Curl PHP errors with rackspace api - php

Question

I'm trying to generate a token with the "Cloud Identity" API from Rackspace(https://developer.rackspace.com/docs/cloud-identity/v2/developer-guide/#generate-an-authentication-token)
This is the request i need:
$ curl https://identity.api.rackspacecloud.com/v2.0/tokens \
-X POST \
-d '{"auth":{"RAX-KSKEY:apiKeyCredentials":{"username":"yourUserName","apiKey":"yourPassword"}}}' \
-H "Content-type: application/json" | python -m json.tool
And this is how I'm trying to do it:
<?php
$url = 'https://identity.api.rackspacecloud.com/v2.0/tokens';
$apiKey = 'XXXXXXXXXXXXXXXXXXXXXXXXXXXXX';
$data = "'{\"auth\":{\"RAX-KSKEY:apiKeyCredentials\":{\"username\":\"XXXXXXXX\",\"apiKey\":\"$apiKey\"}}}'";
$headers = array();
$headers[0] = '"Content-Type: application/json" | python -m json.tool';
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 20);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_NONE);
$response = curl_exec($ch);
$info = curl_getinfo($ch, CURLINFO_HTTP_CODE);
echo($info);
?>
And I get this: 415 {"unsupportedMediaType":{"code":415}}
When I change the header from
$headers[0] = '"Content-Type: application/json" | python -m json.tool';
to
$headers[0] = 'Content-Type: application/json | python -m json.tool';
I get this
And finally when I change the header to this one:
$headers[0] = 'Content-Type: application/json';
i get this error code: 400 {"badRequest":{"code":400,"message":"Invalid json request body"}}
Am I doing it right?
Thanks in advance.

Answer 1

Is there any reason why you're not using the PHP SDK? It makes doing things like this a lot easier.
You'd need to change your PHP to:
<?php
$url = 'https://identity.api.rackspacecloud.com/v2.0/tokens';
$username = 'foo';
$apiKey = 'bar';
$data = <<<EOT
{"auth": {"RAX-KSKEY:apiKeyCredentials":{"username":"$username","apiKey":"$apiKey"}}}
EOT;
$headers = array('Content-Type: application/json');
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_HEADER, false);
curl_setopt($ch, CURLOPT_CUSTOMREQUEST, 'POST');
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 20);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($ch, CURLOPT_HTTP_VERSION, CURL_HTTP_VERSION_NONE);
$response = curl_exec($ch);
echo curl_getinfo($ch, CURLINFO_HTTP_CODE);