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|
<?php
namespace JsonRPC;
use BadFunctionCallException;
/**
* JsonRPC client class
*
* @package JsonRPC
* @author Frederic Guillot
* @license Unlicense http://unlicense.org/
*/
class Client
{
/**
* URL of the server
*
* @access private
* @var string
*/
private $url;
/**
* HTTP client timeout
*
* @access private
* @var integer
*/
private $timeout;
/**
* Username for authentication
*
* @access private
* @var string
*/
private $username;
/**
* Password for authentication
*
* @access private
* @var string
*/
private $password;
/**
* Enable debug output to the php error log
*
* @access public
* @var boolean
*/
public $debug = false;
/**
* Default HTTP headers to send to the server
*
* @access private
* @var array
*/
private $headers = array(
'Connection: close',
'Content-Type: application/json',
'Accept: application/json'
);
/**
* Constructor
*
* @access public
* @param string $url Server URL
* @param integer $timeout Server URL
* @param array $headers Custom HTTP headers
*/
public function __construct($url, $timeout = 5, $headers = array())
{
$this->url = $url;
$this->timeout = $timeout;
$this->headers = array_merge($this->headers, $headers);
}
/**
* Automatic mapping of procedures
*
* @access public
* @param string $method Procedure name
* @param array $params Procedure arguments
* @return mixed
*/
public function __call($method, array $params)
{
// Allow to pass an array and use named arguments
if (count($params) === 1 && is_array($params[0])) {
$params = $params[0];
}
return $this->execute($method, $params);
}
/**
* Set authentication parameters
*
* @access public
* @param string $username Username
* @param string $password Password
*/
public function authentication($username, $password)
{
$this->username = $username;
$this->password = $password;
}
/**
* Execute
*
* @access public
* @throws BadFunctionCallException Exception thrown when a bad request is made (missing argument/procedure)
* @param string $procedure Procedure name
* @param array $params Procedure arguments
* @return mixed
*/
public function execute($procedure, array $params = array())
{
$id = mt_rand();
$payload = array(
'jsonrpc' => '2.0',
'method' => $procedure,
'id' => $id
);
if (! empty($params)) {
$payload['params'] = $params;
}
$result = $this->doRequest($payload);
if (isset($result['id']) && $result['id'] == $id && array_key_exists('result', $result)) {
return $result['result'];
}
throw new BadFunctionCallException('Bad Request');
}
/**
* Do the HTTP request
*
* @access public
* @param string $payload Data to send
*/
public function doRequest($payload)
{
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $this->url);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $this->timeout);
curl_setopt($ch, CURLOPT_USERAGENT, 'JSON-RPC PHP Client');
curl_setopt($ch, CURLOPT_HTTPHEADER, $this->headers);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, false);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');
curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($payload));
if ($this->username && $this->password) {
curl_setopt($ch, CURLOPT_USERPWD, $this->username.':'.$this->password);
}
$result = curl_exec($ch);
$response = json_decode($result, true);
if ($this->debug) {
error_log('==> Request: '.PHP_EOL.json_encode($payload, JSON_PRETTY_PRINT));
error_log('==> Response: '.PHP_EOL.json_encode($response, JSON_PRETTY_PRINT));
}
curl_close($ch);
return is_array($response) ? $response : array();
}
}
|
