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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<meta http-equiv="x-ua-compatible" content="ie=edge">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<title>SocketClient: SocketClient Component - ReactPHP</title>
<meta name="description" content="[Legacy] Async, streaming plaintext TCP/IP and secure TLS based connections for ReactPHP.">
<link rel="apple-touch-icon" sizes="180x180" href="https://reactphp.org/apple-touch-icon.png">
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<link rel="manifest" href="https://reactphp.org/manifest.json">
<link rel="mask-icon" href="https://reactphp.org/safari-pinned-tab.svg" color="#4f5b93">
<meta name="apple-mobile-web-app-title" content="ReactPHP">
<meta name="application-name" content="ReactPHP">
<meta name="theme-color" content="#f4f3f1">
<meta name="msapplication-config" content="https://reactphp.org/browserconfig.xml" />
<meta property="og:image" content="https://reactphp.org/og-image.png">
<link rel="preload" href="../assets/sourcesanspro-regular.f84b2bd4.woff" as="font" type="font/woff" crossorigin>
<link rel="preload" href="../assets/sourcesanspro-bold.cb7d3610.woff" as="font" type="font/woff" crossorigin>
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<h1>SocketClient</h1>
<div class="markdown-heading"><h1 class="heading-element">SocketClient Component</h1><a id="socketclient-component" class="anchor" aria-label="Permalink: SocketClient Component" href="#socketclient-component"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p><a href="http://travis-ci.org/reactphp/socket-client" rel="nofollow"><img src="https://camo.githubusercontent.com/0d33b5f25e658ce81a405b53a7f5ddcc575d4d5ebdece239f09bf4fbd5045908/68747470733a2f2f7365637572652e7472617669732d63692e6f72672f72656163747068702f736f636b65742d636c69656e742e706e673f6272616e63683d6d6173746572" alt="Build Status" data-canonical-src="https://secure.travis-ci.org/reactphp/socket-client.png?branch=master" style="max-width: 100%;"></a> <a href="https://codeclimate.com/github/reactphp/socket-client" rel="nofollow"><img src="https://camo.githubusercontent.com/62f09c8c5e7d1d27bb58c5c51f592debe2eedbeb973d3cf1643f9d3c04826a29/68747470733a2f2f636f6465636c696d6174652e636f6d2f6769746875622f72656163747068702f736f636b65742d636c69656e742f6261646765732f6770612e737667" alt="Code Climate" data-canonical-src="https://codeclimate.com/github/reactphp/socket-client/badges/gpa.svg" style="max-width: 100%;"></a></p>
<p>Async, streaming plaintext TCP/IP and secure TLS based connections for <a href="https://reactphp.org/" rel="nofollow">ReactPHP</a></p>
<p>You can think of this library as an async version of
<a href="http://www.php.net/function.fsockopen" rel="nofollow"><code>fsockopen()</code></a> or
<a href="http://php.net/function.stream-socket-client" rel="nofollow"><code>stream_socket_client()</code></a>.
If you want to transmit and receive data to/from a remote server, you first
have to establish a connection to the remote end.
Establishing this connection through the internet/network may take some time
as it requires several steps (such as resolving target hostname, completing
TCP/IP handshake and enabling TLS) in order to complete.
This component provides an async version of all this so you can establish and
handle multiple connections without blocking.</p>
<p><strong>Table of Contents</strong></p>
<ul>
<li>
<a href="#usage">Usage</a>
<ul>
<li>
<a href="#connectorinterface">ConnectorInterface</a>
<ul>
<li><a href="#connect">connect()</a></li>
</ul>
</li>
<li>
<a href="#connectioninterface">ConnectionInterface</a>
<ul>
<li><a href="#getremoteaddress">getRemoteAddress()</a></li>
<li><a href="#getlocaladdress">getLocalAddress()</a></li>
</ul>
</li>
<li><a href="#connector">Connector</a></li>
</ul>
</li>
<li>
<a href="#advanced-usage">Advanced Usage</a>
<ul>
<li><a href="#tcpconnector">TcpConnector</a></li>
<li><a href="#dnsconnector">DnsConnector</a></li>
<li><a href="#secureconnector">SecureConnector</a></li>
<li><a href="#timeoutconnector">TimeoutConnector</a></li>
<li><a href="#unixconnector">UnixConnector</a></li>
</ul>
</li>
<li><a href="#install">Install</a></li>
<li><a href="#tests">Tests</a></li>
<li><a href="#license">License</a></li>
</ul>
<div class="markdown-heading"><h2 class="heading-element">Usage</h2><a id="usage" class="anchor" aria-label="Permalink: Usage" href="#usage"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<div class="markdown-heading"><h3 class="heading-element">ConnectorInterface</h3><a id="connectorinterface" class="anchor" aria-label="Permalink: ConnectorInterface" href="#connectorinterface"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>The <code>ConnectorInterface</code> is responsible for providing an interface for
establishing streaming connections, such as a normal TCP/IP connection.</p>
<p>This is the main interface defined in this package and it is used throughout
React's vast ecosystem.</p>
<p>Most higher-level components (such as HTTP, database or other networking
service clients) accept an instance implementing this interface to create their
TCP/IP connection to the underlying networking service.
