I believe the problem was that step 2 of the "create a new token" workflow, defined on https://one.ubuntu.com/developer/account_admin/issue_tokens/cloud/, was failing with a 503 for you because the service was down at a couple of points this weekend. You'll need to trap this situation and deal with it (a 503 indicates that you should retry the request later, as per standard HTTP).

I've tested the below PHP (beware: I am not a PHP hacker, so it might not be the most idiomatic code) and it works fine for me. It goes through three steps:

1. Create a new token in Ubuntu SSO (login.ubuntu.com) (API docs)


2. Tell Ubuntu One about that new token (API docs)


3. Use that new token to sign a request to the Ubuntu One files API (API docs)

You'll see the individual parts commented below. Remember that this requests and gets a brand new token; once you have the token (after step 2), save it somewhere; don't request a new one every time.

<?php

function curlPetition($arr){

    $curl = curl_init($arr['URL']);

    if($arr['USERPWD']){curl_setopt($curl, CURLOPT_USERPWD, $arr['USERPWD']);}  

    curl_setopt($curl,CURLOPT_SSL_VERIFYPEER,FALSE);

    curl_setopt($curl,CURLOPT_SSL_VERIFYHOST,2);

    curl_setopt($curl,CURLOPT_RETURNTRANSFER,true);

    $out = curl_exec($curl);

    curl_close($curl);

    $data['responseBody'] = $out;

    return $data;

}



/* Define username and password details */

$email_address = '[email protected]';

$password = 'MY PASSWORD';



/* Step 1: Get a new OAuth token from Ubuntu Single-Sign-On */

$url = 'https://login.ubuntu.com/api/1.0/authentications?ws.op=authenticate&token_name=Ubuntu%20One%20@%20try1';

$data = curlPetition(array('URL'=>$url,'USERPWD'=> $email_address.':'.$password));

$tokenA = json_decode($data['responseBody'],1);



/* Set up that new token for use in OAuth requests */

$conskey = $tokenA['consumer_key'];

$conssec = $tokenA['consumer_secret'];

$token = $tokenA['token'];

$secret = $tokenA['token_secret'];

$oauth = new OAuth($conskey,$conssec,OAUTH_SIG_METHOD_HMACSHA1,OAUTH_AUTH_TYPE_URI);

$oauth->enableDebug();

$oauth->enableSSLChecks();

$oauth->setToken($token,$secret);



/* Step 2: tell Ubuntu One about the new token (signed with the token itself) */

$tell_u1_about_token_url = 'https://one.ubuntu.com/oauth/sso-finished-so-get-tokens/' . $email_address;

$oauth->fetch($tell_u1_about_token_url);

print_r($oauth->getLastResponse());



/* Step 3: use the token to make a request to the Files API */

$api_url = 'https://one.ubuntu.com/api/file_storage/v1/';

$oauth->fetch($api_url.'~/Ubuntu%20One/');

print_r($oauth->getLastResponse());

?>