Redirect the viewer to a new URL - Amazon CloudFront
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Redirect the viewer to a new URL

The following example function generates a response to redirect the viewer to a country-specific URL when the request comes from within a particular country. This function relies on the value of the CloudFront-Viewer-Country header to determine the viewer’s country.

Important

For this function to work, you must configure CloudFront to add the CloudFront-Viewer-Country header to incoming requests by adding it to the allowed headers in a cache policy or an origin request policy.

This example redirects the viewer to a Germany-specific URL when the viewer request comes from Germany. If the viewer request doesn’t come from Germany, the function returns the original, unmodified request.

This is a viewer request function.

See this example on GitHub.

JavaScript runtime 2.0
async function handler(event) {
    const request = event.request;
    const headers = request.headers;
    const host = request.headers.host.value;
    const country = Symbol.for('DE'); // Choose a country code
    const newurl = `https://${host}/de/index.html`; // Change the redirect URL to your choice 
  
    if (headers['cloudfront-viewer-country']) {
        const countryCode = Symbol.for(headers['cloudfront-viewer-country'].value);
        if (countryCode === country) {
            const response = {
                statusCode: 302,
                statusDescription: 'Found',
                headers:
                    { "location": { "value": newurl } }
                }

            return response;
        }
    }
    return request;
}
JavaScript runtime 1.0
function handler(event) {
    var request = event.request;
    var headers = request.headers;
    var host = request.headers.host.value;
    var country = 'DE' // Choose a country code
    var newurl = `https://${host}/de/index.html` // Change the redirect URL to your choice

    if (headers['cloudfront-viewer-country']) {
        var countryCode = headers['cloudfront-viewer-country'].value;
        if (countryCode === country) {
            var response = {
                statusCode: 302,
                statusDescription: 'Found',
                headers:
                    { "location": { "value": newurl } }
                }

            return response;
        }
    }
    return request;
}

For more information about rewrites and redirects, see Handling rewrites and redirects using edge functions in the Amazon workshop studio.