Arduino Uno - WebService (AzureML) - web-services

Question

I'd like to connect to an AzureML Web Service. I have looked into the POST Method on the Arduino Homepage and also here https://iotguys.wordpress.com/2014/12/25/communicating-with-microsoft-azure-eventhub-using-arduino/
Here is my Setup method:
void setup()
{
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect.
}
Serial.println("ethernet");
if (Ethernet.begin(mac) == 0) {
Serial.println("ethernet failed");
for (;;) ;
}
// give the Ethernet shield a second to initialize:
delay(1000);
}
The Post Method is based on this: http://playground.arduino.cc/Code/WebClient
I just added sprintf(outBuf, "Authorization: Bearer %s\r\n", api_key); to the header, with char* api_key = "the ML Web Service API KEY"
Also, unlike specified in the WebClient I use the whole WebService URI as url and do not specify a page name.
This doesn't work.
The Network to which I am connecting has Internet Access.
What am I doing wrong?

Answer 1

Machine Learning Studio services that you create needs to receive requests from a device that has SSL capabilities to perform HTTPS requests. AFAIK, Arduino doesn't support SSL capabilities.
One usual scenario is to attach the Arduino to a third device like Raspberry Pi 2 etc to use it as a gateway and do the call from the Pi itself.
Here's a sample project from Microsoft Open Technologies team that utilizes Arduino Uno, Raspberry pi and Azure stuff.
Hope this helps!