umami/lib/session.js

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import { getWebsiteByUuid, getSessionByUuid, createSession } from 'queries';
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import { getJsonBody, getClientInfo } from 'lib/request';
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import { uuid, isValidUuid, parseToken } from 'lib/crypto';
export async function getSession(req) {
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const { payload } = getJsonBody(req);
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if (!payload) {
throw new Error('Invalid request');
}
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const { website: website_uuid, hostname, screen, language } = payload;
const cache = req.headers['x-umami-cache'];
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if (cache) {
const result = await parseToken(cache);
if (result) {
return result;
}
}
if (!isValidUuid(website_uuid)) {
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throw new Error(`Invalid website: ${website_uuid}`);
}
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const { userAgent, browser, os, ip, country, device } = await getClientInfo(req, payload);
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const website = await getWebsiteByUuid(website_uuid);
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if (!website) {
throw new Error(`Website not found: ${website_uuid}`);
}
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const { website_id } = website;
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const session_uuid = uuid(website_id, hostname, ip, userAgent);
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let session = await getSessionByUuid(session_uuid);
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if (!session) {
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try {
session = await createSession(website_id, {
session_uuid,
hostname,
browser,
os,
screen,
language,
country,
device,
});
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if (!session) {
return null;
}
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} catch (e) {
if (!e.message.includes('Unique constraint')) {
throw e;
}
}
}
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const { session_id } = session;
return {
website_id,
session_id,
};
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}