Re: [PHP] Socket trouble
To prevent the blocking and your CPU going up to 100% usages look into:
http://us2.php.net/manual/en/function.socket-select.php
For length of a string:
http://us2.php.net/manual/en/function.strlen.php
- Original Message -
From: René Fournier <[EMAIL PROTECTED]>
Date: Thursday, October 28, 2004 1:04 pm
Subject: [PHP] Socket trouble
> I'm having some trouble with my socket client. I would like it to
> "notice" when the server is no longer there, and then reconnect. I
> have
> code for the reconnect, etc., but I can't figure out how to write
> the
> socket_read code so that it "notices" when the server is gone and
> then
> responds. Presently, my client just hangs (CPU goes to 100%,
> nothing
> happens.)
>
> Here's my code:
>
> while(($buf = socket_read($socket,1,PHP_BINARY_READ)) !== false) {
> $data .= $buf;
> if(preg_match("/TERMINATING/",$data)) {
> $msg_recv = 1;
> break;
> }
> }
>
> The PHP docs on socket_read suggest how this might be done:
>
> "Note: socket_read() may return a zero length string ("")
> indicating
> the end of communication (i.e. the remote end point has closed the
> connection)."
>
> Does this "end of communication" include cases when the socket
> server
> dies without gracefully disconnecting? How could my code check for
> this
> zero length string? Any help is much appreciated. Thanks!
>
> ...René
>
> ---
> René Fournier
> www.renefournier.com
>
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> PHP General Mailing List (http://www.php.net/)
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>
>
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[PHP] Socket trouble
I'm having some trouble with my socket client. I would like it to
"notice" when the server is no longer there, and then reconnect. I have
code for the reconnect, etc., but I can't figure out how to write the
socket_read code so that it "notices" when the server is gone and then
responds. Presently, my client just hangs (CPU goes to 100%, nothing
happens.)
Here's my code:
while(($buf = socket_read($socket,1,PHP_BINARY_READ)) !== false) {
$data .= $buf;
if(preg_match("/TERMINATING/",$data)) {
$msg_recv = 1;
break;
}
}
The PHP docs on socket_read suggest how this might be done:
"Note: socket_read() may return a zero length string ("") indicating
the end of communication (i.e. the remote end point has closed the
connection)."
Does this "end of communication" include cases when the socket server
dies without gracefully disconnecting? How could my code check for this
zero length string? Any help is much appreciated. Thanks!
...René
---
René Fournier
www.renefournier.com
--
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To unsubscribe, visit: http://www.php.net/unsub.php
[PHP] Socket trouble
I have written a browser class, and while the connect method seems to work
ok (it times out after 10 seconds, as desired), I'm having problems with
actually writing to the socket. For unreliable servers, it has taken up
to 15 minutes to write to the socket, whereas I would like the script to
give up after only a few seconds. I have tried:
if ($this->connection->socket) socket_set_timeout($this->connection->socket,
1);
setting the socket timeout to 1 second, but it only serves to aggravate
the problem. Am I doing something wrong? Is there some way to get it to
give up writing to the socket after a few seconds? [I'm using the latest
stable PHP, freshly compiled on Open BSD; socket_set_timeout does appear
to be working, but not as I desire.
(my browser constructor looks like this:
$this->ua=$ua;
$this->host=$host;
$this->proxy=$proxy;
if ($proxy) $this->connection=new
connection($proxy,$proxyport,$timeout);
else $this->connection=new connection($host);
if (!$this->connection->socket) $this->failure=1; // failure :-(
// if ($this->connection->socket) socket_set_timeout($this->connection-
>socket,1);
also
class connection { // This is a low-level socket class.
function connection($host,$port=80,$timeout=10) {
if (!$host) "You need a host!";
$this->socket=fsockopen($host,$port,&$errno,&$errtext,$timeout);
}
function close() {
fclose($this->socket);
}
function put($string) {
if (!$string) die("missing argument \$string to connection->put");
if (!$this->socket) return 0;
fputs($this->socket,$string);
return 1;
}
function get($packet=128) { // Packet size
if (!$this->socket) return 0;
return fgets($this->socket,$packet);
}
}
)
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