Import of https://github.com/ciena/voltctl at commit 40d61fbf3f910ed4017cf67c9c79e8e1f82a33a5
Change-Id: I8464c59e60d76cb8612891db3303878975b5416c
diff --git a/vendor/k8s.io/client-go/rest/client.go b/vendor/k8s.io/client-go/rest/client.go
new file mode 100644
index 0000000..927403c
--- /dev/null
+++ b/vendor/k8s.io/client-go/rest/client.go
@@ -0,0 +1,258 @@
+/*
+Copyright 2014 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+ http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package rest
+
+import (
+ "fmt"
+ "mime"
+ "net/http"
+ "net/url"
+ "os"
+ "strconv"
+ "strings"
+ "time"
+
+ "k8s.io/apimachinery/pkg/runtime"
+ "k8s.io/apimachinery/pkg/runtime/schema"
+ "k8s.io/apimachinery/pkg/types"
+ "k8s.io/client-go/util/flowcontrol"
+)
+
+const (
+ // Environment variables: Note that the duration should be long enough that the backoff
+ // persists for some reasonable time (i.e. 120 seconds). The typical base might be "1".
+ envBackoffBase = "KUBE_CLIENT_BACKOFF_BASE"
+ envBackoffDuration = "KUBE_CLIENT_BACKOFF_DURATION"
+)
+
+// Interface captures the set of operations for generically interacting with Kubernetes REST apis.
+type Interface interface {
+ GetRateLimiter() flowcontrol.RateLimiter
+ Verb(verb string) *Request
+ Post() *Request
+ Put() *Request
+ Patch(pt types.PatchType) *Request
+ Get() *Request
+ Delete() *Request
+ APIVersion() schema.GroupVersion
+}
+
+// RESTClient imposes common Kubernetes API conventions on a set of resource paths.
+// The baseURL is expected to point to an HTTP or HTTPS path that is the parent
+// of one or more resources. The server should return a decodable API resource
+// object, or an api.Status object which contains information about the reason for
+// any failure.
+//
+// Most consumers should use client.New() to get a Kubernetes API client.
+type RESTClient struct {
+ // base is the root URL for all invocations of the client
+ base *url.URL
+ // versionedAPIPath is a path segment connecting the base URL to the resource root
+ versionedAPIPath string
+
+ // contentConfig is the information used to communicate with the server.
+ contentConfig ContentConfig
+
+ // serializers contain all serializers for underlying content type.
+ serializers Serializers
+
+ // creates BackoffManager that is passed to requests.
+ createBackoffMgr func() BackoffManager
+
+ // TODO extract this into a wrapper interface via the RESTClient interface in kubectl.
+ Throttle flowcontrol.RateLimiter
+
+ // Set specific behavior of the client. If not set http.DefaultClient will be used.
+ Client *http.Client
+}
+
+type Serializers struct {
+ Encoder runtime.Encoder
+ Decoder runtime.Decoder
+ StreamingSerializer runtime.Serializer
+ Framer runtime.Framer
+ RenegotiatedDecoder func(contentType string, params map[string]string) (runtime.Decoder, error)
+}
+
+// NewRESTClient creates a new RESTClient. This client performs generic REST functions
+// such as Get, Put, Post, and Delete on specified paths. Codec controls encoding and
+// decoding of responses from the server.
+func NewRESTClient(baseURL *url.URL, versionedAPIPath string, config ContentConfig, maxQPS float32, maxBurst int, rateLimiter flowcontrol.RateLimiter, client *http.Client) (*RESTClient, error) {
+ base := *baseURL
+ if !strings.HasSuffix(base.Path, "/") {
+ base.Path += "/"
+ }
+ base.RawQuery = ""
+ base.Fragment = ""
+
+ if config.GroupVersion == nil {
+ config.GroupVersion = &schema.GroupVersion{}
+ }
+ if len(config.ContentType) == 0 {
+ config.ContentType = "application/json"
+ }
+ serializers, err := createSerializers(config)
+ if err != nil {
+ return nil, err
+ }
+
+ var throttle flowcontrol.RateLimiter
+ if maxQPS > 0 && rateLimiter == nil {
+ throttle = flowcontrol.NewTokenBucketRateLimiter(maxQPS, maxBurst)
+ } else if rateLimiter != nil {
+ throttle = rateLimiter
+ }
+ return &RESTClient{
+ base: &base,
+ versionedAPIPath: versionedAPIPath,
+ contentConfig: config,
+ serializers: *serializers,
+ createBackoffMgr: readExpBackoffConfig,
+ Throttle: throttle,
+ Client: client,
+ }, nil
+}
+
+// GetRateLimiter returns rate limier for a given client, or nil if it's called on a nil client
+func (c *RESTClient) GetRateLimiter() flowcontrol.RateLimiter {
+ if c == nil {
+ return nil
+ }
+ return c.Throttle
+}
+
+// readExpBackoffConfig handles the internal logic of determining what the
+// backoff policy is. By default if no information is available, NoBackoff.
