php 에서 twitter oauth API를 사용하는 법을 써 보려 한다. 
난 처음에 이해를 늦게 했지만, 그리 어렵지 않은 방법이니 쉽게 할수 있을것이다.

1) twit/redirect.php?no=100809000010&category=shop
나는 먼저 No(상품값) 과 category(상품디테일 과 장바구니) 의 값을 넘겨주었다.

<?php

/* Start session and load library. */
session_start();
require_once('twitteroauth/twitteroauth.php');
require_once('config.php');

if( !$docRoot ) $docRoot = getenv('WWW_ROOT');
if( !$libDir ) $libDir = getenv('PHPLIB_DIR');


include $libDir . '/global_func.inc.php';
include $libDir . '/key_control.inc.php';
//include $docRoot . '/common/comLib.inc';
include $docRoot . '/member/member_config.php';

$no = $_REQUEST['no'];
$category = $_REQUEST['category'];
$reply_id = $_REQUEST['reply_id'];
 
SetCookie("m_no", $no, 0, "/", $COOKIE_DOMAIN );
SetCookie("m_category", $category, 0, "/", $COOKIE_DOMAIN );
SetCookie("m_reply_id", $reply_id, 0, "/", $COOKIE_DOMAIN );
/* Build TwitterOAuth object with client credentials. */
$connection = new TwitterOAuth(CONSUMER_KEY, CONSUMER_SECRET);
 
/* Get temporary credentials. */
$request_token = $connection->getRequestToken(OAUTH_CALLBACK);

/* Save temporary credentials to session. */
$_SESSION['oauth_token'] = $token = $request_token['oauth_token'];
$_SESSION['oauth_token_secret'] = $request_token['oauth_token_secret'];

/* If last connection failed don't display authorization link. */
switch ($connection->http_code) {
  case 200:
    /* Build authorize URL and redirect user to Twitter. */
    $url = $connection->getAuthorizeURL($token);
    header('Location: ' . $url ); 
    break;
  default:
    /* Show notification if something went wrong. */
    echo 'Could not connect to Twitter. Refresh the page or try again later.';
}


