PHPBrowser Hidden API method "_loadPage" is not following 301 Redirects - redirect

Question

I am writing a test with PHPBowser, in Codeception v2.2.11 that uses the hidden API method of _loadpage.
I have added this into my \Helper\Api as follows:
public function loadpage($link)
{
$this->getModule('PhpBrowser')->_loadPage('POST', $link);
}
And call it in an Api Codeception test, as follows:
$link = 'http://www.fiercebiotech.com/contact';
$I->loadpage($link);
The issue I am facing is that when using _loadpage, it does not follow redirects. This exampled link when finally resolved is 301 redirected to:
http://www.fiercebiotech.com/contact-us.
Here is the header response console output when _loadpage opens $link.
I loadpage "http://www.fiercebiotech.com/contact"
[Request Headers] []
[Page] http://www.fiercebiotech.com/contact
[Response] 404
I need help getting _loadpage to not stop at ~/contact but follow the 301 redirect to ~/contact-us, so I can get the output header response to be
[page] http://www.fiercebiotech.com/contact-us
[response] 200
Currently I cant get _loadpage to follow 301 redirects. Anyone out there have success doing so?
Ive attempted to use Codeception REST function startFollowingRedirects and adding allow_redirects: true as follows, but neither technique seems to work (as the redirect is not followed).
class_name: ApiTester
modules:
enabled:
- WebDriver:
url: ''
browser: 'chrome'
window_size: 1200x993
clear_cookies: true
allow_redirects: true
- \Helper\Acceptance
- REST:
url: 'host'
depends: PhpBrowser
allow_redirects: true
- \Helper\Api

Answer 1

I found the solution to my issue:
The issue began with, as I suspected is that _loadpage does not follow redirects, it only loads the page requested and stops. In this case '~/contact-us', ignoring the fact that the page gets redirected to (with a 301) to '~/contact-us'.
I cant simply load the page (via _loadpage)
Get the header response
and assume that I will be getting the header response of the redirected URL
I will only get the header response of the original URL.
The Solution:
I have to in my foreach loop:
Go to the URL
send a GET
Grab the HTTP Header
Assert that the HTTP header has a 200OK response
Solution - As it is in Codeception code:
public function Validate_httpStatus_mainNav($mainNavLocator)
{
//Used to test main navigation -- 404 tests
$I = $this;
$mainNavLinks = $I->grabMultiple($mainNavLocator, 'href');
codecept_debug($mainNavLinks);
foreach ($mainNavLinks as $link) {
$I->amOnUrl($link);
$I->sendGET($link);
$I->grabHttpHeader($link);
$I->canSeeResponseCodeIs(HttpCode::OK);
}
}