ID: 10092
User Update by: [EMAIL PROTECTED]
Old-Status: Feedback
Status: Open
Bug Type: Sockets related
Description: Socket fgets memory and CPU usage problem
The code snippet:
test.php:
<!--
This is a PHP POP3 Socket Test that demonstrates a Windows PHP CGI bug which consumes
the transfered data thru the socket
and never releases them. Each round of the for cycle below gets slower and slower and
never finishes the end.
To test it edit the POP3 server variables below. Make sure there's only one 500K
message in the POP3 mailbox.
Then run the test. Currently the PHP gives up in the 11th cycle. On windows 9x the PHP
stops running. On windows
NT/2000 the PHP goes crazy, consumes 100% CPU and never finishes.
Please, contact me:
Jakub Klos
[EMAIL PROTECTED]
-->
<HTML>
<HEAD>
<TITLE>Test</TITLE>
</HEAD>
<BODY>
PHP POP3 Socket Test<BR><BR>
<?
$server = "localhost";
$port = 110;
$user = "user";
$pass = "pass";
$round = 20;
// connect to the POP3 server and read the response
$socket = fsockopen($server, $port);
$line = fgets($socket, 1024);
// USER and PASS commands
fputs($socket, "USER $user\r\n");
$line = fgets($socket, 1024);
fputs($socket, "PASS $pass\r\n");
$line = fgets($socket, 1024);
$length = 0;
for ($i = 1; $i < $round + 1; $i++)
{
// RETR command to receive the message
fputs($socket, "RETR 1\r\n");
$line = fgets($socket, 1024);
if ($line[0] == "-") break;
while (($line = fgets($socket, 1024)) <> ".\r\n")
{
if (!($line)) break;
$length += strlen($line);
}
echo "Round $i/$round, Transfered $length<BR>";
flush();
}
fclose($socket);
echo "Total bytes received: $length";
?>
</BODY>
</HTML>
Previous Comments:
---------------------------------------------------------------------------
[2001-03-31 17:18:02] [EMAIL PROTECTED]
Please add a self containing short script into this report
which can be used to reproduce this problem.
--Jani
---------------------------------------------------------------------------
[2001-03-31 09:56:39] [EMAIL PROTECTED]
When using the fgets function for large data transmission the data transmitted are
never freed from memory. When using fgets with files it works fine. The PHP CGI module
starts to utilize the CPU to 100% and never ends, stops processing and doesn't exit
the fgets function after few read cycles. This happens only on Windows PHP CGI. We
tested Apache and that worked fine. Even the previous version of PHP did that. Large
data I'm talking about is 8MB and above.
---------------------------------------------------------------------------
Full Bug description available at: http://bugs.php.net/?id=10092
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