Use new method.

cmd/cloudcfg/cloudcfg.go

@@ -151,11 +151,11 @@ func executeAPIRequest(method string, auth *kube_client.AuthInfo) bool {
 	r := s.Verb(verb).
 		Path("api/v1beta1").
 		Path(parseStorage()).
-		Selector(*selector)
+		ParseSelector(*selector)
 	if method == "create" || method == "update" {
 		r.Body(readConfig(parseStorage()))
 	}
-	obj, err := r.Do()
+	obj, err := r.Do().Get()
 	if err != nil {
 		log.Fatalf("Got request error: %v\n", err)
 		return false

pkg/client/client.go

@@ -17,23 +17,20 @@ limitations under the License.
 package client
 
 import (
-	"bytes"
 	"crypto/tls"
-	"encoding/json"
 	"fmt"
 	"io"
 	"io/ioutil"
 	"log"
 	"net/http"
-	"net/url"
-	"strings"
 
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/labels"
 )
 
 // ClientInterface holds the methods for clients of Kubenetes, an interface to allow mock testing
 type ClientInterface interface {
-	ListPods(selector map[string]string) (api.PodList, error)
+	ListPods(selector labels.Selector) (api.PodList, error)
 	GetPod(name string) (api.Pod, error)
 	DeletePod(name string) error
 	CreatePod(api.Pod) (api.Pod, error)
@@ -123,143 +120,79 @@ func (c *Client) rawRequest(method, path string, requestBody io.Reader, target i
 	return body, err
 }
 
-func (client Client) makeURL(path string) string {
+func (client *Client) makeURL(path string) string {
 	return client.host + "/api/v1beta1/" + path
 }
 
-// EncodeSelector transforms a selector expressed as a key/value map, into a
-// comma separated, key=value encoding.
-func EncodeSelector(selector map[string]string) string {
-	parts := make([]string, 0, len(selector))
-	for key, value := range selector {
-		parts = append(parts, key+"="+value)
-	}
-	return url.QueryEscape(strings.Join(parts, ","))
-}
-
-// DecodeSelector transforms a selector from a comma separated, key=value format into
-// a key/value map.
-func DecodeSelector(selector string) map[string]string {
-	result := map[string]string{}
-	if len(selector) == 0 {
-		return result
-	}
-	parts := strings.Split(selector, ",")
-	for _, part := range parts {
-		pieces := strings.Split(part, "=")
-		if len(pieces) == 2 {
-			result[pieces[0]] = pieces[1]
-		} else {
-			log.Printf("Invalid selector: %s", selector)
-		}
-	}
-	return result
-}
-
 // ListPods takes a selector, and returns the list of pods that match that selector
-func (client Client) ListPods(selector map[string]string) (api.PodList, error) {
-	path := "pods"
-	if selector != nil && len(selector) > 0 {
-		path += "?labels=" + EncodeSelector(selector)
-	}
-	var result api.PodList
-	_, err := client.rawRequest("GET", path, nil, &result)
-	return result, err
+func (client *Client) ListPods(selector labels.Selector) (result api.PodList, err error) {
+	err = client.Get().Path("pods").Selector(selector).Do().Into(&result)
+	return
 }
 
 // GetPod takes the name of the pod, and returns the corresponding Pod object, and an error if it occurs
-func (client Client) GetPod(name string) (api.Pod, error) {
-	var result api.Pod
-	_, err := client.rawRequest("GET", "pods/"+name, nil, &result)
-	return result, err
+func (client *Client) GetPod(name string) (result api.Pod, err error) {
+	err = client.Get().Path("pods").Path(name).Do().Into(&result)
+	return
 }
 
 // DeletePod takes the name of the pod, and returns an error if one occurs
-func (client Client) DeletePod(name string) error {
-	_, err := client.rawRequest("DELETE", "pods/"+name, nil, nil)
-	return err
+func (client *Client) DeletePod(name string) error {
+	return client.Delete().Path("pods").Path(name).Do().Error()
 }
 
 // CreatePod takes the representation of a pod.  Returns the server's representation of the pod, and an error, if it occurs
-func (client Client) CreatePod(pod api.Pod) (api.Pod, error) {
-	var result api.Pod
-	body, err := json.Marshal(pod)
-	if err == nil {
-		_, err = client.rawRequest("POST", "pods", bytes.NewBuffer(body), &result)
-	}
-	return result, err
+func (client *Client) CreatePod(pod api.Pod) (result api.Pod, err error) {
+	err = client.Post().Path("pods").Body(pod).Do().Into(&result)
+	return
 }
 
