Store RequestInfo in Context

... in order to replace the manual RequestInfoResolver dependency injection
through out the code.

pkg/apiserver/api_installer.go

@@ -40,7 +40,6 @@ import (
 
 type APIInstaller struct {
 	group             *APIGroupVersion
-	info              *RequestInfoResolver
 	prefix            string // Path prefix where API resources are to be registered.
 	minRequestTimeout time.Duration
 }
@@ -70,8 +69,7 @@ func (a *APIInstaller) Install(ws *restful.WebService) (apiResources []unversion
 		prefix:     a.prefix + "/proxy/",
 		storage:    a.group.Storage,
 		serializer: a.group.Serializer,
-		context:             a.group.Context,
+		mapper:     a.group.Context,
-		requestInfoResolver: a.info,
 	})
 
 	// Register the paths in a deterministic (sorted) order to get a deterministic swagger spec.

pkg/apiserver/apiserver.go

@@ -67,10 +67,6 @@ type APIGroupVersion struct {
 	// GroupVersion is the external group version
 	GroupVersion unversioned.GroupVersion
 
-	// RequestInfoResolver is used to parse URLs for the legacy proxy handler.  Don't use this for anything else
-	// TODO: refactor proxy handler to use sub resources
-	RequestInfoResolver *RequestInfoResolver
-
 	// OptionsExternalVersion controls the Kubernetes APIVersion used for common objects in the apiserver
 	// schema like api.Status, api.DeleteOptions, and api.ListOptions. Other implementors may
 	// define a version "v1beta1" but want to use the Kubernetes "v1" internal objects. If
@@ -175,7 +171,6 @@ func (g *APIGroupVersion) newInstaller() *APIInstaller {
 	prefix := path.Join(g.Root, g.GroupVersion.Group, g.GroupVersion.Version)
 	installer := &APIInstaller{
 		group:             g,
-		info:              g.RequestInfoResolver,
 		prefix:            prefix,
 		minRequestTimeout: g.MinRequestTimeout,
 	}

pkg/apiserver/apiserver_test.go

@@ -39,11 +39,14 @@ import (
 	"k8s.io/kubernetes/pkg/api/rest"
 	"k8s.io/kubernetes/pkg/api/unversioned"
 	"k8s.io/kubernetes/pkg/api/v1"
+	"k8s.io/kubernetes/pkg/apiserver/filters"
+	"k8s.io/kubernetes/pkg/apiserver/request"
 	apiservertesting "k8s.io/kubernetes/pkg/apiserver/testing"
 	"k8s.io/kubernetes/pkg/fields"
 	"k8s.io/kubernetes/pkg/labels"
 	"k8s.io/kubernetes/pkg/runtime"
 	"k8s.io/kubernetes/pkg/util/diff"
+	"k8s.io/kubernetes/pkg/util/sets"
 	"k8s.io/kubernetes/pkg/watch"
 	"k8s.io/kubernetes/pkg/watch/versioned"
 	"k8s.io/kubernetes/plugin/pkg/admission/admit"
@@ -259,8 +262,6 @@ func handleInternal(storage map[string]rest.Storage, admissionControl admission.
 	template := APIGroupVersion{
 		Storage: storage,
 
-		RequestInfoResolver: newTestRequestInfoResolver(),
-
 		Creater:   api.Scheme,
 		Convertor: api.Scheme,
 		Copier:    api.Scheme,
@@ -2388,7 +2389,6 @@ func TestUpdateREST(t *testing.T) {
 		return &APIGroupVersion{
 			Storage:   storage,
 			Root:      "/" + prefix,
-			RequestInfoResolver: newTestRequestInfoResolver(),
 			Creater:   api.Scheme,
 			Convertor: api.Scheme,
 			Copier:    api.Scheme,
@@ -2473,7 +2473,6 @@ func TestParentResourceIsRequired(t *testing.T) {
 			"simple/sub": storage,
 		},
 		Root:      "/" + prefix,
-		RequestInfoResolver: newTestRequestInfoResolver(),
 		Creater:   api.Scheme,
 		Convertor: api.Scheme,
 		Copier:    api.Scheme,
@@ -2505,7 +2504,6 @@ func TestParentResourceIsRequired(t *testing.T) {
 			"simple/sub": storage,
 		},
 		Root:      "/" + prefix,
-		RequestInfoResolver: newTestRequestInfoResolver(),
 		Creater:   api.Scheme,
 		Convertor: api.Scheme,
 		Copier:    api.Scheme,
@@ -3131,8 +3129,6 @@ func TestXGSubresource(t *testing.T) {
 	group := APIGroupVersion{
 		Storage: storage,
 