This is usually done via dependency injection, so it's fairly simple to actually
swap this implementation against any other implementation of this interface.</p>
<p>The interface only offers a single method:</p>
<div class="markdown-heading"><h4 class="heading-element">connect()</h4><a id="connect" class="anchor" aria-label="Permalink: connect()" href="#connect"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>The <code>connect(string $uri): PromiseInterface<ConnectionInterface, Exception></code> method
can be used to create a streaming connection to the given remote address.</p>
<p>It returns a <a href="../promise/">Promise</a> which either
fulfills with a stream implementing <a href="#connectioninterface"><code>ConnectionInterface</code></a>
on success or rejects with an <code>Exception</code> if the connection is not successful:</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>connector</span>-><span class="pl-en">connect</span>(<span class="pl-s">'<span class="pl-s">google.com:443</span>'</span>)-><span class="pl-en">then</span>(
<span class="pl-k">function</span> (<span class="pl-smi"><span class="pl-smi">ConnectionInterface</span></span> <span class="pl-s1"><span class="pl-c1">$</span>connection</span>) {
<span class="pl-c">// connection successfully established</span>
},
<span class="pl-k">function</span> (<span class="pl-smi"><span class="pl-smi">Exception</span></span> <span class="pl-s1"><span class="pl-c1">$</span>error</span>) {
<span class="pl-c">// failed to connect due to $error</span>
}
);</pre></div>
<p>See also <a href="#connectioninterface"><code>ConnectionInterface</code></a> for more details.</p>
<p>The returned Promise MUST be implemented in such a way that it can be
cancelled when it is still pending. Cancelling a pending promise MUST
reject its value with an <code>Exception</code>. It SHOULD clean up any underlying
resources and references as applicable:</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>promise</span> = <span class="pl-s1"><span class="pl-c1">$</span>connector</span>-><span class="pl-en">connect</span>(<span class="pl-s1"><span class="pl-c1">$</span>uri</span>);
<span class="pl-s1"><span class="pl-c1">$</span>promise</span>-><span class="pl-en">cancel</span>();</pre></div>
<div class="markdown-heading"><h3 class="heading-element">ConnectionInterface</h3><a id="connectioninterface" class="anchor" aria-label="Permalink: ConnectionInterface" href="#connectioninterface"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>The <code>ConnectionInterface</code> is used to represent any outgoing connection,
such as a normal TCP/IP connection.</p>
<p>An outgoing connection is a duplex stream (both readable and writable) that
implements React's
<a href="../stream/#duplexstreaminterface"><code>DuplexStreamInterface</code></a>.
It contains additional properties for the local and remote address
where this connection has been established to.</p>
<p>Most commonly, instances implementing this <code>ConnectionInterface</code> are returned
by all classes implementing the <a href="#connectorinterface"><code>ConnectorInterface</code></a>.</p>
<blockquote>
<p>Note that this interface is only to be used to represent the client-side end
of an outgoing connection.
It MUST NOT be used to represent an incoming connection in a server-side context.
If you want to accept incoming connections,
use the <a href="../socket/"><code>Socket</code></a> component instead.</p>
</blockquote>
<p>Because the <code>ConnectionInterface</code> implements the underlying
<a href="../stream/#duplexstreaminterface"><code>DuplexStreamInterface</code></a>
you can use any of its events and methods as usual:</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">on</span>(<span class="pl-s">'<span class="pl-s">data</span>'</span>, <span class="pl-k">function</span> (<span class="pl-s1"><span class="pl-c1">$</span>chunk</span>) {
<span class="pl-k">echo</span> <span class="pl-s1"><span class="pl-c1">$</span>chunk</span>;
});
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">on</span>(<span class="pl-s">'<span class="pl-s">end</span>'</span>, <span class="pl-k">function</span> () {
<span class="pl-k">echo</span> <span class="pl-s">'<span class="pl-s">ended</span>'</span>;
});
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">on</span>(<span class="pl-s">'<span class="pl-s">error</span>'</span>, <span class="pl-k">function</span> (<span class="pl-smi"><span class="pl-smi">Exception</span></span> <span class="pl-s1"><span class="pl-c1">$</span>e</span>) {
<span class="pl-k">echo</span> <span class="pl-s">'<span class="pl-s">error: </span>'</span> . <span class="pl-s1"><span class="pl-c1">$</span>e</span>-><span class="pl-en">getMessage</span>();
});
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">on</span>(<span class="pl-s">'<span class="pl-s">close</span>'</span>, <span class="pl-k">function</span> () {
<span class="pl-k">echo</span> <span class="pl-s">'<span class="pl-s">closed</span>'</span>;
});
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">write</span>(<span class="pl-s1"><span class="pl-c1">$</span>data</span>);
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">end</span>(<span class="pl-s1"><span class="pl-c1">$</span>data</span> = <span class="pl-c1">null</span>);
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">close</span>();
<span class="pl-c">// …</span></pre></div>
<p>For more details, see the
<a href="../stream/#duplexstreaminterface"><code>DuplexStreamInterface</code></a>.</p>
<div class="markdown-heading"><h4 class="heading-element">getRemoteAddress()</h4><a id="getremoteaddress" class="anchor" aria-label="Permalink: getRemoteAddress()" href="#getremoteaddress"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>The <code>getRemoteAddress(): ?string</code> method can be used to
return the remote address (IP and port) where this connection has been
established to.</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>address</span> = <span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">getRemoteAddress</span>();
<span class="pl-k">echo</span> <span class="pl-s">'<span class="pl-s">Connected to </span>'</span> . <span class="pl-s1"><span class="pl-c1">$</span>address</span> . <span class="pl-c1">PHP_EOL</span>;</pre></div>
<p>If the remote address can not be determined or is unknown at this time (such as
after the connection has been closed), it MAY return a <code>NULL</code> value instead.</p>
<p>Otherwise, it will return the full remote address as a string value.
