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Philipp Kunz
2025-05-24 14:39:48 +00:00
parent dc5c0b2584
commit 6e19e30f87
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test/suite/smtpserver_email-processing/test.ep-05.mime-handling.ts Normal file
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import { tap, expect } from '@git.zone/tstest/tapbundle';
import * as net from 'net';
import { startTestServer, stopTestServer } from '../../helpers/server.loader.js'
import type { ITestServer } from '../../helpers/server.loader.js';
const TEST_PORT = 2525;
let testServer: ITestServer;
tap.test('setup - start test server', async () => {
testServer = await startTestServer({ port: TEST_PORT });
await new Promise(resolve => setTimeout(resolve, 1000));
});
tap.test('MIME Handling - Comprehensive multipart message', async (tools) => {
const done = tools.defer();
const socket = net.createConnection({
host: 'localhost',
port: TEST_PORT,
timeout: 30000
});
let dataBuffer = '';
let step = 'greeting';
let completed = false;
socket.on('data', (data) => {
dataBuffer += data.toString();
console.log('Server response:', data.toString());
if (step === 'greeting' && dataBuffer.includes('220 ')) {
step = 'ehlo';
socket.write('EHLO testclient\r\n');
dataBuffer = '';
} else if (step === 'ehlo' && dataBuffer.includes('250')) {
step = 'mail';
socket.write('MAIL FROM:<sender@example.com>\r\n');
dataBuffer = '';
} else if (step === 'mail' && dataBuffer.includes('250')) {
step = 'rcpt';
socket.write('RCPT TO:<recipient@example.com>\r\n');
dataBuffer = '';
} else if (step === 'rcpt' && dataBuffer.includes('250')) {
step = 'data';
socket.write('DATA\r\n');
dataBuffer = '';
} else if (step === 'data' && dataBuffer.includes('354')) {
// Create comprehensive MIME test email
const boundary = 'mime-test-boundary-12345';
const innerBoundary = 'inner-mime-boundary-67890';
const email = [
`From: sender@example.com`,
`To: recipient@example.com`,
`Subject: MIME Handling Test - Comprehensive`,
`Date: ${new Date().toUTCString()}`,
`Message-ID: <mime-test-${Date.now()}@example.com>`,
`MIME-Version: 1.0`,
`Content-Type: multipart/mixed; boundary="${boundary}"`,
'',
'This is a multi-part message in MIME format.',
'',
`--${boundary}`,
`Content-Type: text/plain; charset=utf-8`,
`Content-Transfer-Encoding: 7bit`,
'',
'This is the plain text part of the email.',
'It tests basic MIME text handling.',
'',
`--${boundary}`,
`Content-Type: text/html; charset=utf-8`,
`Content-Transfer-Encoding: quoted-printable`,
'',
'<html>',
'<head><title>MIME Test</title></head>',
'<body>',
'<h1>HTML MIME Content</h1>',
'<p>This tests HTML MIME content handling.</p>',
'<p>Special chars: =E2=98=85 =E2=9C=93 =E2=9D=A4</p>',
'</body>',
'</html>',
'',
`--${boundary}`,
`Content-Type: multipart/alternative; boundary="${innerBoundary}"`,
'',
`--${innerBoundary}`,
`Content-Type: text/plain; charset=iso-8859-1`,
`Content-Transfer-Encoding: base64`,
'',
'VGhpcyBpcyBiYXNlNjQgZW5jb2RlZCB0ZXh0IGNvbnRlbnQu',
'',
`--${innerBoundary}`,
`Content-Type: application/json; charset=utf-8`,
'',
'{"message": "JSON MIME content", "test": true, "special": "àáâãäå"}',
'',
`--${innerBoundary}--`,
'',
`--${boundary}`,
`Content-Type: image/png`,
`Content-Disposition: attachment; filename="test.png"`,
`Content-Transfer-Encoding: base64`,
'',
'iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mP8/5+hHgAHggJ/PchI7wAAAABJRU5ErkJggg==',