-		RequestInfoResolver: newTestRequestInfoResolver(),
-
 		Creater:   api.Scheme,
 		Convertor: api.Scheme,
 		Copier:    api.Scheme,
@@ -3159,8 +3155,7 @@ func TestXGSubresource(t *testing.T) {
 		panic(fmt.Sprintf("unable to install container %s: %v", group.GroupVersion, err))
 	}
 
-	handler := defaultAPIServer{mux, container}
+	server := newTestServer(defaultAPIServer{mux, container})
-	server := httptest.NewServer(handler)
 	defer server.Close()
 
 	resp, err := http.Get(server.URL + "/" + prefix + "/" + testGroupVersion.Group + "/" + testGroupVersion.Version + "/namespaces/default/simple/" + itemID + "/subsimple")
@@ -3249,3 +3244,16 @@ func BenchmarkUpdateProtobuf(b *testing.B) {
 	}
 	b.StopTimer()
 }
+
+func newTestServer(handler http.Handler) *httptest.Server {
+	handler = filters.WithRequestInfo(handler, newTestRequestInfoResolver(), requestContextMapper)
+	handler = api.WithRequestContext(handler, requestContextMapper)
+	return httptest.NewServer(handler)
+}
+
+func newTestRequestInfoResolver() *request.RequestInfoResolver {
+	return &request.RequestInfoResolver{
+		APIPrefixes:          sets.NewString("api", "apis"),
+		GrouplessAPIPrefixes: sets.NewString("api"),
+	}
+}

pkg/apiserver/errors.go

@@ -76,6 +76,13 @@ func notFound(w http.ResponseWriter, req *http.Request) {
 	fmt.Fprintf(w, "Not Found: %#v", req.RequestURI)
 }
 
+// internalError renders a simple internal error
+func internalError(w http.ResponseWriter, req *http.Request, err error) {
+	w.WriteHeader(http.StatusInternalServerError)
+	fmt.Fprintf(w, "Internal Server Error: %#v", req.RequestURI)
+	runtime.HandleError(err)
+}
+
 // errAPIPrefixNotFound indicates that a RequestInfo resolution failed because the request isn't under
 // any known API prefixes
 type errAPIPrefixNotFound struct {

pkg/apiserver/filters/audit.go

@@ -89,7 +89,11 @@ func WithAudit(handler http.Handler, attributeGetter RequestAttributeGetter, out
 		return handler
 	}
 	return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
-		attribs := attributeGetter.GetAttribs(req)
+		attribs, err := attributeGetter.GetAttribs(req)
+		if err != nil {
+			internalError(w, req, err)
+			return
+		}
 		asuser := req.Header.Get("Impersonate-User")
 		if len(asuser) == 0 {
 			asuser = "<self>"

pkg/apiserver/filters/audit_test.go

@@ -29,9 +29,8 @@ import (
 	"testing"
 
 	"k8s.io/kubernetes/pkg/api"
-	"k8s.io/kubernetes/pkg/apiserver"
+	"k8s.io/kubernetes/pkg/apiserver/request"
 	"k8s.io/kubernetes/pkg/auth/user"
-	"k8s.io/kubernetes/pkg/util/sets"
 )
 
 type simpleResponseWriter struct {
@@ -72,22 +71,14 @@ func (*fakeHTTPHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
 	w.WriteHeader(200)
 }
 
-type fakeRequestContextMapper struct{}
-
-func (*fakeRequestContextMapper) Get(req *http.Request) (api.Context, bool) {
-	return api.WithUser(api.NewContext(), &user.DefaultInfo{Name: "admin"}), true
-
-}
-
-func (*fakeRequestContextMapper) Update(req *http.Request, context api.Context) error {
-	return nil
-}
-
 func TestAudit(t *testing.T) {
 	var buf bytes.Buffer
-	attributeGetter := NewRequestAttributeGetter(&fakeRequestContextMapper{},
+
-		&apiserver.RequestInfoResolver{APIPrefixes: sets.NewString("api", "apis"), GrouplessAPIPrefixes: sets.NewString("api")})
+	attributeGetter := NewRequestAttributeGetter(&fakeRequestContextMapper{
+		user: &user.DefaultInfo{Name: "admin"},
+	})
 	handler := WithAudit(&fakeHTTPHandler{}, attributeGetter, &buf)
+
 	req, _ := http.NewRequest("GET", "/api/v1/namespaces/default/pods", nil)
 	req.RemoteAddr = "127.0.0.1"
 	handler.ServeHTTP(httptest.NewRecorder(), req)
@@ -110,3 +101,26 @@ func TestAudit(t *testing.T) {
 		t.Errorf("Unexpected second line of audit: %s", line[1])
 	}
 }
+
+type fakeRequestContextMapper struct {
+	user *user.DefaultInfo
+}
+
+func (m *fakeRequestContextMapper) Get(req *http.Request) (api.Context, bool) {
+	ctx := api.NewContext()
+	if m.user != nil {
+		ctx = api.WithUser(ctx, m.user)
+	}
+
+	resolver := newTestRequestInfoResolver()
+	info, err := resolver.GetRequestInfo(req)
+	if err == nil {
+		ctx = request.WithRequestInfo(ctx, info)
+	}
+
+	return ctx, true
+}
+
+func (*fakeRequestContextMapper) Update(req *http.Request, context api.Context) error {
+	return nil
+}

