Added in support for a remote SFTP server to be included in the output object configuration.
The #USERNAME# placeholder will be replaced in the endpoint and username parts of the configuration in addition to the prefix area (which is the main one needed if you want per-user folders on the remote SFTP server) along with the additional_data field.
You can also optionally use #PASSWORD# for the payload area and if it's detected it will automatically replace the placeholder with the same password the user is logging in with, rather than using a hardcoded value from the configuration.php file. I'm not really sure how common that use case would be (where someone needs their own username and password info to be used when connecting to the remote SFTP server) but I figured it might be useful to someone so I included it.
Below is an example connection-specific output object that has most everything in place you would need to get started with a remote SFTP proxy setup in your configuration.php file.
$connection_output_objects['example'] = [
'status' => 1,
'username' => '',
'expiration_date' => 0,
'home_dir' => '',
'uid' => 0,
'gid' => 0,
'max_sessions' => 0,
'quota_size' => 0,
'quota_files' => 100000,
'permissions' => [
"/" => ["*"],
],
'upload_bandwidth' => 0,
'download_bandwidth' => 0,
'filters' => [
'allowed_ip' => [],
'denied_ip' => [],
],
'public_keys' => [],
'filesystem' => [
'provider' => 5,
'sftpconfig' => [
'endpoint' => 'remote-sftp.example.com:22',
'username' => 'remote_username',
'password' => [
'status' => 'Plain',
'payload' => 'remote_password',
'key' => '',
'additional_data' => '#USERNAME#'
],
'private_key' => null,
'fingerprints' => [
'SHA256:<LONG_FINGERPRINT_VALUE_HERE>',
],
'prefix' => '/remote/path/home/example/#USERNAME#'
]
],
];