twitteroauth/twitteroauth.php
<?php /* * Abraham Williams (abraham@abrah.am) http://abrah.am * * The first PHP Library to support OAuth for Twitter's REST API. */ /* Load OAuth lib. You can find it at http://oauth.net */
require_once('OAuth.php'); /** * Twitter OAuth class */ class TwitterOAuth { /* Contains the last HTTP status code returned. */ public $http_code; /* Contains the last API call. */ public $url; /* Set up the API root URL. */ public $host = "https://api.twitter.com/1/"; /* Set timeout default. */ public $timeout = 30; /* Set connect timeout. */ public $connecttimeout = 30; /* Verify SSL Cert. */ public $ssl_verifypeer = FALSE; /* Respons format. */ public $format = 'json'; /* Decode returned json data. */ public $decode_json = TRUE; /* Contains the last HTTP headers returned. */ public $http_info; /* Set the useragnet. */ public $useragent = 'TwitterOAuth v0.2.0-beta2'; /* Immediately retry the API call if the response was not successful. */ //public $retry = TRUE; /** * Set API URLS */ function accessTokenURL() { return 'https://api.twitter.com/oauth/access_token'; } function authenticateURL() { return 'https://twitter.com/oauth/authenticate'; } function authorizeURL() { return 'https://twitter.com/oauth/authorize'; } function requestTokenURL() { return 'https://api.twitter.com/oauth/request_token'; } /** * Debug helpers */ function lastStatusCode() { return $this->http_status; } function lastAPICall() { return $this->last_api_call; } /** * construct TwitterOAuth object */ function __construct($consumer_key, $consumer_secret, $oauth_token = NULL, $oauth_token_secret = NULL) { $this->sha1_method = new OAuthSignatureMethod_HMAC_SHA1(); $this->consumer = new OAuthConsumer($consumer_key, $consumer_secret); if (!empty($oauth_token) && !empty($oauth_token_secret)) { $this->token = new OAuthConsumer($oauth_token, $oauth_token_secret); } else { $this->token = NULL; } } /** * Get a request_token from Twitter * * @returns a key/value array containing oauth_token and oauth_token_secret */ function getRequestToken($oauth_callback = NULL) { $parameters = array(); if (!empty($oauth_callback)) { $parameters['oauth_callback'] = $oauth_callback; } $request = $this->oAuthRequest($this->requestTokenURL(), 'GET', $parameters); $token = OAuthUtil::parse_parameters($request); $this->token = new OAuthConsumer($token['oauth_token'], $token['oauth_token_secret']); return $token; } /** * Get the authorize URL * * @returns a string */ function getAuthorizeURL($token, $sign_in_with_twitter = TRUE) { if (is_array($token)) { $token = $token['oauth_token']; } if (empty($sign_in_with_twitter)) { return $this->authorizeURL() . "?oauth_token={$token}"; } else { return $this->authenticateURL() . "?oauth_token={$token}"; } } /** * Exchange request token and secret for an access token and * secret, to sign API calls. * * @returns array("oauth_token" => "the-access-token", * "oauth_token_secret" => "the-access-secret", * "user_id" => "9436992", * "screen_name" => "abraham") */ function getAccessToken($oauth_verifier = FALSE) { $parameters = array(); if (!empty($oauth_verifier)) { $parameters['oauth_verifier'] = $oauth_verifier; } $request = $this->oAuthRequest($this->accessTokenURL(), 'GET', $parameters); $token = OAuthUtil::parse_parameters($request); $this->token = new OAuthConsumer($token['oauth_token'], $token['oauth_token_secret']); return $token; } /** * One time exchange of username and password for access token and secret. * * @returns array("oauth_token" => "the-access-token", * "oauth_token_secret" => "the-access-secret", * "user_id" => "9436992", * "screen_name" => "abraham", * "x_auth_expires" => "0") */ function getXAuthToken($username, $password) { $parameters = array(); $parameters['x_auth_username'] = $username; $parameters['x_auth_password'] = $password; $parameters['x_auth_mode'] = 'client_auth'; $request = $this->oAuthRequest($this->accessTokenURL(), 'POST', $parameters); $token = OAuthUtil::parse_parameters($request); $this->token = new OAuthConsumer($token['oauth_token'], $token['oauth_token_secret']); return $token; } /** * GET wrapper for oAuthRequest. */ function get($url, $parameters = array()) { $response = $this->oAuthRequest($url, 'GET', $parameters); if ($this->format === 'json' && $this->decode_json) { return json_decode($response); } return $response; } /** * POST wrapper for oAuthRequest. */ function post($url, $parameters = array()) { $response = $this->oAuthRequest($url, 'POST', $parameters); if ($this->format === 'json' && $this->decode_json) { return json_decode($response); } return $response; } /** * DELETE wrapper for oAuthReqeust. */ function delete($url, $parameters = array()) { $response = $this->oAuthRequest($url, 'DELETE', $parameters); if ($this->format === 'json' && $this->decode_json) { return json_decode($response); } return $response; } /** * Format and sign an OAuth / API request */ function oAuthRequest($url, $method, $parameters) { if (strrpos($url, 'https://') !== 0 && strrpos($url, 'http://') !== 0) { $url = "{$this->host}{$url}.{$this->format}"; } $request = OAuthRequest::from_consumer_and_token($this->consumer, $this->token, $method, $url, $parameters); $request->sign_request($this->sha1_method, $this->consumer, $this->token); switch ($method) { case 'GET': return $this->http($request->to_url(), 'GET'); default: return $this->http($request->get_normalized_http_url(), $method, $request->to_postdata()); } } /** * Make an HTTP request * * @return API results */ function http($url, $method, $postfields = NULL) { $this->http_info = array(); $ci = curl_init(); /* Curl settings */ curl_setopt($ci, CURLOPT_USERAGENT, $this->useragent); curl_setopt($ci, CURLOPT_CONNECTTIMEOUT, $this->connecttimeout); curl_setopt($ci, CURLOPT_TIMEOUT, $this->timeout); curl_setopt($ci, CURLOPT_RETURNTRANSFER, TRUE); curl_setopt($ci, CURLOPT_HTTPHEADER, array('Expect:')); curl_setopt($ci, CURLOPT_SSL_VERIFYPEER, $this->ssl_verifypeer); curl_setopt($ci, CURLOPT_HEADERFUNCTION, array($this, 'getHeader')); curl_setopt($ci, CURLOPT_HEADER, FALSE); switch ($method) { case 'POST': curl_setopt($ci, CURLOPT_POST, TRUE); if (!empty($postfields)) { curl_setopt($ci, CURLOPT_POSTFIELDS, $postfields); } break; case 'DELETE': curl_setopt($ci, CURLOPT_CUSTOMREQUEST, 'DELETE'); if (!empty($postfields)) { $url = "{$url}?{$postfields}"; } } curl_setopt($ci, CURLOPT_URL, $url); $response = curl_exec($ci); $this->http_code = curl_getinfo($ci, CURLINFO_HTTP_CODE); $this->http_info = array_merge($this->http_info, curl_getinfo($ci)); $this->url = $url; curl_close ($ci); return $response; } /** * Get the header info to store. */ function getHeader($ch, $header) { $i = strpos($header, ':'); if (!empty($i)) { $key = str_replace('-', '_', strtolower(substr($header, 0, $i))); $value = trim(substr($header, $i + 2)); $this->http_header[$key] = $value; } return strlen($header); } }

