1 files changed, 64 insertions, 0 deletions
diff --git a/netwerk/test/browser/early_hint_main_html.sjs b/netwerk/test/browser/early_hint_main_html.sjs
new file mode 100644
index 0000000000..8867aa8754
--- /dev/null
+++ b/netwerk/test/browser/early_hint_main_html.sjs
@@ -0,0 +1,64 @@
+"use strict";
+
+function handleRequest(request, response) {
+  Cu.importGlobalProperties(["URLSearchParams"]);
+
+  // write to raw socket
+  response.seizePower();
+
+  let qs = new URLSearchParams(request.queryString);
+  let imgs = [];
+  let new_hint = true;
+  let new_header = true;
+  for (const [imgUrl, uuid] of qs.entries()) {
+    if (new_hint) {
+      // we need to write a new header
+      new_hint = false;
+      response.write("HTTP/1.1 103 Early Hint\r\n");
+    }
+    if (!imgUrl.length) {
+      // next hint in new early hint response when empty string is passed
+      new_header = true;
+      if (uuid === "new_response") {
+        new_hint = true;
+        response.write("\r\n");
+      } else if (uuid === "non_link_header") {
+        response.write("Content-Length: 25\r\n");
+      }
+      response.write("\r\n");
+    } else {
+      // either append link in new header or in same header
+      if (new_header) {
+        new_header = false;
+        response.write("Link: ");
+      } else {
+        response.write(", ");
+      }
+      // add query string to make request unique this has the drawback that
+      // the preloaded image can't accept query strings on it's own / or has
+      // to strip the appended "?uuid" from the query string before parsing
+      imgs.push(`<img src="${imgUrl}?${uuid}" width="100px">`);
+      response.write(`<${imgUrl}?${uuid}>; rel=preload; as=image`);
+    }
+  }
+  if (!new_hint) {
+    // add separator to main document
+    response.write("\r\n\r\n");
+  }
+
+  let body = `<!DOCTYPE html>
+<html>
+<body>
+${imgs.join("\n")}
+</body>
+</html>`;
+
+  // main document response
+  response.write("HTTP/1.1 200 OK\r\n");
+  response.write("Content-Type: text/html;charset=utf-8\r\n");
+  response.write("Cache-Control: no-cache\r\n");
+  response.write(`Content-Length: ${body.length}\r\n`);
+  response.write("\r\n");
+  response.write(body);
+  response.finish();
+}