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<?php
/**
* HTTP Client library
*
* PHP version 5.2
*
* @author Matt Bernier <dx@sendgrid.com>
* @author Elmer Thomas <dx@sendgrid.com>
* @copyright 2016 SendGrid
* @license https://opensource.org/licenses/MIT The MIT License
* @version GIT: <git_id>
* @link http://packagist.org/packages/sendgrid/php-http-client
*/
namespace SendGrid;
/**
* Holds the response from an API call.
*/
class Response
{
/**
* Setup the response data
*
* @param int $status_code the status code.
* @param array $response_body the response body as an array.
* @param array $response_headers an array of response headers.
*/
function __construct($status_code = null, $response_body = null, $response_headers = null)
{
$this->_status_code = $status_code;
$this->_response_body = $response_body;
$this->_response_headers = $response_headers;
}
/**
* The status code
*
* @return integer
*/
public function statusCode()
{
return $this->_status_code;
}
/**
* The response body
*
* @return array
*/
public function responseBody()
{
return $this->_response_body;
}
/**
* The response headers
*
* @return array
*/
public function responseHeaders()
{
return $this->_response_headers;
}
}
/**
* Quickly and easily access any REST or REST-like API.
*/
class Client
{
public
$host,
$request_headers,
$version,
$url_path,
$methods;
/**
* Initialize the client
*
* @param string $host the base url (e.g. https://api.sendgrid.com)
* @param array $request_headers global request headers
* @param string $version api version (configurable)
* @param array $url_path holds the segments of the url path
*/
function __construct($host, $request_headers = null, $version = null, $url_path = null)
{
$this->host = $host;
$this->request_headers = ($request_headers ? $request_headers : []);
$this->version = $version;
$this->url_path = ($url_path ? $url_path : []);
// These are the supported HTTP verbs
$this->methods = ['delete', 'get', 'patch', 'post', 'put'];
}
/**
* Make a new Client object
*
* @param string $name name of the url segment
*
* @return Client object
*/
private function _buildClient($name = null)
{
if(isset($name)) {
array_push($this->url_path, $name);
}
$url_path = $this->url_path;
$this->url_path = [];
return new Client($this->host, $this->request_headers, $this->version, $url_path);
}
/**
* Subclass this function for your own needs.
* Or just pass the version as part of the URL
* (e.g. client._('/v3'))
*
* @param string $url URI portion of the full URL being requested
*
* @return string
*/
private function _buildVersionedUrl($url)
{
return sprintf("%s%s%s", $this->host, $this->version, $url);
}
/**
* Build the final URL to be passed
*
* @param array $query_params an array of all the query parameters
*
* @return string
*/
private function _buildUrl($query_params = null)
{
$url = '/'.implode('/', $this->url_path);
if (isset($query_params)) {
$url_values = http_build_query($query_params);
$url = sprintf('%s?%s', $url, $url_values);
}
if (isset($this->version)) {
$url = $this->_buildVersionedUrl($url);
} else {
$url = sprintf('%s%s', $this->host, $url);;
}
return $url;
}
/**
* Make the API call and return the response. This is separated into
* it's own function, so we can mock it easily for testing.
*
* @param array $method the HTTP verb
* @param string $url the final url to call
* @param array $request_body request body
* @param array $request_headers any additional request headers
*
* @return Response object
*/
public function makeRequest($method, $url, $request_body = null, $request_headers = null)
{
$curl = curl_init($url);
curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl, CURLOPT_HEADER, 1);
curl_setopt($curl, CURLOPT_CUSTOMREQUEST, strtoupper($method));
curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, false);
if(isset($request_body)) {
$request_body = json_encode($request_body);
curl_setopt($curl, CURLOPT_POSTFIELDS, $request_body);
$content_length = array('Content-Length: ' . strlen($request_body));
}
if(isset($request_headers)) {
$this->request_headers = array_merge($this->request_headers, $request_headers);
}
curl_setopt($curl, CURLOPT_HTTPHEADER, $this->request_headers);
$curl_response = curl_exec($curl);
$header_size = curl_getinfo($curl, CURLINFO_HEADER_SIZE);
$status_code = curl_getinfo($curl, CURLINFO_HTTP_CODE);
$response_body = substr($curl_response, $header_size);
$response_header = substr($curl_response, 0, $header_size);
curl_close($curl);
return new Response($status_code, $response_body, $response_header);
}
/**
* Add variable values to the url.
* (e.g. /your/api/{variable_value}/call)
* Another example: if you have a PHP reserved word, such as and,
* in your url, you must use this method.
*
* @param string $name name of the url segment
*
* @return Client object
*/
public function _($name = null)
{
return $this->_buildClient($name);
}
/**
* Dynamically add method calls to the url, then call a method.
* (e.g. client.name.name.method())
*
* @param string $name name of the dynamic method call or HTTP verb
* @param array $args parameters passed with the method call
*
* @return Client or Response object
*/
public function __call($name, $args)
{
if($name == 'version') {
$this->version = $args[0];
return $this->_();
}
if (in_array($name, $this->methods)) {
$query_params = ((count($args) >= 2) ? $args[1] : null);
$url = $this->_buildUrl($query_params);
$request_body = ($args ? $args[0] : null);
$request_headers = ((count($args) == 3) ? $args[2] : null);
return $this->makeRequest($name, $url, $request_body, $request_headers);
}
return $this->_($name);
}
}
?>
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