微博授权功能用code换取access_token问题

最近在做微博授权的功能，我拿到了第一次的code，但是第二次去换access_token出错显示{"error":"HTTP METHOD is not suported for this request!","error_code":10021,"request":"/oauth2/access_token"}，查资料知道是提交必须是post请求。
 https://api.weibo.com/oauth2/access_token?client_id=101393&client_secret=a2d375c81a&grant_type=authorization_code&redirect_uri=http://127.0.0.1:8080/scrm/api/weibo/bindGetAccessToken&code=1101a1c76b3；这是我第二次的地址，我怎么能在后台通过post方式发送请求呢，急求，问了很多同事，也没想出办法。
    转发的话这个地址会加上原有地址，重定向又需要传参数还得是post，查资料试过httpclient，redirectview都没用！！

使用curl 用post请求获取数据

 $this->http_info = array();
        $ci = curl_init();
        /* Curl settings */
        curl_setopt($ci, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_1_0);
        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($ci, CURLOPT_ENCODING, "");
        curl_setopt($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);
                    $this->postdata = $postfields;
                }
                break;
            case 'DELETE':
                curl_setopt($ci, CURLOPT_CUSTOMREQUEST, 'DELETE');
                if (!empty($postfields)) {
                    $url = "{$url}?{$postfields}";
                }
        }

        if ( isset($this->access_token) && $this->access_token )
            $headers[] = "Authorization: OAuth2 ".$this->access_token;

        $headers[] = "API-RemoteIP: " . $_SERVER['REMOTE_ADDR'];
        curl_setopt($ci, CURLOPT_URL, $url );
        curl_setopt($ci, CURLOPT_HTTPHEADER, $headers );
        curl_setopt($ci, CURLINFO_HEADER_OUT, TRUE );

        $response = curl_exec($ci);
        $this->http_code = curl_getinfo($ci, CURLINFO_HTTP_CODE);
        $this->http_info = array_merge($this->http_info, curl_getinfo($ci));
        $this->url = $url;

        if ($this->debug) {
            echo "=====post data======\r\n";
            var_dump($postfields);

            echo '=====info====='."\r\n";
            print_r( curl_getinfo($ci) );

            echo '=====$response====='."\r\n";
            print_r( $response );
        }
        curl_close ($ci);
        return $response;

第一，感谢帮助。后来问题解决了。因为当时第一次做微博授权。并不知道微博给的api里面有相关httpclient的封装。后来找到那个类，调用就好了。