'',
`--${boundary}`,
`Content-Type: text/csv`,
`Content-Disposition: attachment; filename="data.csv"`,
'',
'Name,Age,Email',
'John,25,john@example.com',
'Jane,30,jane@example.com',
'',
`--${boundary}`,
`Content-Type: application/pdf`,
`Content-Disposition: attachment; filename="document.pdf"`,
`Content-Transfer-Encoding: base64`,
'',
'JVBERi0xLjQKJcOkw7zDtsOVDQo=',
'',
`--${boundary}--`,
'.',
''
].join('\r\n');
console.log('Sending comprehensive MIME email with multiple parts and encodings');
socket.write(email);
step = 'sent';
dataBuffer = '';
} else if (step === 'sent' && dataBuffer.includes('250 ') && dataBuffer.includes('message queued')) {
if (!completed) {
completed = true;
console.log('Complex MIME message accepted successfully');
expect(true).toEqual(true);
socket.write('QUIT\r\n');
socket.end();
done.resolve();
}
}
});
socket.on('error', (err) => {
console.error('Socket error:', err);
done.reject(err);
});
await done.promise;
});
tap.test('MIME Handling - Quoted-printable encoding', async (tools) => {
const done = tools.defer();
const socket = net.createConnection({
host: 'localhost',
port: TEST_PORT,
timeout: 30000
});
let dataBuffer = '';
let step = 'greeting';
let completed = false;
socket.on('data', (data) => {
dataBuffer += data.toString();
console.log('Server response:', data.toString());
if (step === 'greeting' && dataBuffer.includes('220 ')) {
step = 'ehlo';
socket.write('EHLO testclient\r\n');
dataBuffer = '';
} else if (step === 'ehlo' && dataBuffer.includes('250')) {
step = 'mail';
socket.write('MAIL FROM:<sender@example.com>\r\n');
dataBuffer = '';
} else if (step === 'mail' && dataBuffer.includes('250')) {
step = 'rcpt';
socket.write('RCPT TO:<recipient@example.com>\r\n');
dataBuffer = '';
} else if (step === 'rcpt' && dataBuffer.includes('250')) {
step = 'data';
socket.write('DATA\r\n');
dataBuffer = '';
} else if (step === 'data' && dataBuffer.includes('354')) {
const email = [
`From: sender@example.com`,
`To: recipient@example.com`,
`Subject: =?UTF-8?Q?Quoted=2DPrintable=20Test=20=F0=9F=8C=9F?=`,
`Date: ${new Date().toUTCString()}`,
`Message-ID: <qp-test-${Date.now()}@example.com>`,
`MIME-Version: 1.0`,
`Content-Type: text/plain; charset=utf-8`,
`Content-Transfer-Encoding: quoted-printable`,
'',
'This is a test of quoted-printable encoding.',
'Special characters: =C3=A9 =C3=A8 =C3=AA =C3=AB',
'Long line that needs to be wrapped with soft line breaks at 76 character=',
's per line to comply with MIME standards for quoted-printable encoding.',
'Emoji: =F0=9F=98=80 =F0=9F=91=8D =F0=9F=8C=9F',
'.',
''
].join('\r\n');
socket.write(email);
step = 'sent';
dataBuffer = '';
} else if (step === 'sent' && dataBuffer.includes('250 ') && dataBuffer.includes('message queued')) {
if (!completed) {
completed = true;
console.log('Quoted-printable encoded email accepted');
expect(true).toEqual(true);
socket.write('QUIT\r\n');
socket.end();
done.resolve();
}
}
});
socket.on('error', (err) => {
console.error('Socket error:', err);
done.reject(err);
});
await done.promise;
});
tap.test('MIME Handling - Base64 encoding', async (tools) => {
const done = tools.defer();
const socket = net.createConnection({
host: 'localhost',
port: TEST_PORT,
timeout: 30000
});
let dataBuffer = '';
let step = 'greeting';
let completed = false;
socket.on('data', (data) => {
dataBuffer += data.toString();
