Small issue with system()

**Metal Man** · 10-20-2003

I have the following code

Code:

#include <stdio.h>
#include <stdlib.h>
#include <iostream.h>

int main()
{
system("telnet site.com 80");
system("GET /whatever.html HTTP/1.1");
return 0;
}

It connects but I cant get it to execute the...

Code:

system("GET /whatever.html  HTTP/1.1");

part of the code until I end my telnet session.

So heres the questions, how do I make it connect and then send the GET request while it's still connected???

I looked around the forums and google and i couldnt find anything that really anwsered my question, this thing has been driving me crazy for days.

**velius** · 10-21-2003

The GET command is a part of FTP and Telnet. It is not a valid command on the command line.

**Metal Man** · 10-21-2003

I tried to put it in the same line

Code:

system("telnet site.com 80 GET /whatever.html HTTP/1.1");

but that doesnt work either.

**velius** · 10-21-2003

What I'm telling you is you cannot do that PERIOD. You cannot start telnet and then send in commands like that at all. Also I looked into it and I was wrong, Telnet does not have a GET command.

**ZerOrDie** · 10-21-2003

well you could try to open a pipe to telnet... or just learn some basic winsock...

Telnet does not have a GET command.

maybe not but when you are connected to a http server on port 80 and type that in something will happen!

**velius** · 10-21-2003

maybe not but when you are connected to a http server on port 80 and type that in something will happen!

The port is being opened with Telnet not an HTTP compliant program. Telnet is not the way to get files from a server for that purpose. Metal Man may wish to consider writing a mini web server that can do what it is he is looking to do instead.

**Metal Man** · 10-21-2003

i dont really care about the program displaying the html, i just want to send the GET command. I'm just trying to find a way to open the telnet session and then write to it.

**velius** · 10-21-2003

With out a message loop like event driven programs have that might be difficult to do.

**Salem** · 10-21-2003

Seems to me that you need wget - or some other non-interactive browser like curl

$ wget --help
GNU Wget 1.8.2, a non-interactive network retriever.
Usage: wget [OPTION]... [URL]...

So
system( "wget http://www.site.com/whatever.htm" );

Or as ZerOrDie has hinted, use popen(), but that relies on knowing how to drive telnet PROPERLY, that is, use a telnet command which isn't GET

Code:

FILE *fp = popen( "telnet site.com 80" );
fprintf( "get file\n" );  // needs some research
pclose( fp );

Small issue with system()

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