标题（＆＃39;内容 - 处置：附件＆＃39;）在使用curl时不会触发

Question

我在XmlController.php的json中导出了一些发票，并在xml_export.php

中将它们转换为xml

在我的XmlController.php：

中

private function exportBills() {
    $bill_ids = $this->_getParam('bill_ids');
    $bill_model = new Model_Bills();
    $bills = $bill_model->findByIds($bill_ids);
    $data = array('bills' => array());

    $extract = array();
    foreach($bills as $bill) {
        $data['bills'][] = $bill->getJsonView();
        $extract[$bill->bill_reference_number] = $bill;
    }

    try {
        $response = $this->post('xml_export.php', $data);
        $this->getResponse()->setHttpResponseCode(200);
        return;
    } catch (Exception $e) {
        $this->view->error = 'Unknown Error';
        $this->view->description = $e->getMessage();
        $this->getResponse()->setHttpResponseCode(500);
        return;
    }
}

private function post($url, $data) {
    $data = json_encode($data);
    $headers = array_merge(
        array(
            'Accept: application/xml',
            'Content-Length: ' . strlen($data),
            'Origin: ' . get_base_url()));
    $curl = curl_init();
    curl_setopt($curl, CURLOPT_URL, $url);
    curl_setopt($curl, CURLOPT_CUSTOMREQUEST, 'POST');
    curl_setopt($curl, CURLOPT_POSTFIELDS, $data);
    curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($curl, CURLOPT_HTTPHEADER, $headers);
    curl_setopt($curl, CURLOPT_SSL_VERIFYHOST, 0);
    curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, 0);
    curl_setopt($curl, CURLOPT_CONNECTTIMEOUT, 10);

    $xml = curl_exec($curl);
    curl_close($curl);
    if(false === $xml) {
        throw new Exception('cURL failed! URL was: ' . $url);
    }
}

在我的xml_export.php：

require_once('../library/functions.php');
$json = file_get_contents('php://input');

$date = date('Y-m-d H:i:s');

try{
    $input = json_decode($json, true);
    $response = array();
    $xml_string = null;
    $xml_concat = null;
    if(implode('', array_keys($input)) === 'invoices') {
        foreach ($input['invoices'] as $invoice) { 
            $xml_data = new SimpleXMLElement('<?xml version="1.0"?><data></data>');
            array_to_xml($invoice, $xml_data);
            $xml = $xml_data->asXML();
            $xml = preg_replace('~<(\d)~', '<number$1', $xml);
            $xml = preg_replace('~<\/(\d)~', '</number$1', $xml);

            $domxml = new DOMDocument('1.0');
            $domxml->preserveWhiteSpace = false;
            $domxml->formatOutput = true;
            $domxml->loadXML($xml);
            $xml_string = $domxml->saveXML();

            $xml_concat .= $xml_string;
        }
    }elseif(implode('', array_keys($input)) === 'bills') {
        foreach ($input['bills'] as $bill) { 
            $xml_data = new SimpleXMLElement('<?xml version="1.0"?><data></data>');
            array_to_xml($bill, $xml_data);
            $xml = $xml_data->asXML();
            $xml = preg_replace('~<(\d)~', '<number$1', $xml);
            $xml = preg_replace('~<\/(\d)~', '</number$1', $xml);

            $domxml = new DOMDocument('1.0');
            $domxml->preserveWhiteSpace = false;
            $domxml->formatOutput = true;
            $domxml->loadXML($xml);
            $xml_string = $domxml->saveXML();

            $xml_concat .= $xml_string;
        }
    }

    file_put_contents('/tmp/report.xml', print_r(htmlspecialchars($xml_concat), true));

    header('Content-type: text/xml');
    header('Content-Disposition: attachment; filename="report.xml"');
    echo $xml_concat;
    readfile('/tmp/report.xml');
    exit;

}catch(OAuthException $e){
    die('Unable to export.  Please contact support for assistance');
}

我的$xml_concat肯定有输出，我的/tmp/report.xml也存在并且有输出但是没有触发下载。

以下是我的回复标题：

HTTP/1.1 200 OK
Cache-Control: no-store, no-cache, must-revalidate, post-check=0, pre-  check=0
Content-Type: application/json
Date: Sat, 26 Mar 2016 14:47:22 GMT
Expires: Thu, 19 Nov 1981 08:52:00 GMT
Pragma: no-cache
Server: nginx
Vary: Accept
X-Powered-By: PHP/5.6.16-1+deb.sury.org~trusty+1
Content-Length: 0
Connection: keep-alive

和我的请求标题：

POST /v1/xml HTTP/1.1
Connection: keep-alive
Content-Length: 81
X-Requested-With: XMLHttpRequest
User-Agent: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/49.0.2623.108 Safari/537.36
Content-Type: application/json
Accept: application/json
Accept-Encoding: gzip, deflate
Accept-Language: en-US,en;q=0.8

当我在控制器中的application/json中指定并且标题没有获取内容处置时，我不确定为什么它在application/xml中。