From: rdlowrey at gmail dot com
Operating system: Fedora 17
PHP version: 5.4.15
Package: Streams related
Bug Type: Bug
Bug description:async stream_socket_client return
Description:
------------
Normally when creating a client socket connection asynchronously you have
to wait
until the socket stream can be selected as writable to determine whether or
not
the connection succeeded. However, when connecting to a nonexistent server
on the
loopback address there is no way to differentiate between a failed
connection and
a successful connection using the STREAM_CLIENT_ASYNC_CONNECT flag.
The example code connects to a nonexistent server so it should always fail.
PHP
reports the connection as having succeeded and it's not until you actually
attempt to read or write to the socket stream that you can get an accurate
`feof()` return value.
Test script:
---------------
<?php
$uri = '127.0.0.1:9000'; // <-- NOTHING LISTENING ON THIS PORT!
$flags = STREAM_CLIENT_CONNECT | STREAM_CLIENT_ASYNC_CONNECT;
$socket = stream_socket_client($uri, $errNo, $errStr, $timeout=42,
$flags);
usleep(50000); // just in case
var_dump($socket); // resource(5) of type (stream)
$w = [$socket];
$r = $e = [];
if (stream_select($r, $w, $e, 0, 0)) {
$selectedSock = current($w);
var_dump($selectedSock); // resource(5) of type (stream) ... says it's
writable, BUT IT CAN'T POSSIBLY BE WRITABLE
}
$r = [$socket];
$w = $e = [];
if (stream_select($r, $w, $e, 0, 0)) {
$selectedSock = current($r);
var_dump($selectedSock); // resource(5) of type (stream) ... says it's
readable, let's check for EOF
}
usleep(50000); // just in case
$isFeof = feof($selectedSock);
var_dump($isFeof); // bool(false) ... not EOF ... WTF?
var_dump(fread($selectedSock, 8192)); // string(0) ""
var_dump(feof($selectedSock)); // bool(TRUE) -- Now we know the truth!
Expected result:
----------------
feof($socket) on an asynchronously connected socket stream should return
TRUE if
the connection attempt failed once the socket becomes "writable."
Actual result:
--------------
It's not possible to determine if the connection attempt failed without
first
attempting to read/write to/from the socket stream.
--
Edit bug report at https://bugs.php.net/bug.php?id=64803&edit=1
--
Try a snapshot (PHP 5.4):
https://bugs.php.net/fix.php?id=64803&r=trysnapshot54
Try a snapshot (PHP 5.3):
https://bugs.php.net/fix.php?id=64803&r=trysnapshot53
Try a snapshot (trunk):
https://bugs.php.net/fix.php?id=64803&r=trysnapshottrunk
Fixed in SVN: https://bugs.php.net/fix.php?id=64803&r=fixed
Fixed in release: https://bugs.php.net/fix.php?id=64803&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=64803&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=64803&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=64803&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=64803&r=support
Expected behavior: https://bugs.php.net/fix.php?id=64803&r=notwrong
Not enough info:
https://bugs.php.net/fix.php?id=64803&r=notenoughinfo
Submitted twice:
https://bugs.php.net/fix.php?id=64803&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=64803&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=64803&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=64803&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=64803&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=64803&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=64803&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=64803&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=64803&r=mysqlcfg