pkg/apiserver/filters/authorization.go

@@ -17,12 +17,13 @@ limitations under the License.
 package filters
 
 import (
+	"errors"
 	"net/http"
 
 	"github.com/golang/glog"
 
 	"k8s.io/kubernetes/pkg/api"
-	"k8s.io/kubernetes/pkg/apiserver"
+	"k8s.io/kubernetes/pkg/apiserver/request"
 	"k8s.io/kubernetes/pkg/auth/authorizer"
 )
 
@@ -33,7 +34,12 @@ func WithAuthorization(handler http.Handler, getAttribs RequestAttributeGetter,
 		return handler
 	}
 	return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
-		authorized, reason, err := a.Authorize(getAttribs.GetAttribs(req))
+		attrs, err := getAttribs.GetAttribs(req)
+		if err != nil {
+			internalError(w, req, err)
+			return
+		}
+		authorized, reason, err := a.Authorize(attrs)
 		if err != nil {
 			internalError(w, req, err)
 			return
@@ -49,31 +55,35 @@ func WithAuthorization(handler http.Handler, getAttribs RequestAttributeGetter,
 
 // RequestAttributeGetter is a function that extracts authorizer.Attributes from an http.Request
 type RequestAttributeGetter interface {
-	GetAttribs(req *http.Request) (attribs authorizer.Attributes)
+	GetAttribs(req *http.Request) (authorizer.Attributes, error)
 }
 
 type requestAttributeGetter struct {
 	requestContextMapper api.RequestContextMapper
-	requestInfoResolver  *apiserver.RequestInfoResolver
 }
 
 // NewAttributeGetter returns an object which implements the RequestAttributeGetter interface.
-func NewRequestAttributeGetter(requestContextMapper api.RequestContextMapper, requestInfoResolver *apiserver.RequestInfoResolver) RequestAttributeGetter {
+func NewRequestAttributeGetter(requestContextMapper api.RequestContextMapper) RequestAttributeGetter {
-	return &requestAttributeGetter{requestContextMapper, requestInfoResolver}
+	return &requestAttributeGetter{requestContextMapper}
 }
 
-func (r *requestAttributeGetter) GetAttribs(req *http.Request) authorizer.Attributes {
+func (r *requestAttributeGetter) GetAttribs(req *http.Request) (authorizer.Attributes, error) {
 	attribs := authorizer.AttributesRecord{}
 
 	ctx, ok := r.requestContextMapper.Get(req)
-	if ok {
+	if !ok {
+		return nil, errors.New("no context found for request")
+	}
+
 	user, ok := api.UserFrom(ctx)
 	if ok {
 		attribs.User = user
 	}
-	}
 
-	requestInfo, _ := r.requestInfoResolver.GetRequestInfo(req)
+	requestInfo, found := request.RequestInfoFrom(ctx)
+	if !found {
+		return nil, errors.New("no RequestInfo found in the context")
+	}
 
 	// Start with common attributes that apply to resource and non-resource requests
 	attribs.ResourceRequest = requestInfo.IsResourceRequest
@@ -87,5 +97,5 @@ func (r *requestAttributeGetter) GetAttribs(req *http.Request) authorizer.Attrib
 	attribs.Namespace = requestInfo.Namespace
 	attribs.Name = requestInfo.Name
 
-	return &attribs
+	return &attribs, nil
 }

pkg/apiserver/filters/authorization_test.go

@@ -18,18 +18,18 @@ package filters
 
 import (
 	"net/http"
+	"net/http/httptest"
 	"reflect"
 	"testing"
 
