php PHP多部分表单数据PUT请求？
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PHP multipart form data PUT request?
提问by Josh
I'm writing a RESTful API. I'm having trouble with uploading images using the different verbs.
我正在编写一个 RESTful API。我在使用不同的动词上传图像时遇到问题。
Consider:
考虑：
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.
我有一个对象，可以通过对 URL 的 post/put/delete/get 请求创建/修改/删除/查看。当有文件要上传时，请求是多部分形式，当只有文本要处理时，请求是应用程序/xml。
To handle the image uploads which are associated with the object I am doing something like:
为了处理与对象关联的图像上传，我正在执行以下操作：
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');
}
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!).
这里的主要问题是在尝试处理放置请求时，显然 $_POST 不包含放置数据（据我所知！）。
For reference this is how I'm building the requests:
作为参考，这是我构建请求的方式：
curl -F userfile=@./image.png -F xml="<xml><object>stuff to edit</object></xml>"
http://example.com/object -X PUT
Does anyone have any ideas how I can access the xmlvariable in my PUT request?
有没有人知道如何访问xmlPUT 请求中的变量？
回答by netcoder
First of all, $_FILESis not populated when handling PUT requests. It is only populated by PHP when handling POST requests.
首先，$_FILES在处理 PUT 请求时不会填充。它仅在处理 POST 请求时由 PHP 填充。
You need to parse it manually. That goes for "regular" fields as well:
您需要手动解析它。这也适用于“常规”字段：
// 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;
}
}
}
At each iteration, the $dataarray will be populated with your parameters, and the $headersarray will be populated with the headers for each part (e.g.: Content-Type, etc.), and $filenamewill contain the original filename, if supplied in the request and is applicable to the field.
在每次迭代中，该$data数组将填充您的参数，并且该$headers数组将填充每个部分的标头（例如：Content-Type等），$filename并将包含原始文件名（如果在请求中提供并且适用于场地。
Take note the above will only work for multipartcontent types. Make sure to check the request Content-Typeheader before using the above to parse the body.
请注意，以上仅适用于multipart内容类型。Content-Type在使用上述内容解析正文之前，请务必检查请求标头。
回答by GreenDot
Please don't delete this again, it's helpful to a majority of people coming here! All previous answers were partial answers that don't cover the solution as a majority of people asking this question would want.
请不要再次删除此内容，它对大多数来这里的人有帮助！以前的所有答案都是部分答案，不包括大多数提出此问题的人想要的解决方案。
This takes what has been said above and additionally handles multiple file uploads and places them in $_FILES as someone would expect. To get this to work, you have to add 'Script PUT /put.php' to your Virtual Host for the project per Documentation. I also suspect I'll have to setup a cron to cleanup any '.tmp' files.
这需要上面所说的内容，并另外处理多个文件上传并将它们放在 $_FILES 中，正如人们所期望的那样。要使其正常工作，您必须根据Documentation将“Script PUT /put.php”添加到项目的虚拟主机中。我还怀疑我必须设置一个 cron 来清理任何“.tmp”文件。
private function _parsePut( )
{
global $_PUT;
/* PUT data comes in on the stdin stream */
$putdata = fopen("php://input", "r");
/* Open a file for writing */
// $fp = fopen("myputfile.ext", "w");
$raw_data = '';
/* Read the data 1 KB at a time
and write to the file */
while ($chunk = fread($putdata, 1024))
$raw_data .= $chunk;
/* Close the streams */
fclose($putdata);
// Fetch content and determine boundary
$boundary = substr($raw_data, 0, strpos($raw_data, "\r\n"));
if(empty($boundary)){
parse_str($raw_data,$data);
$GLOBALS[ '_PUT' ] = $data;
return;
}
// 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;
$tmp_name = null;
preg_match(
'/^(.+); *name="([^"]+)"(; *filename="([^"]+)")?/',
$headers['content-disposition'],
$matches
);
list(, $type, $name) = $matches;
//Parse File
if( isset($matches[4]) )
{
//if labeled the same as previous, skip
if( isset( $_FILES[ $matches[ 2 ] ] ) )
{
continue;
}
//get filename
$filename = $matches[4];
//get tmp name
$filename_parts = pathinfo( $filename );
$tmp_name = tempnam( ini_get('upload_tmp_dir'), $filename_parts['filename']);
//populate $_FILES with information, size may be off in multibyte situation
$_FILES[ $matches[ 2 ] ] = array(
'error'=>0,
'name'=>$filename,
'tmp_name'=>$tmp_name,
'size'=>strlen( $body ),
'type'=>$value
);
//place in temporary directory
file_put_contents($tmp_name, $body);
}
//Parse Field
else
{
$data[$name] = substr($body, 0, strlen($body) - 2);
}
}
}
$GLOBALS[ '_PUT' ] = $data;
return;
}
回答by Pham Quang
For whom using Apiato (Laravel) framework: create new Middleware like file below, then declair this file in your laravel kernel file within the protected $middlewareGroups variable (inside web or api, whatever you want) like this:
对于使用 Apiato (Laravel) 框架的人：创建新的中间件，如下面的文件，然后在受保护的 $middlewareGroups 变量（在 web 或 api 中，无论你想要什么）的 Laravel 内核文件中声明这个文件，如下所示：
protected $middlewareGroups = [
'web' => [],
'api' => [HandlePutFormData::class],
];
<?php
namespace App\Ship\Middlewares\Http;
use Closure;
use Symfony\Component\HttpFoundation\ParameterBag;
/**
* @author Quang Pham
*/
class HandlePutFormData
{
/**
* Handle an incoming request.
