/// <summary>
/// receive pack header
/// </summary>
/// <param name="input">input stream</param>
/// <param name="expectCmd">expect response command</param>
/// <param name="expectBodyLen">expect response package body length</param>
/// <returns>errno and pkg body length</returns>
public static RecvHeaderInfo RecvHeader(Stream input, byte expectCmd, long expectBodyLen)
{
byte[] header;
int bytes;
long pkgLen;
header = new byte[FdfsProtoPkgLenSize + 2];
if ((bytes = input.Read(header, 0, header.Length)) != header.Length)
{
throw new IOException("recv package size " + bytes + " != " + header.Length);
}
if (header[ProtoHeaderCmdIndex] != expectCmd)
{
throw new IOException("recv cmd: " + header[ProtoHeaderCmdIndex] + " is not correct, expect cmd: " + expectCmd);
}
if (header[ProtoHeaderStatusIndex] != 0)
{
return(new RecvHeaderInfo(header[ProtoHeaderStatusIndex], 0));
}
//pkg_len = BitConverter.ToInt64(header, 0);
pkgLen = ProtoCommon.Buff2Long(header, 0);
if (pkgLen < 0)
{
throw new IOException("recv body length: " + pkgLen + " < 0!");
}
if (expectBodyLen >= 0 && pkgLen != expectBodyLen)
{
throw new IOException("recv body length: " + pkgLen + " is not correct, expect length: " + expectBodyLen);
}
return(new RecvHeaderInfo((byte)0, pkgLen));
}
/**
* delete a storage server from the tracker server
*
* @param trackerServer the connected tracker server
* @param groupName the group name of storage server
* @param storageIpAddr the storage server ip address
* @return true for success, false for fail
*/
private bool deleteStorage(TrackerServer trackerServer,
String groupName, String storageIpAddr)
{
byte[]
header;
byte[]
bGroupName;
byte[]
bs;
int len;
Socket trackerSocket;
trackerSocket = trackerServer.getSocket();
using (var outputStream = new NetworkStream(trackerSocket))
{
bs = _encoding.GetBytes(groupName);
bGroupName = new byte[ProtoCommon.FDFS_GROUP_NAME_MAX_LEN];
if (bs.Length <= ProtoCommon.FDFS_GROUP_NAME_MAX_LEN)
{
len = bs.Length;
}
else
{
len = ProtoCommon.FDFS_GROUP_NAME_MAX_LEN;
}
bGroupName.Fill <byte>(0);
Array.Copy(bs, 0, bGroupName, 0, len);
int ipAddrLen;
byte[] bIpAddr = _encoding.GetBytes(storageIpAddr);
if (bIpAddr.Length < ProtoCommon.FDFS_IPADDR_SIZE)
{
ipAddrLen = bIpAddr.Length;
}
else
{
ipAddrLen = ProtoCommon.FDFS_IPADDR_SIZE - 1;
}
header = ProtoCommon.packHeader(ProtoCommon.TRACKER_PROTO_CMD_SERVER_DELETE_STORAGE,
ProtoCommon.FDFS_GROUP_NAME_MAX_LEN + ipAddrLen, (byte)0);
byte[] wholePkg = new byte[header.Length + bGroupName.Length + ipAddrLen];
Array.Copy(header, 0, wholePkg, 0, header.Length);
Array.Copy(bGroupName, 0, wholePkg, header.Length, bGroupName.Length);
Array.Copy(bIpAddr, 0, wholePkg, header.Length + bGroupName.Length, ipAddrLen);
outputStream.Write(wholePkg, 0, wholePkg.Length);
ProtoCommon.RecvPackageInfo pkgInfo = ProtoCommon.recvPackage(outputStream,
ProtoCommon.TRACKER_PROTO_CMD_RESP, 0);
this.errno = pkgInfo.errno;
return(pkgInfo.errno == 0);
}
}
public void close()
{
if (this.sock != null)
{
try
{
ProtoCommon.closeSocket(this.sock);
