feat: Update SMTP transport to use API key for authentication and improve error handling
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4 changed files with 169 additions and 331 deletions
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@ -1,210 +0,0 @@
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#!/usr/bin/env ts-node
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/**
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* Bulk email sending example using Nodemailer transport
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*/
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import nodemailer from 'nodemailer';
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import { createTransport } from '../src/index';
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async function bulkEmailExample() {
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console.log('Bulk Email Example using SMTP WebSocket Transport\n');
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// Create the WebSocket transport
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const transport = createTransport({
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host: 'localhost',
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port: 3000,
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auth: {
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user: 'your-api-key-here'
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},
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maxQueueSize: 1000, // Handle large queues
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debug: false // Disable debug for bulk operations
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});
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const transporter = nodemailer.createTransporter(transport);
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// Sample recipient list
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const recipients = [
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{ email: 'user1@example.com', name: 'User One' },
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{ email: 'user2@example.com', name: 'User Two' },
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{ email: 'user3@example.com', name: 'User Three' },
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{ email: 'user4@example.com', name: 'User Four' },
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{ email: 'user5@example.com', name: 'User Five' }
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];
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console.log(`Sending emails to ${recipients.length} recipients...\n`);
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const results = [];
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const startTime = Date.now();
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// Send emails concurrently (transport handles queuing automatically)
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const emailPromises = recipients.map(async (recipient, index) => {
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try {
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const info = await transporter.sendMail({
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from: 'newsletter@example.com',
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to: recipient.email,
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subject: `Newsletter #${index + 1} - ${new Date().toLocaleDateString()}`,
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text: `Hello ${recipient.name}!\n\nThis is your personalized newsletter.\n\nBest regards,\nThe Newsletter Team`,
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html: `
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<h2>Hello ${recipient.name}!</h2>
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<p>This is your personalized newsletter for ${new Date().toLocaleDateString()}.</p>
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<p>This email was delivered via our SMTP WebSocket transport system.</p>
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<hr>
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<p><small>Newsletter #${index + 1} | Sent at ${new Date().toLocaleTimeString()}</small></p>
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`
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});
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console.log(`Email ${index + 1}/${recipients.length} sent to ${recipient.email}`);
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return {
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success: true,
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recipient: recipient.email,
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messageId: info.messageId,
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response: info.response
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};
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} catch (error) {
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console.error(`Failed to send email ${index + 1} to ${recipient.email}:`, (error as Error).message);
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return {
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success: false,
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recipient: recipient.email,
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error: (error as Error).message
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};
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}
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});
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// Wait for all emails to complete
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const emailResults = await Promise.allSettled(emailPromises);
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const duration = Date.now() - startTime;
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// Process results
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let successful = 0;
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let failed = 0;
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emailResults.forEach((result) => {
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if (result.status === 'fulfilled') {
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results.push(result.value);
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if (result.value.success) {
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successful++;
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} else {
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failed++;
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}
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} else {
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failed++;
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results.push({
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success: false,
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error: result.reason.message
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});
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}
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});
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// Display summary
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console.log('\n--- Bulk Email Results ---');
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console.log(`Total emails: ${recipients.length}`);
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console.log(`Successful: ${successful}`);
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console.log(`Failed: ${failed}`);
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console.log(`Duration: ${(duration / 1000).toFixed(2)} seconds`);
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console.log(`Average time per email: ${(duration / recipients.length).toFixed(0)}ms`);
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// Display failed emails if any
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if (failed > 0) {
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console.log('\nFailed emails:');
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results.forEach((result, index) => {
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if (!result.success) {
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console.log(` ${index + 1}. ${result.recipient || 'Unknown'}: ${result.error}`);
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}
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});
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}
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// Close transport
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await transport.close();
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console.log('\nTransport closed');
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}
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// Advanced bulk email with throttling
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async function throttledBulkEmail() {
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console.log('\nThrottled Bulk Email Example\n');
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const transport = createTransport({
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host: 'localhost',
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port: 3000,
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auth: {
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user: 'your-api-key-here'
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}
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});
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const transporter = nodemailer.createTransporter(transport);
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// Generate larger recipient list
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const recipients = Array.from({ length: 20 }, (_, i) => ({
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email: `user${i + 1}@example.com`,
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name: `User ${i + 1}`
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}));
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console.log(`Sending throttled emails to ${recipients.length} recipients...`);
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console.log('Processing 5 emails at a time with 1 second delay between batches\n');
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const batchSize = 5;
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const batches = [];
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for (let i = 0; i < recipients.length; i += batchSize) {
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batches.push(recipients.slice(i, i + batchSize));
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}
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let totalSuccessful = 0;
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let totalFailed = 0;
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for (let batchIndex = 0; batchIndex < batches.length; batchIndex++) {
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const batch = batches[batchIndex];
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console.log(`Processing batch ${batchIndex + 1}/${batches.length} (${batch.length} emails)...`);
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const batchPromises = batch.map(async (recipient) => {
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try {
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await transporter.sendMail({
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from: 'batch@example.com',
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to: recipient.email,
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subject: `Batch Email - ${recipient.name}`,
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text: `Hello ${recipient.name}, this is a batch email.`
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});
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return { success: true, email: recipient.email };
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} catch (error) {
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return { success: false, email: recipient.email, error: (error as Error).message };
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}
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});
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const batchResults = await Promise.all(batchPromises);
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const batchSuccessful = batchResults.filter(r => r.success).length;
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const batchFailed = batchResults.filter(r => !r.success).length;
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totalSuccessful += batchSuccessful;
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totalFailed += batchFailed;
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console.log(`Batch ${batchIndex + 1} complete: ${batchSuccessful} successful, ${batchFailed} failed`);
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// Wait between batches (except for the last one)
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if (batchIndex < batches.length - 1) {
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await new Promise(resolve => setTimeout(resolve, 1000));
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}
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}
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console.log(`\nThrottled bulk email complete: ${totalSuccessful} successful, ${totalFailed} failed`);
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await transport.close();
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}
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// Run the examples
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if (require.main === module) {
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(async () => {
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try {
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await bulkEmailExample();
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await throttledBulkEmail();
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console.log('\nBulk email examples completed successfully');
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} catch (error) {
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console.error('\nExamples failed:', error);
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} finally {
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process.exit(0);
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}
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})();
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}
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export { bulkEmailExample, throttledBulkEmail };
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@ -13,12 +13,10 @@ async function nodemailerTransportExample() {
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// Create the WebSocket transport
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const transport = createTransport({
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host: '192.168.0.62',
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apiKey: 'cebc9a7f-4e0c-4fda-9dd0-85f48c02800c',
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port: 80,
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secure: false, // Set to true for wss://
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auth: {
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user: 'cebc9a7f-4e0c-4fda-9dd0-85f48c02800c' // Your SMTP relay API key
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},
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debug: true
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debug: false
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});
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// Create Nodemailer transporter
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@ -39,8 +37,8 @@ async function nodemailerTransportExample() {
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console.log('Sending test email...');
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const info = await transporter.sendMail({
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from: 'sender@example.com',
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to: 'recipient@example.com',
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from: 'cudconnex@satitm.chula.ac.th',
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to: 'siwat.s@chula.ac.th',
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subject: 'Test Email via SMTP WebSocket',
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text: 'This email was sent using the SMTP WebSocket transport!',
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html: `
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