1 files changed, 337 insertions, 0 deletions
diff --git a/src/kube2msb/vendor/k8s.io/kubernetes/pkg/client/transport/round_trippers.go b/src/kube2msb/vendor/k8s.io/kubernetes/pkg/client/transport/round_trippers.go
new file mode 100644
index 0000000..aadf0cb
--- /dev/null
+++ b/src/kube2msb/vendor/k8s.io/kubernetes/pkg/client/transport/round_trippers.go
@@ -0,0 +1,337 @@
+/*
+Copyright 2015 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 transport
+
+import (
+	"fmt"
+	"net/http"
+	"time"
+
+	"github.com/golang/glog"
+)
+
+// HTTPWrappersForConfig wraps a round tripper with any relevant layered
+// behavior from the config. Exposed to allow more clients that need HTTP-like
+// behavior but then must hijack the underlying connection (like WebSocket or
+// HTTP2 clients). Pure HTTP clients should use the RoundTripper returned from
+// New.
+func HTTPWrappersForConfig(config *Config, rt http.RoundTripper) (http.RoundTripper, error) {
+	if config.WrapTransport != nil {
+		rt = config.WrapTransport(rt)
+	}
+
+	rt = DebugWrappers(rt)
+
+	// Set authentication wrappers
+	switch {
+	case config.HasBasicAuth() && config.HasTokenAuth():
+		return nil, fmt.Errorf("username/password or bearer token may be set, but not both")
+	case config.HasTokenAuth():
+		rt = NewBearerAuthRoundTripper(config.BearerToken, rt)
+	case config.HasBasicAuth():
+		rt = NewBasicAuthRoundTripper(config.Username, config.Password, rt)
+	}
+	if len(config.UserAgent) > 0 {
+		rt = NewUserAgentRoundTripper(config.UserAgent, rt)
+	}
+	if len(config.Impersonate) > 0 {
+		rt = NewImpersonatingRoundTripper(config.Impersonate, rt)
+	}
+	return rt, nil
+}
+
+// DebugWrappers wraps a round tripper and logs based on the current log level.
+func DebugWrappers(rt http.RoundTripper) http.RoundTripper {
+	switch {
+	case bool(glog.V(9)):
+		rt = newDebuggingRoundTripper(rt, debugCurlCommand, debugURLTiming, debugResponseHeaders)
+	case bool(glog.V(8)):
+		rt = newDebuggingRoundTripper(rt, debugJustURL, debugRequestHeaders, debugResponseStatus, debugResponseHeaders)
+	case bool(glog.V(7)):
+		rt = newDebuggingRoundTripper(rt, debugJustURL, debugRequestHeaders, debugResponseStatus)
+	case bool(glog.V(6)):
+		rt = newDebuggingRoundTripper(rt, debugURLTiming)
+	}
+
+	return rt
+}
+
+type requestCanceler interface {
+	CancelRequest(*http.Request)
+}
+
+type userAgentRoundTripper struct {
+	agent string
+	rt    http.RoundTripper
+}
+
+func NewUserAgentRoundTripper(agent string, rt http.RoundTripper) http.RoundTripper {
+	return &userAgentRoundTripper{agent, rt}
+}
+
+func (rt *userAgentRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
+	if len(req.Header.Get("User-Agent")) != 0 {
+		return rt.rt.RoundTrip(req)
+	}
+	req = cloneRequest(req)
+	req.Header.Set("User-Agent", rt.agent)
+	return rt.rt.RoundTrip(req)
+}
+
+func (rt *userAgentRoundTripper) CancelRequest(req *http.Request) {
+	if canceler, ok := rt.rt.(requestCanceler); ok {
+		canceler.CancelRequest(req)
+	} else {
+		glog.Errorf("CancelRequest not implemented")
+	}
+}
+
+func (rt *userAgentRoundTripper) WrappedRoundTripper() http.RoundTripper { return rt.rt }
+
+type basicAuthRoundTripper struct {
+	username string
+	password string
+	rt       http.RoundTripper
+}
+
+// NewBasicAuthRoundTripper will apply a BASIC auth authorization header to a
+// request unless it has already been set.
