ID: 24066
Updated by: [EMAIL PROTECTED]
Reported By: jason at superlink dot net
-Status: Feedback
+Status: No Feedback
Bug Type: Sockets related
Operating System: FreeBSD 4.8
PHP Version: 4.3.2
New Comment:
No feedback was provided. The bug is being suspended because
we assume that you are no longer experiencing the problem.
If this is not the case and you are able to provide the
information that was requested earlier, please do so and
change the status of the bug back to "Open". Thank you.
Previous Comments:
------------------------------------------------------------------------
[2003-07-21 10:11:41] [EMAIL PROTECTED]
Can you try your example with var_dump($buffer) in your code?
socket_read returns boolean(FALSE) on an actual error, and empty string
"" when the connecting system has closed the connection. The connection
closed is not considered and error, and thus socket_last_error() is 0
(no error)
If you don't like this behaivior there is socket_recv, which returns
the length of the message returned(0 = connection close), and takes a
buf argument of the string, but it does not have the PHP_NORMAL_READ
capibility.
If this is the problem you should recode tests of socket_read like so
if (($buffer = socket_read($socket, 2048, xxx)) === FALSE) {
// Error has occured
} else if (empty($buffer)) {
// client disconnected
} else {
// do something with data
}
-Jason
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[2003-06-06 21:50:20] jason at superlink dot net
Okay, a few things to add to my post...
I wanted to add that my initial assessment that binary_read did not
suffer from this issue is false.
In my inital test with binary read, I thought that simply watching the
socket download data was enough to validate if the issue was with
normal_read. There was one glaring diff between normal_read and
binary_read -- my software was only able to properly process input data
from normal_read. After a bit of tweaking, I made binary_read also
function and properly parse input. Once it was processing input, it too
had socket disconnects. Without processing input, it's simply reading
in data, with processing, it has to check data with a RDBMs, which
causes a slight delay between reads.
Perhaps this bit of info can help narrow down the problem.
Also, I wanted to add that I read the bug report about socket_read()
returning an infinate number of "\n" ...
(http://bugs.php.net/bug.php?id=21760), that bug is still present in
4.3.2. I had to write a shell script to watch for cpu use over 40% and
kill the process. It seems to happen around ~5% of the time.
------------------------------------------------------------------------
[2003-06-06 14:36:06] jason at superlink dot net
I'm running a socket connection that needs NORMAL_READ mode enabled.
Here is a sample of the socket connection:
<?php
while(1){
$r = array($socket);
if(socket_select($r, $w, $except = NULL, 0)) {
if($buffer = socket_read($socket, 2048,
PHP_NORMAL_READ)) {
$data=trim($buffer);
dostuff($data);// do something with the data.
} else {
// for some reason my socket connection FAILS a
lot.
die("ERROR: failed to read socket to
$remotehost");
}
} else {
sleep(1);
}
}
?>
In the event of an error, I've been logging the error:
socket_strerror(socket_last_error())
The error for the last 5 attempts has returned:
uptime: 211 Unknown error: 0
uptime: 439 Unknown error: 0
uptime: 275 Unknown error: 0
uptime: 279 Unknown error: 0
uptime: 395 Unknown error: 0
The socket connection doesn't seem to want to stay alive for long. The
error message seems.... very unfriendly. I've tried the program in
binary mode (while my program doesn't function with binary mode on, it
can still download and read from the socket). In binary mode, the
problem does not occur.
I've tried NORMAL_READ with and without socket blocking, with the same
results (unexplained socket error).
this problem seems to have been happening in php 4.3.1 too.
Configure Command './configure' '--prefix=/usr/local'
'--with-apache=/home/jason/apache_1.3.27' '--enable-exif'
'--enable-track-vars' '--with-calendar=shared' '--enable-magic-quotes'
'--enable-trans-sid' '--enable-wddx' '--enable-sockets'
'--disable-debug' '--enable-gd-native-tt' '--with-zlib'
'--enable-inline-optimization' '--enable-memory-limit'
'--with-mysql=/usr/local'
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/?id=24066&edit=1