}
finally
{
this.sock = null;
}
}
}
/// <summary>
/// pack header by FastDFS transfer protocol
/// </summary>
/// <param name="cmd">which command to send</param>
/// <param name="pkgLen">package body length</param>
/// <param name="errno">status code, should be (byte)0</param>
/// <returns>packed byte buffer</returns>
public static byte[] PackHeader(byte cmd, long pkgLen, byte errno)
{
byte[] header;
byte[] hexLen;
header = new byte[FdfsProtoPkgLenSize + 2];
for (int i = 0; i < header.Length; i++)
{
header[i] = (byte)0;
}
//hex_len = BitConverter.GetBytes(pkg_len);
hexLen = ProtoCommon.Long2Buff(pkgLen);
Array.Copy(hexLen, 0, header, 0, hexLen.Length);
header[ProtoHeaderCmdIndex] = cmd;
header[ProtoHeaderStatusIndex] = errno;
return(header);
}
/**
* receive pack header
*
* @param in input stream
* @param expect_cmd expect response command
* @param expect_body_len expect response package body length
* @return RecvHeaderInfo: errno and pkg body length
*/
public static RecvHeaderInfo recvHeader(Stream inputStream, byte expect_cmd, long expect_body_len)
{
byte[] header;
int bytes;
long pkg_len;
header = new byte[FDFS_PROTO_PKG_LEN_SIZE + 2];
if ((bytes = inputStream.Read(header, 0, header.Length)) != header.Length)
{
throw new IOException("recv package size " + bytes + " != " + header.Length);
}
if (header[PROTO_HEADER_CMD_INDEX] != expect_cmd)
{
throw new IOException("recv cmd: " + header[PROTO_HEADER_CMD_INDEX] + " is not correct, expect cmd: " +
expect_cmd);
}
if (header[PROTO_HEADER_STATUS_INDEX] != 0)
{
return(new RecvHeaderInfo(header[PROTO_HEADER_STATUS_INDEX], 0));
}
pkg_len = ProtoCommon.buff2long(header, 0);
if (pkg_len < 0)
{
throw new IOException("recv body length: " + pkg_len + " < 0!");
}
if (expect_body_len >= 0 && pkg_len != expect_body_len)
{
throw new IOException("recv body length: " + pkg_len + " is not correct, expect length: " +
expect_body_len);
}
return(new RecvHeaderInfo(0, pkg_len));
}
protected DateTime dateValue(byte[] bs, int offset, FieldInfo filedInfo)
{
return(DateTimeOffset.FromUnixTimeMilliseconds(
ProtoCommon.buff2long(bs, offset + filedInfo.offset) * 1000).DateTime);
}
protected int int32Value(byte[] bs, int offset, FieldInfo filedInfo)
{
return(ProtoCommon.buff2int(bs, offset + filedInfo.offset));
}
protected int intValue(byte[] bs, int offset, FieldInfo filedInfo)
{
return((int)ProtoCommon.buff2long(bs, offset + filedInfo.offset));
}
/**
* query storage server to upload file
*
* @param trackerServer the tracker server
* @param groupName the group name to upload file to, can be empty
* @return storage server object, return null if fail
*/
public StorageServer getStoreStorage(TrackerServer trackerServer, String groupName)
{
byte[] header;
String ip_addr;
int port;
byte cmd;
int out_len;
bool bNewConnection;
byte store_path;
Socket trackerSocket;
if (trackerServer == null)
{
trackerServer = getConnection();
if (trackerServer == null)
{
return(null);
}
bNewConnection = true;
}
else
{
bNewConnection = false;
}
