Use Dropbox API with CodeIgniter - codeigniter

Question

Trying to reuse the following Dropbox API code within CodeIgniter. The issue is getting it to work within the constraints of class methods & constuctors:
require_once('../dropbox-sdk-1.1.4/Dropbox/autoload.php');
use \Dropbox as dbx;
$accessToken = 'DROPBOX_ACCESSTOKEN';
$dbxClient = new dbx\Client($accessToken, "PHP-Example/1.0");
Needs to be something like the following, but doesn't like the 'use \Dropbox as dbx' line, amongst others:
class Controller_name extends CI_Controller
{
public function __construct()
{
parent::__construct();
require_once('../dropbox-sdk-1.1.4/Dropbox/autoload.php');
use \Dropbox as dbx;
}
public function access_dropbox()
{
$accessToken = 'DROPBOX_ACCESSTOKEN';
$dbxClient = new dbx\Client($accessToken, "PHP-Example/1.0");
$file = 'file.txt';
$f = fopen( $file, "rb" );
$result = $dbxClient->uploadFile( "/$file", dbx\WriteMode::add(), $f);
fclose($f);
}
}
Using the code below I'm getting the following error message:
An uncaught Exception was encountered
Type: Kunnu\Dropbox\Exceptions\DropboxClientException
Message: Error in call to API function "files/upload": HTTP header
"Dropbox-API-Arg": path: 'db_backup' did not match pattern
'(/(.|[\r\n]))|(ns:[0-9]+(/.)?)|(id:.*)'
Filename:
/opt/lampp/htdocs/codeig-smythes/vendor/kunalvarma05/dropbox-php-sdk/src/Dropbox/Http/Clients/DropboxGuzzleHttpClient.php
Line Number: 59
$file_path = 'public/sql_backup/db_backup_' .date("Y-m-d"). '.sql';
require_once('../vendor/autoload.php');
$app = new Kunnu\Dropbox\DropboxApp(
'APP_KEY',
'APP_SECRET',
'ACCESS_TOKEN'
);
$dropbox = new Kunnu\Dropbox\Dropbox($app);
$dropboxFile = new Kunnu\Dropbox\DropboxFile(realpath($file_path));
$file = $dropbox->upload(
$dropboxFile, basename($file_path), array('autorename' => TRUE)
);

Answer 1

Working with the dropbox API is pretty easy. I use a package found on github:
https://github.com/kunalvarma05/dropbox-php-sdk
I am not using CodeIgniter 3's composer autoload feature. Also, my vendor directory is located at FCPATH.
Since it looks like you want to upload a file, I'll show you that example:
$appKey = '77fgftsb77joj77';
$appSecret = 'fw77777tspam5y';
$accessToken = 'PMP7777777AAAAAAADFC_6JI7777777hY8xYhO7777777MJkpCKbBv';
if( is_file( $file_path ) )
{
$file_path = realpath( $file_path );
$file_name = basename( $file_path );
require FCPATH . 'vendor/autoload.php';
$app = new Kunnu\Dropbox\DropboxApp(
$appKey,
$appSecret,
$accessToken
);
$dropbox = new Kunnu\Dropbox\Dropbox($app);
$dropboxFile = new Kunnu\Dropbox\DropboxFile(
$file_path
);
$file = $dropbox->upload(
$dropboxFile,
'/backups/website/' . $file_name,
[
'autorename' => TRUE
]
);
}