Re: My uploaded files on Dropbox are 0 bytes/ empty.

I'll be happy to help with any issues you're having with the Dropbox API, but I'll need some more information. Please reply with:

• the name and version number of the platform and SDK/library you are using, if any
• the steps to reproduce the issue, including relevant code snippet(s), but don't include any access token(s)
• the full text of any error or unexpected output

$fileURL = 'http://localhost/wordpress/wp-content/uploads/2021/05/my-file.txt';

$tempFilePath = basename($fileURL);

try{
$path = $tempFilePath;
$fp = fopen($path, 'rb');
$size = filesize($path);

$cheaders = array('Authorization: Bearer <ACCESS_TOKEN>',
'Content-Type: application/octet-stream',
'Dropbox-API-Arg: {"path":"/'.$path.'", "mode":"add"}');

$ch = curl_init('https://content.dropboxapi.com/2/files/upload');
curl_setopt($ch, CURLOPT_HTTPHEADER, $cheaders);
curl_setopt($ch, CURLOPT_PUT, true);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');
curl_setopt($ch, CURLOPT_INFILE, $fp);
curl_setopt($ch, CURLOPT_INFILESIZE, $size);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$resp = curl_exec($ch);
curl_close($ch);
fclose($fp);

$jsonData= $resp; // put here your json object
$arrayData = json_decode($jsonData, true);
if($arrayData['size'] != 0 ){

print_r($arrayData);
// Removed file from this server atfer moved in dropbox Storage.
wp_delete_attachment($dt['upload_file_id'] );

$response = array('status' => 'success');
$response['success'] = true;
}

I am getting this output:-

array printed:

Array
(
[name] => my-file.txt
[path_lower] => /my-file.txt
[path_display] => /my-file.txt
[id] => id:B5l9vJBpsTAAAAAAAAAAbQ
[client_modified] => 2021-05-28T11:30:07Z
[server_modified] => 2021-05-28T11:30:07Z
[rev] => 015c36232ad2ec4000000019de99780
[size] => 0
[is_downloadable] => 1
[content_hash] => 1dc1597f40484ade184602a580c89f61adcedf3c5be81c74e31748ba36f2d5b9
)

Response which I am getting :

{"status":"success","success":true,"dtarray":"{\"name\": \"s12-compressor.jpg\", \"path_lower\": \"\/s12-compressor.jpg\", \"path_display\": \"\/s12-compressor.jpg\", \"id\": \"id:B5l9vJBpsTAAAAAAAAAAbQ\", \"client_modified\": \"2021-05-28T11:30:07Z\", \"server_modified\": \"2021-05-28T11:30:07Z\", \"rev\": \"015c36232ad2ec4000000019de99780\", \"size\": 0, \"is_downloadable\": true, \"content_hash\": \"1dc1597f40484ade184602a580c89f61adcedf3c5be81c74e31748ba36f2d5b9\"}"}

I just gave this a try myself, plugging in my own access token and local file path, and it successfully uploaded a non-empty file as expected for me.

You should check that your local file is non-empty and is being accessed successfully. For instance, check what the value of "$size" is for you, and make sure your "$fileURL", "$tempFilePath", and "$path" values are correct.

Thanks Sometimes this code not working and a blank file with 0kb is uploaded on dropbox sever.

Have you checked the suggestions in my last message?