config.php
<?php if( !$docRoot ) $docRoot = getenv('WWW_ROOT'); if( !$libDir ) $libDir = getenv('PHPLIB_DIR'); if( !function_exists('global_set') ) { include $libDir . '/global_var.inc.php'; } /** * @file * A single location to store configuration. */ define('CONSUMER_KEY',
'xxxxxxxxxxxxx'); define('CONSUMER_SECRET', 'xxxxxxxxxxxxxxxxxxxxxxx'); define('OAUTH_CALLBACK', 'callback.php');
callback.php
<?php /** * @file * Take the user when they return from Twitter. Get access tokens. * Verify credentials and redirect to based on response from Twitter. */ /* Start session and load lib */ session_start();
require_once('twitteroauth/twitteroauth.php'); require_once('config.php'); if( !$docRoot ) $docRoot = getenv('WWW_ROOT'); if( !$libDir ) $libDir = getenv('PHPLIB_DIR'); if( !function_exists('global_set') ) { include $libDir . '/global_var.inc.php'; } include $libDir . '/global_func.inc.php'; include $libDir . '/key_control.inc.php'; //include $docRoot . '/common/comLib.inc'; include $docRoot . '/member/member_config.php'; $no = $_REQUEST['no']; $category = $_REQUEST['category']; /* If the oauth_token is old redirect to the connect page. */ if (isset($_REQUEST['oauth_token']) && $_SESSION['oauth_token'] !== $_REQUEST['oauth_token']) { $_SESSION['oauth_status'] = 'oldtoken'; header('Location: ./clearsessions.php'); } /* Create TwitteroAuth object with app key/secret and token key/secret from default phase */ $connection = new TwitterOAuth(CONSUMER_KEY, CONSUMER_SECRET, $_SESSION['oauth_token'], $_SESSION['oauth_token_secret']); /* Request access tokens from twitter */ $access_token = $connection->getAccessToken($_REQUEST['oauth_verifier']); /* If method is set change API call made. Test is called by default. */ $content = $connection->get('account/verify_credentials'); $con = json_encode($content); $con = json_decode($con,true); /* Save the access tokens. Normally these would be saved in a database for future use. */ SetCookie("comefrom", "twitter", time()+900, "/", $COOKIE_DOMAIN ); SetCookie("oauth_token", $access_token['oauth_token'], time()+900, "/", $COOKIE_DOMAIN ); SetCookie("oauth_token_secret", $access_token['oauth_token_secret'], time()+900, "/", $COOKIE_DOMAIN ); SetCookie("twitter_user_id", $access_token['user_id'], time()+900, "/", $COOKIE_DOMAIN ); SetCookie("screen_name", $access_token['screen_name'], time()+900, "/", $COOKIE_DOMAIN ); SetCookie("t_img", $con[profile_image_url], time()+900, "/", $COOKIE_DOMAIN ); /* Remove no longer needed request tokens */ unset($_SESSION['oauth_token']); unset($_SESSION['oauth_token_secret']); /* If HTTP response is 200 continue otherwise send to connect page to retry */ if (200 == $connection->http_code) { /* The user has been verified and the access tokens can be saved for future use */ $_SESSION['status'] = 'verified'; // 이부분에 디비 작업을 하시면됩니다. /* $up = mysql_query("update `member_db` set oauth_token='$access_token[oauth_token]', oauth_token='$access_token[oauth_token_secret]', user_id='$access_token[user_id]', screen_name='$access_token[screen_name]' where user='$user' "); */ /* echo '<script language="javascript"> document.domain = "'.$DOCUMENT_DOMAIN.'"; opener.window.location.reload() self.close(); </script> '; */ //echo "<a href='clearsessions.php'>Clear Sessions</a>"; header('Location: ./index.php'); } else { /* Save HTTP status for error dialog on connnect page.*/ header('Location: ./clearsessions.php'); } ?>
<?php /** * @file * User has successfully authenticated with Twitter. Access tokens saved to session and DB. */ /* Load required lib files. */ session_start(); require_once('twitteroauth/twitteroauth.php'); require_once('config.php'); /* If access tokens are not available redirect to connect page. */ if (empty($_SESSION['access_token']) || empty($_SESSION['access_token']['oauth_token']) || empty($_SESSION['access_token']['oauth_token_secret'])) { header('Location: ./clearsessions.php'); } /* Get user access tokens out of the session. */ $access_token = $_SESSION['access_token']; /* Create a TwitterOauth object with consumer/user tokens. */ $connection = new TwitterOAuth(CONSUMER_KEY, CONSUMER_SECRET, $access_token['oauth_token'], $access_token['oauth_token_secret']); /* If method is set change API call made. Test is called by default. */ $content = $connection->get('account/verify_credentials'); /* Some example calls */ //$connection->get('users/show', array('screen_name' => 'abraham'))); //$connection->post('statuses/update', array('status' => date(DATE_RFC822))); //$connection->post('statuses/destroy', array('id' => 5437877770)); //$connection->post('friendships/create', array('id' => 9436992))); //$connection->post('friendships/destroy', array('id' => 9436992))); $con = json_encode($content); $con = json_decode($con,true); //print_r($con[profile_image_url]); /* Include HTML to display on the page */ include('html.inc');
html.inc

