non-blocking recv() problem when webserver disconnects

I'm having trouble a non-blocking revc(). If I'm correct shall recv()
return the amount of bytes revived at particular moment, and return 0
when EOF and –1 when error.

My program connects to a web server and sends the "GET / HTTP1.1…."
the the socket starts to receive data from the web server. But recv()
NEVER returns 0 or –1. So the connection is never ended witch hangs
the program there until the socket timeouts.

Any ideas what can be wrong?

Here's some code:
FD_ZERO(&real_mask);
FD_SET(wget_s.getSock(), &real_mask);

tv.tv_sec = (long) 50000;
tv.tv_usec = (long) 0;

wget_s.set_non_blocking(true);

struct pollfd poll_list[1];
int t, q;

try
{

poll_list[0].fd = wget_s.getSock();
poll_list[0].events = POLLIN;
t=0;
q=1;
while(t != 1)
{
cout << poll(poll_list,(unsigned long)1,-1) << endl;

if(((poll_list[0].revents&POLLHUP) == POLLHUP) ||
((poll_list[0].revents&POLLERR) == POLLERR) ||
((poll_list[0].revents&POLLNVAL) == POLLNVAL))
{
cout << "Mysko" << endl;
return 0;
}

if((poll_list[0].revents&POLLIN) == POLLIN)
{
wget_s.set_non_blocking(false);

cout << wget_s.recv(wget_data) << " RECV" << endl;

cout << wget_s.send(" ") << " SEND" << endl;

cout <<wget_data.find("0",0) << endl;
cout << wget_data << endl;
}
}

}
catch (SocketException &e)
{
cout << "Exception" << endl;
}

Erik Larsson <(E-Mail Removed)> wrote:
> I'm having trouble a non-blocking revc(). If I'm correct shall recv()
> return the amount of bytes revived at particular moment, and return 0
> when EOF and ?1 when error.
>
> My program connects to a web server and sends the "GET / HTTP1.1?."
> the the socket starts to receive data from the web server. But recv()
> NEVER returns 0 or ?1. So the connection is never ended witch hangs
> the program there until the socket timeouts.

It sounds like its not being set non-blocking. Run it through strace to
see what the system calls are doing.

But what's the point? You're polling as well as non-blocking? You only
really need one method or the other.

--
Cameron Kerr
(E-Mail Removed) : http://nzgeeks.org/cameron/
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