php cURL不接受我的内容类型

Question

我正在尝试使用cURL使用内容类型为application / octet-stream的PUT上传文件，但即使我使用curl_setopt设置它，内容类型也总是'text / html'。我已经在firefox和chrome中进行了测试，看看它是否是浏览器怪癖或其他东西（它不是）所以我不知道我能做些什么。

         error_reporting(E_ALL);
    ini_set('display_errors', 1);
            $ch = curl_init();
            $localfile = 'upload.txt';
            $fp = fopen($localfile, 'r');
            curl_setopt($ch, CURLOPT_URL, $url.$localfile.'?type=file');
            curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
            curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "PUT");
            curl_setopt($ch, CURLOPT_HEADER, true);
            curl_setopt($ch, CURLOPT_HTTPHEADER, array("content-type: application/octet-stream"));
            curl_setopt($ch, CURLOPT_UPLOAD, 1);
            curl_setopt($ch, CURLOPT_INFILE, $fp);
            curl_setopt($ch, CURLOPT_INFILESIZE, filesize($localfile));
            curl_setopt($ch, CURLOPT_USERPWD, $un.":".$pw);
            curl_setopt($ch, CURLOPT_VERBOSE, 1);
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
            $msg = curl_exec ($ch);
            $error_no = curl_errno($ch);
            $print = curl_getinfo($ch);
            curl_close ($ch);
            if ($error_no == 0) {
                    $error = 'File uploaded succesfully.';
            } else {
                    $error = 'File upload error.';
            }

感谢阅读。