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<?php
/**
* Created by PhpStorm.
* User: mxgel
* Date: 11/14/16
* Time: 2:31 AM
*/
namespace Knox\Pesapal\OAuth;
use Knox\Pesapal\OAuth\Exceptions\OAuthException;
/**
* Class OAuthRequest
*
* @package Knox\Pesapal\OAuth
*/
class OAuthRequest
{
/**
* @var array|null
*/
private $parameters;
/**
* @var
*/
private $http_method;
/**
* @var
*/
private $http_url;
// for debug purposes
/**
* @var
*/
public $base_string;
/**
* @var string
*/
public static $version = '1.0';
/**
* @var string
*/
public static $POST_INPUT = 'php://input';
/**
* OAuthRequest constructor.
*
* @param $http_method
* @param $http_url
* @param null $parameters
*/
function __construct($http_method, $http_url, $parameters = NULL)
{
@$parameters or $parameters = [];
$this->parameters = $parameters;
$this->http_method = $http_method;
$this->http_url = $http_url;
}
/**
* attempt to build up a request from what was passed to the server
*/
public static function from_request($http_method = NULL, $http_url = NULL, $parameters = NULL)
{
$scheme = (!isset($_SERVER['HTTPS']) || $_SERVER['HTTPS'] != "on")
? 'http'
: 'https';
@$http_url or $http_url = $scheme .
'://' . $_SERVER['HTTP_HOST'] .
':' .
$_SERVER['SERVER_PORT'] .
$_SERVER['REQUEST_URI'];
@$http_method or $http_method = $_SERVER['REQUEST_METHOD'];
// We weren't handed any parameters, so let's find the ones relevant to
// this request.
// If you run XML-RPC or similar you should use this to provide your own
// parsed parameter-list
if (!$parameters) {
// Find request headers
$request_headers = OAuthUtil::get_headers();
// Parse the query-string to find GET parameters
$parameters = OAuthUtil::parse_parameters($_SERVER['QUERY_STRING']);
// It's a POST request of the proper content-type, so parse POST
// parameters and add those overriding any duplicates from GET
if ($http_method == "POST"
&& @strstr($request_headers["Content-Type"],
"application/x-www-form-urlencoded")
) {
$post_data = OAuthUtil::parse_parameters(
file_get_contents(self::$POST_INPUT)
);
$parameters = array_merge($parameters, $post_data);
}
// We have a Authorization-header with OAuth data. Parse the header
// and add those overriding any duplicates from GET or POST
if (@substr($request_headers['Authorization'], 0, 6) == "OAuth ") {
$header_parameters = OAuthUtil::split_header(
$request_headers['Authorization']
);
$parameters = array_merge($parameters, $header_parameters);
}
}
return new OAuthRequest($http_method, $http_url, $parameters);
}
/**
* pretty much a helper function to set up the request
*/
public static function from_consumer_and_token($consumer, $token, $http_method, $http_url, $parameters = NULL)
{
@$parameters or $parameters = [];
$defaults = [
"oauth_version" => OAuthRequest::$version,
"oauth_nonce" => OAuthRequest::generate_nonce(),
"oauth_timestamp" => OAuthRequest::generate_timestamp(),
"oauth_consumer_key" => $consumer->key,
];
if ($token) {
$defaults['oauth_token'] = $token->key;
}
$parameters = array_merge($defaults, $parameters);
return new OAuthRequest($http_method, $http_url, $parameters);
}
/**
* @param $name
* @param $value
* @param bool $allow_duplicates
*/
public function set_parameter($name, $value, $allow_duplicates = true)
{
if ($allow_duplicates && isset($this->parameters[$name])) {
// We have already added parameter(s) with this name, so add to the list
if (is_scalar($this->parameters[$name])) {
// This is the first duplicate, so transform scalar (string)
// into an array so we can add the duplicates
$this->parameters[$name] = [$this->parameters[$name]];
}
$this->parameters[$name][] = $value;
} else {
$this->parameters[$name] = $value;
}
}
/**
* @param $name
*
* @return mixed|null
*/
public function get_parameter($name)
{
return isset($this->parameters[$name]) ? $this->parameters[$name] : null;
}
/**
* @return array|null
*/
public function get_parameters()
{
return $this->parameters;
}
/**
* @param $name
*/
public function unset_parameter($name)
{
unset($this->parameters[$name]);
}
/**
* The request parameters, sorted and concatenated into a normalized string.
