initial version of the headless download manager delegate

headless/lib/browser/headless_download_manager_delegate.h

+// Copyright 2017 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef HEADLESS_LIB_BROWSER_HEADLESS_DOWNLOAD_MANAGER_DELEGATE_H_
+#define HEADLESS_LIB_BROWSER_HEADLESS_DOWNLOAD_MANAGER_DELEGATE_H_
+
+#include <stdint.h>
+
+#include "base/callback_forward.h"
+#include "base/compiler_specific.h"
+#include "base/files/file_util.h"
+#include "base/macros.h"
+#include "base/memory/weak_ptr.h"
+#include "content/public/browser/download_manager_delegate.h"
+
+namespace headless {
+
+class DownloadManager;
+
+class HeadlessDownloadManagerDelegate
+    : public content::DownloadManagerDelegate {
+ public:
+  enum class DownloadBehavior {
+    // All downloads are denied.
+    DENY,
+
+    // All downloads are accepted.
+    ALLOW
+  };
+
+  HeadlessDownloadManagerDelegate();
+  ~HeadlessDownloadManagerDelegate() override;
+
+  void SetDownloadManager(content::DownloadManager* manager);
+
+  void Shutdown() override;
+
+  bool DetermineDownloadTarget(
+      content::DownloadItem* download,
+      const content::DownloadTargetCallback& callback) override;
+
+  bool ShouldOpenDownload(
+      content::DownloadItem* item,
+      const content::DownloadOpenDelayedCallback& callback) override;
+
+  void GetNextId(const content::DownloadIdCallback& callback) override;
+
+  void SetDownloadBehavior(const DownloadBehavior& behavior);

[Sami, 2017/05/19 13:57:26]

nit: Pass by value

+  void SetDownloadDirectory(const base::FilePath& path);
+
+ private:
+  friend class base::RefCountedThreadSafe<HeadlessDownloadManagerDelegate>;
+
+  typedef base::Callback<void(const base::FilePath&)>
+      FilenameDeterminedCallback;
+
+  static void GenerateFilename(const GURL& url,
+                               const std::string& content_disposition,
+                               const std::string& suggested_filename,
+                               const std::string& mime_type,
+                               const base::FilePath& suggested_directory,
+                               const FilenameDeterminedCallback& callback);
+
+  void OnDownloadPathGenerated(uint32_t download_id,
+                               const content::DownloadTargetCallback& callback,
+                               const base::FilePath& suggested_path);
+
+  content::DownloadManager* download_manager_;
+  base::FilePath default_download_path_;
+  DownloadBehavior download_behavior_;
+  base::WeakPtrFactory<HeadlessDownloadManagerDelegate> weak_ptr_factory_;
+
+  DISALLOW_COPY_AND_ASSIGN(HeadlessDownloadManagerDelegate);
+};
+
+}  // namespace headless
+
+#endif  // HEADLESS_LIB_BROWSER_HEADLESS_DOWNLOAD_MANAGER_DELEGATE_H_