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|
<?php
namespace iplx\Http;
use RuntimeException;
use Psr\Http\Message\RequestInterface;
use Psr\Http\Message\ResponseInterface;
/**
* HTTP client that uses cURL
*/
class Client implements ClientInterface
{
/**
* Client version
*
* @var string
*/
const VERSION = '1.0.0';
/**
* Maximum number of internal cURL handles
*
* @var int
*/
const MAX_HANDLES = 4;
/**
* Internal cURL handles
*
* @var array
*/
protected $handles = [];
/**
* Return user agent
*
* @return string
*/
protected function getAgent()
{
$defaultAgent = 'ipl/' . self::VERSION;
$defaultAgent .= ' curl/' . curl_version()['version'];
$defaultAgent .= ' PHP/' . PHP_VERSION;
return $defaultAgent;
}
/**
* Create and return a cURL handle based on the given request
*
* @param RequestInterface $request
* @param array $options
*
* @return Handle
*
* @throws RuntimeException
*/
protected function createHandle(RequestInterface $request, array $options)
{
$headers = [];
foreach ($request->getHeaders() as $name => $values) {
$headers[] = $name . ': ' . implode(', ', $values);
}
$curlOptions = [
CURLOPT_FOLLOWLOCATION => true,
CURLOPT_FAILONERROR => true,
CURLOPT_USERAGENT => $this->getAgent()
];
if (isset($options['curl'])) {
$curlOptions += $options['curl'];
}
$curlOptions += [
CURLOPT_CUSTOMREQUEST => $request->getMethod(),
CURLOPT_HTTPHEADER => $headers,
CURLOPT_RETURNTRANSFER => false,
CURLOPT_URL => (string) $request->getUri()->withFragment('')
];
if (! $request->hasHeader('Accept')) {
$curlOptions[CURLOPT_HTTPHEADER][] = 'Accept:';
}
if (! $request->hasHeader('Content-Type')) {
$curlOptions[CURLOPT_HTTPHEADER][] = 'Content-Type:';
}
if (! $request->hasHeader('Expect')) {
$curlOptions[CURLOPT_HTTPHEADER][] = 'Expect:';
}
if ($request->getBody()->getSize() !== 0) {
$curlOptions[CURLOPT_UPLOAD] = true;
$body = $request->getBody();
if ($body->isSeekable()) {
$body->seek(0);
}
$curlOptions[CURLOPT_READFUNCTION] = function ($ch, $infile, $length) use ($body) {
return $body->read($length);
};
}
if ($request->getProtocolVersion()) {
$protocolVersion = null;
switch ($request->getProtocolVersion()) {
case '2.0':
if (version_compare(phpversion(), '7.0.7', '<')) {
throw new RuntimeException('You need at least PHP 7.0.7 to use HTTP 2.0');
}
$protocolVersion = CURL_HTTP_VERSION_2;
break;
case '1.1':
$protocolVersion = CURL_HTTP_VERSION_1_1;
break;
default:
$protocolVersion = CURL_HTTP_VERSION_1_0;
}
$curlOptions[CURLOPT_HTTP_VERSION] = $protocolVersion;
}
$handle = new Handle();
$curlOptions[CURLOPT_HEADERFUNCTION] = function($ch, $header) use ($handle) {
$size = strlen($header);
if (! trim($header) || strpos($header, 'HTTP/') === 0) {
return $size;
}
list($key, $value) = explode(': ', $header, 2);
$handle->responseHeaders[$key] = rtrim($value, "\r\n");
return $size;
};
$handle->responseBody = Stream::open();
$curlOptions[CURLOPT_WRITEFUNCTION] = function ($ch, $string) use ($handle) {
return $handle->responseBody->write($string);
};
$ch = ! empty($this->handles) ? array_pop($this->handles) : curl_init();
curl_setopt_array($ch, $curlOptions);
$handle->handle = $ch;
return $handle;
}
/**
* Execute a cURL handle and return the response
*
* @param Handle $handle
*
* @return ResponseInterface
*
* @throws RuntimeException
*/
protected function executeHandle(Handle $handle)
{
$ch = $handle->handle;
$success = curl_exec($ch);
if ($success === false) {
throw new RuntimeException(curl_error($ch));
}
$response = new Response(
curl_getinfo($ch, CURLINFO_HTTP_CODE), $handle->responseHeaders, $handle->responseBody
);
if (count($this->handles) >= self::MAX_HANDLES) {
curl_close($ch);
} else {
curl_reset($ch);
$this->handles[] = $ch;
}
return $response;
}
public function send(RequestInterface $request, array $options = [])
{
$handle = $this->createHandle($request, $options);
$response = $this->executeHandle($handle);
return $response;
}
}
|