 	"k8s.io/kubernetes/pkg/api"
 	"k8s.io/kubernetes/pkg/apis/extensions"
-	"k8s.io/kubernetes/pkg/apiserver"
 	"k8s.io/kubernetes/pkg/auth/authorizer"
-	"k8s.io/kubernetes/pkg/util/sets"
 )
 
 func TestGetAttribs(t *testing.T) {
-	r := &requestAttributeGetter{api.NewRequestContextMapper(), &apiserver.RequestInfoResolver{APIPrefixes: sets.NewString("api", "apis"), GrouplessAPIPrefixes: sets.NewString("api")}}
+	mapper := api.NewRequestContextMapper()
+	attributeGetter := NewRequestAttributeGetter(mapper)
 
 	testcases := map[string]struct {
 		Verb               string
@@ -103,8 +103,20 @@ func TestGetAttribs(t *testing.T) {
 
 	for k, tc := range testcases {
 		req, _ := http.NewRequest(tc.Verb, tc.Path, nil)
-		attribs := r.GetAttribs(req)
+		req.RemoteAddr = "127.0.0.1"
-		if !reflect.DeepEqual(attribs, tc.ExpectedAttributes) {
+
+		var attribs authorizer.Attributes
+		var err error
+		var handler http.Handler = http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
+			attribs, err = attributeGetter.GetAttribs(req)
+		})
+		handler = WithRequestInfo(handler, newTestRequestInfoResolver(), mapper)
+		handler = api.WithRequestContext(handler, mapper)
+		handler.ServeHTTP(httptest.NewRecorder(), req)
+
+		if err != nil {
+			t.Errorf("%s: unexpected error: %v", k, err)
+		} else if !reflect.DeepEqual(attribs, tc.ExpectedAttributes) {
 			t.Errorf("%s: expected\n\t%#v\ngot\n\t%#v", k, tc.ExpectedAttributes, attribs)
 		}
 	}

pkg/apiserver/filters/requestinfo.go

@@ -0,0 +1,46 @@
+/*
+Copyright 2016 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 filters
+
+import (
+	"errors"
+	"fmt"
+	"net/http"
+
+	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/apiserver/request"
+)
+
+// WithRequestInfo attaches a RequestInfo to the context.
+func WithRequestInfo(handler http.Handler, resolver *request.RequestInfoResolver, requestContextMapper api.RequestContextMapper) http.Handler {
+	return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
+		ctx, ok := requestContextMapper.Get(req)
+		if !ok {
+			internalError(w, req, errors.New("no context found for request"))
+			return
+		}
+
+		info, err := resolver.GetRequestInfo(req)
+		if err != nil {
+			internalError(w, req, fmt.Errorf("failed to create RequestInfo: %v", err))
+		}
+
+		requestContextMapper.Update(req, request.WithRequestInfo(ctx, info))
+
+		handler.ServeHTTP(w, req)
+	})
+}

pkg/apiserver/filters/requestinfo_test.go

@@ -0,0 +1,29 @@
+/*
+Copyright 2016 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 filters
+
+import (
+	"k8s.io/kubernetes/pkg/apiserver/request"
+	"k8s.io/kubernetes/pkg/util/sets"
+)
+
+func newTestRequestInfoResolver() *request.RequestInfoResolver {
+	return &request.RequestInfoResolver{
+		APIPrefixes:          sets.NewString("api", "apis"),
+		GrouplessAPIPrefixes: sets.NewString("api"),
+	}
+}

pkg/apiserver/proxy.go

@@ -17,6 +17,7 @@ limitations under the License.
 package apiserver
 
 import (
+	"errors"
 	"io"
 	"math/rand"
 	"net/http"
@@ -27,7 +28,7 @@ import (
 	"time"
 
 	"k8s.io/kubernetes/pkg/api"
-	"k8s.io/kubernetes/pkg/api/errors"
+	apierrors "k8s.io/kubernetes/pkg/api/errors"
 	"k8s.io/kubernetes/pkg/api/rest"
 	"k8s.io/kubernetes/pkg/api/unversioned"
 	"k8s.io/kubernetes/pkg/apiserver/metrics"
@@ -38,6 +39,7 @@ import (
 	proxyutil "k8s.io/kubernetes/pkg/util/proxy"
 
 	"github.com/golang/glog"
+	"k8s.io/kubernetes/pkg/apiserver/request"
 )
 