+// TODO Generalize this see #17727 .
+func readExpBackoffConfig() BackoffManager {
+ backoffBase := os.Getenv(envBackoffBase)
+ backoffDuration := os.Getenv(envBackoffDuration)
+
+ backoffBaseInt, errBase := strconv.ParseInt(backoffBase, 10, 64)
+ backoffDurationInt, errDuration := strconv.ParseInt(backoffDuration, 10, 64)
+ if errBase != nil || errDuration != nil {
+ return &NoBackoff{}
+ }
+ return &URLBackoff{
+ Backoff: flowcontrol.NewBackOff(
+ time.Duration(backoffBaseInt)*time.Second,
+ time.Duration(backoffDurationInt)*time.Second)}
+}
+
+// createSerializers creates all necessary serializers for given contentType.
+// TODO: the negotiated serializer passed to this method should probably return
+// serializers that control decoding and versioning without this package
+// being aware of the types. Depends on whether RESTClient must deal with
+// generic infrastructure.
+func createSerializers(config ContentConfig) (*Serializers, error) {
+ mediaTypes := config.NegotiatedSerializer.SupportedMediaTypes()
+ contentType := config.ContentType
+ mediaType, _, err := mime.ParseMediaType(contentType)
+ if err != nil {
+ return nil, fmt.Errorf("the content type specified in the client configuration is not recognized: %v", err)
+ }
+ info, ok := runtime.SerializerInfoForMediaType(mediaTypes, mediaType)
+ if !ok {
+ if len(contentType) != 0 || len(mediaTypes) == 0 {
+ return nil, fmt.Errorf("no serializers registered for %s", contentType)
+ }
+ info = mediaTypes[0]
+ }
+
+ internalGV := schema.GroupVersions{
+ {
+ Group: config.GroupVersion.Group,
+ Version: runtime.APIVersionInternal,
+ },
+ // always include the legacy group as a decoding target to handle non-error `Status` return types
+ {
+ Group: "",
+ Version: runtime.APIVersionInternal,
+ },
+ }
+
+ s := &Serializers{
+ Encoder: config.NegotiatedSerializer.EncoderForVersion(info.Serializer, *config.GroupVersion),
+ Decoder: config.NegotiatedSerializer.DecoderToVersion(info.Serializer, internalGV),
+
+ RenegotiatedDecoder: func(contentType string, params map[string]string) (runtime.Decoder, error) {
+ info, ok := runtime.SerializerInfoForMediaType(mediaTypes, contentType)
+ if !ok {
+ return nil, fmt.Errorf("serializer for %s not registered", contentType)
+ }
+ return config.NegotiatedSerializer.DecoderToVersion(info.Serializer, internalGV), nil
+ },
+ }
+ if info.StreamSerializer != nil {
+ s.StreamingSerializer = info.StreamSerializer.Serializer
+ s.Framer = info.StreamSerializer.Framer
+ }
+
+ return s, nil
+}
+
+// Verb begins a request with a verb (GET, POST, PUT, DELETE).
+//
+// Example usage of RESTClient's request building interface:
+// c, err := NewRESTClient(...)
+// if err != nil { ... }
+// resp, err := c.Verb("GET").
+// Path("pods").
+// SelectorParam("labels", "area=staging").
+// Timeout(10*time.Second).
+// Do()
+// if err != nil { ... }
+// list, ok := resp.(*api.PodList)
+//
+func (c *RESTClient) Verb(verb string) *Request {
+ backoff := c.createBackoffMgr()
+
+ if c.Client == nil {
+ return NewRequest(nil, verb, c.base, c.versionedAPIPath, c.contentConfig, c.serializers, backoff, c.Throttle, 0)
+ }
+ return NewRequest(c.Client, verb, c.base, c.versionedAPIPath, c.contentConfig, c.serializers, backoff, c.Throttle, c.Client.Timeout)
+}
+
+// Post begins a POST request. Short for c.Verb("POST").
+func (c *RESTClient) Post() *Request {
+ return c.Verb("POST")
+}
+
+// Put begins a PUT request. Short for c.Verb("PUT").
+func (c *RESTClient) Put() *Request {
+ return c.Verb("PUT")
+}
+
+// Patch begins a PATCH request. Short for c.Verb("Patch").
+func (c *RESTClient) Patch(pt types.PatchType) *Request {
+ return c.Verb("PATCH").SetHeader("Content-Type", string(pt))
+}
+
+// Get begins a GET request. Short for c.Verb("GET").
+func (c *RESTClient) Get() *Request {
+ return c.Verb("GET")
+}
+
+// Delete begins a DELETE request. Short for c.Verb("DELETE").
+func (c *RESTClient) Delete() *Request {
+ return c.Verb("DELETE")
+}
+
+// APIVersion returns the APIVersion this RESTClient is expected to use.
+func (c *RESTClient) APIVersion() schema.GroupVersion {
+ return *c.contentConfig.GroupVersion
+}