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Pradeep Gupta
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Posted: .NET Framework Networking and Communication, ftp sockets in c# |
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hello sir,
iam using ftp server(c#), thru my client ftp program is connected to remote server ftp.
but iam unable to access like listing files in the remote host, uploading and directory creation and removing . Is that do we need any permissions for doing above operations.
.NET Development1
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RizwanSharp
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Posted: .NET Framework Networking and Communication, ftp sockets in c# |
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What class of .Net are you using FtpClient Are you getting any errror And wheres your code
You asked 1 question I asked 3 from you just to understand your problem.
Best Regards,
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Pradeep Gupta
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Posted: .NET Framework Networking and Communication, ftp sockets in c# |
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no iam not getting any error. i was written ftp client program in c# console application.
it is not listing the file in the remote host
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ahmedilyas
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Posted: .NET Framework Networking and Communication, ftp sockets in c# |
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Pradeep Gupta
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Posted: .NET Framework Networking and Communication, ftp sockets in c# |
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my client ftp program is connected to remote server. if iam sending the ftp command like "mkdir" . it is not creating the directorty. it is showing acces denied when iam executing the above command . pls resolve this.
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ahmedilyas
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Posted: .NET Framework Networking and Communication, ftp sockets in c# |
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well sounds like a permissions issue. you have to give it the credentials to use when connecting/performing the action you want. What .NET Framework version are you using Can you also show us the code you are using
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Pradeep Gupta
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Posted: .NET Framework Networking and Communication, ftp sockets in c# |
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my ftp client program is connected to remote server thats sure. but iam unable access the ftp commands mentioned below. means it showing like acces denied.
iam using .net ver 1.1 i was written the in console application. any need to give permissions for the oprations like mkdir , upload, download to operate in the remote machine
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ahmedilyas
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Posted: .NET Framework Networking and Communication, ftp sockets in c# |
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you do need to give permissions i believe when doing some operation, but also make sure that the account does have permissions to perform such actions.
Can you post the code you are using
you may also wish to look at this on how to supply credentials:
http://msdn2.microsoft.com/en-us/library/456dfw4f.aspx
would be cool if you can post the code however
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RizwanSharp
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Posted: .NET Framework Networking and Communication, ftp sockets in c# |
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Hmmmmm, Try to connect and do the same operations with same User and see do you get errors or its just your programming which is showing these errors.
If you are successfull in manual work from Command Prompt then please see this post I have mentioned some Ftp Client library which worked fine for me when i needed to use it about 2 years ago.
http://forums.microsoft.com/MSDN/ShowPost.aspx PostID=815668&SiteID=1
Best Regards and Best of Luck!
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Pradeep Gupta
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Posted: .NET Framework Networking and Communication, ftp sockets in c# |
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This is my client ftp program sir, which is downloaded from the net. with this program iam unable to create / listing directories at the remote machine and also iam unable to upload/downloads files to/from the remote machine.Pls resolve this . My .NEt version is 1.1 and ny system type Windows Nt.
