RequestToken.php

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<?php
#require_once 'Zend/Oauth/Http.php';

#require_once 'Zend/Oauth/Token/Request.php';

class Zend_Oauth_Http_RequestToken extends Zend_Oauth_Http
{
    protected $_httpClient = null;

    public function execute()
    {
        $params   = $this->assembleParams();
        $response = $this->startRequestCycle($params);
        $return   = new Zend_Oauth_Token_Request($response);
        return $return;
    }

    public function assembleParams()
    {
        $params = array(
            'oauth_consumer_key'     => $this->_consumer->getConsumerKey(),
            'oauth_nonce'            => $this->_httpUtility->generateNonce(),
            'oauth_timestamp'        => $this->_httpUtility->generateTimestamp(),
            'oauth_signature_method' => $this->_consumer->getSignatureMethod(),
            'oauth_version'          => $this->_consumer->getVersion(),
        );

        // indicates we support 1.0a
        if ($this->_consumer->getCallbackUrl()) {
            $params['oauth_callback'] = $this->_consumer->getCallbackUrl();
        } else {
            $params['oauth_callback'] = 'oob';
        }

        if (!empty($this->_parameters)) {
            $params = array_merge($params, $this->_parameters);
        }

        $params['oauth_signature'] = $this->_httpUtility->sign(
            $params,
            $this->_consumer->getSignatureMethod(),
            $this->_consumer->getConsumerSecret(),
            null,
            $this->_preferredRequestMethod,
            $this->_consumer->getRequestTokenUrl()
        );

        return $params;
    }

    public function getRequestSchemeHeaderClient(array $params)
    {
        $headerValue = $this->_httpUtility->toAuthorizationHeader(
            $params
        );
        $client = Zend_Oauth::getHttpClient();
        $client->setUri($this->_consumer->getRequestTokenUrl());
        $client->setHeaders('Authorization', $headerValue);
        $rawdata = $this->_httpUtility->toEncodedQueryString($params, true);
        if (!empty($rawdata)) {
            $client->setRawData($rawdata, 'application/x-www-form-urlencoded');
        }
        $client->setMethod($this->_preferredRequestMethod);
        return $client;
    }

    public function getRequestSchemePostBodyClient(array $params)
    {
        $client = Zend_Oauth::getHttpClient();
        $client->setUri($this->_consumer->getRequestTokenUrl());
        $client->setMethod($this->_preferredRequestMethod);
        $client->setRawData(
            $this->_httpUtility->toEncodedQueryString($params)
        );
        $client->setHeaders(
            Zend_Http_Client::CONTENT_TYPE,
            Zend_Http_Client::ENC_URLENCODED
        );
        return $client;
    }

    protected function _attemptRequest(array $params)
    {
        switch ($this->_preferredRequestScheme) {
            case Zend_Oauth::REQUEST_SCHEME_HEADER:
                $httpClient = $this->getRequestSchemeHeaderClient($params);
                break;
            case Zend_Oauth::REQUEST_SCHEME_POSTBODY:
                $httpClient = $this->getRequestSchemePostBodyClient($params);
                break;
            case Zend_Oauth::REQUEST_SCHEME_QUERYSTRING:
                $httpClient = $this->getRequestSchemeQueryStringClient($params,
                    $this->_consumer->getRequestTokenUrl());
                break;
        }
        return $httpClient->request();
    }
}