Sensor data keep-alives

app.ino

void sendData(unsigned long timestamp, double speed) 
{   
    char body[64];
    int success = 1;

    // If we're not connected, open the connection.
    if(!client.connected())
    {
        success = client.connect(SERVER, SERVERPORT);
    }

    if(success)
    {
        // Empty the buffer 
        // (I still don't really care about the response)
        while(client.read() != -1);
        
        memset(body, 0, 64);

        sprintf(body, "milliseconds=%lu&speed=", timestamp); 
        dtostrf(speed, 2, 3, &body[strlen(body)]);

        int bodyLength = strlen(body);

        client.println("POST /data/providereading HTTP/1.1");
        
        client.print("Host: ");
        client.print(SERVER);
        client.print(":");
        client.println(SERVERPORT);

        // This tells the server we want to leave the 
        // connection open.
        client.println("Connection: keep-alive");

        client.print("Content-Length: ");
        client.println(bodyLength);
        client.println("Content-Type: application/x-www-form-urlencoded");
        client.println();

        client.print(body);
    }
}