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Proper email attachment handling

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This commit is contained in:
Roman Krček
2025-06-24 14:49:07 +02:00
parent e2e18d1084
commit be2e22100f
4 changed files with 82 additions and 39 deletions
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21
package-lock.json generated
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@@ -12,7 +12,8 @@
"@supabase/supabase-js": "^2.50.0", "@supabase/supabase-js": "^2.50.0",
"@sveltejs/adapter-node": "^5.2.12", "@sveltejs/adapter-node": "^5.2.12",
"googleapis": "^150.0.1", "googleapis": "^150.0.1",
"papaparse": "^5.5.3" "papaparse": "^5.5.3",
"quoted-printable": "^1.0.1"
}, },
"devDependencies": { "devDependencies": {
"@sveltejs/kit": "^2.16.0", "@sveltejs/kit": "^2.16.0",
@@ -2691,6 +2692,18 @@
"url": "https://github.com/sponsors/ljharb" "url": "https://github.com/sponsors/ljharb"
} }
}, },
"node_modules/quoted-printable": {
"version": "1.0.1",
"resolved": "https://registry.npmjs.org/quoted-printable/-/quoted-printable-1.0.1.tgz",
"integrity": "sha512-cihC68OcGiQOjGiXuo5Jk6XHANTHl1K4JLk/xlEJRTIXfy19Sg6XzB95XonYgr+1rB88bCpr7WZE7D7AlZow4g==",
"license": "MIT",
"dependencies": {
"utf8": "^2.1.0"
},
"bin": {
"quoted-printable": "bin/quoted-printable"
}
},
"node_modules/readdirp": { "node_modules/readdirp": {
"version": "4.1.2", "version": "4.1.2",
"resolved": "https://registry.npmjs.org/readdirp/-/readdirp-4.1.2.tgz", "resolved": "https://registry.npmjs.org/readdirp/-/readdirp-4.1.2.tgz",
@@ -3050,6 +3063,12 @@
"integrity": "sha512-XdVKMF4SJ0nP/O7XIPB0JwAEuT9lDIYnNsK8yGVe43y0AWoKeJNdv3ZNWh7ksJ6KqQFjOO6ox/VEitLnaVNufw==", "integrity": "sha512-XdVKMF4SJ0nP/O7XIPB0JwAEuT9lDIYnNsK8yGVe43y0AWoKeJNdv3ZNWh7ksJ6KqQFjOO6ox/VEitLnaVNufw==",
"license": "BSD" "license": "BSD"
}, },
"node_modules/utf8": {
"version": "2.1.2",
"resolved": "https://registry.npmjs.org/utf8/-/utf8-2.1.2.tgz",
"integrity": "sha512-QXo+O/QkLP/x1nyi54uQiG0XrODxdysuQvE5dtVqv7F5K2Qb6FsN+qbr6KhF5wQ20tfcV3VQp0/2x1e1MRSPWg==",
"license": "MIT"
},
"node_modules/util-deprecate": { "node_modules/util-deprecate": {
"version": "1.0.2", "version": "1.0.2",
"resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz", "resolved": "https://registry.npmjs.org/util-deprecate/-/util-deprecate-1.0.2.tgz",

3
package.json
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@@ -33,6 +33,7 @@
"@supabase/supabase-js": "^2.50.0", "@supabase/supabase-js": "^2.50.0",
"@sveltejs/adapter-node": "^5.2.12", "@sveltejs/adapter-node": "^5.2.12",
"googleapis": "^150.0.1", "googleapis": "^150.0.1",
"papaparse": "^5.5.3" "papaparse": "^5.5.3",
"quoted-printable": "^1.0.1"
} }
} }