trackerSocket = trackerServer.getSocket();
var outputStream = new NetworkStream(trackerSocket);
try
{
if (groupName == null || groupName.Length == 0)
{
cmd = ProtoCommon.TRACKER_PROTO_CMD_SERVICE_QUERY_STORE_WITHOUT_GROUP_ONE;
out_len = 0;
}
else
{
cmd = ProtoCommon.TRACKER_PROTO_CMD_SERVICE_QUERY_STORE_WITH_GROUP_ONE;
out_len = ProtoCommon.FDFS_GROUP_NAME_MAX_LEN;
}
header = ProtoCommon.packHeader(cmd, out_len, (byte)0);
outputStream.Write(header, 0, header.Length);
var encoder = Encoding.GetEncoding(ClientGlobal.g_charset);
if (groupName != null && groupName.Length > 0)
{
byte[] bGroupName;
byte[] bs;
int group_len;
bs = encoder.GetBytes(groupName);
bGroupName = new byte[ProtoCommon.FDFS_GROUP_NAME_MAX_LEN];
if (bs.Length <= ProtoCommon.FDFS_GROUP_NAME_MAX_LEN)
{
group_len = bs.Length;
}
else
{
group_len = ProtoCommon.FDFS_GROUP_NAME_MAX_LEN;
}
bGroupName.Fill <byte>(0);
Array.Copy(bs, 0, bGroupName, 0, group_len);
outputStream.Write(bGroupName, 0, bGroupName.Length);
}
ProtoCommon.RecvPackageInfo pkgInfo = ProtoCommon.recvPackage(outputStream,
ProtoCommon.TRACKER_PROTO_CMD_RESP,
ProtoCommon.TRACKER_QUERY_STORAGE_STORE_BODY_LEN);
this.errno = pkgInfo.errno;
if (pkgInfo.errno != 0)
{
return(null);
}
ip_addr = Encoding.ASCII.GetString(pkgInfo.body, ProtoCommon.FDFS_GROUP_NAME_MAX_LEN,
ProtoCommon.FDFS_IPADDR_SIZE - 1).Trim('\0');
port = (int)ProtoCommon.buff2long(pkgInfo.body, ProtoCommon.FDFS_GROUP_NAME_MAX_LEN
+ ProtoCommon.FDFS_IPADDR_SIZE - 1);
store_path = pkgInfo.body[ProtoCommon.TRACKER_QUERY_STORAGE_STORE_BODY_LEN - 1];
return(new StorageServer(ip_addr, port, store_path));
}
catch (IOException ex)
{
if (!bNewConnection)
{
try
{
trackerServer.close();
}
catch (IOException ex1)
{
}
}
throw ex;
}
finally
{
outputStream.Close();
if (bNewConnection)
{
try
{
trackerServer.close();
}
catch (IOException ex1)
{
}
}
}
}
/**
* query storage server stat info of the group
*
* @param trackerServer the tracker server
* @param groupName the group name of storage server
* @param storageIpAddr the storage server ip address, can be null or empty
* @return storage server stat array, return null if fail
*/
public StructStorageStat[] listStorages(TrackerServer trackerServer,
String groupName, String storageIpAddr)
{
byte[]
header;
byte[]
bGroupName;
byte[]
bs;
int len;
bool bNewConnection;
Socket trackerSocket;
if (trackerServer == null)
{
trackerServer = getConnection();
if (trackerServer == null)
{
return(null);
}
bNewConnection = true;
}
else
{
bNewConnection = false;
}
trackerSocket = trackerServer.getSocket();
var outputStream = new NetworkStream(trackerSocket);
try
{
bs = _encoding.GetBytes(groupName);
bGroupName = new byte[ProtoCommon.FDFS_GROUP_NAME_MAX_LEN];
if (bs.Length <= ProtoCommon.FDFS_GROUP_NAME_MAX_LEN)
{
len = bs.Length;
}
else
{
len = ProtoCommon.FDFS_GROUP_NAME_MAX_LEN;
}
bGroupName.Fill <byte>(0);
Array.Copy(bs, 0, bGroupName, 0, len);
int ipAddrLen;
byte[] bIpAddr;
if (storageIpAddr != null && storageIpAddr.Length > 0)
{
bIpAddr = _encoding.GetBytes(storageIpAddr);