 // ProxyHandler provides a http.Handler which will proxy traffic to locations
@@ -46,8 +48,7 @@ type ProxyHandler struct {
 	prefix     string
 	storage    map[string]rest.Storage
 	serializer runtime.NegotiatedSerializer
-	context             api.RequestContextMapper
+	mapper     api.RequestContextMapper
-	requestInfoResolver *RequestInfoResolver
 }
 
 func (r *ProxyHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
@@ -59,8 +60,19 @@ func (r *ProxyHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
 	reqStart := time.Now()
 	defer metrics.Monitor(&verb, &apiResource, net.GetHTTPClient(req), w.Header().Get("Content-Type"), httpCode, reqStart)
 
-	requestInfo, err := r.requestInfoResolver.GetRequestInfo(req)
+	ctx, ok := r.mapper.Get(req)
-	if err != nil || !requestInfo.IsResourceRequest {
+	if !ok {
+		internalError(w, req, errors.New("Error getting request context"))
+		return
+	}
+
+	requestInfo, ok := request.RequestInfoFrom(ctx)
+	if !ok {
+		internalError(w, req, errors.New("Error getting RequestInfo from context"))
+		httpCode = http.StatusInternalServerError
+		return
+	}
+	if !requestInfo.IsResourceRequest {
 		notFound(w, req)
 		httpCode = http.StatusNotFound
 		return
@@ -68,10 +80,6 @@ func (r *ProxyHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
 	verb = requestInfo.Verb
 	namespace, resource, parts := requestInfo.Namespace, requestInfo.Resource, requestInfo.Parts
 
-	ctx, ok := r.context.Get(req)
-	if !ok {
-		ctx = api.NewContext()
-	}
 	ctx = api.WithNamespace(ctx, namespace)
 	if len(parts) < 2 {
 		notFound(w, req)
@@ -104,7 +112,7 @@ func (r *ProxyHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
 	redirector, ok := storage.(rest.Redirector)
 	if !ok {
 		httplog.LogOf(req, w).Addf("'%v' is not a redirector", resource)
-		httpCode = errorNegotiated(errors.NewMethodNotSupported(api.Resource(resource), "proxy"), r.serializer, gv, w, req)
+		httpCode = errorNegotiated(apierrors.NewMethodNotSupported(api.Resource(resource), "proxy"), r.serializer, gv, w, req)
 		return
 	}
 

pkg/apiserver/proxy_test.go

@@ -204,7 +204,7 @@ func TestProxyRequestContentLengthAndTransferEncoding(t *testing.T) {
 			expectedResourceNamespace: "default",
 		}
 		namespaceHandler := handleNamespaced(map[string]rest.Storage{"foo": simpleStorage})
-		server := httptest.NewServer(namespaceHandler)
+		server := newTestServer(namespaceHandler)
 		defer server.Close()
 
 		// Dial the proxy server
@@ -310,7 +310,7 @@ func TestProxy(t *testing.T) {
 		}
 
 		namespaceHandler := handleNamespaced(map[string]rest.Storage{"foo": simpleStorage})
-		namespaceServer := httptest.NewServer(namespaceHandler)
+		namespaceServer := newTestServer(namespaceHandler)
 		defer namespaceServer.Close()
 
 		// test each supported URL pattern for finding the redirection resource in the proxy in a particular namespace
@@ -432,7 +432,7 @@ func TestProxyUpgrade(t *testing.T) {
 
 		namespaceHandler := handleNamespaced(map[string]rest.Storage{"foo": simpleStorage})
 
-		server := httptest.NewServer(namespaceHandler)
+		server := newTestServer(namespaceHandler)
 		defer server.Close()
 
 		ws, err := websocket.Dial("ws://"+server.Listener.Addr().String()+"/"+prefix+"/"+newGroupVersion.Group+"/"+newGroupVersion.Version+"/proxy/namespaces/myns/foo/123", "", "http://127.0.0.1/")
@@ -496,7 +496,7 @@ func TestRedirectOnMissingTrailingSlash(t *testing.T) {
 		}
 
 		handler := handleNamespaced(map[string]rest.Storage{"foo": simpleStorage})
-		server := httptest.NewServer(handler)
+		server := newTestServer(handler)
 		defer server.Close()
 
 		proxyTestPattern := "/" + prefix + "/" + newGroupVersion.Group + "/" + newGroupVersion.Version + "/proxy/namespaces/ns/foo/id" + item.path

pkg/apiserver/request/doc.go

@@ -0,0 +1,20 @@
+/*
+Copyright 2016 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 request contains everything around extracting info from
+// a http request object.
+// TODO: this package is temporary. Handlers must move into pkg/apiserver/handlers to avoid dependency cycle
+package request // import "k8s.io/kubernetes/pkg/apiserver/request"

pkg/apiserver/request/requestinfo.go

@@ -1,5 +1,5 @@
 /*
-Copyright 2015 The Kubernetes Authors.
+Copyright 2016 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.
@@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-package apiserver
+package request
 
 import (
 	"fmt"
@@ -68,8 +68,8 @@ var namespaceSubresources = sets.NewString("status", "finalize")
 var NamespaceSubResourcesForTest = sets.NewString(namespaceSubresources.List()...)
 
