1 files changed, 26 insertions, 0 deletions
diff --git a/dom/security/test/https-first/file_slow_download.sjs b/dom/security/test/https-first/file_slow_download.sjs
new file mode 100644
index 0000000000..6e4f109068
--- /dev/null
+++ b/dom/security/test/https-first/file_slow_download.sjs
@@ -0,0 +1,26 @@
+"use strict";
+let timer;
+
+// Send a part of the file then wait for 3 second before sending the rest.
+// If download isn't exempt from background timer of https-only/-first then the download
+// gets cancelled before it completed.
+const DELAY_MS = 3500;
+function handleRequest(request, response) {
+  response.processAsync();
+  timer = Cc["@mozilla.org/timer;1"].createInstance(Ci.nsITimer);
+  response.setHeader("Cache-Control", "no-cache", false);
+  response.setHeader(
+    "Content-Disposition",
+    "attachment; filename=large-dummy-file.txt"
+  );
+  response.setHeader("Content-Type", "text/plain");
+  response.write("Begin the file");
+  timer.init(
+    () => {
+      response.write("End of file");
+      response.finish();
+    },
+    DELAY_MS,
+    Ci.nsITimer.TYPE_ONE_SHOT
+  );
+}