PHP多部分表单数据PUT请求？ [英] PHP multipart form data PUT request?

问题描述

我在写一个RESTful API。我在使用不同动词上传图片时遇到问题。

I'm writing a RESTful API. I'm having trouble with uploading images using the different verbs.

请考虑：

可以通过对URL的post / put / delete / get请求创建/修改/删除/查看。

I have an object which can be created/modified/deleted/viewed via a post/put/delete/get request to a URL. The request is multi part form when there is a file to upload, or application/xml when there's just text to process.

要处理与上传的文件相关联的图片上传对象我正在做类似于：

To handle the image uploads which are associated with the object I am doing something like:

    if(isset($_FILES['userfile'])) {
        $data = $this->image_model->upload_image();
        if($data['error']){
            $this->response(array('error' => $error['error']));
        }
        $xml_data = (array)simplexml_load_string( urldecode($_POST['xml']) );           
        $object = (array)$xml_data['object'];
    } else {
        $object = $this->body('object');
    }

这里的主要问题是当尝试处理put请求时，$ _POST不包含put数据（据我所知！）。

The major problem here is when trying to handle a put request, obviously $_POST doesn't contain the put data (as far as I can tell!).

参考这是我如何构建请求：

For reference this is how I'm building the requests:

curl -F userfile=@./image.png -F xml="<xml><object>stuff to edit</object></xml>" 
  http://example.com/object -X PUT

有没有任何想法如何访问我的PUT请求中的 xml 变量？

Does anyone have any ideas how I can access the xml variable in my PUT request?

推荐答案

首先，处理PUT请求时，未填充 $ _ FILES 。它只在处理POST请求时由PHP填充。

First of all, $_FILES is not populated when handling PUT requests. It is only populated by PHP when handling POST requests.

您需要手动解析。这也适用于常规字段：

You need to parse it manually. That goes for "regular" fields as well:

// Fetch content and determine boundary
$raw_data = file_get_contents('php://input');
$boundary = substr($raw_data, 0, strpos($raw_data, "\r\n"));

// Fetch each part
$parts = array_slice(explode($boundary, $raw_data), 1);
$data = array();

foreach ($parts as $part) {
    // If this is the last part, break
    if ($part == "--\r\n") break; 

    // Separate content from headers
    $part = ltrim($part, "\r\n");
    list($raw_headers, $body) = explode("\r\n\r\n", $part, 2);

    // Parse the headers list
    $raw_headers = explode("\r\n", $raw_headers);
    $headers = array();
    foreach ($raw_headers as $header) {
        list($name, $value) = explode(':', $header);
        $headers[strtolower($name)] = ltrim($value, ' '); 
    } 

    // Parse the Content-Disposition to get the field name, etc.
    if (isset($headers['content-disposition'])) {
        $filename = null;
        preg_match(
            '/^(.+); *name="([^"]+)"(; *filename="([^"]+)")?/', 
            $headers['content-disposition'], 
            $matches
        );
        list(, $type, $name) = $matches;
        isset($matches[4]) and $filename = $matches[4]; 

        // handle your fields here
        switch ($name) {
            // this is a file upload
            case 'userfile':
                 file_put_contents($filename, $body);
                 break;

            // default for all other files is to populate $data
            default: 
                 $data[$name] = substr($body, 0, strlen($body) - 2);
                 break;
        } 
    }

}

迭代， $ data 数组将填充您的参数， $ headers 数组将填充头对于每个部分（例如： Content-Type 等）和 $ filename 将包含原始文件名，if

At each iteration, the $data array will be populated with your parameters, and the $headers array will be populated with the headers for each part (e.g.: Content-Type, etc.), and $filename will contain the original filename, if supplied in the request and is applicable to the field.

请注意，上述操作仅适用于 multipart 内容类型。请确保在使用上述方法解析正文之前检查请求 Content-Type 。

Take note the above will only work for multipart content types. Make sure to check the request Content-Type header before using the above to parse the body.

这篇关于PHP多部分表单数据PUT请求？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！