if (bIpAddr.Length < ProtoCommon.FDFS_IPADDR_SIZE)
{
ipAddrLen = bIpAddr.Length;
}
else
{
ipAddrLen = ProtoCommon.FDFS_IPADDR_SIZE - 1;
}
}
else
{
bIpAddr = null;
ipAddrLen = 0;
}
header = ProtoCommon.packHeader(ProtoCommon.TRACKER_PROTO_CMD_SERVER_LIST_STORAGE,
ProtoCommon.FDFS_GROUP_NAME_MAX_LEN + ipAddrLen, (byte)0);
byte[] wholePkg = new byte[header.Length + bGroupName.Length + ipAddrLen];
Array.Copy(header, 0, wholePkg, 0, header.Length);
Array.Copy(bGroupName, 0, wholePkg, header.Length, bGroupName.Length);
if (ipAddrLen > 0)
{
Array.Copy(bIpAddr, 0, wholePkg, header.Length + bGroupName.Length, ipAddrLen);
}
outputStream.Write(wholePkg, 0, wholePkg.Length);
ProtoCommon.RecvPackageInfo pkgInfo = ProtoCommon.recvPackage(outputStream,
ProtoCommon.TRACKER_PROTO_CMD_RESP, -1);
this.errno = pkgInfo.errno;
if (pkgInfo.errno != 0)
{
return(null);
}
ProtoStructDecoder <StructStorageStat> decoder = new ProtoStructDecoder <StructStorageStat>();
return(decoder.decode <StructStorageStat>(pkgInfo.body, StructStorageStat.getFieldsTotalSize()));
}
catch (IOException ex)
{
if (!bNewConnection)
{
try
{
trackerServer.close();
}
catch (IOException ex1)
{
}
}
throw ex;
}
catch (Exception ex)
{
this.errno = ProtoCommon.ERR_NO_EINVAL;
return(null);
}
finally
{
outputStream.Close();
if (bNewConnection)
{
try
{
trackerServer.close();
}
catch (IOException ex1)
{
}
}
}
}
/**
* list groups
*
* @param trackerServer the tracker server
* @return group stat array, return null if fail
*/
public StructGroupStat[] listGroups(TrackerServer trackerServer)
{
byte[] header;
String ip_addr;
int port;
byte cmd;
int out_len;
bool bNewConnection;
byte store_path;
Socket trackerSocket;
if (trackerServer == null)
{
trackerServer = getConnection();
if (trackerServer == null)
{
return(null);
}
bNewConnection = true;
}
else
{
bNewConnection = false;
}
trackerSocket = trackerServer.getSocket();
var outputStream = new NetworkStream(trackerSocket);
try
{
header = ProtoCommon.packHeader(ProtoCommon.TRACKER_PROTO_CMD_SERVER_LIST_GROUP, 0, (byte)0);
outputStream.Write(header, 0, header.Length);
ProtoCommon.RecvPackageInfo pkgInfo = ProtoCommon.recvPackage(outputStream,
ProtoCommon.TRACKER_PROTO_CMD_RESP, -1);
this.errno = pkgInfo.errno;
if (pkgInfo.errno != 0)
{
return(null);
}
ProtoStructDecoder <StructGroupStat> decoder = new ProtoStructDecoder <StructGroupStat>();
return(decoder.decode <StructGroupStat>(pkgInfo.body, StructGroupStat.getFieldsTotalSize()));
}
catch (IOException ex)
{
if (!bNewConnection)
{
try
{
trackerServer.close();
}
catch (IOException ex1)
{
}
}
throw ex;
}
catch (Exception ex)
{
this.errno = ProtoCommon.ERR_NO_EINVAL;
return(null);
}
finally
{
outputStream.Close();
if (bNewConnection)
{
try
{
trackerServer.close();
}
catch (IOException ex1)
{
}
}
}
}
/**
* query storage server to download file
*
* @param trackerServer the tracker server
* @param cmd command code, ProtoCommon.TRACKER_PROTO_CMD_SERVICE_QUERY_FETCH_ONE or
* ProtoCommon.TRACKER_PROTO_CMD_SERVICE_QUERY_UPDATE