If this is a TCP/IP based connection and you only want the remote IP, you may
use something like this:</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>address</span> = <span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">getRemoteAddress</span>();
<span class="pl-s1"><span class="pl-c1">$</span>ip</span> = <span class="pl-en">trim</span>(<span class="pl-en">parse_url</span>(<span class="pl-s">'<span class="pl-s">tcp://</span>'</span> . <span class="pl-s1"><span class="pl-c1">$</span>address</span>, <span class="pl-c1">PHP_URL_HOST</span>), <span class="pl-s">'<span class="pl-s">[]</span>'</span>);
<span class="pl-k">echo</span> <span class="pl-s">'<span class="pl-s">Connected to </span>'</span> . <span class="pl-s1"><span class="pl-c1">$</span>ip</span> . <span class="pl-c1">PHP_EOL</span>;</pre></div>
<div class="markdown-heading"><h4 class="heading-element">getLocalAddress()</h4><a id="getlocaladdress" class="anchor" aria-label="Permalink: getLocalAddress()" href="#getlocaladdress"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>The <code>getLocalAddress(): ?string</code> method can be used to
return the full local address (IP and port) where this connection has been
established from.</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>address</span> = <span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">getLocalAddress</span>();
<span class="pl-k">echo</span> <span class="pl-s">'<span class="pl-s">Connected via </span>'</span> . <span class="pl-s1"><span class="pl-c1">$</span>address</span> . <span class="pl-c1">PHP_EOL</span>;</pre></div>
<p>If the local address can not be determined or is unknown at this time (such as
after the connection has been closed), it MAY return a <code>NULL</code> value instead.</p>
<p>Otherwise, it will return the full local address as a string value.</p>
<p>This method complements the <a href="#getremoteaddress"><code>getRemoteAddress()</code></a> method,
so they should not be confused.</p>
<p>If your system has multiple interfaces (e.g. a WAN and a LAN interface),
you can use this method to find out which interface was actually
used for this connection.</p>
<div class="markdown-heading"><h3 class="heading-element">Connector</h3><a id="connector" class="anchor" aria-label="Permalink: Connector" href="#connector"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>The <code>Connector</code> class is the main class in this package that implements the
<a href="#connectorinterface"><code>ConnectorInterface</code></a> and allows you to create streaming connections.</p>
<p>You can use this connector to create any kind of streaming connections, such
as plaintext TCP/IP, secure TLS or local Unix connection streams.</p>
<p>It binds to the main event loop and can be used like this:</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>loop</span> = <span class="pl-v">React</span>\<span class="pl-v">EventLoop</span>\Factory::<span class="pl-en">create</span>();
<span class="pl-s1"><span class="pl-c1">$</span>connector</span> = <span class="pl-k">new</span> <span class="pl-v">Connector</span>(<span class="pl-s1"><span class="pl-c1">$</span>loop</span>);
<span class="pl-s1"><span class="pl-c1">$</span>connector</span>-><span class="pl-en">connect</span>(<span class="pl-s1"><span class="pl-c1">$</span>uri</span>)-><span class="pl-en">then</span>(<span class="pl-k">function</span> (<span class="pl-smi"><span class="pl-smi">ConnectionInterface</span></span> <span class="pl-s1"><span class="pl-c1">$</span>connection</span>) {
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">write</span>(<span class="pl-s">'<span class="pl-s">...</span>'</span>);
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">end</span>();
});
<span class="pl-s1"><span class="pl-c1">$</span>loop</span>-><span class="pl-en">run</span>();</pre></div>
<p>In order to create a plaintext TCP/IP connection, you can simply pass a host
and port combination like this:</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>connector</span>-><span class="pl-en">connect</span>(<span class="pl-s">'<span class="pl-s">www.google.com:80</span>'</span>)-><span class="pl-en">then</span>(<span class="pl-k">function</span> (<span class="pl-smi"><span class="pl-smi">ConnectionInterface</span></span> <span class="pl-s1"><span class="pl-c1">$</span>connection</span>) {
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">write</span>(<span class="pl-s">'<span class="pl-s">...</span>'</span>);
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">end</span>();
});</pre></div>
<blockquote>
<p>If you do no specify a URI scheme in the destination URI, it will assume
<code>tcp://</code> as a default and establish a plaintext TCP/IP connection.
Note that TCP/IP connections require a host and port part in the destination
URI like above, all other URI components are optional.</p>
</blockquote>
<p>In order to create a secure TLS connection, you can use the <code>tls://</code> URI scheme
like this:</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>connector</span>-><span class="pl-en">connect</span>(<span class="pl-s">'<span class="pl-s">tls://www.google.com:443</span>'</span>)-><span class="pl-en">then</span>(<span class="pl-k">function</span> (<span class="pl-smi"><span class="pl-smi">ConnectionInterface</span></span> <span class="pl-s1"><span class="pl-c1">$</span>connection</span>) {
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">write</span>(<span class="pl-s">'<span class="pl-s">...</span>'</span>);
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">end</span>();
});</pre></div>
<p>In order to create a local Unix domain socket connection, you can use the
<code>unix://</code> URI scheme like this:</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>connector</span>-><span class="pl-en">connect</span>(<span class="pl-s">'<span class="pl-s">unix:///tmp/demo.sock</span>'</span>)-><span class="pl-en">then</span>(<span class="pl-k">function</span> (<span class="pl-smi"><span class="pl-smi">ConnectionInterface</span></span> <span class="pl-s1"><span class="pl-c1">$</span>connection</span>) {
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">write</span>(<span class="pl-s">'<span class="pl-s">...</span>'</span>);
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">end</span>();
});</pre></div>
<p>Under the hood, the <code>Connector</code> is implemented as a <em>higher-level facade</em>
for the lower-level connectors implemented in this package. This means it
also shares all of their features and implementation details.
If you want to typehint in your higher-level protocol implementation, you SHOULD
use the generic <a href="#connectorinterface"><code>ConnectorInterface</code></a> instead.</p>
<p>In particular, the <code>Connector</code> class uses Google's public DNS server <code>8.8.8.8</code>
to resolve all hostnames into underlying IP addresses by default.
This implies that it also ignores your <code>hosts</code> file and <code>resolve.conf</code>, which
means you won't be able to connect to <code>localhost</code> and other non-public
hostnames by default.
