PHP Guzzle.如何为多部分POST请求设置自定义边界

Guzzle使用psr7将多部分表单字段组合到请求体中。处理自定义边界的最正确方法是使用GuzzleHttp''Psr7''MultipartStream。

$boundary = 'my_custom_boundary';
$multipart_form = [
    [
        'name' => 'upload_id',
        'contents' => $upload_id,
    ],
    [
        'name' => '_uuid',
        'contents' => $uuid,
    ],
    ...
];
$params = [
    'headers' => [
        'Connection' => 'close',
        'Content-Type' => 'multipart/form-data; boundary='.$boundary,
    ],
    'body' => new GuzzleHttp'Psr7'MultipartStream($multipart_form, $boundary), // here is all the magic
];
$res = $this->client->request($method, $url, $params);

我有同样的错误，下面是我解决它的方法。

//encode field
$field_string = json_encode($field_data);
//read file
$file_string = Flysystem::read($config['doc_path']);
// hack, request body, inject field and file into requet body, set boundary
$request_body =
  "'r'n"
  ."'r'n"
  ."--customboundary'r'n"
  ."Content-Type: application/json'r'n"
  ."Content-Disposition: form-data'r'n"
  ."'r'n"
  ."$field_string'r'n"
  ."--customboundary'r'n"
  ."Content-Type:application/pdf'r'n"
  ."Content-Disposition: file; filename=".$config['deal_name'].";documentid=".$config['deal_id']." 'r'n"
  ."'r'n"
  ."$file_string'r'n"
  ."--customboundary--'r'n"
  ."'r'n";
//create request, boundary is required for docusign api
 $result = $this->client->createRequest('POST',"$this->baseUrl/templates", [
'headers' => [
    'Content-Type' => 'multipart/form-data;boundary=customboundary',
    'Content-Length' => strlen($request_body),
    'X-DocuSign-Authentication' => json_encode([
        'Username' => Config::get('docusign.email'),
        'Password' => Config::get('docusign.password'),
        'IntegratorKey' => Config::get('docusign.integratorKey')
    ]),
   ],
  'body' => $request_body
]);