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<?php
namespace Laminas\OAuth;
/**
* @category Laminas
* @package Laminas_OAuth
*/
class Http
{
/**
* Array of all custom service parameters to be sent in the HTTP request
* in addition to the usual OAuth parameters.
*
* @var array
*/
protected $parameters = [];
/**
* Reference to the Consumer instance in use.
*
* @var Consumer
*/
protected $consumer = null;
/**
* OAuth specifies three request methods, this holds the current preferred
* one which by default uses the Authorization Header approach for passing
* OAuth parameters, and a POST body for non-OAuth custom parameters.
*
* @var string
*/
protected $preferredRequestScheme = null;
/**
* Request Method for the HTTP Request.
*
* @var string
*/
protected $preferredRequestMethod = OAuth::POST;
/**
* Instance of the general Laminas\OAuth\Http\Utility class.
*
* @var \Laminas\OAuth\Http\Utility
*/
protected $httpUtility = null;
/**
* Constructor
*
* @param \Laminas\OAuth\Consumer $consumer
* @param null|array $parameters
* @param null|\Laminas\OAuth\Http\Utility $utility
* @return void
*/
public function __construct(
Consumer $consumer,
array $parameters = null,
Http\Utility $utility = null
) {
$this->consumer = $consumer;
$this->preferredRequestScheme = $this->consumer->getRequestScheme();
if ($parameters !== null) {
$this->setParameters($parameters);
}
if ($utility !== null) {
$this->httpUtility = $utility;
} else {
$this->httpUtility = new Http\Utility;
}
}
/**
* Set a preferred HTTP request method.
*
* @param string $method
* @return Http
* @throws Exception\InvalidArgumentException
*/
public function setMethod($method)
{
if (! in_array($method, [OAuth::POST, OAuth::GET])) {
throw new Exception\InvalidArgumentException('invalid HTTP method: ' . $method);
}
$this->preferredRequestMethod = $method;
return $this;
}
/**
* Preferred HTTP request method accessor.
*
* @return string
*/
public function getMethod()
{
return $this->preferredRequestMethod;
}
/**
* Mutator to set an array of custom parameters for the HTTP request.
*
* @param array $customServiceParameters
* @return Http
*/
public function setParameters(array $customServiceParameters)
{
$this->parameters = $customServiceParameters;
return $this;
}
/**
* Accessor for an array of custom parameters.
*
* @return array
*/
public function getParameters()
{
return $this->parameters;
}
/**
* Return the Consumer instance in use.
*
* @return Consumer
*/
public function getConsumer()
{
return $this->consumer;
}
/**
* Commence a request cycle where the current HTTP method and OAuth
* request scheme set an upper preferred HTTP request style and where
* failures generate a new HTTP request style further down the OAuth
* preference list for OAuth Request Schemes.
* On success, return the Request object that results for processing.
*
* @todo Remove cycling?; Replace with upfront do-or-die configuration
* @param array $params
* @return \Laminas\Http\Response
* @throws Exception\InvalidArgumentException on HTTP request errors
*/
public function startRequestCycle(array $params)
{
$response = null;
$body = null;
$status = null;
try {
$response = $this->attemptRequest($params);
} catch (\Laminas\Http\Client\Exception\ExceptionInterface $e) {
throw new Exception\InvalidArgumentException(sprintf(
'Error in HTTP request: %s',
$e->getMessage()
), null, $e);
}
if ($response !== null) {
$body = $response->getBody();
$status = $response->getStatusCode();
}
if ($response === null // Request failure/exception
|| $status == 500 // Internal Server Error
|| $status == 400 // Bad Request
|| $status == 401 // Unauthorized
|| empty($body) // Missing token
) {
$this->assessRequestAttempt($response);
$response = $this->startRequestCycle($params);
}
return $response;
}
/**
* Return an instance of Laminas_Http_Client configured to use the Query
* String scheme for an OAuth driven HTTP request.
*
* @param array $params
* @param string $url
* @return \Laminas\Http\Client
*/
public function getRequestSchemeQueryStringClient(array $params, $url)
{
$client = OAuth::getHttpClient();
$client->setUri($url);
$client->getUri()->setQuery(
$this->httpUtility->toEncodedQueryString($params)
);
$client->setMethod($this->preferredRequestMethod);
return $client;
}
/**
* Manages the switch from OAuth request scheme to another lower preference
* scheme during a request cycle.
*
* @param Laminas\Http\Response
* @return void
* @throws Exception\RuntimeException if unable to retrieve valid token response
*/
protected function assessRequestAttempt(\Laminas\Http\Response $response = null)
{
switch ($this->preferredRequestScheme) {
case OAuth::REQUEST_SCHEME_HEADER:
$this->preferredRequestScheme = OAuth::REQUEST_SCHEME_POSTBODY;
break;
case OAuth::REQUEST_SCHEME_POSTBODY:
$this->preferredRequestScheme = OAuth::REQUEST_SCHEME_QUERYSTRING;
break;
default:
throw new Exception\RuntimeException(
'Could not retrieve a valid Token response from Token URL:'
. ($response !== null
? PHP_EOL . $response->getBody()
: ' No body - check for headers')
);
}
}
/**
* Generates a valid OAuth Authorization header based on the provided
* parameters and realm.
*
* @param array $params
* @param string $realm
* @return string
*/
protected function toAuthorizationHeader(array $params, $realm = null)
{
$headerValue = [];
$headerValue[] = 'OAuth realm="' . $realm . '"';
foreach ($params as $key => $value) {
if (! preg_match("/^oauth_/", $key)) {
continue;
}
$headerValue[] = Http\Utility::urlEncode($key)
. '="'
. Http\Utility::urlEncode($value)
. '"';
}
return implode(",", $headerValue);
}
/**
* Attempt a request based on the current configured OAuth Request Scheme and
* return the resulting HTTP Response.
*
* @param array $params
* @return \Laminas\Http\Response
*/
protected function attemptRequest(array $params)
{
switch ($this->preferredRequestScheme) {
case OAuth::REQUEST_SCHEME_HEADER:
$httpClient = $this->getRequestSchemeHeaderClient($params);
break;
case OAuth::REQUEST_SCHEME_POSTBODY:
$httpClient = $this->getRequestSchemePostBodyClient($params);
break;
case OAuth::REQUEST_SCHEME_QUERYSTRING:
$httpClient = $this->getRequestSchemeQueryStringClient(
$params,
$this->consumer->getRequestTokenUrl()
);
break;
}
return $httpClient->send();
}
}