If you want to use a custom DNS server (such as a local DNS relay), you can set
up the <code>Connector</code> like this:</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>connector</span> = <span class="pl-k">new</span> <span class="pl-v">Connector</span>(<span class="pl-s1"><span class="pl-c1">$</span>loop</span>, <span class="pl-en">array</span>(
<span class="pl-s">'<span class="pl-s">dns</span>'</span> => <span class="pl-s">'<span class="pl-s">127.0.1.1</span>'</span>
));
<span class="pl-s1"><span class="pl-c1">$</span>connector</span>-><span class="pl-en">connect</span>(<span class="pl-s">'<span class="pl-s">localhost:80</span>'</span>)-><span class="pl-en">then</span>(<span class="pl-k">function</span> (<span class="pl-smi"><span class="pl-smi">ConnectionInterface</span></span> <span class="pl-s1"><span class="pl-c1">$</span>connection</span>) {
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">write</span>(<span class="pl-s">'<span class="pl-s">...</span>'</span>);
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">end</span>();
});</pre></div>
<p>If you do not want to use a DNS resolver at all and want to connect to IP
addresses only, you can also set up your <code>Connector</code> like this:</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>connector</span> = <span class="pl-k">new</span> <span class="pl-v">Connector</span>(<span class="pl-s1"><span class="pl-c1">$</span>loop</span>, <span class="pl-en">array</span>(
<span class="pl-s">'<span class="pl-s">dns</span>'</span> => <span class="pl-c1">false</span>
));
<span class="pl-s1"><span class="pl-c1">$</span>connector</span>-><span class="pl-en">connect</span>(<span class="pl-s">'<span class="pl-s">127.0.0.1:80</span>'</span>)-><span class="pl-en">then</span>(<span class="pl-k">function</span> (<span class="pl-smi"><span class="pl-smi">ConnectionInterface</span></span> <span class="pl-s1"><span class="pl-c1">$</span>connection</span>) {
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">write</span>(<span class="pl-s">'<span class="pl-s">...</span>'</span>);
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">end</span>();
});</pre></div>
<p>Advanced: If you need a custom DNS <code>Resolver</code> instance, you can also set up
your <code>Connector</code> like this:</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>dnsResolverFactory</span> = <span class="pl-k">new</span> <span class="pl-v">React</span>\<span class="pl-v">Dns</span>\<span class="pl-v">Resolver</span>\<span class="pl-v">Factory</span>();
<span class="pl-s1"><span class="pl-c1">$</span>resolver</span> = <span class="pl-s1"><span class="pl-c1">$</span>dnsResolverFactory</span>-><span class="pl-en">createCached</span>(<span class="pl-s">'<span class="pl-s">127.0.1.1</span>'</span>, <span class="pl-s1"><span class="pl-c1">$</span>loop</span>);
<span class="pl-s1"><span class="pl-c1">$</span>connector</span> = <span class="pl-k">new</span> <span class="pl-v">Connector</span>(<span class="pl-s1"><span class="pl-c1">$</span>loop</span>, <span class="pl-en">array</span>(
<span class="pl-s">'<span class="pl-s">dns</span>'</span> => <span class="pl-s1"><span class="pl-c1">$</span>resolver</span>
));
<span class="pl-s1"><span class="pl-c1">$</span>connector</span>-><span class="pl-en">connect</span>(<span class="pl-s">'<span class="pl-s">localhost:80</span>'</span>)-><span class="pl-en">then</span>(<span class="pl-k">function</span> (<span class="pl-smi"><span class="pl-smi">ConnectionInterface</span></span> <span class="pl-s1"><span class="pl-c1">$</span>connection</span>) {
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">write</span>(<span class="pl-s">'<span class="pl-s">...</span>'</span>);
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">end</span>();
});</pre></div>
<p>By default, the <code>tcp://</code> and <code>tls://</code> URI schemes will use timeout value that
repects your <code>default_socket_timeout</code> ini setting (which defaults to 60s).
If you want a custom timeout value, you can simply pass this like this:</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>connector</span> = <span class="pl-k">new</span> <span class="pl-v">Connector</span>(<span class="pl-s1"><span class="pl-c1">$</span>loop</span>, <span class="pl-en">array</span>(
<span class="pl-s">'<span class="pl-s">timeout</span>'</span> => <span class="pl-c1">10.0</span>
));</pre></div>
<p>Similarly, if you do not want to apply a timeout at all and let the operating
system handle this, you can pass a boolean flag like this:</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>connector</span> = <span class="pl-k">new</span> <span class="pl-v">Connector</span>(<span class="pl-s1"><span class="pl-c1">$</span>loop</span>, <span class="pl-en">array</span>(
<span class="pl-s">'<span class="pl-s">timeout</span>'</span> => <span class="pl-c1">false</span>
));</pre></div>
<p>By default, the <code>Connector</code> supports the <code>tcp://</code>, <code>tls://</code> and <code>unix://</code>
URI schemes. If you want to explicitly prohibit any of these, you can simply
pass boolean flags like this:</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-c">// only allow secure TLS connections</span>
<span class="pl-s1"><span class="pl-c1">$</span>connector</span> = <span class="pl-k">new</span> <span class="pl-v">Connector</span>(<span class="pl-s1"><span class="pl-c1">$</span>loop</span>, <span class="pl-en">array</span>(
<span class="pl-s">'<span class="pl-s">tcp</span>'</span> => <span class="pl-c1">false</span>,
<span class="pl-s">'<span class="pl-s">tls</span>'</span> => <span class="pl-c1">true</span>,
<span class="pl-s">'<span class="pl-s">unix</span>'</span> => <span class="pl-c1">false</span>,
));
<span class="pl-s1"><span class="pl-c1">$</span>connector</span>-><span class="pl-en">connect</span>(<span class="pl-s">'<span class="pl-s">tls://google.com:443</span>'</span>)-><span class="pl-en">then</span>(<span class="pl-k">function</span> (<span class="pl-smi"><span class="pl-smi">ConnectionInterface</span></span> <span class="pl-s1"><span class="pl-c1">$</span>connection</span>) {
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">write</span>(<span class="pl-s">'<span class="pl-s">...</span>'</span>);
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">end</span>();
});</pre></div>
<p>The <code>tcp://</code> and <code>tls://</code> also accept additional context options passed to
the underlying connectors.