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en"> <head> <title>Twitter OAuth in PHP</title> <meta http-equiv="Content-Type" content="text/html;charset=utf-8" /> <style type="text/css"> img {border-width: 0} * {font-family:'Lucida Grande', sans-serif;} </style> </head> <body> <div> <h2>Welcome to a Twitter OAuth PHP example.</h2> <p>This site is a basic showcase of Twitters OAuth authentication method. If you are having issues try <a href='./clearsessions.php'>clearing your session</a>.</p> <p> Links: <a href='http://github.com/abraham/twitteroauth'>Source Code</a> &amp; <a href='http://wiki.github.com/abraham/twitteroauth/documentation'>Documentation</a> | Contact @<a href='http://twitter.com/abraham'>abraham</a> </p> <hr /> <?php if (isset($menu)) { ?> <?php echo $menu; ?> <?php } ?> </div> <?php if (isset($status_text)) { ?> <?php echo '<h3>'.$status_text.'</h3>'; ?> <?php } ?> <p> <pre> <?php print_r($content); ?> </pre> </p> </body> </html>
clearsessions.php
<?php /** * @file * Clears PHP sessions and redirects to the connect page. */ /* Load and clear sessions */ session_start(); session_destroy(); /* Redirect to page with the connect to Twitter option. */
header('Location: ./connect.php');
connect.php
<?php if( !$docRoot ) $docRoot = getenv('WWW_ROOT'); if( !$libDir ) $libDir = getenv('PHPLIB_DIR'); if( !function_exists('global_set') ) { include $libDir . '/global_var.inc.php'; } include $libDir . '/global_func.inc.php'; include $libDir . '/key_control.inc.php'; //include $docRoot . '/common/comLib.inc'; include $docRoot . '/member/member_config.php'; /** * @file * Check if consumer token is set and if so send user to get a request token. */ /** * Exit with an error message if the CONSUMER_KEY or CONSUMER_SECRET is not defined. */ require_once('config.php'); if (CONSUMER_KEY === '' || CONSUMER_SECRET === '') { echo 'You need a consumer key and secret to test the sample code. Get one from <a href="https://twitter.com/apps">https://twitter.com/apps</a>'; exit; } /* Build an image link to start the redirect process. */ $content = '<a href="./redirect.php"><img src="./images/lighter.png" alt="Sign in with Twitter"/></a>'; /* Include HTML to display on the page. */ //echo "category=".$_COOKIE['m_category']; //exit; //if (!$_COOKIE['m_reply_id']){ if ($_COOKIE['m_category'] == 'shop'){ echo "<script>location.replace('list_detail.php?no=".$_COOKIE['m_no']."')</script>"; }else{ echo "<script>location.replace('giftyshow_basket.php')</script>"; } /* echo ' <script language="javascript"> document.domain = "'.$DOCUMENT_DOMAIN.'"; opener.parent.document.location.reload(); self.close(); </script> '; */ //include('html.inc');  



