我完全被这个场景卡住了，问题1：我想从一台服务器发送文件到另一台服务器，对于发送文件，我使用curl，这是通过curl发送文件的标准或更常用的代码

$url = $callthis;
$filename = $_FILES['orig_file_name']['name'];
$filedata = $_FILES['orig_file_name']['tmp_name'];
$filesize = $_FILES['orig_file_name']['size'];
if ($filedata != '')
{
   
    $headers = array("Content-Type:multipart/form-data"); // cURL headers for file uploading
    $postfields = array("orig_file_name" => "@$filedata", "filename" => $filename, 'user_id' => $this->Session->read('userid'),
                'artwork_type'=>$this->request->data['artwork_type'],
                'description'=>$this->request->data['description'],
                'itemstable_id'=>$this->request->data['itemstable_id'],
                'upload_date'=>$this->request->data['upload_date'],
                'brand_Approved'=>'New');
    $ch = curl_init();
    $options = array(
        CURLOPT_URL => $url,
        CURLOPT_HEADER => true,
        CURLOPT_POST => 1,
        CURLOPT_HTTPHEADER => $headers,
        CURLOPT_POSTFIELDS => $postfields,
        CURLOPT_INFILESIZE => $filesize,
        CURLOPT_RETURNTRANSFER => true
    ); // cURL options
    curl_setopt_array($ch, $options);
    curl_exec($ch);
    if(!curl_errno($ch))
    {
       
       $info = curl_getinfo($ch);
       debug($info);
        if ($info['http_code'] == 200)
           return $this->redirect(array('action' => 'uploadedart'));     
    }
    else
    {
        
        $errmsg = curl_error($ch);
         $this->Session->setFlash(__($errmsg));
    }
    curl_close($ch);
}

顺便说一句，curl安装在服务器上并启用了此代码在我的本地PC上完美工作，我期待在linux系统上也是如此，但我的代码将在amazone IIS服务器上实现，因此，当我上传代码，然后我测试它给我0状态代码，当我谷歌，他们说，你的网址是不正确的，这在我的情况下是正确的，所以问题是'@'在curl请求中放置在文件名之前的符号并且在phpcurl文档中他们说@ sign是必须的以便告诉接收服务器它是物理文件而不是纯文本，当我删除这个@符号时，我从接收端得到200个响应代码，但文件没有保存在所需的目录中.....
问题2：我在stackoverflow中实现了另一个家伙的代码

$url = $callthis;
$filename = $_FILES['orig_file_name']['name'];
$filedata = $_FILES['orig_file_name']['tmp_name'];
$filesize = $_FILES['orig_file_name']['size'];
//debug($this->request->data);exit();
if ($filedata != ''){
    
    move_uploaded_file($filedata, APP."webroot".DS."upload".DS.$filename);
    $newfile=APP."webroot".DS."upload".DS.$filename;
    //exit;
    /* begin stuff */
    
    $postfields = array('user_id' => $this->Session->read('userid'),
                'artwork_type'=>$this->request->data['artwork_type'],
                'description'=>$this->request->data['description'],
                'itemstable_id'=>$this->request->data['itemstable_id'],
                'upload_date'=>$this->request->data['upload_date'],
                'brand_Approved'=>'New');
    
    $file_url = $newfile;  //here is the file route, in this case is on same directory but you can set URL too like "http://examplewebsite.com/test.txt"
    $eol = "\r\n"; //default line-break for mime type
    $BOUNDARY = md5(time()); //random boundaryid, is a separator for each param on my post curl function
    $BODY=""; //init my curl body
    $BODY.= '--'.$BOUNDARY. $eol; //start param header
    $BODY .= 'Content-Disposition: form-data; name="otherfields"' . $eol . $eol; // last Content with 2 $eol, in this case is only 1 content.
    $BODY .= serialize($postfields) . $eol;//param data in this case is a simple post data and 1 $eol for the end of the data
    $BODY.= '--'.$BOUNDARY. $eol; // start 2nd param,
    $BODY.= 'Content-Disposition: form-data; name="orig_file_name"; filename="'.$filename.'"'. $eol ; //first Content data for post file, remember you only put 1 when you are going to add more Contents, and 2 on the last, to close the Content Instance
    $BODY.= 'Content-Type: application/octet-stream' . $eol; //Same before row
    $BODY.= 'Content-Transfer-Encoding: base64' . $eol . $eol; // we put the last Content and 2 $eol,
    $BODY.= chunk_split(base64_encode(file_get_contents($file_url))) . $eol; // we write the Base64 File Content and the $eol to finish the data,
    $BODY.= '--'.$BOUNDARY .'--' . $eol. $eol; // we close the param and the post width "--" and 2 $eol at the end of our boundary header.


    $ch = curl_init(); //init curl
    curl_setopt($ch, CURLOPT_HTTPHEADER, array(
                     'X_PARAM_TOKEN : 71e2cb8b-42b7-4bf0-b2e8-53fbd2f578f9' //custom header for my api validation you can get it from $_SERVER["HTTP_X_PARAM_TOKEN"] variable
                     ,"Content-Type: multipart/form-data; boundary=".$BOUNDARY) //setting our mime type for make it work on $_FILE variable
                );
    curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/1.0 (Windows NT 6.1; WOW64; rv:28.0) Gecko/20100101 Firefox/28.0'); //setting our user agent
    curl_setopt($ch, CURLOPT_URL, $url); //setting our api post url
    //curl_setopt($ch, CURLOPT_COOKIEJAR, $BOUNDARY.'.txt'); //saving cookies just in case we want
    curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1); // call return content
    curl_setopt ($ch, CURLOPT_FOLLOWLOCATION, 1); //navigate the endpoint
    curl_setopt($ch, CURLOPT_POST, true); //set as post
    curl_setopt($ch, CURLOPT_POSTFIELDS, $BODY); // set our $BODY 

    $response = curl_exec($ch); // start curl navigation

 print_r($response); //print response

这工作很好，但只有与文本文件，因为它做chunk_split(base64_encode(file_get_contents($file_url)))我的意思是读取要发送的文件，这在文本文件中工作很好，但在我的情况下，我想发送的图像，在第2期不工作，因为它修改了图像内容，因此无法打开图像。
顺便说一句，我不能做jquery/ AJAX 文件发送，我需要通过php来做，所以答案应该是有效的可行的curl请求代码来发送文件或cakephp httpsocket与发送文件