*
* @param \Illuminate\Http\Request $request
* @param \Closure $next
*
* @return mixed
*/
public function handle($request, Closure $next)
{
if ($request->method() == 'POST' or $request->method() == 'GET') {
return $next($request);
}
if (preg_match('/multipart\/form-data/', $request->headers->get('Content-Type')) or
preg_match('/multipart\/form-data/', $request->headers->get('content-type'))) {
$parameters = $this->decode();
$request->merge($parameters['inputs']);
$request->files->add($parameters['files']);
}
return $next($request);
}
public function decode()
{
$files = [];
$data = [];
// Fetch content and determine boundary
$rawData = file_get_contents('php://input');
$boundary = substr($rawData, 0, strpos($rawData, "\r\n"));
// Fetch and process each part
$parts = $rawData ? array_slice(explode($boundary, $rawData), 1) : [];
foreach ($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($rawHeaders, $content) = explode("\r\n\r\n", $part, 2);
$content = substr($content, 0, strlen($content) - 2);
// Parse the headers list
$rawHeaders = explode("\r\n", $rawHeaders);
$headers = array();
foreach ($rawHeaders 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(
'/^form-data; *name="([^"]+)"(; *filename="([^"]+)")?/',
$headers['content-disposition'],
$matches
);
$fieldName = $matches[1];
$fileName = (isset($matches[3]) ? $matches[3] : null);
// If we have a file, save it. Otherwise, save the data.
if ($fileName !== null) {
$localFileName = tempnam(sys_get_temp_dir(), 'sfy');
file_put_contents($localFileName, $content);
$files = $this->transformData($files, $fieldName, [
'name' => $fileName,
'type' => $headers['content-type'],
'tmp_name' => $localFileName,
'error' => 0,
'size' => filesize($localFileName)
]);
// register a shutdown function to cleanup the temporary file
register_shutdown_function(function () use ($localFileName) {
unlink($localFileName);
});
} else {
$data = $this->transformData($data, $fieldName, $content);
}
}
}
$fields = new ParameterBag($data);
return ["inputs" => $fields->all(), "files" => $files];
}
private function transformData($data, $name, $value)
{
$isArray = strpos($name, '[]');
if ($isArray && (($isArray + 2) == strlen($name))) {
$name = str_replace('[]', '', $name);
$data[$name][]= $value;
} else {
$data[$name] = $value;
}
return $data;
}
}
Pls note: Those codes above not all mine, some from above comment, some modified by me.
请注意：上面的那些代码不是我的，一些来自上面的评论，一些是我修改的。
回答by sudip
Quoting netcoder reply : "Take note the above will only work for multipart content types"
引用 netcoder 回复：“请注意，上述内容仅适用于多部分内容类型”
To work with any content type I have added the following lines to Mr. netcoder's solution :
为了处理任何内容类型，我在 netcoder 先生的解决方案中添加了以下几行：
// Fetch content and determine boundary
$raw_data = file_get_contents('php://input');
$boundary = substr($raw_data, 0, strpos($raw_data, "\r\n"));
/*...... My edit --------- */
if(empty($boundary)){
parse_str($raw_data,$data);
return $data;
}
/* ........... My edit ends ......... */
// Fetch each part
$parts = array_slice(explode($boundary, $raw_data), 1);
$data = array();
............
...............
