The Tor Browser / file revision

 // Server side js file for bug 910139, see file test_CSP_bug910139.html for details.

 Components.utils.import("resource://gre/modules/NetUtil.jsm");

 function loadResponseFromFile(path) {

   var testHTMLFile =

     Components.classes["@mozilla.org/file/directory_service;1"].

     getService(Components.interfaces.nsIProperties).

     get("CurWorkD", Components.interfaces.nsILocalFile);

   var dirs = path.split("/");

   for (var i = 0; i < dirs.length; i++) {

     testHTMLFile.append(dirs[i]);

   }

   var testHTMLFileStream =

     Components.classes["@mozilla.org/network/file-input-stream;1"].

     createInstance(Components.interfaces.nsIFileInputStream);

   testHTMLFileStream.init(testHTMLFile, -1, 0, 0);

   var testHTML = NetUtil.readInputStreamToString(testHTMLFileStream, testHTMLFileStream.available());

   return testHTML;

 }

 var policies = [

   "default-src 'self'; script-src 'self'",       // CSP for checkAllowed

   "default-src 'self'; script-src *.example.com" // CSP for checkBlocked

 ]

 function getPolicy() {

   var index;

   // setState only accepts strings as arguments

   if (!getState("counter")) {

     index = 0;

     setState("counter", index.toString());

   }

   else {

     index = parseInt(getState("counter"));

     ++index;

     setState("counter", index.toString());

   }

   return policies[index];

 }

 function handleRequest(request, response)

 {

   // avoid confusing cache behaviors

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

   // set the required CSP

   response.setHeader("Content-Security-Policy", getPolicy(), false);

   // return the requested XML file.

   response.write(loadResponseFromFile("tests/content/base/test/csp/file_CSP_bug910139.xml"));

 }