fix: load source maps from custom protocols and asar bundles (#28573)

* fix: load source maps from custom protocols and asar bundles

* chore: fix lint

shell/browser/net/asar/asar_url_loader_factory.cc

@@ -0,0 +1,42 @@
+// Copyright (c) 2021 GitHub, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#include "shell/browser/net/asar/asar_url_loader_factory.h"
+
+#include <utility>
+
+#include "shell/browser/net/asar/asar_url_loader.h"
+
+namespace electron {
+
+// static
+mojo::PendingRemote<network::mojom::URLLoaderFactory>
+AsarURLLoaderFactory::Create() {
+  mojo::PendingRemote<network::mojom::URLLoaderFactory> pending_remote;
+
+  // The AsarURLLoaderFactory will delete itself when there are no more
+  // receivers - see the SelfDeletingURLLoaderFactory::OnDisconnect method.
+  new AsarURLLoaderFactory(pending_remote.InitWithNewPipeAndPassReceiver());
+
+  return pending_remote;
+}
+
+AsarURLLoaderFactory::AsarURLLoaderFactory(
+    mojo::PendingReceiver<network::mojom::URLLoaderFactory> factory_receiver)
+    : network::SelfDeletingURLLoaderFactory(std::move(factory_receiver)) {}
+AsarURLLoaderFactory::~AsarURLLoaderFactory() = default;
+
+void AsarURLLoaderFactory::CreateLoaderAndStart(
+    mojo::PendingReceiver<network::mojom::URLLoader> loader,
+    int32_t routing_id,
+    int32_t request_id,
+    uint32_t options,
+    const network::ResourceRequest& request,
+    mojo::PendingRemote<network::mojom::URLLoaderClient> client,
+    const net::MutableNetworkTrafficAnnotationTag& traffic_annotation) {
+  asar::CreateAsarURLLoader(request, std::move(loader), std::move(client),
+                            new net::HttpResponseHeaders(""));
+}
+
+}  // namespace electron

shell/browser/net/asar/asar_url_loader_factory.h

@@ -0,0 +1,38 @@
+// Copyright (c) 2021 GitHub, Inc.
+// Use of this source code is governed by the MIT license that can be
+// found in the LICENSE file.
+
+#ifndef SHELL_BROWSER_NET_ASAR_ASAR_URL_LOADER_FACTORY_H_
+#define SHELL_BROWSER_NET_ASAR_ASAR_URL_LOADER_FACTORY_H_
+
+#include "mojo/public/cpp/bindings/pending_receiver.h"
+#include "mojo/public/cpp/bindings/pending_remote.h"
+#include "services/network/public/cpp/self_deleting_url_loader_factory.h"
+
+namespace electron {
+
+// Provide support for accessing asar archives in file:// protocol.
+class AsarURLLoaderFactory : public network::SelfDeletingURLLoaderFactory {
+ public:
+  static mojo::PendingRemote<network::mojom::URLLoaderFactory> Create();
+
+ private:
+  AsarURLLoaderFactory(
+      mojo::PendingReceiver<network::mojom::URLLoaderFactory> factory_receiver);
+  ~AsarURLLoaderFactory() override;
+
+  // network::mojom::URLLoaderFactory:
+  void CreateLoaderAndStart(
+      mojo::PendingReceiver<network::mojom::URLLoader> loader,
+      int32_t routing_id,
+      int32_t request_id,
+      uint32_t options,
+      const network::ResourceRequest& request,
+      mojo::PendingRemote<network::mojom::URLLoaderClient> client,
+      const net::MutableNetworkTrafficAnnotationTag& traffic_annotation)
+      override;
+};
+
+}  // namespace electron
+
+#endif  // SHELL_BROWSER_NET_ASAR_ASAR_URL_LOADER_FACTORY_H_