PHP 5.4.36 Released

EventBufferEvent::connect

(PECL event >= 1.2.6-beta)

EventBufferEvent::connectConnect buffer event's file descriptor to given address or UNIX socket

说明

public bool EventBufferEvent::connect ( string $addr )

Connect buffer event's file descriptor to given address(optionally with port), or a UNIX domain socket.

If socket is not assigned to the buffer event, this function allocates a new socket and makes it non-blocking internally.

To resolve DNS names(asyncronously), use EventBufferEvent::connectHost() method.

参数

addr

Should contain an IP address with optional port number, or a path to UNIX domain socket. Recognized formats are:

[IPv6Address]:port
[IPv6Address]
IPv6Address
IPv4Address:port
IPv4Address
unix:path
Note, 'unix:' prefix is currently not case sensitive.

返回值

Returns TRUE on success. Otherwise FALSE.

范例

Example #1 EventBufferEvent::connect() example

<?php
/*
 * 1. Connect to 127.0.0.1 at port 80
 * by means of EventBufferEvent::connect().
 *
 * 2. Request /index.cphp via HTTP/1.0
 * using the output buffer.
 *
 * 3. Asyncronously read the response and print it to stdout.
 */

/* Read callback */
function readcb($bev$base) {
    
$input $bev->getInput();

    while ((
$n $input->remove($buf1024)) > 0) {
        echo 
$buf;
    }
}

/* Event callback */
function eventcb($bev$events$base) {
    if (
$events EventBufferEvent::CONNECTED) {
        echo 
"Connected.\n";
    } elseif (
$events & (EventBufferEvent::ERROR EventBufferEvent::EOF)) {
        if (
$events EventBufferEvent::ERROR) {
            echo 
"DNS error: "$bev->getDnsErrorString(), PHP_EOL;
        }

        echo 
"Closing\n";
        
$base->exit();
        exit(
"Done\n");
    }
}

$base = new EventBase();

echo 
"step 1\n";
$bev = new EventBufferEvent($base/* use internal socket */ NULL,
    
EventBufferEvent::OPT_CLOSE_ON_FREE EventBufferEvent::OPT_DEFER_CALLBACKS);
if (!
$bev) {
    exit(
"Failed creating bufferevent socket\n");
}

echo 
"step 2\n";
$bev->setCallbacks("readcb"/* writecb */ NULL"eventcb"$base);
$bev->enable(Event::READ Event::WRITE);

echo 
"step 3\n";
/* Send request */
$output $bev->getOutput();
if (!
$output->add(
    
"GET /index.cphp HTTP/1.0\r\n".
    
"Connection: Close\r\n\r\n"
)) {
    exit(
"Failed adding request to output buffer\n");
}

/* Connect to the host syncronously.
 * We know the IP, and don't need to resolve DNS. */
if (!$bev->connect("127.0.0.1:80")) {
    exit(
"Can't connect to host\n");
}

/* Dispatch pending events */
$base->dispatch();

以上例程的输出类似于:

step 1
step 2
step 3
Connected.
HTTP/1.1 200 OK
Server: nginx/1.2.6
Date: Sat, 09 Mar 2013 10:06:58 GMT
Content-Type: text/html; charset=utf-8
Connection: close
X-Powered-By: PHP/5.4.11--pl2-gentoo

sdfsdfsf
Closing
Done

Example #2 Connect to UNIX domain socket which presumably is served by a server, read response from the server and output it to the console

<?php
class MyUnixSocketClient {
    private 
$base$bev;

    function 
__construct($base$sock_path) {
        
$this->base $base;
        
$this->bev = new EventBufferEvent($baseNULLEventBufferEvent::OPT_CLOSE_ON_FREE,
            array (
$this"read_cb"), NULL, array ($this"event_cb"));

        if (!
$this->bev->connect("unix:$sock_path")) {
            
trigger_error("Failed to connect to socket `$sock_path'"E_USER_ERROR);
        }

        
$this->bev->enable(Event::READ);
    }

    function 
__destruct() {
        if (
$this->bev) {
            
$this->bev->free();
            
$this->bev NULL;
        }
    }

    function 
dispatch() {
        
$this->base->dispatch();
    }

    function 
read_cb($bev$unused) {
        
$in $bev->input;

        
printf("Received %ld bytes\n"$in->length);
        
printf("----- data ----\n");
        
printf("%ld:\t%s\n", (int) $in->length$in->pullup(-1));

        
$this->bev->free();
        
$this->bev NULL;
        
$this->base->exit(NULL);
    }

    function 
event_cb($bev$events$unused) {
        if (
$events EventBufferEvent::ERROR) {
            echo 
"Error from bufferevent\n";
        }

        if (
$events & (EventBufferEvent::EOF EventBufferEvent::ERROR)) {
            
$bev->free();
            
$bev NULL;
        } elseif (
$events EventBufferEvent::CONNECTED) {
            
$bev->output->add("test\n");
        }
    }
}

if (
$argc <= 1) {
    exit(
"Socket path is not provided\n");
}
$sock_path $argv[1];

$base = new EventBase();
$cl = new MyUnixSocketClient($base$sock_path);
$cl->dispatch();
?>

以上例程的输出类似于:

Received 5 bytes
----- data ----
5:  test

参见

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