If you want to explicitly pass additional context options, you can simply
pass arrays of context options like this:</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-c">// allow insecure TLS connections</span>
<span class="pl-s1"><span class="pl-c1">$</span>connector</span> = <span class="pl-k">new</span> <span class="pl-v">Connector</span>(<span class="pl-s1"><span class="pl-c1">$</span>loop</span>, <span class="pl-en">array</span>(
<span class="pl-s">'<span class="pl-s">tcp</span>'</span> => <span class="pl-en">array</span>(
<span class="pl-s">'<span class="pl-s">bindto</span>'</span> => <span class="pl-s">'<span class="pl-s">192.168.0.1:0</span>'</span>
),
<span class="pl-s">'<span class="pl-s">tls</span>'</span> => <span class="pl-en">array</span>(
<span class="pl-s">'<span class="pl-s">verify_peer</span>'</span> => <span class="pl-c1">false</span>,
<span class="pl-s">'<span class="pl-s">verify_peer_name</span>'</span> => <span class="pl-c1">false</span>
),
));
<span class="pl-s1"><span class="pl-c1">$</span>connector</span>-><span class="pl-en">connect</span>(<span class="pl-s">'<span class="pl-s">tls://localhost:443</span>'</span>)-><span class="pl-en">then</span>(<span class="pl-k">function</span> (<span class="pl-smi"><span class="pl-smi">ConnectionInterface</span></span> <span class="pl-s1"><span class="pl-c1">$</span>connection</span>) {
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">write</span>(<span class="pl-s">'<span class="pl-s">...</span>'</span>);
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">end</span>();
});</pre></div>
<blockquote>
<p>For more details about context options, please refer to the PHP documentation
about <a href="http://php.net/manual/en/context.socket.php" rel="nofollow">socket context options</a>
and <a href="http://php.net/manual/en/context.ssl.php" rel="nofollow">SSL context options</a>.</p>
</blockquote>
<p>Advanced: By default, the <code>Connector</code> supports the <code>tcp://</code>, <code>tls://</code> and
<code>unix://</code> URI schemes.
For this, it sets up the required connector classes automatically.
If you want to explicitly pass custom connectors for any of these, you can simply
pass an instance implementing the <code>ConnectorInterface</code> like this:</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>dnsResolverFactory</span> = <span class="pl-k">new</span> <span class="pl-v">React</span>\<span class="pl-v">Dns</span>\<span class="pl-v">Resolver</span>\<span class="pl-v">Factory</span>();
<span class="pl-s1"><span class="pl-c1">$</span>resolver</span> = <span class="pl-s1"><span class="pl-c1">$</span>dnsResolverFactory</span>-><span class="pl-en">createCached</span>(<span class="pl-s">'<span class="pl-s">127.0.1.1</span>'</span>, <span class="pl-s1"><span class="pl-c1">$</span>loop</span>);
<span class="pl-s1"><span class="pl-c1">$</span>tcp</span> = <span class="pl-k">new</span> <span class="pl-v">DnsConnector</span>(<span class="pl-k">new</span> <span class="pl-v">TcpConnector</span>(<span class="pl-s1"><span class="pl-c1">$</span>loop</span>), <span class="pl-s1"><span class="pl-c1">$</span>resolver</span>);
<span class="pl-s1"><span class="pl-c1">$</span>tls</span> = <span class="pl-k">new</span> <span class="pl-v">SecureConnector</span>(<span class="pl-s1"><span class="pl-c1">$</span>tcp</span>, <span class="pl-s1"><span class="pl-c1">$</span>loop</span>);
<span class="pl-s1"><span class="pl-c1">$</span>unix</span> = <span class="pl-k">new</span> <span class="pl-v">UnixConnector</span>(<span class="pl-s1"><span class="pl-c1">$</span>loop</span>);
<span class="pl-s1"><span class="pl-c1">$</span>connector</span> = <span class="pl-k">new</span> <span class="pl-v">Connector</span>(<span class="pl-s1"><span class="pl-c1">$</span>loop</span>, <span class="pl-en">array</span>(
<span class="pl-s">'<span class="pl-s">tcp</span>'</span> => <span class="pl-s1"><span class="pl-c1">$</span>tcp</span>,
<span class="pl-s">'<span class="pl-s">tls</span>'</span> => <span class="pl-s1"><span class="pl-c1">$</span>tls</span>,
<span class="pl-s">'<span class="pl-s">unix</span>'</span> => <span class="pl-s1"><span class="pl-c1">$</span>unix</span>,
<span class="pl-s">'<span class="pl-s">dns</span>'</span> => <span class="pl-c1">false</span>,
<span class="pl-s">'<span class="pl-s">timeout</span>'</span> => <span class="pl-c1">false</span>,
));
<span class="pl-s1"><span class="pl-c1">$</span>connector</span>-><span class="pl-en">connect</span>(<span class="pl-s">'<span class="pl-s">google.com:80</span>'</span>)-><span class="pl-en">then</span>(<span class="pl-k">function</span> (<span class="pl-smi"><span class="pl-smi">ConnectionInterface</span></span> <span class="pl-s1"><span class="pl-c1">$</span>connection</span>) {
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">write</span>(<span class="pl-s">'<span class="pl-s">...</span>'</span>);
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">end</span>();
});</pre></div>
<blockquote>
<p>Internally, the <code>tcp://</code> connector will always be wrapped by the DNS resolver,
unless you disable DNS like in the above example. In this case, the <code>tcp://</code>
connector receives the actual hostname instead of only the resolved IP address
and is thus responsible for performing the lookup.
Internally, the automatically created <code>tls://</code> connector will always wrap the
underlying <code>tcp://</code> connector for establishing the underlying plaintext
TCP/IP connection before enabling secure TLS mode. If you want to use a custom
underlying <code>tcp://</code> connector for secure TLS connections only, you may
explicitly pass a <code>tls://</code> connector like above instead.
