How to connect to a ftp server

This is a discussion on How to connect to a ftp server within the Networking/Device Communication forums, part of the General Programming Boards category; Hi, What I am trying to do is to connect to my ftp server where I will read and write ...

  1. #1
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    How to connect to a ftp server

    Hi,

    What I am trying to do is to connect to my ftp server where I will read and write to a file that is located like this:

    "Path\\This.txt";

    I have googled around for 2 days but I cant find a good example code on how to:

    * Connect to ftp.server
    * Call a Path on the server, to Read/Write

    I dont exactly know all steps but if I could find any good examples of this, it really would help me starting out this.

    The only code that I have found is something like this but I beleive this is for TCP wich is not the right thing:



    Code:
    using namespace System.Net.Sockets;
    
    TcpClient TcpCo = new TcpClient();
    TcpCo.Connect( "ftp.urladdress.com", 25 );

  2. #2
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    First of all, FTP is port 20/21, not 25. 25 is SMTP.

  3. #3
    Captain Crash brewbuck's Avatar
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    I googled for two seconds...

    FtpWebRequest Class (System.Net)
    Code:
    //try
    //{
    	if (a) do { f( b); } while(1);
    	else   do { f(!b); } while(1);
    //}

  4. #4
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    Thank you, I will use port 20/21 and also look into: FtpWebRequest Class (System.Net) and see what I can start out with.
    Last edited by Coding; 05-07-2009 at 03:17 PM.

  5. #5
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    I have succeded to connect to the ftp server and also the file that I want to read like this. That was really nice

    I also succeded to read the lines from the file. Then I am trying to write lines to the file but here I get an errormessage:

    Code:
    The stream is not writable
    However I have red something about EnableSsl = true

    "Unless the EnableSsl property is true, all data and commands, including your user name and password information, are sent to the server in clear text. Anyone monitoring network traffic can view your credentials and use them to connect to the server."

    The thing is that it will be users connecting to the ftp.server and what I am afraid for is that any "hackers" might see what "User" and "Password" there is. I dont really know so much about any securitys for this.


    Code:
    //First a request to FTP Server shall be initiated, requesting the file needed. 
     String^ FilePath = "ftp://myWebsite.info:21/MyFolder/MyFile.txt";
    
     FtpWebRequest^ objRequest = (FtpWebRequest^)WebRequest::Create(FilePath);
     objRequest->Credentials = gcnew NetworkCredential("User", "Password");			 
    
    
    
    //Then, we have to get the response for this request:
    FtpWebResponse ^objResponse = (FtpWebResponse^) objRequest->GetResponse();
    			 
    
    			 //Get the stream 
    			 Stream^ responseStream = objResponse->GetResponseStream();
    
    
    			 //read the file;
    			 List<String^> Lines = gcnew List<String^>();
    			 StreamReader^ reader = gcnew StreamReader(responseStream);
    
    			 while( reader->Peek() >= 0 )
    			 {
               			              Lines.Add(reader->ReadLine()); //Save all Lines;
            		 }
    			 //Lets close Everything
    			 reader->Close();
    
    
    
    
    
    			 //Write something to file for test 
    			 StreamWriter^ writer = gcnew StreamWriter(responseStream);
    
    			 for( int i = 0; i < 5; i++ ) 
    			 {
    				 writer->WriteLine("SomeLines");            //This gives an errormessage telling that the stream is not writable
    			 }
    			 writer->Close();
    			 responseStream->Close(); //close the stream after reading;
    			 objResponse->Close(); //Closes the connection to the server;
    Last edited by Coding; 05-07-2009 at 03:18 PM.

  6. #6
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    :/

    Quote Originally Posted by Coding View Post
    I have succeded to connect to the ftp server and also the file that I want to read like this. That was really nice

    I also succeded to read the lines from the file. Then I am trying to write lines to the file but here I get an errormessage:

    Code:
    The stream is not writable
    However I have red something about EnableSsl = true

    "Unless the EnableSsl property is true, all data and commands, including your user name and password information, are sent to the server in clear text. Anyone monitoring network traffic can view your credentials and use them to connect to the server."

    The thing is that it will be users connecting to the ftp.server and what I am afraid for is that any "hackers" might see what "User" and "Password" there is. I dont really know so much about any securitys for this.


    Code:
    //First a request to FTP Server shall be initiated, requesting the file needed. 
     String^ FilePath = "ftp://myWebsite.info:21/MyFolder/MyFile.txt";
    
     FtpWebRequest^ objRequest = (FtpWebRequest^)WebRequest::Create(FilePath);
     objRequest->Credentials = gcnew NetworkCredential("User", "Password");			 
    
    
    
    //Then, we have to get the response for this request:
    FtpWebResponse ^objResponse = (FtpWebResponse^) objRequest->GetResponse();
    			 
    
    			 //Get the stream 
    			 Stream^ responseStream = objResponse->GetResponseStream();
    
    
    			 //read the file;
    			 List<String^> Lines = gcnew List<String^>();
    			 StreamReader^ reader = gcnew StreamReader(responseStream);
    
    			 while( reader->Peek() >= 0 )
    			 {
               			              Lines.Add(reader->ReadLine()); //Save all Lines;
            		 }
    			 //Lets close Everything
    			 reader->Close();
    
    
    
    
    
    			 //Write something to file for test 
    			 StreamWriter^ writer = gcnew StreamWriter(responseStream);
    
    			 for( int i = 0; i < 5; i++ ) 
    			 {
    				 writer->WriteLine("SomeLines");            //This gives an errormessage telling that the stream is not writable
    			 }
    			 writer->Close();
    			 responseStream->Close(); //close the stream after reading;
    			 objResponse->Close(); //Closes the connection to the server;
    I am having the same troubles as you, but when I try to implement that code it just gives me a load of undeclared identifier errors, can you think of any reasons why or how to fix them? I should note that this is the first BIG thing I've done in C++.

  7. #7
    Registered User C_ntua's Avatar
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    Are you sure you have write-access to the server? You may be able to read but not write.

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