private async Task DownloadInternal(string fid, Action <Stream> writer)
{
ConnectionAddress connectionAddress;
if (_option.RestOption.EnableReadJwt)
{
var lookupRequest = new LookupRequest(fid, true);
var lookupResponse = await _executer.ExecuteAsync(lookupRequest);
var url = lookupResponse.Locations.FirstOrDefault().Url;
connectionAddress = new ConnectionAddress(url);
}
else
{
var connection = _connectionManager.GetVolumeConnectionByVolumeIdOrFid(fid);
connectionAddress = connection.ConnectionAddress;
}
await Task.Factory.StartNew(() =>
{
var client = GetDownloadClient(connectionAddress);
IRestRequest request = new RestRequest("/{fid}");
request.AddUrlSegment("fid", fid);
request.ResponseWriter = writer;
var response = client.DownloadData(request);
});
}
/// <summary>根据VolumeId(可以是Fid)获取Volume连接
/// </summary>
public Connection GetVolumeConnectionByVolumeIdOrFid(string volumeIdOrFid)
{
//如果是Fid,就转换成VolumeId
if (StringUtil.IsFid(volumeIdOrFid))
{
volumeIdOrFid = StringUtil.GetVolumeId(volumeIdOrFid);
}
if (_volumeIdAddressMappers.TryGetValue(volumeIdOrFid, out ConnectionAddress connectionAddress))
{
return(GetVolumeConnectionInternal(connectionAddress));
}
else
{
var request = new LookupVolumeRequest(volumeIdOrFid);
var task = _seaweedfsExecuter.ExecuteAsync(request);
task.Wait();
//查询Volume返回
var lookupVolumeResponse = task.Result;
if (lookupVolumeResponse.IsSuccessful)
{
//成功
lock (SyncObject)
{
//连接地址
connectionAddress = new ConnectionAddress(lookupVolumeResponse.Locations.FirstOrDefault().Url);
//添加映射
_volumeIdAddressMappers.TryAdd(volumeIdOrFid, connectionAddress);
return(GetVolumeConnectionInternal(connectionAddress));
}
}
else
{
_logger.LogInformation("根据VolumeId获取Volume信息时出错,VolumeId:{0},HttpStatus:{1}", volumeIdOrFid, lookupVolumeResponse.StatusCode);
throw new Exception($"获取Volume信息出错,{lookupVolumeResponse.ErrorMessage}");
}
}
}
/// <summary>获取AssignFid
/// </summary>
/// <param name="replication">同步机制</param>
/// <param name="dataCenter">数据中心</param>
/// <param name="ttl">时效</param>
/// <param name="collection">集合</param>
/// <param name="count">数量</param>
/// <returns><see cref="Seaweedfs.Client.Rest.AssignFileKeyResponse"/></returns>
public async Task <AssignFileKeyResponse> AssignFileKey(string replication = "", int?count = 1, string dataCenter = "", string ttl = "", string collection = "")
{
var request = new AssignFileKeyRequest(replication, count, dataCenter, ttl, collection);
return(await _seaweedfsExecuter.ExecuteAsync(request));
}