+func NewBasicAuthRoundTripper(username, password string, rt http.RoundTripper) http.RoundTripper {
+	return &basicAuthRoundTripper{username, password, rt}
+}
+
+func (rt *basicAuthRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
+	if len(req.Header.Get("Authorization")) != 0 {
+		return rt.rt.RoundTrip(req)
+	}
+	req = cloneRequest(req)
+	req.SetBasicAuth(rt.username, rt.password)
+	return rt.rt.RoundTrip(req)
+}
+
+func (rt *basicAuthRoundTripper) CancelRequest(req *http.Request) {
+	if canceler, ok := rt.rt.(requestCanceler); ok {
+		canceler.CancelRequest(req)
+	} else {
+		glog.Errorf("CancelRequest not implemented")
+	}
+}
+
+func (rt *basicAuthRoundTripper) WrappedRoundTripper() http.RoundTripper { return rt.rt }
+
+type impersonatingRoundTripper struct {
+	impersonate string
+	delegate    http.RoundTripper
+}
+
+// NewImpersonatingRoundTripper will add an Act-As header to a request unless it has already been set.
+func NewImpersonatingRoundTripper(impersonate string, delegate http.RoundTripper) http.RoundTripper {
+	return &impersonatingRoundTripper{impersonate, delegate}
+}
+
+func (rt *impersonatingRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
+	if len(req.Header.Get("Impersonate-User")) != 0 {
+		return rt.delegate.RoundTrip(req)
+	}
+	req = cloneRequest(req)
+	req.Header.Set("Impersonate-User", rt.impersonate)
+	return rt.delegate.RoundTrip(req)
+}
+
+func (rt *impersonatingRoundTripper) CancelRequest(req *http.Request) {
+	if canceler, ok := rt.delegate.(requestCanceler); ok {
+		canceler.CancelRequest(req)
+	} else {
+		glog.Errorf("CancelRequest not implemented")
+	}
+}
+
+func (rt *impersonatingRoundTripper) WrappedRoundTripper() http.RoundTripper { return rt.delegate }
+
+type bearerAuthRoundTripper struct {
+	bearer string
+	rt     http.RoundTripper
+}
+
+// NewBearerAuthRoundTripper adds the provided bearer token to a request
+// unless the authorization header has already been set.
+func NewBearerAuthRoundTripper(bearer string, rt http.RoundTripper) http.RoundTripper {
+	return &bearerAuthRoundTripper{bearer, rt}
+}
+
+func (rt *bearerAuthRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
+	if len(req.Header.Get("Authorization")) != 0 {
+		return rt.rt.RoundTrip(req)
+	}
+
+	req = cloneRequest(req)
+	req.Header.Set("Authorization", fmt.Sprintf("Bearer %s", rt.bearer))
+	return rt.rt.RoundTrip(req)
+}
+
+func (rt *bearerAuthRoundTripper) CancelRequest(req *http.Request) {
+	if canceler, ok := rt.rt.(requestCanceler); ok {
+		canceler.CancelRequest(req)
+	} else {
+		glog.Errorf("CancelRequest not implemented")
+	}
+}
+
+func (rt *bearerAuthRoundTripper) WrappedRoundTripper() http.RoundTripper { return rt.rt }
+
+// cloneRequest returns a clone of the provided *http.Request.
+// The clone is a shallow copy of the struct and its Header map.