 // UpdatePod takes the representation of a pod to update.  Returns the server's representation of the pod, and an error, if it occurs
-func (client Client) UpdatePod(pod api.Pod) (api.Pod, error) {
-	var result api.Pod
-	body, err := json.Marshal(pod)
-	if err == nil {
-		_, err = client.rawRequest("PUT", "pods/"+pod.ID, bytes.NewBuffer(body), &result)
-	}
-	return result, err
+func (client *Client) UpdatePod(pod api.Pod) (result api.Pod, err error) {
+	err = client.Put().Path("pods").Path(pod.ID).Body(pod).Do().Into(&result)
+	return
 }
 
 // GetReplicationController returns information about a particular replication controller
-func (client Client) GetReplicationController(name string) (api.ReplicationController, error) {
-	var result api.ReplicationController
-	_, err := client.rawRequest("GET", "replicationControllers/"+name, nil, &result)
-	return result, err
+func (client *Client) GetReplicationController(name string) (result api.ReplicationController, err error) {
+	err = client.Get().Path("replicationControllers").Path(name).Do().Into(&result)
+	return
 }
 
 // CreateReplicationController creates a new replication controller
-func (client Client) CreateReplicationController(controller api.ReplicationController) (api.ReplicationController, error) {
-	var result api.ReplicationController
-	body, err := json.Marshal(controller)
-	if err == nil {
-		_, err = client.rawRequest("POST", "replicationControllers", bytes.NewBuffer(body), &result)
-	}
-	return result, err
+func (client *Client) CreateReplicationController(controller api.ReplicationController) (result api.ReplicationController, err error) {
+	err = client.Post().Path("replicationControllers").Body(controller).Do().Into(&result)
+	return
 }
 
 // UpdateReplicationController updates an existing replication controller
-func (client Client) UpdateReplicationController(controller api.ReplicationController) (api.ReplicationController, error) {
-	var result api.ReplicationController
-	body, err := json.Marshal(controller)
-	if err == nil {
-		_, err = client.rawRequest("PUT", "replicationControllers/"+controller.ID, bytes.NewBuffer(body), &result)
-	}
-	return result, err
+func (client *Client) UpdateReplicationController(controller api.ReplicationController) (result api.ReplicationController, err error) {
+	err = client.Put().Path("replicationControllers").Path(controller.ID).Body(controller).Do().Into(&result)
+	return
 }
 
-func (client Client) DeleteReplicationController(name string) error {
-	_, err := client.rawRequest("DELETE", "replicationControllers/"+name, nil, nil)
-	return err
+func (client *Client) DeleteReplicationController(name string) error {
+	return client.Delete().Path("replicationControllers").Path(name).Do().Error()
 }
 
 // GetReplicationController returns information about a particular replication controller
-func (client Client) GetService(name string) (api.Service, error) {
-	var result api.Service
-	_, err := client.rawRequest("GET", "services/"+name, nil, &result)
-	return result, err
+func (client *Client) GetService(name string) (result api.Service, err error) {
+	err = client.Get().Path("services").Path(name).Do().Into(&result)
+	return
 }
 
 // CreateReplicationController creates a new replication controller
-func (client Client) CreateService(svc api.Service) (api.Service, error) {
-	var result api.Service
-	body, err := json.Marshal(svc)
-	if err == nil {
-		_, err = client.rawRequest("POST", "services", bytes.NewBuffer(body), &result)
-	}
-	return result, err
+func (client *Client) CreateService(svc api.Service) (result api.Service, err error) {
+	err = client.Post().Path("services").Body(svc).Do().Into(&result)
+	return
 }
 
 // UpdateReplicationController updates an existing replication controller
-func (client Client) UpdateService(svc api.Service) (api.Service, error) {
-	var result api.Service
-	body, err := json.Marshal(svc)
-	if err == nil {
-		_, err = client.rawRequest("PUT", "services/"+svc.ID, bytes.NewBuffer(body), &result)
-	}
-	return result, err
+func (client *Client) UpdateService(svc api.Service) (result api.Service, err error) {
+	err = client.Put().Path("services").Path(svc.ID).Body(svc).Do().Into(&result)
+	return
 }
 
