1 files changed, 102 insertions, 0 deletions
diff --git a/dom/file/ipc/TemporaryIPCBlobParent.cpp b/dom/file/ipc/TemporaryIPCBlobParent.cpp
new file mode 100644
index 0000000000..bd2c6beefc
--- /dev/null
+++ b/dom/file/ipc/TemporaryIPCBlobParent.cpp
@@ -0,0 +1,102 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "private/pprio.h"
+#include "TemporaryIPCBlobParent.h"
+#include "mozilla/dom/FileBlobImpl.h"
+#include "nsAnonymousTemporaryFile.h"
+#include "TemporaryFileBlobImpl.h"
+#include "mozilla/dom/IPCBlobUtils.h"
+
+namespace mozilla::dom {
+
+TemporaryIPCBlobParent::TemporaryIPCBlobParent() : mActive(true) {}
+
+TemporaryIPCBlobParent::~TemporaryIPCBlobParent() {
+  // If we still have mFile, let's remove it.
+  if (mFile) {
+    mFile->Remove(false);
+  }
+}
+
+mozilla::ipc::IPCResult TemporaryIPCBlobParent::CreateAndShareFile() {
+  MOZ_ASSERT(mActive);
+  MOZ_ASSERT(!mFile);
+
+  nsresult rv = NS_OpenAnonymousTemporaryNsIFile(getter_AddRefs(mFile));
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return SendDeleteError(rv);
+  }
+
+  PRFileDesc* fd;
+  rv = mFile->OpenNSPRFileDesc(PR_RDWR, PR_IRWXU, &fd);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    return SendDeleteError(rv);
+  }
+
+  FileDescriptor fdd = FileDescriptor(
+      FileDescriptor::PlatformHandleType(PR_FileDesc2NativeHandle(fd)));
+
+  // The FileDescriptor object owns a duplicate of the file handle; we
+  // must close the original (and clean up the NSPR descriptor).
+  PR_Close(fd);
+
+  (void)SendFileDesc(fdd);
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult TemporaryIPCBlobParent::RecvOperationFailed() {
+  MOZ_ASSERT(mActive);
+  mActive = false;
+
+  // Nothing to do.
+  (void)Send__delete__(this, NS_ERROR_FAILURE);
+  return IPC_OK();
+}
+
+mozilla::ipc::IPCResult TemporaryIPCBlobParent::RecvOperationDone(
+    const nsCString& aContentType, const FileDescriptor& aFD) {
+  MOZ_ASSERT(mActive);
+  mActive = false;
+
+  // We have received a file descriptor because in this way we have kept the
+  // file locked on windows during the IPC communication. After the creation of
+  // the TemporaryFileBlobImpl, this prfile can be closed.
+  auto rawFD = aFD.ClonePlatformHandle();
+  PRFileDesc* prfile = PR_ImportFile(PROsfd(rawFD.release()));
+
+  // Let's create the BlobImpl.
+  nsCOMPtr<nsIFile> file = std::move(mFile);
+
+  RefPtr<TemporaryFileBlobImpl> blobImpl =
+      new TemporaryFileBlobImpl(file, NS_ConvertUTF8toUTF16(aContentType));
+
+  PR_Close(prfile);
+
+  IPCBlob ipcBlob;
+  nsresult rv = IPCBlobUtils::Serialize(blobImpl, ipcBlob);
+  if (NS_WARN_IF(NS_FAILED(rv))) {
+    (void)Send__delete__(this, NS_ERROR_FAILURE);
+    return IPC_OK();
+  }
+
+  (void)Send__delete__(this, ipcBlob);
+  return IPC_OK();
+}
+
+void TemporaryIPCBlobParent::ActorDestroy(ActorDestroyReason aWhy) {
+  mActive = false;
+}
+
+mozilla::ipc::IPCResult TemporaryIPCBlobParent::SendDeleteError(nsresult aRv) {
+  MOZ_ASSERT(mActive);
+  mActive = false;
+
+  (void)Send__delete__(this, aRv);
+  return IPC_OK();
+}
+
+}  // namespace mozilla::dom