console.log('Server response:', data.toString());
if (step === 'greeting' && dataBuffer.includes('220 ')) {
step = 'ehlo';
socket.write('EHLO testclient\r\n');
dataBuffer = '';
} else if (step === 'ehlo' && dataBuffer.includes('250')) {
step = 'mail';
socket.write('MAIL FROM:<sender@example.com>\r\n');
dataBuffer = '';
} else if (step === 'mail' && dataBuffer.includes('250')) {
step = 'rcpt';
socket.write('RCPT TO:<recipient@example.com>\r\n');
dataBuffer = '';
} else if (step === 'rcpt' && dataBuffer.includes('250')) {
step = 'data';
socket.write('DATA\r\n');
dataBuffer = '';
} else if (step === 'data' && dataBuffer.includes('354')) {
const boundary = 'base64-test-boundary';
const textContent = 'This is a test of base64 encoding with various content types.\nSpecial chars: éèêë\nEmoji: 😀 👍 🌟';
const base64Content = Buffer.from(textContent).toString('base64');
const email = [
`From: sender@example.com`,
`To: recipient@example.com`,
`Subject: Base64 Encoding Test`,
`Date: ${new Date().toUTCString()}`,
`Message-ID: <base64-test-${Date.now()}@example.com>`,
`MIME-Version: 1.0`,
`Content-Type: multipart/mixed; boundary="${boundary}"`,
'',
`--${boundary}`,
`Content-Type: text/plain; charset=utf-8`,
`Content-Transfer-Encoding: base64`,
'',
base64Content,
'',
`--${boundary}`,
`Content-Type: application/octet-stream`,
`Content-Disposition: attachment; filename="binary.dat"`,
`Content-Transfer-Encoding: base64`,
'',
'VGhpcyBpcyBiaW5hcnkgZGF0YSBmb3IgdGVzdGluZw==',
'',
`--${boundary}--`,
'.',
''
].join('\r\n');
socket.write(email);
step = 'sent';
dataBuffer = '';
} else if (step === 'sent' && dataBuffer.includes('250 ') && dataBuffer.includes('message queued')) {
if (!completed) {
completed = true;
console.log('Base64 encoded email accepted');
expect(true).toEqual(true);
socket.write('QUIT\r\n');
socket.end();
done.resolve();
}
}
});
socket.on('error', (err) => {
console.error('Socket error:', err);
done.reject(err);
});
await done.promise;
});
tap.test('MIME Handling - Content-Disposition headers', async (tools) => {
const done = tools.defer();
const socket = net.createConnection({
host: 'localhost',
port: TEST_PORT,
timeout: 30000
});
let dataBuffer = '';
let step = 'greeting';
let completed = false;
socket.on('data', (data) => {
dataBuffer += data.toString();
console.log('Server response:', data.toString());
if (step === 'greeting' && dataBuffer.includes('220 ')) {
step = 'ehlo';
socket.write('EHLO testclient\r\n');
dataBuffer = '';
} else if (step === 'ehlo' && dataBuffer.includes('250')) {
step = 'mail';
socket.write('MAIL FROM:<sender@example.com>\r\n');
dataBuffer = '';
} else if (step === 'mail' && dataBuffer.includes('250')) {
step = 'rcpt';
socket.write('RCPT TO:<recipient@example.com>\r\n');
dataBuffer = '';
} else if (step === 'rcpt' && dataBuffer.includes('250')) {
step = 'data';
socket.write('DATA\r\n');
dataBuffer = '';
} else if (step === 'data' && dataBuffer.includes('354')) {
const boundary = 'disposition-test-boundary';
const email = [
`From: sender@example.com`,
`To: recipient@example.com`,
`Subject: Content-Disposition Test`,
`Date: ${new Date().toUTCString()}`,
`Message-ID: <disposition-test-${Date.now()}@example.com>`,
`MIME-Version: 1.0`,
`Content-Type: multipart/mixed; boundary="${boundary}"`,
'',
`--${boundary}`,
`Content-Type: text/plain`,
`Content-Disposition: inline`,
'',
'This is inline text content.',
'',
`--${boundary}`,