 type RequestInfoResolver struct {
-	APIPrefixes          sets.String
+	APIPrefixes          sets.String // without leading and trailing slashes
-	GrouplessAPIPrefixes sets.String
+	GrouplessAPIPrefixes sets.String // without leading and trailing slashes
 }
 
 // TODO write an integration test against the swagger doc to test the RequestInfo and match up behavior to responses
@@ -103,7 +103,7 @@ type RequestInfoResolver struct {
 // /api
 // /healthz
 // /
-func (r *RequestInfoResolver) GetRequestInfo(req *http.Request) (RequestInfo, error) {
+func (r *RequestInfoResolver) GetRequestInfo(req *http.Request) (*RequestInfo, error) {
 	// start with a non-resource request until proven otherwise
 	requestInfo := RequestInfo{
 		IsResourceRequest: false,
@@ -114,12 +114,12 @@ func (r *RequestInfoResolver) GetRequestInfo(req *http.Request) (RequestInfo, er
 	currentParts := splitPath(req.URL.Path)
 	if len(currentParts) < 3 {
 		// return a non-resource request
-		return requestInfo, nil
+		return &requestInfo, nil
 	}
 
 	if !r.APIPrefixes.Has(currentParts[0]) {
 		// return a non-resource request
-		return requestInfo, nil
+		return &requestInfo, nil
 	}
 	requestInfo.APIPrefix = currentParts[0]
 	currentParts = currentParts[1:]
@@ -128,7 +128,7 @@ func (r *RequestInfoResolver) GetRequestInfo(req *http.Request) (RequestInfo, er
 		// one part (APIPrefix) has already been consumed, so this is actually "do we have four parts?"
 		if len(currentParts) < 3 {
 			// return a non-resource request
-			return requestInfo, nil
+			return &requestInfo, nil
 		}
 
 		requestInfo.APIGroup = currentParts[0]
@@ -142,7 +142,7 @@ func (r *RequestInfoResolver) GetRequestInfo(req *http.Request) (RequestInfo, er
 	// handle input of form /{specialVerb}/*
 	if specialVerbs.Has(currentParts[0]) {
 		if len(currentParts) < 2 {
-			return requestInfo, fmt.Errorf("unable to determine kind and namespace from url, %v", req.URL)
+			return &requestInfo, fmt.Errorf("unable to determine kind and namespace from url, %v", req.URL)
 		}
 
 		requestInfo.Verb = currentParts[0]
@@ -204,7 +204,25 @@ func (r *RequestInfoResolver) GetRequestInfo(req *http.Request) (RequestInfo, er
 		requestInfo.Verb = "deletecollection"
 	}
 
-	return requestInfo, nil
+	return &requestInfo, nil
+}
+
+type requestInfoKeyType int
+
+// requestInfoKey is the RequestInfo key for the context. It's of private type here. Because
+// keys are interfaces and interfaces are equal when the type and the value is equal, this
+// does not conflict with the keys defined in pkg/api.
+const requestInfoKey requestInfoKeyType = iota
+
+// WithRequestInfo returns a copy of parent in which the request info value is set
+func WithRequestInfo(parent api.Context, info *RequestInfo) api.Context {
+	return api.WithValue(parent, requestInfoKey, info)
+}
+
+// RequestInfoFrom returns the value of the RequestInfo key on the ctx
+func RequestInfoFrom(ctx api.Context) (*RequestInfo, bool) {
+	info, ok := ctx.Value(requestInfoKey).(*RequestInfo)
+	return info, ok
 }
 
 // splitPath returns the segments for a URL path.

