get socket error string when async connect fails
anybody knows if its possible to retrieve some error info (like getsockopt SO_ERROR in C) if an async connect like the following fails btw: im not using the socket extension cause streams provide an ssl wrapper
<?php
$ctx = stream_context_create();
stream_context_set_params($ctx, array("notification" => "stream_notification_callback"));
$destination = "tcp://92.247.12.242:8081";
$socket = stream_socket_client($destination, $errno, $errstr,
10, STREAM_CLIENT_CONNECT | STREAM_CLIENT_ASYNC_CONNECT, $ctx);a
// plain socket
var_dump($socket);
// no error as expected
var_dump($errno);
var_dump($errstr);
stream_set_blocking($socket, false);
/* Prepare the read array */
$read = array($socket);
$write = array($socket);
$except = NULL;
if (false === ($num_changed_streams = stream_select($read, $write, $except, 10))) {
var_dump("select failed?");
/* Error handling */
} elseif ($num_changed_streams > 0) {
/* At least on one of the streams something interesting happened */
var_dump("event");
// read fails, so the connect fails bu开发者_运维百科t why?
$result = stream_socket_recvfrom($socket, 1024);
var_dump($result);
// no error again
var_dump($errno);
var_dump($errstr);
// nothing interesting
var_dump(stream_get_meta_data($socket));
}
// wont get called
function stream_notification_callback($notification_code, $severity, $message, $message_code, $bytes_transferred, $bytes_max) {
$args = func_get_args();
var_dump($args);
}
thx
I'm having the same issue as described. I have found a bit of a workaround:
I wrap each of my 'streams' in a Stream
class and set a timeout property. Before I call connect, I generate a timestamp of when the timeout should occur. I then have a loop in a Manager
class which calls stream_select()
.
Successful connections are placed in the $write
array. I have another call at the bottom of the loop that calls $stream->checkTimeout()
. Within that there is a stream_select()
call with 0 set for tv_sec
and tv_usec
. If $this->conn doesn't appear within $write
, I assume it has timed out.
As far as I understand errors in stream functions should generate PHP warning messages. I think the only way would be to trap these using set_error_handler() and process them there.
I ran into this issue as well. Solution I found is to use stream_socket_get_name. If you want this all wrapped up in a nice library checkout http://drupal.org/project/httprl. It still requires drupal, but mainly for settings & error handling; you can modify the code a little bit and it should run on its own.
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