using System; using System.Net; using System.IO; using System.Text; using System.Net.Sockets;
namespace FtpLib {
public class FTPFactory {
private string remoteHost,remotePath,remoteUser,remotePass,mes; private int remotePort,bytes; private Socket clientSocket;
private int retValue; private Boolean debug; private Boolean logined; private string reply;
private static int BLOCK_SIZE = 512;
Byte[] buffer = new Byte[BLOCK_SIZE]; Encoding ASCII = Encoding.ASCII;
public FTPFactory() {
remoteHost = "localhost"; remotePath = "."; remoteUser = "anonymous";
remotePort = 21; debug = false; logined = false;
}
/// /// Set the name of the FTP server to connect to. /// /// Server name public void setRemoteHost(string remoteHost) { this.remoteHost = remoteHost; }
/// /// Return the name of the current FTP server. /// /// Server name public string getRemoteHost() { return remoteHost; }
/// /// Set the port number to use for FTP. /// /// Port number public void setRemotePort(int remotePort) { this.remotePort = remotePort; }
/// /// Return the current port number. /// /// Current port number public int getRemotePort() { return remotePort; }
/// /// Set the remote directory path. /// /// The remote directory path public void setRemotePath(string remotePath) { this.remotePath = remotePath; }
/// /// Return the current remote directory path. /// /// The current remote directory path. public string getRemotePath() { return remotePath; }
/// /// Set the user name to use for logging into the remote server. /// /// Username public void setRemoteUser(string remoteUser) { this.remoteUser = remoteUser; }
/// /// Set the password to user for logging into the remote server. /// /// Password public void setRemotePass(string remotePass) { this.remotePass = remotePass; }
/// /// Return a string array containing the remote directory's file list. /// /// /// public string[] getFileList(string mask) {
if(!logined) { login(); }
Socket cSocket = createDataSocket();
sendCommand("NLST " + mask);
if(!(retValue == 150 || retValue == 125)) { throw new IOException(reply.Substring(4)); }
mes = "";
while(true) {
int bytes = cSocket.Receive(buffer, buffer.Length, 0); mes += ASCII.GetString(buffer, 0, bytes);
if(bytes < buffer.Length) { break; } }
char[] seperator = {'\n'}; string[] mess = mes.Split(seperator);
cSocket.Close();
readReply();
if(retValue != 226) { throw new IOException(reply.Substring(4)); } return mess;
}
/// /// Return the size of a file. /// /// /// public long getFileSize(string fileName) {
if(!logined) { login(); }
sendCommand("SIZE " + fileName); long size=0;
if(retValue == 213) { size = Int64.Parse(reply.Substring(4)); } else { throw new IOException(reply.Substring(4)); }
return size;
}
/// /// Login to the remote server. /// public void login() {
clientSocket = new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp); IPEndPoint ep = new IPEndPoint(Dns.Resolve(remoteHost).AddressList[0], remotePort);
try { clientSocket.Connect(ep); } catch(Exception) { throw new IOException("Couldn't connect to remote server"); }
readReply(); if(retValue != 220) { close(); throw new IOException(reply.Substring(4)); } if(debug) Console.WriteLine("USER "+remoteUser);
sendCommand("USER "+remoteUser);
if( !(retValue == 331 || retValue == 230) ) { cleanup(); throw new IOException(reply.Substring(4)); }
if( retValue != 230 ) { if(debug) Console.WriteLine("PASS xxx");
sendCommand("PASS "+remotePass); if( !(retValue == 230 || retValue == 202) ) { cleanup(); throw new IOException(reply.Substring(4)); } }
logined = true; Console.WriteLine("Connected to "+remoteHost);
chdir(remotePath);
}
/// /// If the value of mode is true, set binary mode for downloads. /// Else, set Ascii mode. /// /// public void setBinaryMode(Boolean mode) {
if(mode) { sendCommand("TYPE I"); } else { sendCommand("TYPE A"); } if (retValue != 200) { throw new IOException(reply.Substring(4)); } }
/// /// Download a file to the Assembly's local directory, /// keeping the same file name. /// /// public void download(string remFileName) { download(remFileName,"",false); }
/// /// Download a remote file to the Assembly's local directory, /// keeping the same file name, and set the resume flag. /// /// /// public void download(string remFileName,Boolean resume) { download(remFileName,"",resume); }
