file_form_action_server.sjs

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// Custom *.sjs file specifically for the needs of Bug 1251043

const FRAME = `

  <!DOCTYPE html>

  <html>

  <head>

    <title>Bug 1251043 - Test form-action blocks URL</title>

    <meta http-equiv="Content-Security-Policy" content="form-action 'none';">

  </head>

  <body>

    CONTROL-TEXT

    <form action="file_form_action_server.sjs?formsubmission" method="GET">

      <input type="submit" id="submitButton" value="submit">

    </form>

  </body>

  </html>`;

function handleRequest(request, response) {

  // avoid confusing cache behaviors

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

  // PART 1: Return a frame including the FORM and the CSP

  if (request.queryString === "loadframe") {

    response.write(FRAME);

    return;

  // PART 2: We should never get here because the form

  // should not be submitted. Just in case; return

  // something unexpected so the test fails!

  response.write("do'h");