/// <summary>
/// 初始化缓存
/// </summary>
public void Initialize()
{
lock (this)
{
if (!mRootDirectory.Exists)
{
mRootDirectory.Create();
if (!mRootDirectory.Exists)
{
VolleyLog.E("Unable to create cache dir {0}", mRootDirectory.FullName);
}
return;
}
//获取已缓存文件并添加到缓存表中
FileInfo[] files = mRootDirectory.GetFiles();
if (files == null)
{
return;
}
foreach (FileInfo file in files)
{
FileStream fs = null;
try
{
fs = file.Open(FileMode.OpenOrCreate);
CacheHeader entry = CacheHeader.ReadHeader(fs);
entry.Size = fs.Length;
PutEntry(entry.Key, entry);
}
catch (IOException)
{
if (file != null)
{
file.Delete();
}
}
finally
{
try
{
if (fs != null)
{
fs.Close();
}
}
catch (IOException) { }
}
}
}
}
/// <summary>
/// 获取缓存数据
/// </summary>
public Entry Get(string key)
{
lock (this)
{
CacheHeader entry = null;
mEntries.TryGetValue(key, out entry);
if (entry == null)
{
return(null);
}
FileInfo file = GetFileForKey(key);
FileStream fs = null;
try
{
fs = file.Open(FileMode.OpenOrCreate);
CacheHeader.ReadHeader(fs);
byte[] data = StreamToBytes(fs, (int)(fs.Length - fs.Position));
return(entry.ToCacheEntry(data));
}
catch (IOException e)
{
VolleyLog.D("{0}:{1}", file.FullName, e.ToString());
}
finally
{
if (fs != null)
{
try
{
fs.Close();
}
catch (IOException) { }
}
}
return(null);
}
}
