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// Copyright (c) 2011 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.
#include "net/disk_cache/cache_util.h"
#include <windows.h>
#include "base/file_util.h"
#include "base/logging.h"
#include "base/message_loop.h"
#include "base/win/scoped_handle.h"
namespace {
// Deletes all the files on path that match search_name pattern.
void DeleteFiles(const wchar_t* path, const wchar_t* search_name) {
std::wstring name(path);
file_util::AppendToPath(&name, search_name);
WIN32_FIND_DATA data;
HANDLE handle = FindFirstFile(name.c_str(), &data);
if (handle == INVALID_HANDLE_VALUE)
return;
std::wstring adjusted_path(path);
adjusted_path += L'\\';
do {
if (data.dwFileAttributes == FILE_ATTRIBUTE_DIRECTORY ||
data.dwFileAttributes == FILE_ATTRIBUTE_REPARSE_POINT)
continue;
std::wstring current(adjusted_path);
current += data.cFileName;
DeleteFile(current.c_str());
} while (FindNextFile(handle, &data));
FindClose(handle);
}
} // namespace
namespace disk_cache {
bool MoveCache(const FilePath& from_path, const FilePath& to_path) {
// I don't want to use the shell version of move because if something goes
// wrong, that version will attempt to move file by file and fail at the end.
if (!MoveFileEx(from_path.value().c_str(), to_path.value().c_str(), 0)) {
LOG(ERROR) << "Unable to move the cache: " << GetLastError();
return false;
}
return true;
}
void DeleteCache(const FilePath& path, bool remove_folder) {
DeleteFiles(path.value().c_str(), L"*");
if (remove_folder)
RemoveDirectory(path.value().c_str());
}
bool DeleteCacheFile(const FilePath& name) {
// We do a simple delete, without ever falling back to SHFileOperation, as the
// version from base does.
if (!DeleteFile(name.value().c_str())) {
// There is an error, but we share delete access so let's see if there is a
// file to open. Note that this code assumes that we have a handle to the
// file at all times (even now), so nobody can have a handle that prevents
// us from opening the file again (unless it was deleted).
DWORD sharing = FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE;
DWORD access = SYNCHRONIZE;
base::win::ScopedHandle file(CreateFile(
name.value().c_str(), access, sharing, NULL, OPEN_EXISTING, 0, NULL));
if (file.IsValid())
return false;
// Most likely there is no file to open... and that's what we wanted.
}
return true;
}
} // namespace disk_cache
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