使用mongo gridfs从文件资源中创建curl_file_create

Question

I have files inside MongoDb stored as binary data, I can get the binary data and if I var_dump it it'll show it as Resource #1000 or similar. Now I need to send this file via curl to other server for processing, however curl_file_create wants file path.

What should I do if my file has no path?

I have tried putting it inside like so but with no success.

private function sendToApi($resource, $name) {
    $cFile = curl_file_create($resource, 'application/pdf', $name);
    $postData = ['file' => $cFile];

    $ch = curl_init();
    curl_setopt($ch, CURLOPT_USERPWD, 'username' . ':' . 'pass');
    curl_setopt($ch, CURLOPT_URL, 'http://api.endpoint.com/process/pdf');
    curl_setopt($ch, CURLOPT_POST, true);
    curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);
    curl_setopt($ch, CURLOPT_HEADER, false);
    curl_setopt($ch, CURLOPT_HTTPHEADER, ['Content-Type: multipart/form-data']);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
    curl_setopt($ch, CURLOPT_TIMEOUT, 0);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, TRUE);
    curl_setopt($ch, CURLOPT_AUTOREFERER, TRUE);
    $res = curl_exec($ch);
    curl_close($ch);

    $obj = json_decode($res);
    return $obj;
}

Error

PHP Warning: curl_file_create() expects parameter 1 to be string, resource given.

Answer 1

要获取gridFS二进制数据，请使用方法“ getBytes（）” http://php.net/manual/en/mongogridfsfile.getbytes.php

$cFile = curl_file_create($resource->getBytes(), 'application/pdf', $name);

Answer 2

Create file as temp file and use it.

$tmp = tmpfile();
fwrite($tmp, $content);
fseek($tmp, 0);
$meta = stream_get_meta_data($tmp);
$cFile = curl_file_create($meta['uri'], 'application/pdf', $name);
$post = ['file' => $cFile];