1 files changed, 61 insertions, 0 deletions
diff --git a/dom/security/test/https-first/file_break_endless_upgrade_downgrade_loop.sjs b/dom/security/test/https-first/file_break_endless_upgrade_downgrade_loop.sjs
new file mode 100644
index 0000000000..eb64c59e97
--- /dev/null
+++ b/dom/security/test/https-first/file_break_endless_upgrade_downgrade_loop.sjs
@@ -0,0 +1,61 @@
+"use strict";
+
+const REDIRECT_URI =
+  "http://example.com/tests/dom/security/test/https-first/file_break_endless_upgrade_downgrade_loop.sjs?verify";
+const DOWNGRADE_URI =
+  "http://example.com/tests/dom/security/test/https-first/file_downgrade_with_different_path.sjs";
+const RESPONSE_ERROR = "unexpected-query";
+
+// An onload postmessage to window opener
+const RESPONSE_HTTPS_SCHEME = `
+  <html>
+  <body>
+  <script type="application/javascript">
+    window.opener.postMessage({result: 'scheme-https'}, '*');
+  </script>
+  </body>
+  </html>`;
+
+const RESPONSE_HTTP_SCHEME = `
+  <html>
+  <body>
+  <script type="application/javascript">
+    window.opener.postMessage({result: 'scheme-http'}, '*');
+  </script>
+  </body>
+  </html>`;
+
+function handleRequest(request, response) {
+  response.setHeader("Cache-Control", "no-cache", false);
+  const query = request.queryString;
+
+  if (query == "downgrade") {
+    // send same-origin downgrade from https: to http: with a different path.
+    // we don't consider it's an endless upgrade downgrade loop in this case.
+    response.setStatusLine(request.httpVersion, 302, "Found");
+    response.setHeader("Location", DOWNGRADE_URI, false);
+    return;
+  }
+
+  // handle the redirect case
+  if ((query >= 301 && query <= 303) || query == 307) {
+    // send same-origin downgrade from https: to http: again simluating
+    // and endless upgrade downgrade loop.
+    response.setStatusLine(request.httpVersion, query, "Found");
+    response.setHeader("Location", REDIRECT_URI, false);
+    return;
+  }
+
+  // Check if scheme is http:// or https://
+  if (query == "verify") {
+    let response_content =
+      request.scheme === "https" ? RESPONSE_HTTPS_SCHEME : RESPONSE_HTTP_SCHEME;
+    response.setStatusLine(request.httpVersion, 200, "OK");
+    response.write(response_content);
+    return;
+  }
+
+  // We should never get here, but just in case ...
+  response.setStatusLine(request.httpVersion, 500, "OK");
+  response.write("unexepcted query");
+}