#49759 [NEW]: socket_read() fails to return empty string
From: chmod3 at googlemail dot com
Operating system: WinVista & FreeBSD
PHP version: 5.3.0
PHP Bug Type: Sockets related
Bug description: socket_read() fails to return empty string
Description:
According to documentation:
"Note: socket_read() returns a zero length string ("") when there is no
more data to read."
This does not seem to be the case on my installations:
PHP 5.3.0 WinVista
PHP 5.2.11 WinVista
PHP 5.2.11 FreeBSD
PHP 5.2.10 WinVista
PHP 5.2.9 WinVista
socket_read() just hangs.
Reproduce code:
---
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
$connection = socket_connect($socket, 'news.giganews.com', 119);
$response = '';
do {
$recv = '';
echo "START READ\n";
$recv = socket_read($socket, 512);
echo "END READ\n";
var_dump($recv);
if($recv != '') {
$response .= $recv;
}
} while($recv != '');
echo 'OUTPUT: ' . $reply;
Expected result:
START READ
END READ
string(23) "200 News.GigaNews.Com
"
START READ
END READ
OUTPUT: 200 News.GigaNews.Com
Actual result:
--
START READ
END READ
string(23) "200 News.GigaNews.Com
"
START READ
--
Edit bug report at http://bugs.php.net/?id=49759&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=49759&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=49759&r=trysnapshot53
Try a snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=49759&r=trysnapshot60
Fixed in SVN:
http://bugs.php.net/fix.php?id=49759&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=49759&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=49759&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=49759&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=49759&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=49759&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=49759&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=49759&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=49759&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=49759&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=49759&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=49759&r=php4
Daylight Savings:http://bugs.php.net/fix.php?id=49759&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=49759&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=49759&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=49759&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=49759&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=49759&r=mysqlcfg
#49759 [Com]: socket_read() fails to return empty string
ID: 49759
Comment by: chmod3 at googlemail dot com
Reported By: chmod3 at googlemail dot com
Status: Feedback
Bug Type: Sockets related
Operating System: WinVista & FreeBSD
PHP Version: 5.3.0
New Comment:
Yes your code works only if PHP_NORMAL_READ is added. Adding
PHP_BINARY_READ or ommiting either will make it hang. I was hoping to
use binary so my script will handle the /r/n
CODE
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
$connection = socket_connect($socket, 'news.giganews.com', 119);
do {
echo "-- START READ\n";
$recv = socket_read($socket, 512, PHP_NORMAL_READ);
var_dump($recv);
echo "-- END READ\n";
} while ($recv !== '' && $recv !== FALSE && $recv !== "\n");
Previous Comments:
[2009-10-03 13:46:07] f...@php.net
I think your example code makes no sense.
When I change it a bit, it works as expected (Did you check PHP_BINARY
READ vs. PHP_NORMAL_READ?)
I do agree that the docs could be clarified.
--------------------
[2009-10-03 12:42:42] chmod3 at googlemail dot com
Description:
According to documentation:
"Note: socket_read() returns a zero length string ("") when there is no
more data to read."
This does not seem to be the case on my installations:
PHP 5.3.0 WinVista
PHP 5.2.11 WinVista
PHP 5.2.11 FreeBSD
PHP 5.2.10 WinVista
PHP 5.2.9 WinVista
socket_read() just hangs.
Reproduce code:
---
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
$connection = socket_connect($socket, 'news.giganews.com', 119);
$response = '';
do {
$recv = '';
echo "START READ\n";
$recv = socket_read($socket, 512);
echo "END READ\n";
var_dump($recv);
if($recv != '') {
$response .= $recv;
}
} while($recv != '');
echo 'OUTPUT: ' . $reply;
Expected result:
START READ
END READ
string(23) "200 News.GigaNews.Com
"
START READ
END READ
OUTPUT: 200 News.GigaNews.Com
Actual result:
--
START READ
END READ
string(23) "200 News.GigaNews.Com
"
START READ
--
Edit this bug report at http://bugs.php.net/?id=49759&edit=1
#49759 [Fbk->Opn]: socket_read() fails to return empty string
ID: 49759
User updated by: chmod3 at googlemail dot com
Reported By: chmod3 at googlemail dot com
-Status: Feedback
+Status: Open
Bug Type: Sockets related
Operating System: WinVista & FreeBSD
PHP Version: 5.3.0
New Comment:
So is socket_read() supposed to hang by design when in PHP_BINARY_READ
mode when there is no more data to read?