83
src/lib/google.ts
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@@ -1,5 +1,6 @@
import { google } from 'googleapis'; import { google } from 'googleapis';
import { env } from '$env/dynamic/private'; import { env } from '$env/dynamic/private';
import quotedPrintable from 'quoted-printable'; // tiny, zero-dep package
export const scopes = ['https://www.googleapis.com/auth/gmail.send']; export const scopes = ['https://www.googleapis.com/auth/gmail.send'];
@@ -27,51 +28,73 @@ export async function exchangeCodeForTokens(code: string) {
export async function sendGmail( export async function sendGmail(
refreshToken: string, refreshToken: string,
{ to, subject, text }: { to: string; subject: string; text: string } { to, subject, text, qr_code }: { to: string; subject: string; text: string; qr_code: string }
) { ) {
const oauth = getOAuthClient(); const oauth = getOAuthClient();
oauth.setCredentials({ refresh_token: refreshToken }); oauth.setCredentials({ refresh_token: refreshToken });
const gmail = google.gmail({ version: 'v1', auth: oauth }); const gmail = google.gmail({ version: 'v1', auth: oauth });
const wrappedHtml = `<!DOCTYPE html> const message_html =
`<!DOCTYPE html>
<html lang="en"> <html lang="en">
<head> <head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>${subject}</title>
<link href="https://fonts.googleapis.com/css?family=Lato:400,700&display=swap" rel="stylesheet">
<style> <style>
body { font-family: 'Lato', Arial, sans-serif; margin: 0; padding: 0; background: #f9f9f9; } @import url('https://fonts.googleapis.com/css2?family=Lato&display=swap');
.container {
max-width: 480px;
margin: 0 auto;
background: #fff;
border-radius: 8px;
box-shadow: 0 2px 8px rgba(0,0,0,0.04);
padding: 24px 16px;
word-break: break-word;
}
@media (max-width: 600px) {
.container { padding: 16px 4px; }
}
</style> </style>
</head> </head>
<body> <body style="font-family: 'Lato', sans-serif; background-color: #f9f9f9; padding: 20px; margin: 0;">
<div class="container">${text}</div> <div style="max-width: 600px; margin: auto; background: white; padding: 20px; border-radius: 8px; box-shadow: 0 2px 4px rgba(0,0,0,0.05);">
<p style="white-space: pre-line;font-size: 16px; line-height: 1.5; color: #333;">${text}</p>
<img src="cid:qrCode1" alt="QR Code" style="display: block; margin: 20px auto; max-width: 50%; min-width: 200px; height: auto;" />
<div style="width: 100%; display: flex; flex-direction: row; justify-content: space-between">
<div style="height: 4px; width: 20%; background: #00aeef;"></div>
<div style="height: 4px; width: 20%; background: #ec008c;"></div>
<div style="height: 4px; width: 20%; background: #7ac143;"></div>
<div style="height: 4px; width: 20%; background: #f47b20;"></div>
<div style="height: 4px; width: 20%; background: #2e3192;"></div>
</div>
<div style="font-size: 12px; color: #999; padding-top: 0px; margin-top: 10px; line-height: 1.5; ">
<p>This email has been generated with the help of *insert software name*</p>
</div>
</div>
</body> </body>
</html>`; </html>`;
const message = [
`To: ${to}`,
'Content-Type: text/html; charset="UTF-8"',
'Content-Transfer-Encoding: 7bit',
`Subject: ${subject}`,
'',
wrappedHtml
].join('\n');
const raw = Buffer.from(message).toString('base64url'); const boundary = 'BOUNDARY';
const nl = '\r\n'; // RFC-5322 line ending
const htmlQP = quotedPrintable.encode(message_html);
const qrLines = qr_code.replace(/.{1,76}/g, '$&' + nl);
const rawParts = [
'MIME-Version: 1.0',
`To: ${to}`,
`Subject: ${subject}`,
`Content-Type: multipart/related; boundary="${boundary}"`,
'',
`--${boundary}`,
'Content-Type: text/html; charset="UTF-8"',
'Content-Transfer-Encoding: quoted-printable',
'',
htmlQP,
'',
`--${boundary}`,
'Content-Type: image/png',
'Content-Transfer-Encoding: base64',
'Content-ID: <qrCode1>',
'Content-Disposition: inline; filename="qr.png"',
'',
qrLines,
'',
`--${boundary}--`,
''
];
const rawMessage = rawParts.join(nl);
const raw = Buffer.from(rawMessage).toString('base64url');
await gmail.users.messages.send({ await gmail.users.messages.send({
userId: 'me', userId: 'me',

4
src/routes/private/api/gmail/+server.ts
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@@ -36,13 +36,13 @@ export const GET: RequestHandler = async ({ url }) => {
/* ───────────── POST ───────────── */ /* ───────────── POST ───────────── */
export const POST: RequestHandler = async ({ request }) => { export const POST: RequestHandler = async ({ request }) => {
const { action, refreshToken, to, subject, text } = await request.json(); const { action, refreshToken, to, subject, text, qr_code } = await request.json();
/* send e-mail */ /* send e-mail */
if (action === 'send') { if (action === 'send') {
if (!refreshToken) return new Response('Missing token', { status: 401 }); if (!refreshToken) return new Response('Missing token', { status: 401 });
try { try {
await sendGmail(refreshToken, { to, subject, text }); await sendGmail(refreshToken, { to, subject, text, qr_code });
return json({ ok: true }); return json({ ok: true });
} catch (err) { } catch (err) {
return new Response((err as Error).message, { status: 500 }); return new Response((err as Error).message, { status: 500 });