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1 /*
2  *  Copyright 2006 The WebRTC Project Authors. All rights reserved.
3  *
4  *  Use of this source code is governed by a BSD-style license
5  *  that can be found in the LICENSE file in the root of the source
6  *  tree. An additional intellectual property rights grant can be found
7  *  in the file PATENTS.  All contributing project authors may
8  *  be found in the AUTHORS file in the root of the source tree.
9  */
10 
11 #include "webrtc/base/win32.h"
12 #include <shellapi.h>
13 #include <shlobj.h>
14 #include <tchar.h>
15 
16 #include <time.h>
17 
18 #include "webrtc/base/common.h"
19 #include "webrtc/base/diskcache.h"
20 #include "webrtc/base/pathutils.h"
21 #include "webrtc/base/stream.h"
22 #include "webrtc/base/stringencode.h"
23 #include "webrtc/base/stringutils.h"
24 
25 #include "webrtc/base/diskcache_win32.h"
26 
27 namespace rtc {
28 
InitializeEntries()29 bool DiskCacheWin32::InitializeEntries() {
30   // Note: We could store the cache information in a separate file, for faster
31   // initialization.  Figuring it out empirically works, too.
32 
33   std::wstring path16 = ToUtf16(folder_);
34   path16.append(1, '*');
35 
36   WIN32_FIND_DATA find_data;
37   HANDLE find_handle = FindFirstFile(path16.c_str(), &find_data);
38   if (find_handle != INVALID_HANDLE_VALUE) {
39     do {
40       size_t index;
41       std::string id;
42       if (!FilenameToId(ToUtf8(find_data.cFileName), &id, &index))
43         continue;
44 
45       Entry* entry = GetOrCreateEntry(id, true);
46       entry->size += find_data.nFileSizeLow;
47       total_size_ += find_data.nFileSizeLow;
48       entry->streams = _max(entry->streams, index + 1);
49       FileTimeToUnixTime(find_data.ftLastWriteTime, &entry->last_modified);
50 
51     } while (FindNextFile(find_handle, &find_data));
52 
53     FindClose(find_handle);
54   }
55 
56   return true;
57 }
58 
PurgeFiles()59 bool DiskCacheWin32::PurgeFiles() {
60   std::wstring path16 = ToUtf16(folder_);
61   path16.append(1, '*');
62   path16.append(1, '\0');
63 
64   SHFILEOPSTRUCT file_op = { 0 };
65   file_op.wFunc = FO_DELETE;
66   file_op.pFrom = path16.c_str();
67   file_op.fFlags = FOF_NOCONFIRMATION | FOF_NOERRORUI | FOF_SILENT
68                    | FOF_NORECURSION | FOF_FILESONLY;
69   if (0 != SHFileOperation(&file_op)) {
70     LOG_F(LS_ERROR) << "Couldn't delete cache files";
71     return false;
72   }
73 
74   return true;
75 }
76 
FileExists(const std::string & filename) const77 bool DiskCacheWin32::FileExists(const std::string& filename) const {
78   DWORD result = ::GetFileAttributes(ToUtf16(filename).c_str());
79   return (INVALID_FILE_ATTRIBUTES != result);
80 }
81 
DeleteFile(const std::string & filename) const82 bool DiskCacheWin32::DeleteFile(const std::string& filename) const {
83   return ::DeleteFile(ToUtf16(filename).c_str()) != 0;
84 }
85 
86 }
87