EventBufferEvent::connect
(PECL event >= 1.2.6-beta)
EventBufferEvent::connect — Connect buffer event's file descriptor to given address or UNIX socket
Описание
public
bool
EventBufferEvent::connect
(
string
$addr
)Connect buffer event's file descriptor to given address(optionally with port), or a UNIX domain socket.
If socket is not assigned to the buffer event, this function allocates a new socket and makes it non-blocking internally.
To resolve DNS names(asyncronously), use EventBufferEvent::connectHost() method.
Список параметров
-
addr -
Should contain an IP address with optional port number, or a path to UNIX domain socket. Recognized formats are:
Note, 'unix:' prefix is currently not case sensitive.[IPv6Address]:port [IPv6Address] IPv6Address IPv4Address:port IPv4Address unix:path
Возвращаемые значения
Returns TRUE on success. Otherwise FALSE.
Примеры
Пример #1 EventBufferEvent::connect() example
<?php
/*
* 1. Connect to 127.0.0.1 at port 80
* by means of EventBufferEvent::connect().
*
* 2. Request /index.cphp via HTTP/1.0
* using the output buffer.
*
* 3. Asyncronously read the response and print it to stdout.
*/
/* Read callback */
function readcb($bev, $base) {
$input = $bev->getInput();
while (($n = $input->remove($buf, 1024)) > 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();
Результатом выполнения данного примера будет что-то подобное:
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
Пример #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;
$this->bev = new EventBufferEvent($base, NULL, EventBufferEvent::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();
?>
Результатом выполнения данного примера будет что-то подобное:
Received 5 bytes ----- data ---- 5: test
Смотрите также
- EventBufferEvent::connectHost() - Connects to a hostname with optionally asyncronous DNS resolving
- EventBufferEvent::close
- EventBufferEvent::connect
- Функция EventBufferEvent::connectHost() - Connects to a hostname with optionally asyncronous DNS resolving
- Функция EventBufferEvent::__construct() - Constructs EventBufferEvent object
- Функция EventBufferEvent::createPair() - Creates two buffer events connected to each other
- Функция EventBufferEvent::disable() - Disable events read, write, or both on a buffer event.
- Функция EventBufferEvent::enable() - Enable events read, write, or both on a buffer event.
- Функция EventBufferEvent::free() - Free a buffer event
- Функция EventBufferEvent::getDnsErrorString() - Returns string describing the last failed DNS lookup attempt
- Функция EventBufferEvent::getEnabled() - Returns bitmask of events currently enabled on the buffer event
- EventBufferEvent::getInput
- EventBufferEvent::getOutput
- Функция EventBufferEvent::read() - Read buffer's data
- Функция EventBufferEvent::readBuffer() - Drains the entire contents of the input buffer and places them into buf
- Функция EventBufferEvent::setCallbacks() - Assigns read, write and event(status) callbacks
- Функция EventBufferEvent::setPriority() - Assign a priority to a bufferevent
- Функция EventBufferEvent::setTimeouts() - Set the read and write timeout for a buffer event
- Функция EventBufferEvent::setWatermark() - Adjusts read and/or write watermarks
- Функция EventBufferEvent::sslError() - Returns most recent OpenSSL error reported on the buffer event
- Функция EventBufferEvent::sslFilter() - Create a new SSL buffer event to send its data over another buffer event
- EventBufferEvent::sslGetCipherInfo
- EventBufferEvent::sslGetCipherName
- EventBufferEvent::sslGetCipherVersion
- EventBufferEvent::sslGetProtocol
- Функция EventBufferEvent::sslRenegotiate() - Tells a bufferevent to begin SSL renegotiation.
- Функция EventBufferEvent::sslSocket() - Creates a new SSL buffer event to send its data over an SSL on a socket
- Функция EventBufferEvent::write() - Adds data to a buffer event's output buffer
- EventBufferEvent::writeBuffer
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