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Side by Side Diff: content/browser/loader/temporary_file_manager.h

Issue 82273002: Fix various issues in RedirectToFileResourceHandler. (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: Comment Created 7 years ago
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1 // Copyright 2013 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 CONTENT_BROWSER_LOADER_TEMPORARY_FILE_MANAGER_H_
6 #define CONTENT_BROWSER_LOADER_TEMPORARY_FILE_MANAGER_H_
7
8 #include "base/basictypes.h"
9 #include "base/compiler_specific.h"
10 #include "base/memory/ref_counted.h"
11 #include "base/memory/weak_ptr.h"
12 #include "content/browser/loader/redirect_to_file_resource_handler.h"
13 #include "content/public/browser/global_request_id.h"
14
15 namespace content {
16
17 // This class manages temporary files for RedirectToFileResourceHandler and the
18 // ResourceDispatcherHost. It vends temporary files for resource requests and
19 // arranges them to be readable by child processes. The TemporaryFileManager
20 // retains references to each temporary on the child process's behalf. When both
21 // the child process and the RedirectToFileResourceHandler have released the
22 // file, it is deleted.
23 class TemporaryFileManager : public RedirectToFileResourceHandler::Delegate {
24 public:
25 TemporaryFileManager();
26 virtual ~TemporaryFileManager();
27
28 // Called when child process |child_id| has released the temporary attached to
29 // |request_id|.
30 void UnregisterDownloadedTempFile(int child_id, int request_id);
31
32 // Called when child process |child_id| dies. Releases all temporaries managed
33 // by the child. Note: to resolve races where the child dies while a
34 // CreateTemporary is pending, all RedirectToFileResourceHandlers for
35 // |child_id| must be destroyed before calling this function.
36 void UnregisterFilesForChild(int child_id);
37
38 // RedirectToFileResourceHandler::Delegate implementation:
39 virtual void CreateTemporary(
40 int child_id,
41 int request_id,
42 base::WeakPtr<RedirectToFileResourceHandler> handler) OVERRIDE;
43
44 private:
45 void DidCreateTemporaryFile(
46 int child_id,
47 int request_id,
48 base::WeakPtr<RedirectToFileResourceHandler> handler,
49 base::PlatformFileError error_code,
50 base::PassPlatformFile file_handle,
51 const base::FilePath& file_path);
52
53 void RegisterDownloadedTempFile(
54 int child_id,
55 int request_id,
56 webkit_blob::ShareableFileReference* reference);
57
58 // Collection of temp files downloaded for child processes via
59 // the download_to_file mechanism. We avoid deleting them until
60 // the client no longer needs them.
61 typedef std::map<int, scoped_refptr<webkit_blob::ShareableFileReference> >
62 DeletableFilesMap; // key is request id
63 typedef std::map<int, DeletableFilesMap>
64 RegisteredTempFiles; // key is child process id
65 RegisteredTempFiles registered_temp_files_;
66
67 base::WeakPtrFactory<TemporaryFileManager> weak_factory_;
68
69 DISALLOW_COPY_AND_ASSIGN(TemporaryFileManager);
70 };
71
72 } // namespace content
73
74 #endif // CONTENT_BROWSER_LOADER_TEMPORARY_FILE_MANAGER_H_
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