//--------------------------------------------------
/// 构造函数
//--------------------------------------------------
public CHttpFileCacher(int max, string folderName, string fileExtension)
{
m_maxCnt = max;
m_dir = GetCacheDirectory(folderName.ToLower());
m_metaFilePath = CFileManager.CombinePath(m_dir, folderName.ToLower() + ".bytes");
m_fileExtension = fileExtension;
m_cachedFileInfoSet = new CCachedFileInfoSet();
MakeDirReady();
if (CFileManager.IsFileExist(m_metaFilePath))
{
byte[] buffer = CFileManager.LockFileBuffer();
try
{
uint fileLength = CFileManager.ReadFile(m_metaFilePath, buffer, (uint)buffer.Length);
int offset = 0;
int ret = m_cachedFileInfoSet.Read(buffer, offset, fileLength);
if (ret < 0) //读取出错时，删除所有文件
{
Debug.LogError("读取出错，删除所有文件");
CFileManager.ClearDirectory(m_dir);
}
}
finally
{
CFileManager.UnLockFileBuffer();
}
}
}
//--------------------------------------------------
/// 添加缓存文件
/// @url
/// @cacheType
/// @width
/// @height
/// @isGif
/// @data
//--------------------------------------------------
public void AddFile(string url, byte[] data, int tagInt1 = 0, int tagInt2 = 0, bool tagBool = false)
{
string key = CFileManager.GetMd5(url.ToLower());
List <CCachedFileInfo> cachedFileInfoList = m_cachedFileInfoSet.m_cachedFileInfos;
if (cachedFileInfoList == null)
{
return;
}
if (m_cachedFileInfoSet.m_cachedFileInfoMap.ContainsKey(key))
{
CCachedFileInfo cachedFileInfo = null;
m_cachedFileInfoSet.m_cachedFileInfoMap.TryGetValue(key, out cachedFileInfo);
Debug.Assert(cachedFileInfoList != null && cachedFileInfoList.Contains(cachedFileInfo), "zen me ke neng?");
//修改信息
cachedFileInfo.m_fileLength = data.Length;
cachedFileInfo.m_lastModifyTime = DateTime.Now;
cachedFileInfo.m_tagInt1 = tagInt1;
cachedFileInfo.m_tagInt2 = tagInt2;
cachedFileInfo.m_tagBool = tagBool;
}
else
{
//如果数量达到上限，移除排在最前面的文件
if (cachedFileInfoList.Count >= m_maxCnt)
{
string removeKey = m_cachedFileInfoSet.RemoveEarliestFileInfo();
//删除缓存文件
if (!string.IsNullOrEmpty(removeKey))
{
string removeCachedFileFullPath = CFileManager.CombinePath(m_dir, removeKey + m_fileExtension);
if (CFileManager.IsFileExist(removeCachedFileFullPath))
{
CFileManager.DeleteFile(removeCachedFileFullPath);
}
}
}
CCachedFileInfo cachedFileInfo = new CCachedFileInfo();
cachedFileInfo.m_key = key;
cachedFileInfo.m_fileLength = data.Length;
cachedFileInfo.m_lastModifyTime = DateTime.Now;
cachedFileInfo.m_tagInt1 = tagInt1;
cachedFileInfo.m_tagInt2 = tagInt2;
cachedFileInfo.m_tagBool = tagBool;
m_cachedFileInfoSet.AddFileInfo(key, cachedFileInfo);
}
//排序
m_cachedFileInfoSet.m_cachedFileInfos.Sort();
//写入信息文件
byte[] buffer = CFileManager.LockFileBuffer();
try
{
MakeDirReady();
int offset = 0;
m_cachedFileInfoSet.Write(buffer, ref offset);
if (CFileManager.IsFileExist(m_metaFilePath))
{
CFileManager.DeleteFile(m_metaFilePath);
}
CFileManager.WriteFile(m_metaFilePath, buffer, 0, offset);
}
finally
{
CFileManager.UnLockFileBuffer();
}
//写入数据文件
string cachedFileFullPath = CFileManager.CombinePath(m_dir, key + m_fileExtension);
if (CFileManager.IsFileExist(cachedFileFullPath))
{
CFileManager.DeleteFile(cachedFileFullPath);
}
CFileManager.WriteFile(cachedFileFullPath, data);
}