-func (client Client) DeleteService(name string) error {
-	_, err := client.rawRequest("DELETE", "services/"+name, nil, nil)
-	return err
+func (client *Client) DeleteService(name string) error {
+	return client.Delete().Path("services").Path(name).Do().Error()
 }

pkg/client/client_test.go

@@ -17,7 +17,6 @@ limitations under the License.
 package client
 
 import (
-	"encoding/json"
 	"net/http"
 	"net/http/httptest"
 	"net/url"
@@ -96,7 +95,7 @@ func TestListPodsLabels(t *testing.T) {
 	}
 	c.Setup()
 	c.QueryValidator["labels"] = validateLabels
-	selector := map[string]string{"foo": "bar", "name": "baz"}
+	selector := labels.Set{"foo": "bar", "name": "baz"}.AsSelector()
 	receivedPodList, err := c.ListPods(selector)
 	c.Validate(t, receivedPodList, err)
 }
@@ -260,7 +259,7 @@ func TestCreateController(t *testing.T) {
 
 func body(obj interface{}, raw *string) *string {
 	if obj != nil {
-		bs, _ := json.Marshal(obj)
+		bs, _ := api.Encode(obj)
 		body := string(bs)
 		return &body
 	}

pkg/client/request.go

@@ -34,7 +34,6 @@ import (
 // auth, err := LoadAuth(filename)
 // c := New(url, auth)
 // resp, err := c.Verb("GET").
-//	Path("api/v1beta1").
 //	Path("pods").
 //	Selector("area=staging").
 //	Timeout(10*time.Second).
@@ -46,17 +45,39 @@ func (c *Client) Verb(verb string) *Request {
 	return &Request{
 		verb: verb,
 		c:    c,
-		path: "/",
+		path: "/api/v1beta1",
 	}
 }
 
+// Begin a POST request.
+func (c *Client) Post() *Request {
+	return c.Verb("POST")
+}
+
+// Begin a PUT request.
+func (c *Client) Put() *Request {
+	return c.Verb("PUT")
+}
+
+// Begin a GET request.
+func (c *Client) Get() *Request {
+	return c.Verb("GET")
+}
+
+// Begin a DELETE request.
+func (c *Client) Delete() *Request {
+	return c.Verb("DELETE")
+}
+
 // Request allows for building up a request to a server in a chained fashion.
+// Any errors are stored until the end of your call, so you only have to
+// check once.
 type Request struct {
 	c        *Client
 	err      error
 	verb     string
 	path     string
-	body     interface{}
+	body     io.Reader
 	selector labels.Selector
 	timeout  time.Duration
 }
@@ -70,8 +91,8 @@ func (r *Request) Path(item string) *Request {
 	return r
 }
 
-// Use the given item as a resource label selector. Optional.
-func (r *Request) Selector(item string) *Request {
+// Parse the given string as a resource label selector. Optional.
+func (r *Request) ParseSelector(item string) *Request {
 	if r.err != nil {
 		return r
 	}
@@ -79,6 +100,15 @@ func (r *Request) Selector(item string) *Request {
 	return r
 }
 
+// Use the given selector.
+func (r *Request) Selector(s labels.Selector) *Request {
+	if r.err != nil {
+		return r
+	}
+	r.selector = s
+	return r
+}
+
 // Use the given duration as a timeout. Optional.
 func (r *Request) Timeout(d time.Duration) *Request {
 	if r.err != nil {
@@ -96,14 +126,31 @@ func (r *Request) Body(obj interface{}) *Request {
 	if r.err != nil {
 		return r
 	}
-	r.body = obj
+	switch t := obj.(type) {
+	case string:
+		data, err := ioutil.ReadFile(t)
+		if err != nil {
+			r.err = err
+			return r
+		}
+		r.body = bytes.NewBuffer(data)
+	case []byte:
+		r.body = bytes.NewBuffer(t)
+	default:
+		data, err := api.Encode(obj)
+		if err != nil {
+			r.err = err
+			return r
+		}
+		r.body = bytes.NewBuffer(data)
+	}
 	return r
 }
 