* @param groupName the group name of storage server
* @param filename filename on storage server
* @return storage server Socket object, return null if fail
*/
protected ServerInfo[] getStorages(TrackerServer trackerServer,
byte cmd, String groupName, String filename)
{
byte[] header;
byte[] bFileName;
byte[] bGroupName;
byte[] bs;
int len;
String ip_addr;
int port;
bool bNewConnection;
Socket trackerSocket;
if (trackerServer == null)
{
trackerServer = getConnection();
if (trackerServer == null)
{
return(null);
}
bNewConnection = true;
}
else
{
bNewConnection = false;
}
trackerSocket = trackerServer.getSocket();
var outputStream = new NetworkStream(trackerSocket);
try
{
bs = _encoding.GetBytes(groupName);
bGroupName = new byte[ProtoCommon.FDFS_GROUP_NAME_MAX_LEN];
bFileName = _encoding.GetBytes(filename);
if (bs.Length <= ProtoCommon.FDFS_GROUP_NAME_MAX_LEN)
{
len = bs.Length;
}
else
{
len = ProtoCommon.FDFS_GROUP_NAME_MAX_LEN;
}
bGroupName.Fill <byte>(0);
Array.Copy(bs, 0, bGroupName, 0, len);
header = ProtoCommon.packHeader(cmd, ProtoCommon.FDFS_GROUP_NAME_MAX_LEN + bFileName.Length, 0);
byte[] wholePkg = new byte[header.Length + bGroupName.Length + bFileName.Length];
Array.Copy(header, 0, wholePkg, 0, header.Length);
Array.Copy(bGroupName, 0, wholePkg, header.Length, bGroupName.Length);
Array.Copy(bFileName, 0, wholePkg, header.Length + bGroupName.Length, bFileName.Length);
outputStream.Write(wholePkg, 0, wholePkg.Length);
ProtoCommon.RecvPackageInfo pkgInfo = ProtoCommon.recvPackage(outputStream,
ProtoCommon.TRACKER_PROTO_CMD_RESP, -1);
this.errno = pkgInfo.errno;
if (pkgInfo.errno != 0)
{
return(null);
}
if (pkgInfo.body.Length < ProtoCommon.TRACKER_QUERY_STORAGE_FETCH_BODY_LEN)
{
throw new IOException("Invalid body Length: " + pkgInfo.body.Length);
}
if ((pkgInfo.body.Length - ProtoCommon.TRACKER_QUERY_STORAGE_FETCH_BODY_LEN) %
(ProtoCommon.FDFS_IPADDR_SIZE - 1) != 0)
{
throw new IOException("Invalid body Length: " + pkgInfo.body.Length);
}
int server_count = 1 + (pkgInfo.body.Length - ProtoCommon.TRACKER_QUERY_STORAGE_FETCH_BODY_LEN) /
(ProtoCommon.FDFS_IPADDR_SIZE - 1);
ip_addr = Encoding.ASCII.GetString(pkgInfo.body, ProtoCommon.FDFS_GROUP_NAME_MAX_LEN,
ProtoCommon.FDFS_IPADDR_SIZE - 1).Trim('\0');
int offset = ProtoCommon.FDFS_GROUP_NAME_MAX_LEN + ProtoCommon.FDFS_IPADDR_SIZE - 1;
port = (int)ProtoCommon.buff2long(pkgInfo.body, offset);
offset += ProtoCommon.FDFS_PROTO_PKG_LEN_SIZE;
ServerInfo[] servers = new ServerInfo[server_count];
servers[0] = new ServerInfo(ip_addr, port);
for (int i = 1; i < server_count; i++)
{
servers[i] = new ServerInfo(Encoding.ASCII.GetString(
pkgInfo.body, offset, ProtoCommon.FDFS_IPADDR_SIZE - 1).Trim('\0'),
port);
offset += ProtoCommon.FDFS_IPADDR_SIZE - 1;
}
return(servers);
}
catch (IOException ex)
{
if (!bNewConnection)
{
try
{
trackerServer.close();
}
catch (IOException ex1)
{
}
}
throw ex;
}
finally
{
outputStream.Close();
if (bNewConnection)
{
try
{
trackerServer.close();
}
catch (IOException ex1)
{
}
}
}
}
/**