Previous Comments:
[2009-10-03 14:14:53] chmod3 at googlemail dot com
Yes your code works only if PHP_NORMAL_READ is added. Adding
PHP_BINARY_READ or ommiting either will make it hang. I was hoping to
use binary so my script will handle the /r/n
CODE
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
$connection = socket_connect($socket, 'news.giganews.com', 119);
do {
echo "-- START READ\n";
$recv = socket_read($socket, 512, PHP_NORMAL_READ);
var_dump($recv);
echo "-- END READ\n";
} while ($recv !== '' && $recv !== FALSE && $recv !== "\n");
[2009-10-03 13:46:07] f...@php.net
I think your example code makes no sense.
When I change it a bit, it works as expected (Did you check PHP_BINARY
READ vs. PHP_NORMAL_READ?)
I do agree that the docs could be clarified.
--------------------
[2009-10-03 12:42:42] chmod3 at googlemail dot com
Description:
According to documentation:
"Note: socket_read() returns a zero length string ("") when there is no
more data to read."
This does not seem to be the case on my installations:
PHP 5.3.0 WinVista
PHP 5.2.11 WinVista
PHP 5.2.11 FreeBSD
PHP 5.2.10 WinVista
PHP 5.2.9 WinVista
socket_read() just hangs.
Reproduce code:
---
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
$connection = socket_connect($socket, 'news.giganews.com', 119);
$response = '';
do {
$recv = '';
echo "START READ\n";
$recv = socket_read($socket, 512);
echo "END READ\n";
var_dump($recv);
if($recv != '') {
$response .= $recv;
}
} while($recv != '');
echo 'OUTPUT: ' . $reply;
Expected result:
START READ
END READ
string(23) "200 News.GigaNews.Com
"
START READ
END READ
OUTPUT: 200 News.GigaNews.Com
Actual result:
--
START READ
END READ
string(23) "200 News.GigaNews.Com
"
START READ
--
Edit this bug report at http://bugs.php.net/?id=49759&edit=1
#49759 [Opn->Bgs]: socket_read() fails to return empty string
ID: 49759
User updated by: chmod3 at googlemail dot com
Reported By: chmod3 at googlemail dot com
-Status: Open
+Status: Bogus
Bug Type: Sockets related
Operating System: WinVista & FreeBSD
PHP Version: 5.3.0
New Comment:
Understood, so it's a documentation 'bug'.
Previous Comments:
[2009-10-04 18:09:40] sjo...@php.net
socket_read() intentionally blocks until there is some data.
[2009-10-04 09:42:15] chmod3 at googlemail dot com
So is socket_read() supposed to hang by design when in PHP_BINARY_READ
mode when there is no more data to read?
[2009-10-03 14:14:53] chmod3 at googlemail dot com
Yes your code works only if PHP_NORMAL_READ is added. Adding
PHP_BINARY_READ or ommiting either will make it hang. I was hoping to
use binary so my script will handle the /r/n
CODE
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
$connection = socket_connect($socket, 'news.giganews.com', 119);
do {
echo "-- START READ\n";
$recv = socket_read($socket, 512, PHP_NORMAL_READ);
var_dump($recv);
echo "-- END READ\n";
} while ($recv !== '' && $recv !== FALSE && $recv !== "\n");
[2009-10-03 13:46:07] f...@php.net
I think your example code makes no sense.
When I change it a bit, it works as expected (Did you check PHP_BINARY
READ vs. PHP_NORMAL_READ?)
I do agree that the docs could be clarified.
--------------------
[2009-10-03 12:42:42] chmod3 at googlemail dot com
Description:
According to documentation:
"Note: socket_read() returns a zero length string ("") when there is no
more data to read."
This does not seem to be the case on my installations:
PHP 5.3.0 WinVista
PHP 5.2.11 WinVista
PHP 5.2.11 FreeBSD
PHP 5.2.10 WinVista
PHP 5.2.9 WinVista
socket_read() just hangs.
Reproduce code:
---
$socket = socket_create(AF_INET, SOCK_STREAM, SOL_TCP);
$connection = socket_connect($socket, 'news.giganews.com', 119);
$response = '';
do {
$recv = '';
echo "START READ\n";
$recv = socket_read($socket, 512);
echo "END READ\n";
var_dump($recv);
if($recv != '') {
$response .= $recv;
}
} while($recv != '');
echo 'OUTPUT: ' . $reply;
Expected result:
START READ
END READ
string(23) "200 News.GigaNews.Com
"
START READ
END READ
OUTPUT: 200 News.GigaNews.Com
Actual result:
--
START READ
END READ
string(23) "200 News.GigaNews.Com
"
START READ
--
Edit this bug report at http://bugs.php.net/?id=49759&edit=1
