione MQTT #### Dipendenze - +`mqtt`: modulo per la comunicazione MQTT #### Configurazione Connessione MQTT - +Parametri di connessione, come protocollo, host, porta, ID cliente, ecc. +- Creazione di un'istanza client MQTT e connessione al broker #### Eventi MQTT +- Gestione degli eventi `connect` e `message` per la connessione al broker e la ricezione di messaggi +#### Funzione di Pubblicazione MQTT - Funzione `publishMessage` per pubblicare un messaggio sul broker MQTT #### Esportazione della Funzione MQTT - Esportazione della funzione `publishMessage` per l'utilizzo esterno Utilizzo -------- 1. Configurare l'URL del proxy nella variabile `proxyOptions`. 2. Assicurarsi che le dipendenze siano installate eseguendo `npm install`. 3. Avviare l'applicazione eseguendo `node `. L'applicazione periodicamente recupera il conteggio dei follower da Instagram, lo pubblica tramite MQTT e fornisce l'informazione al frontend attraverso l'API REST. + La risposta JSON viene analizzata, e se il conteggio è cambiato rispetto al vecchio valore, viene pubblicato tramite MQTT. + +Intervallo di richiesta dei follower: La funzione per ottenere il conteggio dei follower viene chiamata ogni 10 secondi. + +Route per ottenere il conteggio dei follower: Viene definita una route che restituisce il conteggio dei follower . + +Avvio del server: Il server Express viene avviato sulla porta specificata + Gestione MQTT + + Dipendenze +- `mqtt`: modulo per la comunicazione MQTT + + Configurazione Connessione MQTT +- Parametri di connessione, come protocollo, host, porta, ID cliente, ecc. +- Creazione di un'istanza client MQTT e connessione al broker + +Eventi MQTT +- Gestione degli eventi `connect` e `message` per la connessione al broker e la ricezione di messaggi + +Funzione di Pubblicazione MQTT +- Funzione `publishMessage` per pubblicare un messaggio sul broker MQTT + +Esportazione della Funzione MQTT +- Esportazione della funzione `publishMessage` per l'utilizzo esterno + +Utilizzo + +1. Configurare l'URL del proxy nella variabile `proxyOptions`. +2. Assicurarsi che le dipendenze siano installate eseguendo `npm install`. +3. Avviare l'applicazione eseguendo `node `. + +L'applicazione periodicamente recupera il conteggio dei follower da Instagram, lo pubblica tramite MQTT e fornisce l'informazione al frontend attraverso l'API REST. diff --git a/Backend/Schema Backend.PNG b/Backend/Schema Backend.PNG new file mode 100644 index 0000000..60fc87c Binary files /dev/null and b/Backend/Schema Backend.PNG differ diff --git a/Backend/index.js b/Backend/index.js index 0f71943..7b8dd8c 100644 --- a/Backend/index.js +++ b/Backend/index.js @@ -1,24 +1,32 @@ // Import required modules -const express = require('express'); -const path = require('path'); -const https = require('https'); -const mqttClient = require('./mqtt'); +const express = require('express'); // Express framework for handling HTTP requests +const cors = require('cors'); // CORS middleware for enabling cross-origin resource sharing +const path = require('path'); // Path module for handling file paths +const https = require('https'); // HTTPS module for making secure requests +const mqttClient = require('./mqtt'); // Custom MQTT client module +const { HttpsProxyAgent } = require('https-proxy-agent'); + +const proxyOptions = ''; // Your Proxy URL goes here // Create an Express application const app = express(); -const port = process.env.PORT || 3000; +const port = process.env.PORT || 5500; // Use the port defined by the environment variable, defaulting to 5500 + +// Enable CORS for all routes +app.use(cors()); -// Serve static files (CSS, images, etc.) from a public directory -app.use(express.static(path.join(__dirname, 'public'))); +// Serve static files (CSS, images, etc.) from a frontend directory +app.use(express.static(path.join(__dirname, 'Frontend'))); // Define the Instagram username to fetch follower count for const username = "iismarconicivitavecchia"; -// Define the request options +// Define the request options for fetching Instagram profile information const options = { hostname: 'i.instagram.com', path: `/api/v1/users/web_profile_info/?username=${username}`, method: 'GET', + agent: new HttpsProxyAgent(proxyOptions), headers: { 'User-Agent': 'Instagram 76.0.0.15.395 Android (24/7.0; 640dpi; 1440x2560; samsung; SM-G930F; herolte; samsungexynos8890; en_US; 138226743)' } @@ -28,18 +36,22 @@ const options = { let oldFollowerCount = 0; let output; -// Function to fetch the follower count +// Function to fetch the follower count from Instagram function fetchFollowerCount() { const req = https.get(options, (res) => { let data = ''; + // Accumulate data as it is received res.on('data', (chunk) => { data += chunk; }); + // Process the complete response res.on('end', () => { try { + // Parse the JSON response from Instagram const jsonData = JSON.parse(data); + if (jsonData.data.user) { // Extract the follower count from the JSON response const followerCount = jsonData.data.user.edge_followed_by.count; @@ -63,22 +75,24 @@ function fetchFollowerCount() { }); }); + // Handle errors in the HTTPS request req.on('error', (error) => { console.error(error); }); + // Complete the request req.end(); } -// Call fetchFollowerCount every 10 seconds -setInterval(fetchFollowerCount, 10000); +// Call fetchFollowerCount every 2 seconds using setInterval +setInterval(fetchFollowerCount, 2000); // Define a route to send the follower count to the front end app.get('/getFollowerCount', (req, res) => { res.json({ followerCount: output || 'Loading...' }); }); -// Start the Express server +// Start the Express server and listen on the specified port app.listen(port, () => { console.log(`Server is running on http://localhost:${port}`); }); diff --git a/Backend/mqtt.js b/Backend/mqtt.js index e3d1fa6..f362f0c 100644 --- a/Backend/mqtt.js +++ b/Backend/mqtt.js @@ -10,16 +10,16 @@ const connectUrl = `${protocol}://${host}:${port}`; // Create an MQTT client instance and connect to the broker const client = mqtt.connect(connectUrl, { - clientId, - clean: true, - connectTimeout: 4000, - username: 'emqx', - password: 'public', - reconnectPeriod: 1000, + clientId, // Unique client ID for the MQTT connection + clean: true, // Clean session flag, ensuring no previous session data is used + connectTimeout: 4000, // Timeout for the connection attempt + username: 'emqx', // MQTT broker username + password: 'public', // MQTT broker password + reconnectPeriod: 1000, // Period to attempt reconnection if the connection is lost }); // Define the topic to subscribe to -const topic = 'IFC-Backend/1'; +const topic = ''; // Event handler when the client is successfully connected to the broker client.on('connect', () => { diff --git a/package-lock.json b/package-lock.json index 1bdc255..630bef3 100644 --- a/package-lock.json +++ b/package-lock.json @@ -5,7 +5,11 @@ "packages": { "": { "dependencies": { + "axios": "^1.6.2", + "cheerio": "^1.0.0-rc.12", + "cors": "^2.8.5", "express": "^4.18.2", + "https-proxy-agent": "^7.0.2", "mqtt": "^5.1.3" } }, @@ -57,11 +61,37 @@ "node": ">= 0.6" } }, + 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