pkg/apiserver/request/requestinfo_test.go

@@ -1,5 +1,5 @@
 /*
-Copyright 2014 The Kubernetes Authors.
+Copyright 2016 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.
@@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-package apiserver
+package request
 
 import (
 	"net/http"
@@ -194,5 +194,8 @@ func TestGetNonAPIRequestInfo(t *testing.T) {
 }
 
 func newTestRequestInfoResolver() *RequestInfoResolver {
-	return &RequestInfoResolver{sets.NewString("api", "apis"), sets.NewString("api")}
+	return &RequestInfoResolver{
+		APIPrefixes:          sets.NewString("api", "apis"),
+		GrouplessAPIPrefixes: sets.NewString("api"),
+	}
 }

pkg/genericapiserver/config.go

@@ -354,17 +354,21 @@ func (s *GenericAPIServer) buildHandlerChains(c *Config, handler http.Handler) (
 
 	// insecure filters
 	insecure = handler
-	insecure = genericfilters.WithPanicRecovery(insecure, s.NewRequestInfoResolver())
+	insecure = genericfilters.WithPanicRecovery(insecure, c.RequestContextMapper)
+	insecure = apiserverfilters.WithRequestInfo(insecure, s.NewRequestInfoResolver(), c.RequestContextMapper)
+	insecure = api.WithRequestContext(insecure, c.RequestContextMapper)
 	insecure = genericfilters.WithTimeoutForNonLongRunningRequests(insecure, c.LongRunningFunc)
 
 	// secure filters
-	attributeGetter := apiserverfilters.NewRequestAttributeGetter(c.RequestContextMapper, s.NewRequestInfoResolver())
+	attributeGetter := apiserverfilters.NewRequestAttributeGetter(c.RequestContextMapper)
 	secure = handler
 	secure = apiserverfilters.WithAuthorization(secure, attributeGetter, c.Authorizer)
 	secure = apiserverfilters.WithImpersonation(secure, c.RequestContextMapper, c.Authorizer)
 	secure = apiserverfilters.WithAudit(secure, attributeGetter, c.AuditWriter) // before impersonation to read original user
 	secure = authhandlers.WithAuthentication(secure, c.RequestContextMapper, c.Authenticator, authhandlers.Unauthorized(c.SupportsBasicAuth))
-	secure = genericfilters.WithPanicRecovery(secure, s.NewRequestInfoResolver())
+	secure = genericfilters.WithPanicRecovery(secure, c.RequestContextMapper)
+	secure = apiserverfilters.WithRequestInfo(secure, s.NewRequestInfoResolver(), c.RequestContextMapper)
+	secure = api.WithRequestContext(secure, c.RequestContextMapper)
 	secure = genericfilters.WithTimeoutForNonLongRunningRequests(secure, c.LongRunningFunc)
 	secure = genericfilters.WithMaxInFlightLimit(secure, c.MaxRequestsInFlight, c.LongRunningFunc)
 

pkg/genericapiserver/filters/panics.go

@@ -22,14 +22,15 @@ import (
 
 	"github.com/golang/glog"
 
-	"k8s.io/kubernetes/pkg/api/errors"
+	"k8s.io/kubernetes/pkg/api"
-	"k8s.io/kubernetes/pkg/apiserver"
+	apierrors "k8s.io/kubernetes/pkg/api/errors"
+	"k8s.io/kubernetes/pkg/apiserver/request"
 	"k8s.io/kubernetes/pkg/httplog"
 	"k8s.io/kubernetes/pkg/util/runtime"
 )
 
 // WithPanicRecovery wraps an http Handler to recover and log panics.
-func WithPanicRecovery(handler http.Handler, resolver *apiserver.RequestInfoResolver) http.Handler {
+func WithPanicRecovery(handler http.Handler, requestContextMapper api.RequestContextMapper) http.Handler {
 	return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
 		defer runtime.HandleCrash(func(err interface{}) {
 			http.Error(w, "This request caused apisever to panic. Look in log for details.", http.StatusInternalServerError)
@@ -37,8 +38,19 @@ func WithPanicRecovery(handler http.Handler, resolver *apiserver.RequestInfoReso
 		})
 
 		logger := httplog.NewLogged(req, &w)
-		requestInfo, err := resolver.GetRequestInfo(req)
+
-		if err != nil || requestInfo.Verb != "proxy" {
+		var requestInfo *request.RequestInfo
+		ctx, ok := requestContextMapper.Get(req)
+		if !ok {
+			glog.Errorf("no context found for request, handler chain must be wrong")
+		} else {
+			requestInfo, ok = request.RequestInfoFrom(ctx)
+			if !ok {
+				glog.Errorf("no RequestInfo found in context, handler chain must be wrong")
+			}
+		}
+
+		if !ok || requestInfo.Verb != "proxy" {
 			logger.StacktraceWhen(
 				httplog.StatusIsNot(
 					http.StatusOK,
@@ -52,12 +64,13 @@ func WithPanicRecovery(handler http.Handler, resolver *apiserver.RequestInfoReso
 					http.StatusUnauthorized,
 					http.StatusForbidden,
 					http.StatusNotModified,
-					errors.StatusUnprocessableEntity,
+					apierrors.StatusUnprocessableEntity,
 					http.StatusSwitchingProtocols,
 				),
 			)
 		}
 		defer logger.Log()
+
 		// Dispatch to the internal handler
 		handler.ServeHTTP(w, req)
 	})

