使用Curl和PHP将多部分PUT上载到REST端点

Question

我需要HTTP使用PHP和Curl的多部分POST将一个csv文件和一些POST字段发送到REST API端点.

文件上载的内容存储在变量$ list中.另一个终点是$ url.

$ch = curl_init($url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_PUT, true);
$post = array(
    //Other Post fields array
);
curl_setopt($ch, CURLOPT_POSTFIELDS, $post);

$fh = fopen('php://memory', 'rw');
fwrite($fh, $list);
rewind($fh);
curl_setopt($ch, CURLOPT_INFILE, $fh);  
curl_setopt($ch, CURLOPT_INFILESIZE, strlen($list));  
$response = curl_exec($ch);

上面的代码似乎工作唯一的问题是另一个端点需要一个特定的字段名来进行文件上传.我如何设置文件名？

难道我做错了什么 ？

这是他们在API上提到的PUT格式

Content-Disposition: form-data; name="list[csv]"; filename="RackMultipart20110923-63966-hfpyg"
Content-Length: 33
Content-Type: text/csv
Content-Transfer-Encoding: binary

xxxx
yyyy
zzzz
-------------MultipartPost
Content-Disposition: form-data; name="list[list_type]"

Blacklist
-------------MultipartPost--

Answer 1

仅供参考multipart/form-data.你需要自己构建一个身体,我认为我不认为cURL可以通过PUT请求构建那种请求.但是,这不是一个严重的问题:

<?php

  function recursive_array_mpfd ($array, $separator, &$output, $prefix = '') {
    // Recurses through a multidimensional array and populates $output with a 
    // multipart/form-data string representing the data
    foreach ($array as $key => $val) {
      $name = ($prefix) ? $prefix."[".$key."]" : $key;
      if (is_array($val)) {
        recursive_array_mpfd($val, $separator, $output, $name);
      } else {
        $output .= "--$separator\r\n"
                 . "Content-Disposition: form-data; name=\"$name\"\r\n"
                 . "\r\n"
                 . "$val\r\n";
      }
    }
  }

  // This will hold the request body string
  $requestBody = '';

  // We'll need a separator
  $separator = '-----'.md5(microtime()).'-----';

  // First add the postfields
  $post = array(
    //Other Post fields array
  );
  recursive_array_mpfd($post, $separator, $requestBody);

  // Now add the file
  $list = "this,is,some,csv,data"; // The content of the file
  $filename = "data.csv"; // The name of the file
  $requestBody .= "--$separator\r\n"
                . "Content-Disposition: form-data; name=\"list[list_type]\"; filename=\"$filename\"\r\n"
                . "Content-Length: ".strlen($list)."\r\n"
                . "Content-Type: text/csv\r\n"
                . "Content-Transfer-Encoding: binary\r\n"
                . "\r\n"
                . "$list\r\n";

  // Terminate the body
  $requestBody .= "--$separator--";

  // Let's go cURLing...
  $ch = curl_init($url);
  curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  curl_setopt($ch, CURLOPT_PUT, true);
  curl_setopt($ch, CURLOPT_POSTFIELDS, $requestBody);
  curl_setopt($ch, CURLOPT_HTTPHEADER, array(
    'Content-Type: multipart/form-data; boundary="'.$separator.'"'
  ));
  $response = curl_exec($ch);

如果您对此有任何问题,请echo $requestBody;在cURL请求之前尝试并确保它看起来像您期望的那样.