`Content-Type: image/jpeg`,
`Content-Disposition: attachment; filename="photo.jpg"`,
`Content-Transfer-Encoding: base64`,
'',
'/9j/4AAQSkZJRgABAQEASABIAAD/2wBDAAEBAQ==',
'',
`--${boundary}`,
`Content-Type: application/pdf`,
`Content-Disposition: attachment; filename="report.pdf"; size=1234`,
`Content-Description: Monthly Report`,
'',
'PDF content here',
'',
`--${boundary}`,
`Content-Type: text/html`,
`Content-Disposition: inline; filename="content.html"`,
'',
'<html><body>Inline HTML content</body></html>',
'',
`--${boundary}--`,
'.',
''
].join('\r\n');
socket.write(email);
step = 'sent';
dataBuffer = '';
} else if (step === 'sent' && dataBuffer.includes('250 ') && dataBuffer.includes('message queued')) {
if (!completed) {
completed = true;
console.log('Email with various Content-Disposition headers accepted');
expect(true).toEqual(true);
socket.write('QUIT\r\n');
socket.end();
done.resolve();
}
}
});
socket.on('error', (err) => {
console.error('Socket error:', err);
done.reject(err);
});
await done.promise;
});
tap.test('MIME Handling - International character sets', async (tools) => {
const done = tools.defer();
const socket = net.createConnection({
host: 'localhost',
port: TEST_PORT,
timeout: 30000
});
let dataBuffer = '';
let step = 'greeting';
let completed = false;
socket.on('data', (data) => {
dataBuffer += data.toString();
console.log('Server response:', data.toString());
if (step === 'greeting' && dataBuffer.includes('220 ')) {
step = 'ehlo';
socket.write('EHLO testclient\r\n');
dataBuffer = '';
} else if (step === 'ehlo' && dataBuffer.includes('250')) {
step = 'mail';
socket.write('MAIL FROM:<sender@example.com>\r\n');
dataBuffer = '';
} else if (step === 'mail' && dataBuffer.includes('250')) {
step = 'rcpt';
socket.write('RCPT TO:<recipient@example.com>\r\n');
dataBuffer = '';
} else if (step === 'rcpt' && dataBuffer.includes('250')) {
step = 'data';
socket.write('DATA\r\n');
dataBuffer = '';
} else if (step === 'data' && dataBuffer.includes('354')) {
const boundary = 'intl-charset-boundary';
const email = [
`From: sender@example.com`,
`To: recipient@example.com`,
`Subject: International Character Sets`,
`Date: ${new Date().toUTCString()}`,
`Message-ID: <intl-charset-${Date.now()}@example.com>`,
`MIME-Version: 1.0`,
`Content-Type: multipart/mixed; boundary="${boundary}"`,
'',
`--${boundary}`,
`Content-Type: text/plain; charset=utf-8`,
'',
'UTF-8: Français, Español, Deutsch, 中文, 日本語, 한국어, العربية',
'',
`--${boundary}`,
`Content-Type: text/plain; charset=iso-8859-1`,
'',
'ISO-8859-1: Français, Español, Português',
'',
`--${boundary}`,
`Content-Type: text/plain; charset=windows-1252`,
'',
'Windows-1252: Special chars: €‚ƒ„…†‡',
'',
`--${boundary}`,
`Content-Type: text/plain; charset=shift_jis`,
'',
'Shift-JIS: Japanese text',
'',
`--${boundary}--`,
'.',
''
].join('\r\n');
socket.write(email);
step = 'sent';
dataBuffer = '';
} else if (step === 'sent' && dataBuffer.includes('250 ') && dataBuffer.includes('message queued')) {
if (!completed) {
completed = true;
console.log('Email with international character sets accepted');
expect(true).toEqual(true);
socket.write('QUIT\r\n');
socket.end();
done.resolve();
}
}
});
socket.on('error', (err) => {
console.error('Socket error:', err);
done.reject(err);
});
await done.promise;
});
tap.test('cleanup - stop test server', async () => {
await stopTestServer(testServer);
});
tap.start();