1 files changed, 50 insertions, 0 deletions
diff --git a/netwerk/test/browser/early_hint_asset.sjs b/netwerk/test/browser/early_hint_asset.sjs
new file mode 100644
index 0000000000..ba52e757ff
--- /dev/null
+++ b/netwerk/test/browser/early_hint_asset.sjs
@@ -0,0 +1,50 @@
+"use strict";
+
+function handleRequest(request, response) {
+  let hinted =
+    request.hasHeader("X-Moz") && request.getHeader("X-Moz") === "early hint";
+  let count = JSON.parse(getSharedState("earlyHintCount"));
+  if (hinted) {
+    count.hinted += 1;
+  } else {
+    count.normal += 1;
+  }
+  setSharedState("earlyHintCount", JSON.stringify(count));
+
+  let content = "";
+  let qs = new URLSearchParams(request.queryString);
+  let asset = qs.get("as");
+
+  if (qs.get("cached") === "1") {
+    response.setHeader("Cache-Control", "max-age=604800", false);
+  } else {
+    response.setHeader("Cache-Control", "no-cache", false);
+  }
+
+  if (asset === "image") {
+    response.setHeader("Content-Type", "image/png", false);
+    // set to green/black horizontal stripes (71 bytes)
+    content = atob(
+      hinted
+        ? "iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAIAAAD91JpzAAAADklEQVQIW2OU+i/FAAcADoABNV8XGBMAAAAASUVORK5CYII="
+        : "iVBORw0KGgoAAAANSUhEUgAAAAIAAAACCAIAAAD91JpzAAAAE0lEQVQIW2P4//+/N8MkBiAGsgA1bAe1SzDY8gAAAABJRU5ErkJggg=="
+    );
+  } else if (asset === "style") {
+    response.setHeader("Content-Type", "text/css", false);
+    // green background on hint response, purple response otherwise
+    content = `#square { background: ${hinted ? "#1aff1a" : "#4b0092"}`;
+  } else if (asset === "script") {
+    response.setHeader("Content-Type", "application/javascript", false);
+    // green background on hint response, purple response otherwise
+    content = `window.onload = function() {
+      document.getElementById('square').style.background = "${
+        hinted ? "#1aff1a" : "#4b0092"
+      }";
+    }`;
+  } else if (asset === "fetch") {
+    response.setHeader("Content-Type", "text/plain", false);
+    content = hinted ? "hinted" : "normal";
+  }
+
+  response.write(content);
+}