/// /// Download a remote file to a local file name which can include /// a path. The local file name will be created or overwritten, /// but the path must exist. /// /// /// public void download(string remFileName,string locFileName) { download(remFileName,locFileName,false); }
/// /// Download a remote file to a local file name which can include /// a path, and set the resume flag. The local file name will be /// created or overwritten, but the path must exist. /// /// /// /// public void download(string remFileName,string locFileName,Boolean resume) { if(!logined) { login(); }
setBinaryMode(true);
Console.WriteLine("Downloading file "+remFileName+" from "+remoteHost + "/"+remotePath);
if (locFileName.Equals("")) { locFileName = remFileName; }
if(!File.Exists(locFileName)) { Stream st = File.Create(locFileName); st.Close(); }
FileStream output = new FileStream(locFileName,FileMode.Open);
Socket cSocket = createDataSocket();
long offset = 0;
if(resume) {
offset = output.Length;
if(offset > 0 ) { sendCommand("REST "+offset); if(retValue != 350) { //throw new IOException(reply.Substring(4)); //Some servers may not support resuming. offset = 0; } }
if(offset > 0) { if(debug) { Console.WriteLine("seeking to " + offset); } long npos = output.Seek(offset,SeekOrigin.Begin); Console.WriteLine("new pos="+npos); } }
sendCommand("RETR " + remFileName);
if(!(retValue == 150 || retValue == 125)) { throw new IOException(reply.Substring(4)); }
while(true) {
bytes = cSocket.Receive(buffer, buffer.Length, 0); output.Write(buffer,0,bytes);
if(bytes <= 0) { break; } }
output.Close(); if (cSocket.Connected) { cSocket.Close(); }
Console.WriteLine("");
readReply();
if( !(retValue == 226 || retValue == 250) ) { throw new IOException(reply.Substring(4)); }
}
/// /// Upload a file. /// /// public void upload(string fileName) { upload(fileName,false); }
/// /// Upload a file and set the resume flag. /// /// /// public void upload(string fileName,Boolean resume) {
if(!logined) { login(); }
Socket cSocket = createDataSocket(); long offset=0;
if(resume) {
try {
setBinaryMode(true); offset = getFileSize(fileName);
} catch(Exception) { offset = 0; } }
if(offset > 0 ) { sendCommand("REST " + offset); if(retValue != 350) { //throw new IOException(reply.Substring(4)); //Remote server may not support resuming. offset = 0; } }
sendCommand("STOR "+Path.GetFileName(fileName));
if( !(retValue == 125 || retValue == 150) ) { throw new IOException(reply.Substring(4)); }
// open input stream to read source file FileStream input = new FileStream(fileName,FileMode.Open);
if(offset != 0) {
if(debug) { Console.WriteLine("seeking to " + offset); } input.Seek(offset,SeekOrigin.Begin); }
Console.WriteLine("Uploading file "+fileName+" to "+remotePath);
while ((bytes = input.Read(buffer,0,buffer.Length)) > 0) {
cSocket.Send(buffer, bytes, 0);
} input.Close();
Console.WriteLine("");
if (cSocket.Connected) { cSocket.Close(); }
readReply(); if( !(retValue == 226 || retValue == 250) ) { throw new IOException(reply.Substring(4)); } }
/// /// Delete a file from the remote FTP server. /// /// public void deleteRemoteFile(string fileName) {
if(!logined) { login(); }
sendCommand("DELE "+fileName);
if(retValue != 250) { throw new IOException(reply.Substring(4)); }
}
/// /// Rename a file on the remote FTP server. /// /// /// public void renameRemoteFile(string oldFileName,string newFileName) {
if(!logined) { login(); }
sendCommand("RNFR "+oldFileName);
if(retValue != 350) { throw new IOException(reply.Substring(4)); }
// known problem // rnto will not take care of existing file. // i.e. It will overwrite if newFileName exist sendCommand("RNTO "+newFileName); if(retValue != 250) { throw new IOException(reply.Substring(4)); }
}
/// /// Create a directory on the remote FTP server. /// /// public void mkdir(string dirName) {
if(!logined) { login(); }
sendCommand("MKD "+dirName);
if(retValue != 250) { throw new IOException(reply.Substring(4)); }
}
/// /// Delete a directory on the remote FTP server. /// /// public void rmdir(string dirName) {
if(!logined) { login(); }
sendCommand("RMD "+dirName);
if(retValue != 250) { throw new IOException(reply.Substring(4)); }
}
/// /// Change the current working directory on the remote FTP server. /// /// public void chdir(string dirName) {
if(dirName.Equals(".")) { return; }
if(!logined) { login(); }
sendCommand("CWD "+dirName);
if(retValue != 250) { throw new IOException(reply.Substring(4)); }
this.remotePath = dirName;
