Converting Rackspace Cloud Files CDN URLs from HTTP to HTTPS - php

Question

I have a series of Rackspace Cloud Files CDN URLs stored which reference an HTTP address and I would like to convert them to the HTTPS equivalent.
Rackspace Cloud Files CDN URLs are in the following format:
http://c186397.r97.cf1.rackcdn.com/CloudFiles Akamai.pdf
And the SSL equivalent for this URL would be:
https://c186397.ssl.cf1.rackcdn.com/CloudFiles Akamai.pdf
The changes to the URL are (source):
HTTP becomes HTTPS
The second URI segment ('r97' in this example) becomes 'ssl'
The 'r00' part seems to vary in length (as some are 'r6' etc.) so I'm having trouble converting these URLs to HTTPS. Here's the code I have so far:
function rackspace_cloud_http_to_https($url)
{
//Replace the HTTP part with HTTPS
$url = str_replace("http", "https", $url, $count = 1);
//Get the position of the .r00 segment
$pos = strpos($url, '.r');
if ($pos === FALSE)
{
//Not present in the URL
return FALSE;
}
//Get the .r00 part to replace
$replace = substr($url, $pos, 4);
//Replace it with .ssl
$url = str_replace($replace, ".ssl", $url, $count = 1);
return $url;
}
This however does not work for URLs where the second segment is of a different length.
Any thoughts appreciated.

Answer 1

I know this is old, but if you are using this library: https://github.com/rackspace/php-opencloud you can use the getPublicUrl() method on the object, you just need to use the following namespace
use OpenCloud\ObjectStore\Constants as Constant;
// Code logic to upload file
$https_file_url = $response->getPublicUrl(Constant\UrlType::SSL);

Answer 2

Try this:
function rackspace_cloud_http_to_https($url)
{
$urlparts = explode('.', $url);
// check for presence of 'r' segment
if (preg_match('/r\d+/', $urlparts[1]))
{
// replace appropriate segments of url
$urlparts[0] = str_replace("http", "https", $urlparts[0]);
$urlparts[1] = 'ssl';
// put url back together
$url = implode('.', $urlparts);
return $url;
}
else
{
return false;
}
}