Internally, the <code>tcp://</code> and <code>tls://</code> connectors will always be wrapped by
<code>TimeoutConnector</code>, unless you disable timeouts like in the above example.</p>
</blockquote>
<div class="markdown-heading"><h2 class="heading-element">Advanced Usage</h2><a id="advanced-usage" class="anchor" aria-label="Permalink: Advanced Usage" href="#advanced-usage"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<div class="markdown-heading"><h3 class="heading-element">TcpConnector</h3><a id="tcpconnector" class="anchor" aria-label="Permalink: TcpConnector" href="#tcpconnector"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>The <code>React\SocketClient\TcpConnector</code> class implements the
<a href="#connectorinterface"><code>ConnectorInterface</code></a> and allows you to create plaintext
TCP/IP connections to any IP-port-combination:</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>tcpConnector</span> = <span class="pl-k">new</span> <span class="pl-v">React</span>\<span class="pl-v">SocketClient</span>\<span class="pl-v">TcpConnector</span>(<span class="pl-s1"><span class="pl-c1">$</span>loop</span>);
<span class="pl-s1"><span class="pl-c1">$</span>tcpConnector</span>-><span class="pl-en">connect</span>(<span class="pl-s">'<span class="pl-s">127.0.0.1:80</span>'</span>)-><span class="pl-en">then</span>(<span class="pl-k">function</span> (<span class="pl-smi"><span class="pl-smi">ConnectionInterface</span></span> <span class="pl-s1"><span class="pl-c1">$</span>connection</span>) {
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">write</span>(<span class="pl-s">'<span class="pl-s">...</span>'</span>);
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">end</span>();
});
<span class="pl-s1"><span class="pl-c1">$</span>loop</span>-><span class="pl-en">run</span>();</pre></div>
<p>See also the <a href="https://github.com/reactphp-legacy/socket-client/blob/v0.7.0/examples">first example</a>.</p>
<p>Pending connection attempts can be cancelled by cancelling its pending promise like so:</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>promise</span> = <span class="pl-s1"><span class="pl-c1">$</span>tcpConnector</span>-><span class="pl-en">connect</span>(<span class="pl-s">'<span class="pl-s">127.0.0.1:80</span>'</span>);
<span class="pl-s1"><span class="pl-c1">$</span>promise</span>-><span class="pl-en">cancel</span>();</pre></div>
<p>Calling <code>cancel()</code> on a pending promise will close the underlying socket
resource, thus cancelling the pending TCP/IP connection, and reject the
resulting promise.</p>
<p>You can optionally pass additional
<a href="http://php.net/manual/en/context.socket.php" rel="nofollow">socket context options</a>
to the constructor like this:</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>tcpConnector</span> = <span class="pl-k">new</span> <span class="pl-v">React</span>\<span class="pl-v">SocketClient</span>\<span class="pl-v">TcpConnector</span>(<span class="pl-s1"><span class="pl-c1">$</span>loop</span>, <span class="pl-en">array</span>(
<span class="pl-s">'<span class="pl-s">bindto</span>'</span> => <span class="pl-s">'<span class="pl-s">192.168.0.1:0</span>'</span>
));</pre></div>
<p>Note that this class only allows you to connect to IP-port-combinations.
If the given URI is invalid, does not contain a valid IP address and port
or contains any other scheme, it will reject with an
<code>InvalidArgumentException</code>:</p>
<p>If the given URI appears to be valid, but connecting to it fails (such as if
the remote host rejects the connection etc.), it will reject with a
<code>RuntimeException</code>.</p>
<p>If you want to connect to hostname-port-combinations, see also the following chapter.</p>
<blockquote>
<p>Advanced usage: Internally, the <code>TcpConnector</code> allocates an empty <em>context</em>
resource for each stream resource.
If the destination URI contains a <code>hostname</code> query parameter, its value will
be used to set up the TLS peer name.
This is used by the <code>SecureConnector</code> and <code>DnsConnector</code> to verify the peer
name and can also be used if you want a custom TLS peer name.</p>
</blockquote>
<div class="markdown-heading"><h3 class="heading-element">DnsConnector</h3><a id="dnsconnector" class="anchor" aria-label="Permalink: DnsConnector" href="#dnsconnector"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>The <code>DnsConnector</code> class implements the
<a href="#connectorinterface"><code>ConnectorInterface</code></a> and allows you to create plaintext
TCP/IP connections to any hostname-port-combination.</p>
<p>It does so by decorating a given <code>TcpConnector</code> instance so that it first
looks up the given domain name via DNS (if applicable) and then establishes the
underlying TCP/IP connection to the resolved target IP address.</p>
<p>Make sure to set up your DNS resolver and underlying TCP connector like this:</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>dnsResolverFactory</span> = <span class="pl-k">new</span> <span class="pl-v">React</span>\<span class="pl-v">Dns</span>\<span class="pl-v">Resolver</span>\<span class="pl-v">Factory</span>();
<span class="pl-s1"><span class="pl-c1">$</span>dns</span> = <span class="pl-s1"><span class="pl-c1">$</span>dnsResolverFactory</span>-><span class="pl-en">createCached</span>(<span class="pl-s">'<span class="pl-s">8.8.8.8</span>'</span>, <span class="pl-s1"><span class="pl-c1">$</span>loop</span>);
<span class="pl-s1"><span class="pl-c1">$</span>dnsConnector</span> = <span class="pl-k">new</span> <span class="pl-v">React</span>\<span class="pl-v">SocketClient</span>\<span class="pl-v">DnsConnector</span>(<span class="pl-s1"><span class="pl-c1">$</span>tcpConnector</span>, <span class="pl-s1"><span class="pl-c1">$</span>dns</span>);
<span class="pl-s1"><span class="pl-c1">$</span>dnsConnector</span>-><span class="pl-en">connect</span>(<span class="pl-s">'<span class="pl-s">www.google.com:80</span>'</span>)-><span class="pl-en">then</span>(<span class="pl-k">function</span> (<span class="pl-smi"><span class="pl-smi">ConnectionInterface</span></span> <span class="pl-s1"><span class="pl-c1">$</span>connection</span>) {
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">write</span>(<span class="pl-s">'<span class="pl-s">...</span>'</span>);
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">end</span>();
});
<span class="pl-s1"><span class="pl-c1">$</span>loop</span>-><span class="pl-en">run</span>();</pre></div>
<p>See also the <a href="https://github.com/reactphp-legacy/socket-client/blob/v0.7.0/examples">first example</a>.</p>
<p>Pending connection attempts can be cancelled by cancelling its pending promise like so:</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>promise</span> = <span class="pl-s1"><span class="pl-c1">$</span>dnsConnector</span>-><span class="pl-en">connect</span>(<span class="pl-s">'<span class="pl-s">www.google.com:80</span>'</span>);
<span class="pl-s1"><span class="pl-c1">$</span>promise</span>-><span class="pl-en">cancel</span>();</pre></div>
<p>Calling <code>cancel()</code> on a pending promise will cancel the underlying DNS lookup
and/or the underlying TCP/IP connection and reject the resulting promise.</p>
<blockquote>
<p>Advanced usage: Internally, the <code>DnsConnector</code> relies on a <code>Resolver</code> to
look up the IP address for the given hostname.