-// Format and xecute the request. Returns the API object received, or an error.
-func (r *Request) Do() (interface{}, error) {
+// Format and execute the request.
+func (r *Request) Do() Result {
 	if r.err != nil {
-		return nil, r.err
+		return Result{err: r.err}
 	}
 	finalUrl := r.c.host + r.path
 	query := url.Values{}
@@ -114,32 +161,42 @@ func (r *Request) Do() (interface{}, error) {
 		query.Add("timeout", r.timeout.String())
 	}
 	finalUrl += "?" + query.Encode()
-	var body io.Reader
-	if r.body != nil {
-		switch t := r.body.(type) {
-		case string:
-			data, err := ioutil.ReadFile(t)
-			if err != nil {
-				return nil, err
-			}
-			body = bytes.NewBuffer(data)
-		case []byte:
-			body = bytes.NewBuffer(t)
-		default:
-			data, err := api.Encode(r.body)
-			if err != nil {
-				return nil, err
-			}
-			body = bytes.NewBuffer(data)
-		}
-	}
-	req, err := http.NewRequest(r.verb, finalUrl, body)
+	req, err := http.NewRequest(r.verb, finalUrl, r.body)
 	if err != nil {
-		return nil, err
+		return Result{err: err}
 	}
-	str, err := r.c.doRequest(req)
-	if err != nil {
-		return nil, err
-	}
-	return api.Decode([]byte(str))
+	respBody, err := r.c.doRequest(req)
+	return Result{respBody, err}
+}
+
+// Result contains the result of calling Request.Do().
+type Result struct {
+	body []byte
+	err  error
+}
+
+// Raw returns the raw result.
+func (r Result) Raw() ([]byte, error) {
+	return r.body, r.err
+}
+
+// Get returns the result as an object.
+func (r Result) Get() (interface{}, error) {
+	if r.err != nil {
+		return nil, r.err
+	}
+	return api.Decode(r.body)
+}
+
+// Into stores the result into obj, if possible..
+func (r Result) Into(obj interface{}) error {
+	if r.err != nil {
+		return r.err
+	}
+	return api.DecodeInto(r.body, obj)
+}
+
+// Returns the error executing the request, nil if no error occurred.
+func (r Result) Error() error {
+	return r.err
 }

pkg/client/request_test.go

@@ -24,6 +24,7 @@ import (
 	"time"
 
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/labels"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
 )
 
