[RESOLVED] Socket Problems

[juschillin]

This question is two-fold, but if someone could help me with the first question, it would probably solve my problem.

$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP) or die("Could not create socket\n");
$sk = socket_connect($socket, "192.168.3.136", "3689");

$packet = "GET /login?87893974 HTTP/1.1\r\n";
$packet .= "Connection: close\r\n\r\n";


socket_write($socket, $packet, strlen($packet));

do{
	$buf = "";
	$buf = socket_read($socket, 4096);
	$data .= $buf;
	echo "hello";
}while($buf != "");

echo "$data\r\n\r\n";

That code works fine. However, if I change

Connection: close

to

Connection: keep-alive

I cannot read anything back from the socket. I have opened wireshark, to verify that the server is responding to my computer, and it is. PHP is just not reading the response back.

Again, if I have

Connection: close

then all is fine.

The reason

Connection: keep-alive

is important to me is that I need to send this request, read the value that it sends back and post that value back to the server for verification....all on the same "session". With

Connection: close

, I can't seem to write a second time to the same socket.

Which brings me to my second question:

Does specifying Connection: close, tell the server to close the connection? Is that why I can't send data to it on the same socket a second time?

[juschillin]

Alright, I changed to pfsockopen

$fp = pfsockopen("192.168.3.136", "3689");
$content = "GET /login?pairing-guid=0x0000000000000001 HTTP/1.1\r\n";
$content .= "Content-Length: 0\r\n";
$content .= "Connection: keep-alive\r\n\r\n";

fputs($fp, $content);

while (!feof($fp)) {
	echo fgets($fp, 8192);
}

I get a response with header information immediately, but the content comes after several minutes....if never, and I get stuck in the while loop. It never breaks out of it.

[sneakyimp]

I'm not at all sure, but it sounds to me like you might want to read up on the HTTP protocol. Or maybe just use cURL instead of trying to reinvent the wheel. If you're doing keep-alive, you may need to send some kind of content length indicator so that the remote server knows when to respond -- or parse the data returning for a length indicator (or delimiter) rather than looking for eof.

[juschillin]

Solution:

http://stackoverflow.com/questions/2384741/php-connection-keep-alive-problem-reading-socket-data