FastDFS客户端可以帮助我们很方便的连接DFS服务器，将封装好的SOCKET命令发送到服务器端，DFS只提供linux环境下的服务器端，暂不支持WINDOWS系统，我们做.net开始，可以选择C#版的FastDFS客户端，自己可以根据自己的需要再去完善它。
我的改造：
为了调用方便，我把与tracker连接的工作放到了DFS客户端上，并且为它分配默认的组
public class FastDFSClient { #region Constructors static List<IPEndPoint> trackerIPs = new List<IPEndPoint>(); static IPEndPoint endPoint; public static StorageNode DefaultGroup; /// <summary> /// 当前默认的组，节，卷名称 /// 开发人员可以通过FastDFSClient.GetStorageNode("groupname")去指定自己的组 /// </summary> static FastDFSClient() { trackerIPs = new List<IPEndPoint>(); endPoint = new IPEndPoint( IPAddress.Parse(FastDFSManager.Instance.Host), FastDFSManager.Instance.Port); trackerIPs.Add(endPoint); ConnectionManager.Initialize(trackerIPs); DefaultGroup = FastDFSClient.GetStorageNode(FastDFSManager.Instance.GroupName); } #endregion
对于开始人员来说，在调用时，可以这样完成上传，下载等操作，看代码：
/* FastDFS Test */ //===========================UploadFile===================================== byte[] content = null; FileStream streamUpload = new FileStream(@"c:\resource\video.mp4", FileMode.Open); using (BinaryReader reader = new BinaryReader(streamUpload)) { content = reader.ReadBytes((int)streamUpload.Length); } string fileName = FastDFSClient.UploadFile(FastDFSClient.DefaultGroup, content, "doc"); Console.ReadKey();
下面我把FastDFSClient类的源代码公开一下，大家看了后有问题，再提出来，大家再一起解决。
namespace FastDFS.Client { /// <summary> /// FastDFS客户端 /// </summary> public class FastDFSClient { #region Constructors static List<IPEndPoint> trackerIPs = new List<IPEndPoint>(); static IPEndPoint endPoint; public static StorageNode DefaultGroup; /// <summary> /// 当前默认的组，节，卷名称 /// 开发人员可以通过FastDFSClient.GetStorageNode("groupname")去指定自己的组 /// </summary> static FastDFSClient() { trackerIPs = new List<IPEndPoint>(); endPoint = new IPEndPoint( IPAddress.Parse(FastDFSManager.Instance.Host), FastDFSManager.Instance.Port); trackerIPs.Add(endPoint); ConnectionManager.Initialize(trackerIPs); DefaultGroup = FastDFSClient.GetStorageNode(FastDFSManager.Instance.GroupName); } #endregion /// <summary> /// 获取存储节点 /// </summary> /// <param name="groupName">组名</param> /// <returns>存储节点实体类</returns> public static StorageNode GetStorageNode(string groupName) { FDFSRequest trackerRequest = QUERY_STORE_WITH_GROUP_ONE.Instance.GetRequest(groupName); QUERY_STORE_WITH_GROUP_ONE.Response trackerResponse = new QUERY_STORE_WITH_GROUP_ONE.Response(trackerRequest.GetResponse()); IPEndPoint storeEndPoint = new IPEndPoint(IPAddress.Parse(trackerResponse.IPStr), trackerResponse.Port); StorageNode result = new StorageNode(); result.GroupName = trackerResponse.GroupName; result.EndPoint = storeEndPoint; result.StorePathIndex = trackerResponse.StorePathIndex; return result; } /// <summary> /// 上传文件 /// </summary> /// <param name="storageNode">GetStorageNode方法返回的存储节点</param> /// <param name="contentByte">文件内容</param> /// <param name="fileExt">文件扩展名(注意:不包含".")</param> /// <returns>文件名</returns> public static string UploadFile(StorageNode storageNode, byte[] contentByte, string fileExt) { FDFSRequest storageReqeust = UPLOAD_FILE.Instance.GetRequest(storageNode.EndPoint, storageNode.StorePathIndex, contentByte.Length, fileExt, contentByte); UPLOAD_FILE.Response storageResponse = new UPLOAD_FILE.Response(storageReqeust.GetResponse()); return storageResponse.FileName; } /// <summary> /// 上传从文件 /// </summary> /// <param name="storageNode">GetStorageNode方法返回的存储节点</param> /// <param name="contentByte">文件内容</param> /// <param name="master_filename">主文件名</param> /// <param name="prefix_name">从文件后缀</param> /// <param name="fileExt">文件扩展名(注意:不包含".")