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      1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #ifndef CHROME_BROWSER_CHROMEOS_FILE_MANAGER_ZIP_FILE_CREATOR_H_
      6 #define CHROME_BROWSER_CHROMEOS_FILE_MANAGER_ZIP_FILE_CREATOR_H_
      7 
      8 #include "base/callback.h"
      9 #include "base/files/file.h"
     10 #include "base/files/file_path.h"
     11 #include "content/public/browser/utility_process_host_client.h"
     12 
     13 namespace file_manager {
     14 
     15 // ZipFileCreator creates a ZIP file from a specified list of files and
     16 // directories under a common parent directory. This is done in a sandboxed
     17 // subprocess to protect the browser process from handling arbitrary input data
     18 // from untrusted sources.
     19 //
     20 // The class is ref-counted and its ownership is passed around internal callback
     21 // objects and finally to UtilityProcessHost. After the job finishes, the host
     22 // releases the ref-pointer and then ZipFileCreator is automatically deleted.
     23 class ZipFileCreator : public content::UtilityProcessHostClient {
     24  public:
     25   typedef base::Callback<void(bool)> ResultCallback;
     26 
     27   // Creates a zip file from the specified list of files and directories.
     28   ZipFileCreator(const ResultCallback& callback,
     29                  const base::FilePath& src_dir,
     30                  const std::vector<base::FilePath>& src_relative_paths,
     31                  const base::FilePath& dest_file);
     32 
     33   // Starts creating the zip file. Must be called from the UI thread.
     34   // The result will be passed to |callback|. After the task is finished and
     35   // |callback| is run, ZipFileCreator instance is deleted.
     36   void Start();
     37 
     38  private:
     39   friend class ProcessHostClient;
     40 
     41   virtual ~ZipFileCreator();
     42 
     43   // Called after the file handle is opened on blocking pool.
     44   void OnOpenFileHandle(base::File file);
     45 
     46   // Starts the utility process that creates the zip file.
     47   void StartProcessOnIOThread(base::File dest_file);
     48 
     49   // UtilityProcessHostClient
     50   virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
     51   virtual void OnProcessCrashed(int exit_code) OVERRIDE;
     52 
     53   // IPC message handlers.
     54   void OnCreateZipFileSucceeded();
     55   void OnCreateZipFileFailed();
     56 
     57   void ReportDone(bool success);
     58 
     59   // The callback.
     60   ResultCallback callback_;
     61 
     62   // The source directory for input files.
     63   base::FilePath src_dir_;
     64 
     65   // The list of source files paths to be included in the zip file.
     66   // Entries are relative paths under directory |src_dir_|.
     67   std::vector<base::FilePath> src_relative_paths_;
     68 
     69   // The output zip file.
     70   base::FilePath dest_file_;
     71 };
     72 
     73 }  // namespace file_manager
     74 
     75 #endif  // CHROME_BROWSER_CHROMEOS_FILE_MANAGER_ZIP_FILE_CREATOR_H_
     76