Console.WriteLine("Current directory is "+remotePath);
}
/// /// Close the FTP connection. /// public void close() {
if( clientSocket != null ) { sendCommand("QUIT"); }
cleanup(); Console.WriteLine("Closing..."); }
/// /// Set debug mode. /// /// public void setDebug(Boolean debug) { this.debug = debug; }
private void readReply() { mes = ""; reply = readLine(); retValue = Int32.Parse(reply.Substring(0,3)); }
private void cleanup() { if(clientSocket!=null) { clientSocket.Close(); clientSocket = null; } logined = false; }
private string readLine() {
while(true) { bytes = clientSocket.Receive(buffer, buffer.Length, 0); mes += ASCII.GetString(buffer, 0, bytes); if(bytes < buffer.Length) { break; } }
char[] seperator = {'\n'}; string[] mess = mes.Split(seperator);
if(mes.Length > 2) { mes = mess[mess.Length-2]; } else { mes = mess[0]; }
if(!mes.Substring(3,1).Equals(" ")) { return readLine(); }
if(debug) { for(int k=0;k < mess.Length-1;k++) { Console.WriteLine(mess[k]); } } return mes; }
private void sendCommand(String command) {
Byte[] cmdBytes = Encoding.ASCII.GetBytes((command+"\r\n").ToCharArray()); clientSocket.Send(cmdBytes, cmdBytes.Length, 0); readReply(); }
private Socket createDataSocket() {
sendCommand("PASV");
if(retValue != 227) { throw new IOException(reply.Substring(4)); }
int index1 = reply.IndexOf('('); int index2 = reply.IndexOf(')'); string ipData = reply.Substring(index1+1,index2-index1-1); int[] parts = new int;
int len = ipData.Length; int partCount = 0; string buf="";
for (int i = 0; i < len && partCount <= 6; i++) {
char ch = Char.Parse(ipData.Substring(i,1)); if (Char.IsDigit(ch)) buf+=ch; else if (ch != ',') { throw new IOException("Malformed PASV reply: " + reply); }
if (ch == ',' || i+1 == len) {
try { parts[partCount++] = Int32.Parse(buf); buf=""; } catch (Exception) { throw new IOException("Malformed PASV reply: " + reply); } } }
string ipAddress = parts[0] + "."+ parts[1]+ "." + parts[2] + "." + parts[3];
int port = (parts[4] << 8) + parts[5];
Socket s = new Socket(AddressFamily.InterNetwork,SocketType.Stream,ProtocolType.Tcp); IPEndPoint ep = new IPEndPoint(Dns.Resolve(ipAddress).AddressList[0], port);
try { s.Connect(ep); } catch(Exception) { throw new IOException("Can't connect to remote server"); }
return s; }
} }
Following is the listing of a test program which uses this library
/*
File : Test.cs Better view with tab space=4 use the following line to compile csc.exe /t:exe /r:System.DLL /r:FTPLib.dll /out:"Test.exe" "Test.cs"
*/ using System; using FtpLib;
public class Test {
public static void Main() {
try {
Console.WriteLine("Starting...");
FTPFactory ff = new FTPFactory(); ff.setDebug(true); ff.setRemoteHost("192.168.0.30"); ff.setRemoteUser("jaimon"); ff.setRemotePass("mathew"); ff.login(); ff.chdir("incoming");
string[] fileNames = ff.getFileList("*.*"); for(int i=0;i < fileNames.Length;i++) { Console.WriteLine(fileNames); }
ff.setBinaryMode(true); ff.upload("c:\jaimon\tmp\Webdunia.ttf"); ff.close();
}catch(Exception e) { Console.WriteLine("Caught Error :"+e.Message); } } }
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Pradeep Gupta
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Posted: .NET Framework Networking and Communication, ftp sockets in c# |
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iam not getting any errors , but, it is unable to list the files at the remote machine . And also it is not downloading the files from the remote machine
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Pradeep Gupta
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Posted: .NET Framework Networking and Communication, ftp sockets in c# |
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while iam downloading a list of files from the remote machine . it shows "one error " The system can't find the specified file.
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Pradeep Gupta
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Posted: .NET Framework Networking and Communication, ftp sockets in c# |
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while i was send a download command to the remote machine , it is showing like this
125 Data connection already open ; Transfer starting
226 Transfer complete.
like this it is showing , but it is not listing the files .
list of
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