* query storage servers to upload file
*
* @param trackerServer the tracker server
* @param groupName the group name to upload file to, can be empty
* @return storage servers, return null if fail
*/
public StorageServer[] getStoreStorages(TrackerServer trackerServer, String groupName)
{
byte[] header;
String ip_addr;
int port;
byte cmd;
int out_len;
bool bNewConnection;
Socket trackerSocket;
if (trackerServer == null)
{
trackerServer = getConnection();
if (trackerServer == null)
{
return(null);
}
bNewConnection = true;
}
else
{
bNewConnection = false;
}
trackerSocket = trackerServer.getSocket();
var outputStream = new NetworkStream(trackerSocket);
try
{
if (groupName == null || groupName.Length == 0)
{
cmd = ProtoCommon.TRACKER_PROTO_CMD_SERVICE_QUERY_STORE_WITHOUT_GROUP_ALL;
out_len = 0;
}
else
{
cmd = ProtoCommon.TRACKER_PROTO_CMD_SERVICE_QUERY_STORE_WITH_GROUP_ALL;
out_len = ProtoCommon.FDFS_GROUP_NAME_MAX_LEN;
}
header = ProtoCommon.packHeader(cmd, out_len, (byte)0);
outputStream.Write(header, 0, header.Length);
var encoder = Encoding.GetEncoding(ClientGlobal.g_charset);
if (groupName != null && groupName.Length > 0)
{
byte[] bGroupName;
byte[] bs;
int group_len;
bs = encoder.GetBytes(groupName);
bGroupName = new byte[ProtoCommon.FDFS_GROUP_NAME_MAX_LEN];
if (bs.Length <= ProtoCommon.FDFS_GROUP_NAME_MAX_LEN)
{
group_len = bs.Length;
}
else
{
group_len = ProtoCommon.FDFS_GROUP_NAME_MAX_LEN;
}
bGroupName.Fill <byte>(0);
Array.Copy(bs, 0, bGroupName, 0, group_len);
outputStream.Write(bGroupName, 0, bGroupName.Length);
}
ProtoCommon.RecvPackageInfo pkgInfo = ProtoCommon.recvPackage(outputStream,
ProtoCommon.TRACKER_PROTO_CMD_RESP, -1);
this.errno = pkgInfo.errno;
if (pkgInfo.errno != 0)
{
return(null);
}
if (pkgInfo.body.Length < ProtoCommon.TRACKER_QUERY_STORAGE_STORE_BODY_LEN)
{
this.errno = ProtoCommon.ERR_NO_EINVAL;
return(null);
}
int ipPortLen = pkgInfo.body.Length - (ProtoCommon.FDFS_GROUP_NAME_MAX_LEN + 1);
int recordLength = ProtoCommon.FDFS_IPADDR_SIZE - 1 + ProtoCommon.FDFS_PROTO_PKG_LEN_SIZE;
if (ipPortLen % recordLength != 0)
{
this.errno = ProtoCommon.ERR_NO_EINVAL;
return(null);
}
int serverCount = ipPortLen / recordLength;
if (serverCount > 16)
{
this.errno = ProtoCommon.ERR_NO_ENOSPC;
return(null);
}
StorageServer[] results = new StorageServer[serverCount];
byte store_path = pkgInfo.body[pkgInfo.body.Length - 1];
int offset = ProtoCommon.FDFS_GROUP_NAME_MAX_LEN;
for (int i = 0; i < serverCount; i++)
{
ip_addr = Encoding.ASCII.GetString(pkgInfo.body, offset, ProtoCommon.FDFS_IPADDR_SIZE - 1).Trim(
'\0');
offset += ProtoCommon.FDFS_IPADDR_SIZE - 1;
port = (int)ProtoCommon.buff2long(pkgInfo.body, offset);
offset += ProtoCommon.FDFS_PROTO_PKG_LEN_SIZE;
results[i] = new StorageServer(ip_addr, port, store_path);
}
return(results);
}
catch (IOException ex)
{
if (!bNewConnection)
{
try
{
trackerServer.close();
}
catch (IOException ex1)
{
}
}
throw ex;
}
finally
{
outputStream.Close();
if (bNewConnection)
{
try
{
trackerServer.close();
}
catch (IOException ex1)
{
}
}
}
}