@@ -42,10 +43,10 @@ func TestDoRequestNewWay(t *testing.T) {
 	obj, err := s.Verb("POST").
 		Path("foo/bar").
 		Path("baz").
-		Selector("name=foo").
+		ParseSelector("name=foo").
 		Timeout(time.Second).
 		Body([]byte(reqBody)).
-		Do()
+		Do().Get()
 	if err != nil {
 		t.Errorf("Unexpected error: %v %#v", err, err)
 		return
@@ -55,7 +56,7 @@ func TestDoRequestNewWay(t *testing.T) {
 	} else if !reflect.DeepEqual(obj, expectedObj) {
 		t.Errorf("Expected: %#v, got %#v", expectedObj, obj)
 	}
-	fakeHandler.ValidateRequest(t, "/foo/bar/baz", "POST", &reqBody)
+	fakeHandler.ValidateRequest(t, "/api/v1beta1/foo/bar/baz", "POST", &reqBody)
 	if fakeHandler.RequestReceived.URL.RawQuery != "labels=name%3Dfoo&timeout=1s" {
 		t.Errorf("Unexpected query: %v", fakeHandler.RequestReceived.URL.RawQuery)
 	}
@@ -80,10 +81,10 @@ func TestDoRequestNewWayObj(t *testing.T) {
 	obj, err := s.Verb("POST").
 		Path("foo/bar").
 		Path("baz").
-		Selector("name=foo").
+		Selector(labels.Set{"name": "foo"}.AsSelector()).
 		Timeout(time.Second).
 		Body(reqObj).
-		Do()
+		Do().Get()
 	if err != nil {
 		t.Errorf("Unexpected error: %v %#v", err, err)
 		return
@@ -94,7 +95,7 @@ func TestDoRequestNewWayObj(t *testing.T) {
 		t.Errorf("Expected: %#v, got %#v", expectedObj, obj)
 	}
 	tmpStr := string(reqBodyExpected)
-	fakeHandler.ValidateRequest(t, "/foo/bar/baz", "POST", &tmpStr)
+	fakeHandler.ValidateRequest(t, "/api/v1beta1/foo/bar/baz", "POST", &tmpStr)
 	if fakeHandler.RequestReceived.URL.RawQuery != "labels=name%3Dfoo&timeout=1s" {
 		t.Errorf("Unexpected query: %v", fakeHandler.RequestReceived.URL.RawQuery)
 	}
@@ -125,10 +126,10 @@ func TestDoRequestNewWayFile(t *testing.T) {
 	obj, err := s.Verb("POST").
 		Path("foo/bar").
 		Path("baz").
-		Selector("name=foo").
+		ParseSelector("name=foo").
 		Timeout(time.Second).
 		Body(file.Name()).
-		Do()
+		Do().Get()
 	if err != nil {
 		t.Errorf("Unexpected error: %v %#v", err, err)
 		return
@@ -139,7 +140,7 @@ func TestDoRequestNewWayFile(t *testing.T) {
 		t.Errorf("Expected: %#v, got %#v", expectedObj, obj)
 	}
 	tmpStr := string(reqBodyExpected)
-	fakeHandler.ValidateRequest(t, "/foo/bar/baz", "POST", &tmpStr)
+	fakeHandler.ValidateRequest(t, "/api/v1beta1/foo/bar/baz", "POST", &tmpStr)
 	if fakeHandler.RequestReceived.URL.RawQuery != "labels=name%3Dfoo&timeout=1s" {
 		t.Errorf("Unexpected query: %v", fakeHandler.RequestReceived.URL.RawQuery)
 	}
@@ -147,3 +148,19 @@ func TestDoRequestNewWayFile(t *testing.T) {
 		t.Errorf("Request is missing authorization header: %#v", *fakeHandler.RequestReceived)
 	}
 }
+
+func TestVerbs(t *testing.T) {
+	c := New("", nil)
+	if r := c.Post(); r.verb != "POST" {
+		t.Errorf("Post verb is wrong")
+	}
+	if r := c.Put(); r.verb != "PUT" {
+		t.Errorf("Put verb is wrong")
+	}
+	if r := c.Get(); r.verb != "GET" {
+		t.Errorf("Get verb is wrong")
+	}
+	if r := c.Delete(); r.verb != "DELETE" {
+		t.Errorf("Delete verb is wrong")
+	}
+}

pkg/cloudcfg/cloudcfg.go

@@ -28,6 +28,7 @@ import (
 
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/labels"
 	"gopkg.in/v1/yaml"
 )
 
@@ -71,9 +72,9 @@ func Update(name string, client client.ClientInterface, updatePeriod time.Durati
 	if err != nil {
 		return err
 	}
-	labels := controller.DesiredState.ReplicaSelector
+	s := labels.Set(controller.DesiredState.ReplicaSelector).AsSelector()
 
-	podList, err := client.ListPods(labels)
+	podList, err := client.ListPods(s)
 	if err != nil {
 		return err
 	}

pkg/cloudcfg/cloudcfg_test.go

@@ -24,6 +24,7 @@ import (
 
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/labels"
 )
 
 // TODO: This doesn't reduce typing enough to make it worth the less readable errors. Remove.
@@ -44,7 +45,7 @@ type FakeKubeClient struct {
 	ctrl    api.ReplicationController
 }
 
-func (client *FakeKubeClient) ListPods(selector map[string]string) (api.PodList, error) {
+func (client *FakeKubeClient) ListPods(selector labels.Selector) (api.PodList, error) {
 	client.actions = append(client.actions, Action{action: "list-pods"})
 	return client.pods, nil
 }

pkg/controller/replication_controller.go

@@ -26,6 +26,7 @@ import (
 
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
+	"github.com/GoogleCloudPlatform/kubernetes/pkg/labels"
 	"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
 	"github.com/coreos/go-etcd/etcd"
 )
@@ -177,7 +178,8 @@ func (rm *ReplicationManager) filterActivePods(pods []api.Pod) []api.Pod {
 }
 
 func (rm *ReplicationManager) syncReplicationController(controllerSpec api.ReplicationController) error {
-	podList, err := rm.kubeClient.ListPods(controllerSpec.DesiredState.ReplicaSelector)
+	s := labels.Set(controllerSpec.DesiredState.ReplicaSelector).AsSelector()
+	podList, err := rm.kubeClient.ListPods(s)
 	if err != nil {
 		return err
 	}