pkg/genericapiserver/genericapiserver.go

@@ -42,6 +42,7 @@ import (
 	"k8s.io/kubernetes/pkg/apimachinery"
 	"k8s.io/kubernetes/pkg/apimachinery/registered"
 	"k8s.io/kubernetes/pkg/apiserver"
+	"k8s.io/kubernetes/pkg/apiserver/request"
 	"k8s.io/kubernetes/pkg/genericapiserver/openapi"
 	"k8s.io/kubernetes/pkg/genericapiserver/openapi/common"
 	"k8s.io/kubernetes/pkg/genericapiserver/options"
@@ -187,8 +188,8 @@ func (s *GenericAPIServer) MinRequestTimeout() time.Duration {
 	return s.minRequestTimeout
 }
 
-func (s *GenericAPIServer) NewRequestInfoResolver() *apiserver.RequestInfoResolver {
+func (s *GenericAPIServer) NewRequestInfoResolver() *request.RequestInfoResolver {
-	return &apiserver.RequestInfoResolver{
+	return &request.RequestInfoResolver{
 		APIPrefixes:          sets.NewString(strings.Trim(s.legacyAPIPrefix, "/"), strings.Trim(s.apiPrefix, "/")), // all possible API prefixes
 		GrouplessAPIPrefixes: sets.NewString(strings.Trim(s.legacyAPIPrefix, "/")),                                 // APIPrefixes that won't have groups (legacy)
 	}
@@ -452,8 +453,6 @@ func (s *GenericAPIServer) getAPIGroupVersion(apiGroupInfo *APIGroupInfo, groupV
 
 func (s *GenericAPIServer) newAPIGroupVersion(apiGroupInfo *APIGroupInfo, groupVersion unversioned.GroupVersion) (*apiserver.APIGroupVersion, error) {
 	return &apiserver.APIGroupVersion{
-		RequestInfoResolver: s.NewRequestInfoResolver(),
-
 		GroupVersion: groupVersion,
 
 		ParameterCodec: apiGroupInfo.ParameterCodec,

pkg/master/master.go

@@ -787,7 +787,6 @@ func (m *Master) thirdpartyapi(group, kind, version, pluralResource string) *api
 	return &apiserver.APIGroupVersion{
 		Root:         apiRoot,
 		GroupVersion: externalVersion,
-		RequestInfoResolver: m.NewRequestInfoResolver(),
 
 		Creater:   thirdpartyresourcedata.NewObjectCreator(group, version, api.Scheme),
 		Convertor: api.Scheme,

pkg/master/master_test.go

@@ -47,7 +47,8 @@ import (
 	"k8s.io/kubernetes/pkg/apis/extensions"
 	extensionsapiv1beta1 "k8s.io/kubernetes/pkg/apis/extensions/v1beta1"
 	"k8s.io/kubernetes/pkg/apis/rbac"
-	"k8s.io/kubernetes/pkg/apiserver"
+	"k8s.io/kubernetes/pkg/apiserver/request"
+	"k8s.io/kubernetes/pkg/generated/openapi"
 	"k8s.io/kubernetes/pkg/genericapiserver"
 	"k8s.io/kubernetes/pkg/kubelet/client"
 	"k8s.io/kubernetes/pkg/registry/core/endpoint"
@@ -72,7 +73,6 @@ import (
 	"github.com/go-openapi/validate"
 	"github.com/stretchr/testify/assert"
 	"golang.org/x/net/context"
-	"k8s.io/kubernetes/pkg/generated/openapi"
 )
 
 // setUp is a convience function for setting up for (most) tests.
@@ -192,7 +192,7 @@ func TestNamespaceSubresources(t *testing.T) {
 	master, etcdserver, _, _ := newMaster(t)
 	defer etcdserver.Terminate(t)
 
-	expectedSubresources := apiserver.NamespaceSubResourcesForTest
+	expectedSubresources := request.NamespaceSubResourcesForTest
 	foundSubresources := sets.NewString()
 
 	for k := range master.v1ResourcesStorage {