Add read node example (#96)

Samples/Go/readNode.go

@@ -0,0 +1,66 @@
+package main
+
+import (
+	"encoding/json"
+	"fmt"
+	"log"
+
+	"github.com/mrxinu/gosolar"
+)
+
+func main() {
+	var err error
+
+	// define your connection parameters
+	hostname := "localhost"
+	username := ""
+	password := ""
+
+	// create a new gosolar client
+	c := gosolar.NewClient(hostname, username, password, true)
+
+	// get the first URI from the Orion.Nodes entity
+	var res []byte
+	res, err = c.Query("SELECT TOP 1 URI FROM Orion.Nodes", nil)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	// create a structure to hold the results
+	var nodes []struct {
+		URI string
+	}
+
+	// convert the results from JSON
+	if err = json.Unmarshal(res, &nodes); err != nil {
+		log.Fatal(err)
+	}
+
+	// get the single URI from the first return
+	singleURI := nodes[0].URI
+
+	var nodeData []byte
+	nodeData, err = c.Read(singleURI)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	// create a structure with as much of the node data as you need
+	var nodeDetail struct {
+		Caption     string
+		Vendor      string
+		MachineType string
+		Status      int
+	}
+
+	// convert the results from JSON
+	if err := json.Unmarshal(nodeData, &nodeDetail); err != nil {
+		log.Fatal(err)
+	}
+
+	// print the results
+	fmt.Printf("Caption: %v\n", nodeDetail.Caption)
+	fmt.Printf("Vendor: %v\n", nodeDetail.Vendor)
+	fmt.Printf("MachineType: %v\n", nodeDetail.MachineType)
+	fmt.Printf("Status: %v\n", nodeDetail.Status)
+}