Script to upload tweetbot images to Rackspace's Cloud Files CDN and then tweet the URL. Special thanks to Scott Smith, Jesse Noller and Mikey Salazar.

tweetbot_upload_rax.php

<?php
require 'vendor/autoload.php'; //requires composer, for more information visit developer.rackspace.com
use OpenCloud\Rackspace;

// Instantiate a Rackspace client.
$client = new Rackspace(Rackspace::US_IDENTITY_ENDPOINT, array(
    'username' => 'XXX',
    'apiKey'   => 'XXX'
));

// 2. Obtain an Object Store service object from the client.
$region = 'DFW'; // change this to the region where your container is
$objectStoreService = $client->objectStoreService(null, $region);

// 3. Get container.
$container = $objectStoreService->getContainer('SET CONTAINER NAME');

// 4. Generate Random File Name
$seed = str_split('abcdefghijklmnopqrstuvwxyz'
                 .'ABCDEFGHIJKLMNOPQRSTUVWXYZ'
                 .'0123456789');
shuffle($seed); // probably optional since array_is randomized; this may be redundant
$rand = '';
foreach (array_rand($seed, 5) as $k) $rand .= $seed[$k];

$path = $_FILES['media']['name'];
$ext = pathinfo($path, PATHINFO_EXTENSION); //Grab original extension

// 5. Upload an object to the container.
$localfile = $_FILES['media']['tmp_name'];
$remoteFileName = $rand . "." . $ext;

$fileData = fopen($localfile, 'r');
$container->uploadObject($remoteFileName, $fileData);

// Note that while we call fopen to open the file resource, we do not call fclose at the end.
// The file resource is automatically closed inside the uploadObject call.

$outputFilename = 'http://img.domain.com/' . basename($remoteFileName); //Remember: to use a custom URL, you must setup a CNAME to point to your CDN URL


$response = array(url=>$outputFilename);


echo json_encode($response);

?>