file_block_toplevel_data_redirect.sjs

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// Custom *.sjs file specifically for the needs of Bug:

// Bug 1394554 - Block toplevel data: URI navigations after redirect

var DATA_URI =

  "<body>toplevel data: URI navigations after redirect should be blocked</body>";

function handleRequest(request, response) {

  // avoid confusing cache behaviors

  response.setHeader("Cache-Control", "no-cache", false);

  response.setStatusLine("1.1", 302, "Found");

  response.setHeader("Location", "data:text/html," + escape(DATA_URI), false);