Add binary format support to CefMessageRouter (fixes #3502)

tests/cefclient/browser/binary_transfer_test.cc

@@ -0,0 +1,60 @@
+// Copyright (c) 2023 The Chromium Embedded Framework Authors. All rights
+// reserved. Use of this source code is governed by a BSD-style license that
+// can be found in the LICENSE file.
+
+#include "tests/cefclient/browser/binary_transfer_test.h"
+
+#include <algorithm>
+#include <string>
+
+namespace {
+
+const char kTestUrlPath[] = "/binary_transfer";
+
+// Handle messages in the browser process.
+class Handler final : public CefMessageRouterBrowserSide::Handler {
+ public:
+  // Called due to cefQuery execution in binary_transfer.html.
+  bool OnQuery(CefRefPtr<CefBrowser> browser,
+               CefRefPtr<CefFrame> frame,
+               int64_t query_id,
+               const CefString& request,
+               bool persistent,
+               CefRefPtr<Callback> callback) override {
+    // Only handle messages from the test URL.
+    const std::string& url = frame->GetURL();
+    if (!client::test_runner::IsTestURL(url, kTestUrlPath)) {
+      return false;
+    }
+
+    callback->Success(request);
+    return true;
+  }
+
+  // Called due to cefQuery execution in binary_transfer.html.
+  bool OnQuery(CefRefPtr<CefBrowser> browser,
+               CefRefPtr<CefFrame> frame,
+               int64_t query_id,
+               CefRefPtr<const CefBinaryBuffer> request,
+               bool persistent,
+               CefRefPtr<Callback> callback) override {
+    // Only handle messages from the test URL.
+    const std::string& url = frame->GetURL();
+    if (!client::test_runner::IsTestURL(url, kTestUrlPath)) {
+      return false;
+    }
+
+    callback->Success(request->GetData(), request->GetSize());
+    return true;
+  }
+};
+
+}  // namespace
+
+namespace client::binary_transfer_test {
+
+void CreateMessageHandlers(test_runner::MessageHandlerSet& handlers) {
+  handlers.insert(new Handler());
+}
+
+}  // namespace client::binary_transfer_test