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lambdaRewrite.js
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lambdaRewrite.js
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/* Public domain project by Cloud Under (https://cloudunder.io).
* Repository: https://github.com/CloudUnder/lambda-edge-nice-urls
*/
const config = {
suffix: '.html',
appendToDirs: 'index.html',
removeTrailingSlash: false,
};
const regexSuffixless = /\/[^/.]+$/; // e.g. "/some/page" but not "/", "/some/" or "/some.jpg"
const regexTrailingSlash = /.+\/$/; // e.g. "/some/" or "/some/page/" but not root "/"
exports.handler = function handler(event, context, callback) {
const { request } = event.Records[0].cf;
const { uri } = request;
const { suffix, appendToDirs, removeTrailingSlash } = config;
// Append ".html" to origin request
if (suffix && uri.match(regexSuffixless)) {
request.uri = uri + suffix;
callback(null, request);
return;
}
// Append "index.html" to origin request
if (appendToDirs && uri.match(regexTrailingSlash)) {
request.uri = uri + appendToDirs;
callback(null, request);
return;
}
// Redirect (301) non-root requests ending in "/" to URI without trailing slash
if (removeTrailingSlash && uri.match(/.+\/$/)) {
const response = {
// body: '',
// bodyEncoding: 'text',
headers: {
'location': [{
key: 'Location',
value: uri.slice(0, -1)
}]
},
status: '301',
statusDescription: 'Moved Permanently'
};
callback(null, response);
return;
}
// If nothing matches, return request unchanged
callback(null, request);
};