OAuth.php
<?php // vim: foldmethod=marker /* Generic exception class */ class OAuthException extends Exception { // pass } class OAuthConsumer { public $key; public $secret; function __construct($key, $secret, $callback_url=NULL) { $this->key = $key; $this->secret = $secret; $this->callback_url = $callback_url; } function __toString() { return "OAuthConsumer[key=$this->key,secret=$this->secret]"; } } class OAuthToken { // access tokens and request tokens public $key; public $secret; /** * key = the token * secret = the token secret */ function __construct($key, $secret) { $this->key = $key; $this->secret = $secret; } /** * generates the basic string serialization of a token that a server * would respond to request_token and access_token calls with */ function to_string() { return "oauth_token=" . OAuthUtil::urlencode_rfc3986($this->key) . "&oauth_token_secret=" . OAuthUtil::urlencode_rfc3986($this->secret); } function __toString() { return $this->to_string(); } } /** * A class for implementing a Signature Method * See section 9 ("Signing Requests") in the spec */ abstract class OAuthSignatureMethod { /** * Needs to return the name of the Signature Method (ie HMAC-SHA1) * @return string */ abstract public function get_name(); /** * Build up the signature * NOTE: The output of this function MUST NOT be urlencoded. * the encoding is handled in OAuthRequest when the final * request is serialized * @param OAuthRequest $request * @param OAuthConsumer $consumer * @param OAuthToken $token * @return string */ abstract public function build_signature($request, $consumer, $token); /** * Verifies that a given signature is correct * @param OAuthRequest $request * @param OAuthConsumer $consumer * @param OAuthToken $token * @param string $signature * @return bool */ public function check_signature($request, $consumer, $token, $signature) { $built = $this->build_signature($request, $consumer, $token); return $built == $signature; } } /** * The HMAC-SHA1 signature method uses the HMAC-SHA1 signature algorithm as defined in [RFC2104] * where the Signature Base String is the text and the key is the concatenated values (each first * encoded per Parameter Encoding) of the Consumer Secret and Token Secret, separated by an '&' * character (ASCII code 38) even if empty. * - Chapter 9.2 ("HMAC-SHA1") */ class OAuthSignatureMethod_HMAC_SHA1 extends OAuthSignatureMethod { function get_name() { return "HMAC-SHA1"; } public function build_signature($request, $consumer, $token) { $base_string = $request->get_signature_base_string(); $request->base_string = $base_string; $key_parts = array( $consumer->secret, ($token) ? $token->secret : "" ); $key_parts = OAuthUtil::urlencode_rfc3986($key_parts); $key = implode('&', $key_parts); return base64_encode(hash_hmac('sha1', $base_string, $key, true)); } } /** * The PLAINTEXT method does not provide any security protection and SHOULD only be used * over a secure channel such as HTTPS. It does not use the Signature Base String. * - Chapter 9.4 ("PLAINTEXT") */ class OAuthSignatureMethod_PLAINTEXT extends OAuthSignatureMethod { public function get_name() { return "PLAINTEXT"; } /** * oauth_signature is set to the concatenated encoded values of the Consumer Secret and * Token Secret, separated by a '&' character (ASCII code 38), even if either secret is * empty. The result MUST be encoded again. * - Chapter 9.4.1 ("Generating Signatures") * * Please note that the second encoding MUST NOT happen in the SignatureMethod, as * OAuthRequest handles this! */ public function build_signature($request, $consumer, $token) { $key_parts = array( $consumer->secret, ($token) ? $token->secret : "" ); $key_parts = OAuthUtil::urlencode_rfc3986($key_parts); $key = implode('&', $key_parts); $request->base_string = $key; return $key; } } /** * The RSA-SHA1 signature method uses the RSASSA-PKCS1-v1_5 signature algorithm as defined in * [RFC3447] section 8.2 (more simply known as PKCS#1), using SHA-1 as the hash function for * EMSA-PKCS1-v1_5. It is assumed that the Consumer has provided its RSA public key in a * verified way to the Service Provider, in a manner which is beyond the scope of this * specification. * - Chapter 9.3 ("RSA-SHA1") */ abstract class OAuthSignatureMethod_RSA_SHA1 extends OAuthSignatureMethod { public function get_name() { return "RSA-SHA1"; } // Up to the SP to implement this lookup of keys. Possible ideas are: // (1) do a lookup in a table of trusted certs keyed off of consumer // (2) fetch via http using a url provided by the requester // (3) some sort of specific discovery code based on request // // Either way should return a string representation of the certificate protected