It will then replace the hostname in the destination URI with this IP and
append a <code>hostname</code> query parameter and pass this updated URI to the underlying
connector.
The underlying connector is thus responsible for creating a connection to the
target IP address, while this query parameter can be used to check the original
hostname and is used by the <code>TcpConnector</code> to set up the TLS peer name.
If a <code>hostname</code> is given explicitly, this query parameter will not be modified,
which can be useful if you want a custom TLS peer name.</p>
</blockquote>
<div class="markdown-heading"><h3 class="heading-element">SecureConnector</h3><a id="secureconnector" class="anchor" aria-label="Permalink: SecureConnector" href="#secureconnector"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>The <code>SecureConnector</code> class implements the
<a href="#connectorinterface"><code>ConnectorInterface</code></a> and allows you to create secure
TLS (formerly known as SSL) connections to any hostname-port-combination.</p>
<p>It does so by decorating a given <code>DnsConnector</code> instance so that it first
creates a plaintext TCP/IP connection and then enables TLS encryption on this
stream.</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>secureConnector</span> = <span class="pl-k">new</span> <span class="pl-v">React</span>\<span class="pl-v">SocketClient</span>\<span class="pl-v">SecureConnector</span>(<span class="pl-s1"><span class="pl-c1">$</span>dnsConnector</span>, <span class="pl-s1"><span class="pl-c1">$</span>loop</span>);
<span class="pl-s1"><span class="pl-c1">$</span>secureConnector</span>-><span class="pl-en">connect</span>(<span class="pl-s">'<span class="pl-s">www.google.com:443</span>'</span>)-><span class="pl-en">then</span>(<span class="pl-k">function</span> (<span class="pl-smi"><span class="pl-smi">ConnectionInterface</span></span> <span class="pl-s1"><span class="pl-c1">$</span>connection</span>) {
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">write</span>(<span class="pl-s">"<span class="pl-s">GET / HTTP/1.0</span>\r\n<span class="pl-s">Host: www.google.com</span>\r\n\r\n"</span>);
<span class="pl-c1">.</span>.<span class="pl-c1">.</span>
});
<span class="pl-s1"><span class="pl-c1">$</span>loop</span>-><span class="pl-en">run</span>();</pre></div>
<p>See also the <a href="https://github.com/reactphp-legacy/socket-client/blob/v0.7.0/examples">second example</a>.</p>
<p>Pending connection attempts can be cancelled by cancelling its pending promise like so:</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>promise</span> = <span class="pl-s1"><span class="pl-c1">$</span>secureConnector</span>-><span class="pl-en">connect</span>(<span class="pl-s">'<span class="pl-s">www.google.com:443</span>'</span>);
<span class="pl-s1"><span class="pl-c1">$</span>promise</span>-><span class="pl-en">cancel</span>();</pre></div>
<p>Calling <code>cancel()</code> on a pending promise will cancel the underlying TCP/IP
connection and/or the SSL/TLS negonation and reject the resulting promise.</p>
<p>You can optionally pass additional
<a href="http://php.net/manual/en/context.ssl.php" rel="nofollow">SSL context options</a>
to the constructor like this:</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>secureConnector</span> = <span class="pl-k">new</span> <span class="pl-v">React</span>\<span class="pl-v">SocketClient</span>\<span class="pl-v">SecureConnector</span>(<span class="pl-s1"><span class="pl-c1">$</span>dnsConnector</span>, <span class="pl-s1"><span class="pl-c1">$</span>loop</span>, <span class="pl-en">array</span>(
<span class="pl-s">'<span class="pl-s">verify_peer</span>'</span> => <span class="pl-c1">false</span>,
<span class="pl-s">'<span class="pl-s">verify_peer_name</span>'</span> => <span class="pl-c1">false</span>
));</pre></div>
<blockquote>
<p>Advanced usage: Internally, the <code>SecureConnector</code> relies on setting up the
required <em>context options</em> on the underlying stream resource.
It should therefor be used with a <code>TcpConnector</code> somewhere in the connector
stack so that it can allocate an empty <em>context</em> resource for each stream
resource and verify the peer name.
