Connected server through socket but not able to retrieve files.

[nirajjha]

hi,
i am able to connect to server through socket, (using only client side code )
but not able to retrieve files , i dont able to find files but its there in the server.

i am getting responce from server that i am connected to that server .
but still ......

i have used receive method for retrieving files.


can any body help..

[pbmods]

Heya, nirajjha. Welcome to TSDN!

What protocol are you using?

[nirajjha]

Heya, nirajjha. Welcome to TSDN!

What protocol are you using?

I am using FTP.......

[pbmods]

How are you connecting to the server?

Are you using an FTP program? Which program, and what operating system are you using?

Are you writing a program? Which programming language are you using?

[nirajjha]

How are you connecting to the server?

Are you using an FTP program? Which program, and what operating system are you using?

Are you writing a program? Which programming language are you using?

Hi ,
thanks yaar for repling

I am using socket for connection
IPAddress[] Ips = Dns.GetHostAddr esses("")
Socket s = new Socket(AddressF amily.InterNetw ork, SocketType.Stre am, ProtocolType.IP );
s.connect(ipadd ress,port);

and using " poll " method to verify whether it is connected or not.
it is showing me connected.

and i defined 2 method.
first to send request : By sendrequest() method
second to retrieve responce fron server :-.By GetResponce() method ;


there only i am sending username and
password like ...
string response;
SendRequest(s, "LOGIN" + " " + "username " + " password" );
sending login command or by
below code .
SendRequest(s, "USER" + " " + "username") ;
response = GetResponce(s);
SendRequest(s, "PWD" + " " + "password") ;
response = GetResponce(s);

i am slightly confused, can u briefly explain me what is the difference between
socket and ftp ........confuse d.....

and what is the real problem in my code, i am missing some thing.

i am using window 2000 server....

[pbmods]

Heya, nirajjha.

I'll go ahead and move your thread to the .NET Forum, where one of our resident .NET experts will be able to help you out.

[Plater]

FTP uses one port for talking and another for data transfer.
You either have to handle doing Passive FTP (everything on one port) or check the FTP specifications for how to handle the 2nd socket-port setup.

The differences between FTP and sockets are huge. FTP is a protocol, a socket is an implementation of Berkley Sockets used for communicating with other computers. I recomend a quick Wiki check of the subjects if you are interested.

[nirajjha]

add

FTP uses one port for talking and another for data transfer.
You either have to handle doing Passive FTP (everything on one port) or check the FTP specifications for how to handle the 2nd socket-port setup.

The differences between FTP and sockets are huge. FTP is a protocol, a socket is an implementation of Berkley Sockets used for communicating with other computers. I recomend a quick Wiki check of the subjects if you are interested.

Thank dude for replying .

i am able to retrieve files by using ftpwebrequest class.i have done that today.

but as specified in this thread, i am using socket for connection...ye s i have succeeded in establishing connection with server.but i am not able to find any file..there .
tell me one thing, i have communicating a server through its ipaddress and port number ..but how to send Username and password...to that server using socket that i have already established(con nection).


yes i have used passive connetion .

is there any command used in sockets for sending username and password.....


any help i appreciate it.

[Plater]

There are commands to send/receive data as bytes.
You will have to convert your strings to bytes before sending.
I recomend using: Encoding.ASCII. GetBytes()

[nirajjha]

There are commands to send/receive data as bytes.
You will have to convert your strings to bytes before sending.
I recomend using: Encoding.ASCII. GetBytes()

hi,

i want to know what is maximum speed that can be achieved by using sockets.i have achieved 20Mega bytes in 4 min 30 seconds.
or

Any other protocol is there where u can achieve more than sockets.

plz i want to know it.....

[Plater]

"Sockets" is not a protocol. For the most part, speed is based on the physical connection between the endpoints. Talking through a broadband connection to a computer hundreds of miles away will probably be faster then talking to a computer down the street if you both have 28.8kbaud modems.

I really suggest reading through wiki articles about these kinds of things so you have a better understanding of their concepts

[nirajjha]

"Sockets" is not a protocol. For the most part, speed is based on the physical connection between the endpoints. Talking through a broadband connection to a computer hundreds of miles away will probably be faster then talking to a computer down the street if you both have 28.8kbaud modems.

I really suggest reading through wiki articles about these kinds of things so you have a better understanding of their concepts

Thanks a Lot for your guidance.

my program is working fine now......both using socket and ftp.
as a fresher this is nice achievement for me.

Ur last post was really helpful .......Thanks.

one more question in my mind, suppose if i am using threads(differe nt threads for different files to be downloaded at same time.) for downloading .will it affect download speed.

[Plater]

Yes, just like in everyday use, you have a finite amount of bandwidth. When it's used up, it's used up. If you're downloading one file from the internet, trying to download a bunch more will slow the first one down.

Only so much data can flow through at any givin time (throughput)