Microsoft Translator Text API doesn't work - api

Question

I want to use Microsoft Translator API but I am unable to use it.
I created a Microsoft Azure account as specified in the documentation (http://docs.microsofttranslator.com/text-translate.html) and I created a resource.
When I call the web service to get an access toke, every time I get an exception because a time out..
This is my code (it's Apex, similar to Java) :
Http h = new Http();
HttpRequest req = new HttpRequest();
req.setMethod('POST');
req.setHeader('Content-Length', '3495');
req.setEndpoint('https://api.cognitive.microsoft.com/sts/v1.0/issueToken?Subscription-Key=[myAPIKey]');
req.setTimeout(20000);
HttpResponse res = h.send(req);
If I remove my API key or I the content length from the header, I get an error from Microsoft.
Do you know why I get this?
Thanks

Answer 1

You should replace [myAPIKey] with the right key. You can get it through https://www.microsoft.com/cognitive-services
EDIT
The answer above is related to GET operations. For POST, you should include the 'Ocp-Apim-Subscription-Key' header:
Http h = new Http();
HttpRequest req = new HttpRequest();
req.setMethod('POST');
req.setHeader('Content-Length', '3495');
req.setHeader('Ocp-Apim-Subscription-Key', '[INSERT_HERE_YOUR_TOKEN]');
req.setEndpoint('https://api.cognitive.microsoft.com/sts/v1.0/issueToken');
req.setTimeout(20000);
HttpResponse res = h.send(req);

Answer 2

It works fin now.
I edit my code and it is ok :
HttpRequest req = new HttpRequest();
req.setMethod('GET');
req.setEndpoint(theURL);
req.setHeader('Content-Type','application/xml');
Http binding = new Http();
HttpResponse res = binding.send(req);
Thanks