</param> /// <returns>文件名</returns> public static string UploadSlaveFile(string groupName, byte[] contentByte, string master_filename, string prefix_name, string fileExt) { FDFSRequest trackerRequest = QUERY_UPDATE.Instance.GetRequest(groupName, master_filename); QUERY_UPDATE.Response trackerResponse = new QUERY_UPDATE.Response(trackerRequest.GetResponse()); IPEndPoint storeEndPoint = new IPEndPoint(IPAddress.Parse(trackerResponse.IPStr), trackerResponse.Port); FDFSRequest storageReqeust = UPLOAD_SLAVE_FILE.Instance.GetRequest(storeEndPoint, contentByte.Length, master_filename, prefix_name, fileExt, contentByte); UPLOAD_FILE.Response storageResponse = new UPLOAD_FILE.Response(storageReqeust.GetResponse()); return storageResponse.FileName; } /// <summary> /// 上传可以Append的文件 /// </summary> /// <param name="storageNode">GetStorageNode方法返回的存储节点</param> /// <param name="contentByte">文件内容</param> /// <param name="fileExt">文件扩展名(注意:不包含".")</param> /// <returns>文件名</returns> public static string UploadAppenderFile(StorageNode storageNode, byte[] contentByte, string fileExt) { FDFSRequest storageReqeust = UPLOAD_APPEND_FILE.Instance.GetRequest(storageNode.EndPoint, storageNode.StorePathIndex, contentByte.Length, fileExt, contentByte); UPLOAD_APPEND_FILE.Response storageResponse = new UPLOAD_APPEND_FILE.Response(storageReqeust.GetResponse()); return storageResponse.FileName; } /// <summary> /// 附加文件 /// </summary> /// <param name="groupName">组名</param> /// <param name="fileName">文件名</param> /// <param name="contentByte">文件内容</param> public static void AppendFile(string groupName, string fileName, byte[] contentByte) { FDFSRequest trackerRequest = QUERY_UPDATE.Instance.GetRequest(groupName, fileName); QUERY_UPDATE.Response trackerResponse = new QUERY_UPDATE.Response(trackerRequest.GetResponse()); IPEndPoint storeEndPoint = new IPEndPoint(IPAddress.Parse(trackerResponse.IPStr), trackerResponse.Port); FDFSRequest storageReqeust = APPEND_FILE.Instance.GetRequest(storeEndPoint, fileName, contentByte); storageReqeust.GetResponse(); } /// <summary> /// 删除文件 /// </summary> /// <param name="groupName">组名</param> /// <param name="fileName">文件名</param> public static void RemoveFile(string groupName, string fileName) { FDFSRequest trackerRequest = QUERY_UPDATE.Instance.GetRequest(groupName, fileName); QUERY_UPDATE.Response trackerResponse = new QUERY_UPDATE.Response(trackerRequest.GetResponse()); IPEndPoint storeEndPoint = new IPEndPoint(IPAddress.Parse(trackerResponse.IPStr), trackerResponse.Port); FDFSRequest storageReqeust = DELETE_FILE.Instance.GetRequest(storeEndPoint, groupName, fileName); storageReqeust.GetResponse(); } /// <summary> /// 下载文件 /// </summary> /// <param name="storageNode">GetStorageNode方法返回的存储节点</param> /// <param name="fileName">文件名</param> /// <returns>文件内容</returns> public static byte[] DownloadFile(StorageNode storageNode, string fileName) { FDFSRequest storageReqeust = DOWNLOAD_FILE.Instance.GetRequest(storageNode.EndPoint, 0L, 0L, storageNode.GroupName, fileName); DOWNLOAD_FILE.Response storageResponse = new DOWNLOAD_FILE.Response(storageReqeust.GetResponse()); return storageResponse.Content; } /// <summary> /// 增量下载文件 /// </summary> /// <param name="storageNode">GetStorageNode方法返回的存储节点</param> /// <param name="fileName">文件名</param> /// <param name="offset">从文件起始点的偏移量</param> /// <param name="length">要读取的字节数</param> /// <returns>文件内容</returns> public static byte[] DownloadFile(StorageNode storageNode, string fileName, long offset, long length) { FDFSRequest storageReqeust = DOWNLOAD_FILE.Instance.GetRequest(storageNode.EndPoint, offset, length, storageNode.GroupName, fileName); DOWNLOAD_FILE.Response storageResponse = new DOWNLOAD_FILE.Response(storageReqeust.GetResponse()); return storageResponse.Content; } /// <summary> /// 获取文件信息 /// </summary> /// <param name="storageNode">GetStorageNode方法返回的存储节点</param> /// <param name="fileName">文件名</param> /// <returns></returns> public static FDFSFileInfo GetFileInfo(StorageNode storageNode, string fileName) { FDFSRequest storageReqeust = QUERY_FILE_INFO.Instance.GetRequest(storageNode.EndPoint, storageNode.GroupName, fileName); FDFSFileInfo result = new FDFSFileInfo(storageReqeust.GetResponse()); return result; } } }
本文转自博客园张占岭（仓储大叔）的博客，原文链接：品味FastDFS~第二回 FastDFS客户端的使用，如需转载请自行联系原博主。