Failing to do so may result in a TLS peer name mismatch error or some hard to
trace race conditions, because all stream resources will use a single, shared
<em>default context</em> resource otherwise.</p>
</blockquote>
<div class="markdown-heading"><h3 class="heading-element">TimeoutConnector</h3><a id="timeoutconnector" class="anchor" aria-label="Permalink: TimeoutConnector" href="#timeoutconnector"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>The <code>TimeoutConnector</code> class implements the
<a href="#connectorinterface"><code>ConnectorInterface</code></a> and allows you to add timeout
handling to any existing connector instance.</p>
<p>It does so by decorating any given <a href="#connectorinterface"><code>ConnectorInterface</code></a>
instance and starting a timer that will automatically reject and abort any
underlying connection attempt if it takes too long.</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>timeoutConnector</span> = <span class="pl-k">new</span> <span class="pl-v">React</span>\<span class="pl-v">SocketClient</span>\<span class="pl-v">TimeoutConnector</span>(<span class="pl-s1"><span class="pl-c1">$</span>connector</span>, <span class="pl-c1">3.0</span>, <span class="pl-s1"><span class="pl-c1">$</span>loop</span>);
<span class="pl-s1"><span class="pl-c1">$</span>timeoutConnector</span>-><span class="pl-en">connect</span>(<span class="pl-s">'<span class="pl-s">google.com:80</span>'</span>)-><span class="pl-en">then</span>(<span class="pl-k">function</span> (<span class="pl-smi"><span class="pl-smi">ConnectionInterface</span></span> <span class="pl-s1"><span class="pl-c1">$</span>connection</span>) {
<span class="pl-c">// connection succeeded within 3.0 seconds</span>
});</pre></div>
<p>See also any of the <a href="https://github.com/reactphp-legacy/socket-client/blob/v0.7.0/examples">examples</a>.</p>
<p>Pending connection attempts can be cancelled by cancelling its pending promise like so:</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>promise</span> = <span class="pl-s1"><span class="pl-c1">$</span>timeoutConnector</span>-><span class="pl-en">connect</span>(<span class="pl-s">'<span class="pl-s">google.com:80</span>'</span>);
<span class="pl-s1"><span class="pl-c1">$</span>promise</span>-><span class="pl-en">cancel</span>();</pre></div>
<p>Calling <code>cancel()</code> on a pending promise will cancel the underlying connection
attempt, abort the timer and reject the resulting promise.</p>
<div class="markdown-heading"><h3 class="heading-element">UnixConnector</h3><a id="unixconnector" class="anchor" aria-label="Permalink: UnixConnector" href="#unixconnector"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>The <code>UnixConnector</code> class implements the
<a href="#connectorinterface"><code>ConnectorInterface</code></a> and allows you to connect to
Unix domain socket (UDS) paths like this:</p>
<div class="highlight highlight-text-html-php"><pre><span class="pl-s1"><span class="pl-c1">$</span>connector</span> = <span class="pl-k">new</span> <span class="pl-v">React</span>\<span class="pl-v">SocketClient</span>\<span class="pl-v">UnixConnector</span>(<span class="pl-s1"><span class="pl-c1">$</span>loop</span>);
<span class="pl-s1"><span class="pl-c1">$</span>connector</span>-><span class="pl-en">connect</span>(<span class="pl-s">'<span class="pl-s">/tmp/demo.sock</span>'</span>)-><span class="pl-en">then</span>(<span class="pl-k">function</span> (<span class="pl-smi"><span class="pl-smi">ConnectionInterface</span></span> <span class="pl-s1"><span class="pl-c1">$</span>connection</span>) {
<span class="pl-s1"><span class="pl-c1">$</span>connection</span>-><span class="pl-en">write</span>(<span class="pl-s">"<span class="pl-s">HELLO</span>\n"</span>);
});
<span class="pl-s1"><span class="pl-c1">$</span>loop</span>-><span class="pl-en">run</span>();</pre></div>
<p>Connecting to Unix domain sockets is an atomic operation, i.e. its promise will
settle (either resolve or reject) immediately.
As such, calling <code>cancel()</code> on the resulting promise has no effect.</p>
<div class="markdown-heading"><h2 class="heading-element">Install</h2><a id="install" class="anchor" aria-label="Permalink: Install" href="#install"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>The recommended way to install this library is <a href="http://getcomposer.org" rel="nofollow">through Composer</a>.
<a href="http://getcomposer.org/doc/00-intro.md" rel="nofollow">New to Composer?</a></p>
<p>This will install the latest supported version:</p>
<div class="highlight highlight-source-shell"><pre>$ composer require react/socket-client:^0.7</pre></div>
<p>More details about version upgrades can be found in the <a href="changelog.html">CHANGELOG</a>.</p>
<p>This project supports running on legacy PHP 5.3 through current PHP 7+ and HHVM.
It's <em>highly recommended to use PHP 7+</em> for this project, partly due to its vast
performance improvements and partly because legacy PHP versions require several
workarounds as described below.</p>
<p>Secure TLS connections received some major upgrades starting with PHP 5.6, with
the defaults now being more secure, while older versions required explicit
context options.
This library does not take responsibility over these context options, so it's
up to consumers of this library to take care of setting appropriate context
options as described above.</p>
<p>All versions of PHP prior to 5.6.8 suffered from a buffering issue where reading
from a streaming TLS connection could be one <code>data</code> event behind.
This library implements a work-around to try to flush the complete incoming
data buffers on these versions, but we have seen reports of people saying this
could still affect some older versions (<code>5.5.23</code>, <code>5.6.7</code>, and <code>5.6.8</code>).
Note that this only affects <em>some</em> higher-level streaming protocols, such as
IRC over TLS, but should not affect HTTP over TLS (HTTPS).
Further investigation of this issue is needed.
For more insights, this issue is also covered by our test suite.</p>
<p>This project also supports running on HHVM.
Note that really old HHVM < 3.8 does not support secure TLS connections, as it
lacks the required <code>stream_socket_enable_crypto()</code> function.
As such, trying to create a secure TLS connections on affected versions will
return a rejected promise instead.
This issue is also covered by our test suite, which will skip related tests
on affected versions.</p>
<div class="markdown-heading"><h2 class="heading-element">Tests</h2><a id="tests" class="anchor" aria-label="Permalink: Tests" href="#tests"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>To run the test suite, you first need to clone this repo and then install all
dependencies <a href="http://getcomposer.org" rel="nofollow">through Composer</a>:</p>
<div class="highlight highlight-source-shell"><pre>$ composer install</pre></div>
<p>To run the test suite, go to the project root and run:</p>
<div class="highlight highlight-source-shell"><pre>$ php vendor/bin/phpunit</pre></div>
<div class="markdown-heading"><h2 class="heading-element">License</h2><a id="license" class="anchor" aria-label="Permalink: License" href="#license"><span aria-hidden="true" class="octicon octicon-link"></span></a></div>
<p>MIT, see <a href="license.html">LICENSE file</a>.</p>
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