abstract function fetch_public_cert(&$request); // Up to the SP to implement this lookup of keys. Possible ideas are: // (1) do a lookup in a table of trusted certs keyed off of consumer // // Either way should return a string representation of the certificate protected abstract function fetch_private_cert(&$request); public function build_signature($request, $consumer, $token) { $base_string = $request->get_signature_base_string(); $request->base_string = $base_string; // Fetch the private key cert based on the request $cert = $this->fetch_private_cert($request); // Pull the private key ID from the certificate $privatekeyid = openssl_get_privatekey($cert); // Sign using the key $ok = openssl_sign($base_string, $signature, $privatekeyid); // Release the key resource openssl_free_key($privatekeyid); return base64_encode($signature); } public function check_signature($request, $consumer, $token, $signature) { $decoded_sig = base64_decode($signature); $base_string = $request->get_signature_base_string(); // Fetch the public key cert based on the request $cert = $this->fetch_public_cert($request); // Pull the public key ID from the certificate $publickeyid = openssl_get_publickey($cert); // Check the computed signature against the one passed in the query $ok = openssl_verify($base_string, $decoded_sig, $publickeyid); // Release the key resource openssl_free_key($publickeyid); return $ok == 1; } } class OAuthRequest { private $parameters; private $http_method; private $http_url; // for debug purposes public $base_string; public static $version = '1.0'; public static $POST_INPUT = 'php://input'; function __construct($http_method, $http_url, $parameters=NULL) { @$parameters or $parameters = array(); $parameters = array_merge( OAuthUtil::parse_parameters(parse_url($http_url, PHP_URL_QUERY)), $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 = array(); $defaults = array("oauth_version" => OAuthRequest::$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, $parameters); } public function set_parameter($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] = array($this->parameters[$name]); } $this->parameters[$name][] = $value; } else { $this->parameters[$name] = $value; } } public function get_parameter($name) { return isset($this->parameters[$name]) ? $this->parameters[$name] : null; } public function get_parameters() { return $this->parameters; } public function unset_parameter($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 = array( $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); $port = @$parts['port']; $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($realm=null) { $first = true; if($realm) { $out = 'Authorization: OAuth realm="' . OAuthUtil::urlencode_rfc3986($realm) . '"'; $first = false; } else $out = 'Authorization: OAuth'; $total = array(); foreach ($this->parameters as $k => $v) { if (substr($k, 0, 5) != "oauth") continue; if (is_array($v)) { throw new OAuthException('Arrays not supported in headers'); } $out .= ($first) ? ' ' : ','; $out .= OAuthUtil::urlencode_rfc3986($k) . '="' . OAuthUtil::urlencode_rfc3986($v) . '"'; $first = false; } return $out; } public function __toString() { return $this->to_url(); } public function sign_request($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", $signature, false); } public function build_signature($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 = microtime(); $rand = mt_rand(); return md5($mt . $rand); // md5s look nicer than numbers } } class OAuthServer { protected $timestamp_threshold = 300; // in seconds, five minutes protected $version = '1.0'; // hi blaine protected $signature_methods = array(); protected $data_store; function __construct($data_store) { $this->data_store = $data_store; } public function add_signature_method($signature_method) { $this->signature_methods[$signature_method->get_name()] = $signature_method; } // high level functions /** * process a request_token request * returns the request token on success */ public function fetch_request_token(&$request) { $this->get_version($request); $consumer = $this->get_consumer($request); // no token required for the initial token request $token = NULL; $this->check_signature($request, $consumer, $token); // Rev A change $callback = $request->get_parameter('oauth_callback'); $new_token = $this->data_store->new_request_token($consumer, $callback); return $new_token; } /** * process an access_token request * returns the access token on success */ public function fetch_access_token(&$request) { $this->get_version($request); $consumer = $this->get_consumer($request); // requires authorized request token $token = $this->get_token($request, $consumer, "request"); $this->check_signature($request, $consumer, $token); // Rev A change $verifier = $request->get_parameter('oauth_verifier'); $new_token = $this->data_store->new_access_token($token, $consumer, $verifier); return $new_token; } /** * verify an api call, checks all the parameters */ public function verify_request(&$request) { $this->get_version($request); $consumer = $this->get_consumer($request); $token = $this->get_token($request, $consumer, "access"); $this->check_signature($request, $consumer, $token); return array($consumer, $token); } // Internals from here /** * version 1 */ private function get_version(&$request) { $version = $request->get_parameter("oauth_version"); if (!