support looking up device by name

Author: wg

src/github.com/kentik/libkflow/api/client.go

@@ -30,8 +30,16 @@ func NewClient(email, token string, timeout time.Duration) *Client {
 	}
 }
 
-func (c *Client) GetDevice(url string, did int) (*Device, error) {
-	r, err := c.do("GET", fmt.Sprintf("%s/device/%d", url, did), nil)
+func (c *Client) GetDeviceByID(url string, did int) (*Device, error) {
+	return c.getdevice(fmt.Sprintf("%s/device/%d", url, did))
+}
+
+func (c *Client) GetDeviceByName(url string, name string) (*Device, error) {
+	return c.getdevice(fmt.Sprintf("%s/device/%s", url, name))
+}
+
+func (c *Client) getdevice(url string) (*Device, error) {
+	r, err := c.do("GET", url, nil)
 	if err != nil {
 		return nil, err
 	}

src/github.com/kentik/libkflow/api/client_test.go

@@ -7,14 +7,27 @@ import (
 	"github.com/stretchr/testify/assert"
 )
 
-func TestGetDevice(t *testing.T) {
+func TestGetDeviceByID(t *testing.T) {
 	client, server, device, err := test.NewClientServer()
 	if err != nil {
 		t.Fatal(err)
 	}
 	assert := assert.New(t)
 
-	device2, err := client.GetDevice(server.URL()+"/api/v5", device.ID)
+	device2, err := client.GetDeviceByID(server.URL()+"/api/v5", device.ID)
+
+	assert.NoError(err)
+	assert.EqualValues(device, device2)
+}
+
+func TestGetDeviceByName(t *testing.T) {
+	client, server, device, err := test.NewClientServer()
+	if err != nil {
+		t.Fatal(err)
+	}
+	assert := assert.New(t)
+
+	device2, err := client.GetDeviceByName(server.URL()+"/api/v5", device.Name)
 
 	assert.NoError(err)
 	assert.EqualValues(device, device2)

src/github.com/kentik/libkflow/api/test/server.go

@@ -16,6 +16,7 @@ import (
 	"net/http"
 	"os"
 	"strconv"
+	"strings"
 	"time"
 
 	"github.com/kentik/libkflow/api"
@@ -85,19 +86,14 @@ func (s *Server) Flows() <-chan chf.PackedCHF {
 }
 
 func (s *Server) device(w http.ResponseWriter, r *http.Request) {
-	var did int
+	id := strings.Split(r.URL.Path, "/")[4]
 
-	n, err := fmt.Sscanf(r.URL.Path, "/api/v5/device/%d", &did)
-	if n != 1 || err != nil {
-		panic(http.StatusBadRequest)
-	}
-
-	if did != s.Device.ID {
+	if id != strconv.Itoa(s.Device.ID) && id != s.Device.Name {
 		panic(http.StatusNotFound)
 	}
 
 	w.Header().Set("Content-Type", "application/json")
-	err = json.NewEncoder(w).Encode(&api.DeviceResponse{
+	err := json.NewEncoder(w).Encode(&api.DeviceResponse{
 		Device: s.Device,
 	})
 

src/github.com/kentik/libkflow/main.go

@@ -29,10 +29,18 @@ func kflowInit(cfg *C.kflowConfig) C.int {
 		email   = C.GoString(cfg.API.email)
 		token   = C.GoString(cfg.API.token)
 		timeout = time.Duration(cfg.timeout) * time.Millisecond
+		device  *api.Device
 	)
 
 	client := api.NewClient(email, token, timeout)
-	device, err := client.GetDevice(C.GoString(cfg.API.URL), int(cfg.device_id))
+
+	switch url := C.GoString(cfg.API.URL); {
+	case cfg.device_id > 0:
+		device, err = client.GetDeviceByID(url, int(cfg.device_id))
+	case cfg.hostname != nil:
+		device, err = client.GetDeviceByName(url, C.GoString(cfg.hostname))
+	}
+
 	if err != nil {
 		errors <- err
 		return C.EKFLOWCONFIG