1 files changed, 37 insertions, 0 deletions
diff --git a/netwerk/test/browser/early_hint_pixel.sjs b/netwerk/test/browser/early_hint_pixel.sjs
new file mode 100644
index 0000000000..56a64e9af2
--- /dev/null
+++ b/netwerk/test/browser/early_hint_pixel.sjs
@@ -0,0 +1,37 @@
+"use strict";
+
+function handleRequest(request, response) {
+  response.setHeader("Content-Type", "image/png", false);
+  response.setHeader("Cache-Control", "max-age=604800", false);
+
+  // the typo in "Referer" is part of the http spec
+  if (request.hasHeader("Referer")) {
+    setSharedState("requestReferrer", request.getHeader("Referer"));
+  } else {
+    setSharedState("requestReferrer", "");
+  }
+
+  let count = JSON.parse(getSharedState("earlyHintCount"));
+  let image;
+  // send different sized images depending whether this is an early hint request
+  if (
+    request.hasHeader("X-Moz") &&
+    request.getHeader("X-Moz") === "early hint"
+  ) {
+    count.hinted += 1;
+    // set to green/black horizontal stripes (71 bytes)
+    image = atob(
+      "iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAIAAAD91JpzAAAADklEQVQIW2OU+i/FAAcADoABNV8X" +
+        "GBMAAAAASUVORK5CYII="
+    );
+  } else {
+    count.normal += 1;
+    // set to purple/white checkered pattern (76 bytes)
+    image = atob(
+      "iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAIAAAD91JpzAAAAE0lEQVQIW2P4//+/N8MkBiAGsgA1" +
+        "bAe1SzDY8gAAAABJRU5ErkJggg=="
+    );
+  }
+  setSharedState("earlyHintCount", JSON.stringify(count));
+  response.write(image);
+}