$version) { // Service Providers MUST assume the protocol version to be 1.0 if this parameter is not present. // Chapter 7.0 ("Accessing Protected Ressources") $version = '1.0'; } if ($version !== $this->version) { throw new OAuthException("OAuth version '$version' not supported"); } return $version; } /** * figure out the signature with some defaults */ private function get_signature_method(&$request) { $signature_method = @$request->get_parameter("oauth_signature_method"); if (!$signature_method) { // According to chapter 7 ("Accessing Protected Ressources") the signature-method // parameter is required, and we can't just fallback to PLAINTEXT throw new OAuthException('No signature method parameter. This parameter is required'); } if (!in_array($signature_method, array_keys($this->signature_methods))) { throw new OAuthException( "Signature method '$signature_method' not supported " . "try one of the following: " . implode(", ", array_keys($this->signature_methods)) ); } return $this->signature_methods[$signature_method]; } /** * try to find the consumer for the provided request's consumer key */ private function get_consumer(&$request) { $consumer_key = @$request->get_parameter("oauth_consumer_key"); if (!$consumer_key) { throw new OAuthException("Invalid consumer key"); } $consumer = $this->data_store->lookup_consumer($consumer_key); if (!$consumer) { throw new OAuthException("Invalid consumer"); } return $consumer; } /** * try to find the token for the provided request's token key */ private function get_token(&$request, $consumer, $token_type="access") { $token_field = @$request->get_parameter('oauth_token'); $token = $this->data_store->lookup_token( $consumer, $token_type, $token_field ); if (!$token) { throw new OAuthException("Invalid $token_type token: $token_field"); } return $token; } /** * all-in-one function to check the signature on a request * should guess the signature method appropriately */ private function check_signature(&$request, $consumer, $token) { // this should probably be in a different method $timestamp = @$request->get_parameter('oauth_timestamp'); $nonce = @$request->get_parameter('oauth_nonce'); $this->check_timestamp($timestamp); $this->check_nonce($consumer, $token, $nonce, $timestamp); $signature_method = $this->get_signature_method($request); $signature = $request->get_parameter('oauth_signature'); $valid_sig = $signature_method->check_signature( $request, $consumer, $token, $signature ); if (!$valid_sig) { throw new OAuthException("Invalid signature"); } } /** * check that the timestamp is new enough */ private function check_timestamp($timestamp) { if( ! $timestamp ) throw new OAuthException( 'Missing timestamp parameter. The parameter is required' ); // verify that timestamp is recentish $now = time(); if (abs($now - $timestamp) > $this->timestamp_threshold) { throw new OAuthException( "Expired timestamp, yours $timestamp, ours $now" ); } } /** * check that the nonce is not repeated */ private function check_nonce($consumer, $token, $nonce, $timestamp) { if( ! $nonce ) throw new OAuthException( 'Missing nonce parameter. The parameter is required' ); // verify that the nonce is uniqueish $found = $this->data_store->lookup_nonce( $consumer, $token, $nonce, $timestamp ); if ($found) { throw new OAuthException("Nonce already used: $nonce"); } } } class OAuthDataStore { function lookup_consumer($consumer_key) { // implement me } function lookup_token($consumer, $token_type, $token) { // implement me } function lookup_nonce($consumer, $token, $nonce, $timestamp) { // implement me } function new_request_token($consumer, $callback = null) { // return a new token attached to this consumer } function new_access_token($token, $consumer, $verifier = null) { // return a new access token attached to this consumer // for the user associated with this token if the request token // is authorized // should also invalidate the request token } } class OAuthUtil { public static function