+func cloneRequest(r *http.Request) *http.Request {
+	// shallow copy of the struct
+	r2 := new(http.Request)
+	*r2 = *r
+	// deep copy of the Header
+	r2.Header = make(http.Header)
+	for k, s := range r.Header {
+		r2.Header[k] = s
+	}
+	return r2
+}
+
+// requestInfo keeps track of information about a request/response combination
+type requestInfo struct {
+	RequestHeaders http.Header
+	RequestVerb    string
+	RequestURL     string
+
+	ResponseStatus  string
+	ResponseHeaders http.Header
+	ResponseErr     error
+
+	Duration time.Duration
+}
+
+// newRequestInfo creates a new RequestInfo based on an http request
+func newRequestInfo(req *http.Request) *requestInfo {
+	return &requestInfo{
+		RequestURL:     req.URL.String(),
+		RequestVerb:    req.Method,
+		RequestHeaders: req.Header,
+	}
+}
+
+// complete adds information about the response to the requestInfo
+func (r *requestInfo) complete(response *http.Response, err error) {
+	if err != nil {
+		r.ResponseErr = err
+		return
+	}
+	r.ResponseStatus = response.Status
+	r.ResponseHeaders = response.Header
+}
+
+// toCurl returns a string that can be run as a command in a terminal (minus the body)
+func (r *requestInfo) toCurl() string {
+	headers := ""
+	for key, values := range r.RequestHeaders {
+		for _, value := range values {
+			headers += fmt.Sprintf(` -H %q`, fmt.Sprintf("%s: %s", key, value))
+		}
+	}
+
+	return fmt.Sprintf("curl -k -v -X%s %s %s", r.RequestVerb, headers, r.RequestURL)
+}
+
+// debuggingRoundTripper will display information about the requests passing
+// through it based on what is configured
+type debuggingRoundTripper struct {
+	delegatedRoundTripper http.RoundTripper
+
+	levels map[debugLevel]bool
+}
+
+type debugLevel int
+
+const (
+	debugJustURL debugLevel = iota
+	debugURLTiming
+	debugCurlCommand
+	debugRequestHeaders
+	debugResponseStatus
+	debugResponseHeaders
+)
+
+func newDebuggingRoundTripper(rt http.RoundTripper, levels ...debugLevel) *debuggingRoundTripper {
+	drt := &debuggingRoundTripper{
+		delegatedRoundTripper: rt,
+		levels:                make(map[debugLevel]bool, len(levels)),
+	}
+	for _, v := range levels {
+		drt.levels[v] = true
+	}
+	return drt
+}
+
+func (rt *debuggingRoundTripper) CancelRequest(req *http.Request) {
+	if canceler, ok := rt.delegatedRoundTripper.(requestCanceler); ok {
+		canceler.CancelRequest(req)
+	} else {
+		glog.Errorf("CancelRequest not implemented")
+	}
+}
+
+func (rt *debuggingRoundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
+	reqInfo := newRequestInfo(req)
+
+	if rt.levels[debugJustURL] {
+		glog.Infof("%s %s", reqInfo.RequestVerb, reqInfo.RequestURL)
+	}
+	if rt.levels[debugCurlCommand] {
+		glog.Infof("%s", reqInfo.toCurl())
+
+	}
+	if rt.levels[debugRequestHeaders] {
+		glog.Infof("Request Headers:")
+		for key, values := range reqInfo.RequestHeaders {
+			for _, value := range values {
+				glog.Infof("    %s: %s", key, value)
+			}
+		}
+	}
+
+	startTime := time.Now()
+	response, err := rt.delegatedRoundTripper.RoundTrip(req)
+	reqInfo.Duration = time.Since(startTime)
+
+	reqInfo.complete(response, err)
+
+	if rt.levels[debugURLTiming] {
+		glog.Infof("%s %s %s in %d milliseconds", reqInfo.RequestVerb, reqInfo.RequestURL, reqInfo.ResponseStatus, reqInfo.Duration.Nanoseconds()/int64(time.Millisecond))
+	}
+	if rt.levels[debugResponseStatus] {
+		glog.Infof("Response Status: %s in %d milliseconds", reqInfo.ResponseStatus, reqInfo.Duration.Nanoseconds()/int64(time.Millisecond))
+	}
+	if rt.levels[debugResponseHeaders] {
+		glog.Infof("Response Headers:")
+		for key, values := range reqInfo.ResponseHeaders {
+			for _, value := range values {
+				glog.Infof("    %s: %s", key, value)
+			}
+		}
+	}
+
+	return response, err
+}
+
+func (rt *debuggingRoundTripper) WrappedRoundTripper() http.RoundTripper {
+	return rt.delegatedRoundTripper
+}