Implement support for fetching hddtemp data (#1411)

plugins/inputs/hddtemp/go-hddtemp/hddtemp.go

@@ -0,0 +1,61 @@
+package hddtemp
+
+import (
+	"bytes"
+	"io"
+	"net"
+	"strconv"
+	"strings"
+)
+
+type disk struct {
+	DeviceName  string
+	Model       string
+	Temperature int32
+	Unit        string
+	Status      string
+}
+
+func Fetch(address string) ([]disk, error) {
+	var (
+		err    error
+		conn   net.Conn
+		buffer bytes.Buffer
+		disks  []disk
+	)
+
+	if conn, err = net.Dial("tcp", address); err != nil {
+		return nil, err
+	}
+
+	if _, err = io.Copy(&buffer, conn); err != nil {
+		return nil, err
+	}
+
+	fields := strings.Split(buffer.String(), "|")
+
+	for index := 0; index < len(fields)/5; index++ {
+		status := ""
+		offset := index * 5
+		device := fields[offset+1]
+		device = device[strings.LastIndex(device, "/")+1:]
+
+		temperatureField := fields[offset+3]
+		temperature, err := strconv.ParseInt(temperatureField, 10, 32)
+
+		if err != nil {
+			temperature = 0
+			status = temperatureField
+		}
+
+		disks = append(disks, disk{
+			DeviceName:  device,
+			Model:       fields[offset+2],
+			Temperature: int32(temperature),
+			Unit:        fields[offset+4],
+			Status:      status,
+		})
+	}
+
+	return disks, nil
+}