How to open a URL with Spark Core?

Firmware
3

The code below has been very reliable for me:

void sendGetRequest(const char * server, const char * url)
{
    if (myTCP.connect(server, 80)) {
        myTCP.print("GET ");
        myTCP.print(url);
        myTCP.println(" HTTP/1.0");
        myTCP.println("Connection: close");
        myTCP.print("Host: ");
        myTCP.println(server);
        myTCP.println("Accept: text/html, text/plain");
        myTCP.println();
        myTCP.flush();
    } 
}
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