urlencode_rfc3986($input) { if (is_array($input)) { return array_map(array('OAuthUtil', 'urlencode_rfc3986'), $input); } else if (is_scalar($input)) { return str_replace( '+', ' ', str_replace('%7E', '~', rawurlencode($input)) ); } else { return ''; } } // This decode function isn't taking into consideration the above // modifications to the encoding process. However, this method doesn't // seem to be used anywhere so leaving it as is. public static function urldecode_rfc3986($string) { return urldecode($string); } // Utility function for turning the Authorization: header into // parameters, has to do some unescaping // Can filter out any non-oauth parameters if needed (default behaviour) public static function split_header($header, $only_allow_oauth_parameters = true) { $pattern = '/(([-_a-z]*)=("([^"]*)"|([^,]*)),?)/'; $offset = 0; $params = array(); while (preg_match($pattern, $header, $matches, PREG_OFFSET_CAPTURE, $offset) > 0) { $match = $matches[0]; $header_name = $matches[2][0]; $header_content = (isset($matches[5])) ? $matches[5][0] : $matches[4][0]; if (preg_match('/^oauth_/', $header_name) || !$only_allow_oauth_parameters) { $params[$header_name] = OAuthUtil::urldecode_rfc3986($header_content); } $offset = $match[1] + strlen($match[0]); } if (isset($params['realm'])) { unset($params['realm']); } return $params; } // helper to try to sort out headers for people who aren't running apache public static function get_headers() { if (function_exists('apache_request_headers')) { // we need this to get the actual Authorization: header // because apache tends to tell us it doesn't exist $headers = apache_request_headers(); // sanitize the output of apache_request_headers because // we always want the keys to be Cased-Like-This and arh() // returns the headers in the same case as they are in the // request $out = array(); foreach( $headers AS $key => $value ) { $key = str_replace( " ", "-", ucwords(strtolower(str_replace("-", " ", $key))) ); $out[$key] = $value; } } else { // otherwise we don't have apache and are just going to have to hope // that $_SERVER actually contains what we need $out = array(); if( isset($_SERVER['CONTENT_TYPE']) ) $out['Content-Type'] = $_SERVER['CONTENT_TYPE']; if( isset($_ENV['CONTENT_TYPE']) ) $out['Content-Type'] = $_ENV['CONTENT_TYPE']; foreach ($_SERVER as $key => $value) { if (substr($key, 0, 5) == "HTTP_") { // this is chaos, basically it is just there to capitalize the first // letter of every word that is not an initial HTTP and strip HTTP // code from przemek $key = str_replace( " ", "-", ucwords(strtolower(str_replace("_", " ", substr($key, 5)))) ); $out[$key] = $value; } } } return $out; } // This function takes a input like a=b&a=c&d=e and returns the parsed // parameters like this // array('a' => array('b','c'), 'd' => 'e') public static function parse_parameters( $input ) { if (!isset($input) || !$input) return array(); $pairs = explode('&', $input); $parsed_parameters = array(); foreach ($pairs as $pair) { $split = explode('=', $pair, 2); $parameter = OAuthUtil::urldecode_rfc3986($split[0]); $value = isset($split[1]) ? OAuthUtil::urldecode_rfc3986($split[1]) : ''; if (isset($parsed_parameters[$parameter])) { // We have already recieved parameter(s) with this name, so add to the list // of parameters with this name if (is_scalar($parsed_parameters[$parameter])) { // This is the first duplicate, so transform scalar (string) into an array // so we can add the duplicates $parsed_parameters[$parameter] = array($parsed_parameters[$parameter]); } $parsed_parameters[$parameter][] = $value; } else { $parsed_parameters[$parameter] = $value; } } return $parsed_parameters; } public static function build_http_query($params) { if (!$params) return ''; // Urlencode both keys and values $keys = OAuthUtil::urlencode_rfc3986(array_keys($params)); $values = OAuthUtil::urlencode_rfc3986(array_values($params)); $params = array_combine($keys, $values); // Parameters are sorted by name, using lexicographical byte value ordering. // Ref: Spec: 9.1.1 (1) uksort($params, 'strcmp'); $pairs = array(); foreach ($params as $parameter => $value) { if (is_array($value)) { // If two or more parameters share the same name, they are sorted by their value // Ref: Spec: 9.1.1 (1) natsort($value); foreach ($value as $duplicate_value) { $pairs[] = $parameter . '=' . $duplicate_value; } } else { $pairs[] = $parameter . '=' . $value; } } // For each parameter, the name is separated from the corresponding value by an '=' character (ASCII code 61) // Each name-value pair is separated by an '&' character (ASCII code 38) return implode('&', $pairs); } } ?>


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