/// <summary>
/// 将缓存信息写入流中
/// </summary>
public bool WriteHeader(Stream output)
{
try
{
DiskBasedCache.WriteInt(output, DiskBasedCache.CACHE_MAGIC);
DiskBasedCache.WriteString(output, Key);
DiskBasedCache.WriteString(output, ETag == null ? "" : ETag);
DiskBasedCache.WriteLong(output, ServerDate);
DiskBasedCache.WriteLong(output, LastModified);
DiskBasedCache.WriteLong(output, Ttl);
DiskBasedCache.WriteLong(output, SoftTtl);
DiskBasedCache.WriteStringStringMap(ResponseHeaders, output);
output.Flush();
return(true);
}
catch (Exception e)
{
VolleyLog.D("{0}", e.ToString());
return(false);
}
}
/// <summary>
/// 从流中读取缓存相关信息
/// （当前只提供文件缓存所以是从文件中读取）
/// </summary>
public static CacheHeader ReadHeader(Stream input)
{
CacheHeader entry = new CacheHeader();
int magic = DiskBasedCache.ReadInt(input);
if (magic != DiskBasedCache.CACHE_MAGIC)
{
throw new IOException();
}
entry.Key = DiskBasedCache.ReadString(input);
entry.ETag = DiskBasedCache.ReadString(input);
if (String.IsNullOrEmpty(entry.ETag))
{
entry.ETag = null;
}
entry.ServerDate = DiskBasedCache.ReadLong(input);
entry.LastModified = DiskBasedCache.ReadLong(input);
entry.Ttl = DiskBasedCache.ReadLong(input);
entry.SoftTtl = DiskBasedCache.ReadLong(input);
entry.ResponseHeaders = DiskBasedCache.ReadStringStringMap(input);
return(entry);
}