*
* @return string
*/
public function get_signable_parameters()
{
// Grab all parameters
$params = $this->parameters;
// Remove oauth_signature if present
// Ref: Spec: 9.1.1 ("The oauth_signature parameter MUST be excluded.")
if (isset($params['oauth_signature'])) {
unset($params['oauth_signature']);
}
return OAuthUtil::build_http_query($params);
}
/**
* Returns the base string of this request
*
* The base string defined as the method, the url
* and the parameters (normalized), each urlencoded
* and the concated with &.
*/
public function get_signature_base_string()
{
$parts = [
$this->get_normalized_http_method(),
$this->get_normalized_http_url(),
$this->get_signable_parameters(),
];
$parts = OAuthUtil::urlencode_rfc3986($parts);
return implode('&', $parts);
}
/**
* just uppercases the http method
*/
public function get_normalized_http_method()
{
return strtoupper($this->http_method);
}
/**
* parses the url and rebuilds it to be
* scheme://host/path
*/
public function get_normalized_http_url()
{
$parts = parse_url($this->http_url);
if (array_key_exists('port', $parts)) {
$port = @$parts['port'];
} else {
$port = false;
}
$scheme = $parts['scheme'];
$host = $parts['host'];
$path = @$parts['path'];
$port or $port = ($scheme == 'https') ? '443' : '80';
if (($scheme == 'https' && $port != '443')
|| ($scheme == 'http' && $port != '80')
) {
$host = "$host:$port";
}
return "$scheme://$host$path";
}
/**
* builds a url usable for a GET request
*/
public function to_url()
{
$post_data = $this->to_postdata();
$out = $this->get_normalized_http_url();
if ($post_data) {
$out .= '?' . $post_data;
}
return $out;
}
/**
* builds the data one would send in a POST request
*/
public function to_postdata()
{
return OAuthUtil::build_http_query($this->parameters);
}
/**
* builds the Authorization: header
*/
public function to_header()
{
$out = 'Authorization: OAuth realm=""';
$total = [];
foreach ($this->parameters as $k => $v) {
if (substr($k, 0, 5) != "oauth") {
continue;
}
if (is_array($v)) {
throw new OAuthException('Arrays not supported in headers');
}
$out .= ',' .
OAuthUtil::urlencode_rfc3986($k) .
'="' .
OAuthUtil::urlencode_rfc3986($v) .
'"';
}
return $out;
}
/**
* @return string
*/
public function __toString()
{
return $this->to_url();
}
/**
* @param $signature_method
* @param $consumer
* @param $token
*/
public function sign_request($signature_method, $consumer, $token)
{
$this->set_parameter(
"oauth_signature_method",
$signature_method->get_name(),
false
);
$signature = $this->build_signature($signature_method, $consumer, $token);
$this->set_parameter("oauth_signature", $signature, false);
}
/**
* @param $signature_method
* @param $consumer
* @param $token
*
* @return mixed
*/
public function build_signature($signature_method, $consumer, $token)
{
$signature = $signature_method->build_signature($this, $consumer, $token);
return $signature;
}
/**
* util function: current timestamp
*/
private static function generate_timestamp()
{
return time();
}
/**
* util function: current nonce
*/
private static function generate_nonce()
{
mt_srand((double)microtime() * 10000);//optional for php 4.2.0 and up.
$charid = strtoupper(md5(uniqid(rand(), true)));
$hyphen = chr(45);// "-"
$uuid = chr(123)// "{"
. substr($charid, 0, 8) . $hyphen
. substr($charid, 8, 4) . $hyphen
. substr($charid, 12, 4) . $hyphen
. substr($charid, 16, 4) . $hyphen
. substr($charid, 20, 12)
. chr(125);// "}"
return $uuid;
}
}