getMyDirectory.sjs

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function handleRequest(request, response) {

  var file;

  getObjectState("SERVER_ROOT", function (serverRoot) {

    var ref = request.getHeader("Referer").split("?")[0];

    // 8 is "https://".length which is the longest string before the host.

    var pathStart = ref.indexOf("/", 8) + 1;

    var pathEnd = ref.lastIndexOf("/") + 1;

    file = serverRoot.getFile(ref.substring(pathStart, pathEnd) + "x");

});

  response.setHeader("Content-Type", "text/plain", false);

  response.write(file.path.substr(0, file.path.length - 1));