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Sync.js, Node.js Implementation
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/** | |
* The following functions reads cookies created by VWO from request and syncs them back to client | |
*/ | |
function syncCookies(request, response) { | |
let cookies = request.headers.cookie; | |
const responseHeaders = { | |
"Access-Control-Allow-Credentials": true, | |
"Access-Control-Allow-Origin": request.headers.origin ? request.headers.origin : "*" | |
}; | |
if (!cookies) { | |
response.writeHead(200, responseHeaders); | |
response.end("1"); | |
return; | |
} | |
cookies = cookies.split(";"); | |
cookies.forEach(function(cookie) { | |
const cookieParts = cookie.trim().split("="), | |
name = cookieParts[0], | |
value = cookieParts[1]; | |
if (name.search(/^(_vis_opt_|_vwo)/) !== -1) { | |
responseHeaders["Set-Cookie"] = responseHeaders["Set-Cookie"] || []; | |
// Expire any VWO cookies after 10 years. | |
// Set the cookie on root path so that it's accessible on all paths | |
// Set the domain to .<eTld+1> | |
responseHeaders["Set-Cookie"].push(`${name}=${value};path=/;domain=.<eTld+1>;expires=${new Date(Date.now() + 10 * 365 * 24 * 3600 * 1000).toGMTString()}`); | |
// e.g. for a website example.abc.com eTld would be "com". So eTld+1 would be "abc.com". | |
// If you are not sure about what is the value in your case, you can contact the VWO support team. | |
// responseHeaders["Set-Cookie"].push(`${name}=${value};path=/;domain=.abc.com;expires=${new Date(Date.now() + 10 * 365 * 24 * 3600 * 1000).toGMTString()};`); | |
} | |
}); | |
response.writeHead(200, responseHeaders); | |
response.end("1"); | |
} | |
// If you are using express framework e.g., you can use the above code as follows | |
app.get('/sync', function(request, response) { | |
return syncCookies(request, response) | |
}); |
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