download a remote file to the local machine.

[sde]

can someone point me in the right direction? i want to write a bench program to tell me how long it takes to download a file across a network.

i figure i can use the date object to determine the time, but i need to know what to use to download the file to the local computer.

if i find an answer, i'll post.

[Belisarius]

Sorry, I can't think of something right now that would work apart from attempting to ping the host computer, and that doesn't sound feesible and especially so for a bandwidth test.

[sde]

last night i was messing with the URL object, but yeah, not working for a bandwidth test.

i'm thinking that i just need to execute a system command to copy a file from a network drive.

i got this working with c# last night, but i want to use it on a mac too. we're setting up a gigabit network within our network for the transfer of large video files. i'll update if i work anything out today.

thanks for the reply

[Belisarius]

I assumed that this was for a website; I have done network benchmarking in Java before. It's just a matter of opening a socket and shoving through a known quantity of data.

[freesoft_2000]

hi everyone,

I don't know much about about other types of downloads except for ftp downloads. By the way you can use the below function as a way to get file sizes

import java.net.*;
import java.lang.reflect.*;
import sun.net.ftp.*;
import sun.net.*;

int getfilesize(FtpClient client, String filename){

//This function tries to get the file size of the currently
//uploaded or downloaded file

String str = "", token;
int c, index = 0;
char ch;
 
try
{
//The try statement is to try to catch any errors thrown by 
//the Java input and output

                   TelnetInputStream lst = client.list();
                    filename = filename.toLowerCase();

while(true)
{
            c = lst.read();
             ch = (char) c;
if((c < 0) || (ch == '\n'))
{
          str = str.toLowerCase();

if(str.indexOf(filename) >= 0)
{

              StringTokenizer tk = new StringTokenizer(str);

while(tk.hasMoreTokens())
{
                token = tk.nextToken();

if(index == 4)
{
//The try statement is to try to catch any errors thrown by 
//the Java input and output

try
{
            return Integer.parseInt(token);
}
//The catch statement is to try to catch any errors 
//thrown by the Java input and output
//by using the NumberFormatException constant

catch(NumberFormatException e)
{
        return -1;
}

}

          index++;

}

        str = "";

}

if(c <= 0)
{ 
        break;
}

       str += ch;
}

       return -1;

}

}
//The catch statement is to try to catch any errors
//thrown by the Java input and output
//by using the Exception constant

catch(Exception e1)
{
System.out.println("File size unknown");
}

       return -1;
}

I tried the function and it works and i hope it helps you. The function returns the current downloaded size of the file.

Please let me know what think of this function

Yours Sincerely

Richard West