How can I upload a file to a Synology diskstation with PHP - php

Question

I want to post to a Synology Disksation and upload a file with PHP. The Synology's API gives me an interface that I want to call with PHP. See the documentation below.
https://global.download.synology.com/download/Document/DeveloperGuide/Synology_File_Station_API_Guide.pdf#%5B%7B%22num%22%3A111%2C%22gen%22%3A0%7D%2C%7B%22name%22%3A%22XYZ%22%7D%2C69%2C711%2C0%5D
Here is my code, which I use for the post:
<?php
$params = array(
'path' => '/home/upload',
'create_parents' => 'true',
'overwrite' => 'true',
'api' => 'SYNO.FileStation.Upload',
'version' => 2,
'method' => 'upload'
'_sid' => [id of session after authenticate],
'file[]' => "#".path_to_file
);
$ch = curl_init();
$BODY = http_build_query($params);
curl_setopt($ch, CURLOPT_URL, 'http://ip_of_diskstation:5000/entry.cgi');
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $BODY);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
$result = curl_exec($ch);
$info = curl_getinfo($ch);
curl_close($ch);
var_dump($result);
?>
This call works, but the diskstation gives me the following JSON.
{"error":{"code":401},"success":false}
According to the documentation, there is a "Unknown error of file operation". Also, using "file_get_contents (path to file)" instead of "#".path_to_file gives me the same error from the diskstation.
How can I post a file and parameters to a synology diskstation?

Answer 1

Can you try to add _sid in your web api url like http://ip_of_diskstation:5000/entry.cgi?_sid=
I make it work using nodejs request library.
Below is the code:
let r = request.post( { url: `${web_url}/entry.cgi?_sid=${sid}` }, ( err, response, body ) => {
return callback( err, response );
});
let form = r.form();
form.append( 'api', 'SYNO.FileStation.Upload');
form.append( 'version', '2');
form.append( 'method', 'upload' );
form.append( 'overwrite', 'false' );
form.append( 'path', '<shared folder path>');
form.append( 'create_parents', 'true' );
form.append( '_sid', sid );
form.append( 'file', fs.createReadStream( file ), { 'filename' : <filename without the path>});
Regards,
Felix

Answer 2

You get :
"{"error":{"code":401},"success":false}"
Because the official document is wrong.
See Upload file through FileStation upload api for details.

Answer 3

From what I see the url that you used in CURLOPT_URL needs to be updated. Also the file that is in the $params needs to be updated.
Some side notes. Make sure your settings for the user's SID has permissions set properly. Also make sure you updated the $_FILES["uploadfile"] to include whatever name you used within the input element of the form (instead of uploadfile, which I used).
See this github link for where I found my reference. Postman helped me duplicate this in PHP.
$sid = '_sid=[YOURSID]';
$url = 'HOSTNAME/webapi/entry.cgi?' . $sid;
$SynologySharedPath = 'FILEPATH';
$params = array(
'api' => 'SYNO.FileStation.Upload',
'version' => '2',
'method' => 'upload',
'path' => $SynologySharedPath,
'create_parents' => 'true',
'overwrite' => 'true',
'file' => new \CurlFile($_FILES["uploadfile"]["tmp_name"], $_FILES["uploadfile"]["type"], $_FILES['uploadfile']['name'])
);
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_POST,1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $params);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_VERBOSE,true);
$result = curl_exec ($ch);
$curlresponse = json_decode($result, true);