Merge pull request #33478 from sttts/sttts-separate-apiserver-filters

Automatic merge from submit-queue

Separate handler filters in pkg/apiserver into pkg/apiserver/filters

... in order to make dependencies explicit towards better composability.

pkg/apiserver/apiserver.go

@@ -27,7 +27,6 @@ import (
 	"path"
 	rt "runtime"
 	"strconv"
-	"strings"
 	"time"
 
 	"k8s.io/kubernetes/pkg/admission"
@@ -210,22 +209,6 @@ func logStackOnRecover(s runtime.NegotiatedSerializer, panicReason interface{},
 	errorNegotiated(apierrors.NewGenericServerResponse(http.StatusInternalServerError, "", api.Resource(""), "", "", 0, false), s, unversioned.GroupVersion{}, w, &http.Request{Header: headers})
 }
 
-func InstallServiceErrorHandler(s runtime.NegotiatedSerializer, container *restful.Container) {
-	container.ServiceErrorHandler(func(serviceErr restful.ServiceError, request *restful.Request, response *restful.Response) {
-		serviceErrorHandler(s, serviceErr, request, response)
-	})
-}
-
-func serviceErrorHandler(s runtime.NegotiatedSerializer, serviceErr restful.ServiceError, request *restful.Request, response *restful.Response) {
-	errorNegotiated(
-		apierrors.NewGenericServerResponse(serviceErr.Code, "", api.Resource(""), "", serviceErr.Message, 0, false),
-		s,
-		unversioned.GroupVersion{},
-		response.ResponseWriter,
-		request.Request,
-	)
-}
-
 // Adds a service to return the supported api versions at the legacy /api.
 func AddApiWebService(s runtime.NegotiatedSerializer, container *restful.Container, apiPrefix string, getAPIVersionsFunc func(req *restful.Request) *unversioned.APIVersions) {
 	// TODO: InstallREST should register each version automatically
@@ -501,12 +484,3 @@ func readBody(req *http.Request) ([]byte, error) {
 	defer req.Body.Close()
 	return ioutil.ReadAll(req.Body)
 }
-
-// splitPath returns the segments for a URL path.
-func splitPath(path string) []string {
-	path = strings.Trim(path, "/")
-	if path == "" {
-		return []string{}
-	}
-	return strings.Split(path, "/")
-}

pkg/apiserver/apiserver_test.go

@@ -44,7 +44,6 @@ import (
 	"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"
@@ -252,10 +251,6 @@ func handleLinker(storage map[string]rest.Storage, selfLinker runtime.SelfLinker
 	return handleInternal(storage, admissionControl, selfLinker)
 }
 
-func newTestRequestInfoResolver() *RequestInfoResolver {
-	return &RequestInfoResolver{sets.NewString("api", "apis"), sets.NewString("api")}
-}
-
 func handleInternal(storage map[string]rest.Storage, admissionControl admission.Interface, selfLinker runtime.SelfLinker) http.Handler {
 	container := restful.NewContainer()
 	container.Router(restful.CurlyRouter{})

pkg/apiserver/errors.go

@@ -76,25 +76,6 @@ func notFound(w http.ResponseWriter, req *http.Request) {
 	fmt.Fprintf(w, "Not Found: %#v", req.RequestURI)
 }
 
-// badGatewayError renders a simple bad gateway error.
-func badGatewayError(w http.ResponseWriter, req *http.Request) {
-	w.WriteHeader(http.StatusBadGateway)
-	fmt.Fprintf(w, "Bad Gateway: %#v", req.RequestURI)
-}
-
-// forbidden renders a simple forbidden error
-func forbidden(w http.ResponseWriter, req *http.Request) {
-	w.WriteHeader(http.StatusForbidden)
-	fmt.Fprintf(w, "Forbidden: %#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

@@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-package audit
+package filters
 
 import (
 	"bufio"
@@ -27,7 +27,6 @@ import (
 	"github.com/golang/glog"
 	"github.com/pborman/uuid"
 
-	"k8s.io/kubernetes/pkg/apiserver"
 	utilnet "k8s.io/kubernetes/pkg/util/net"
 )
 
@@ -85,7 +84,7 @@ var _ http.Hijacker = &fancyResponseWriterDelegator{}
 // 2. the response line containing:
 //    - the unique id from 1
 //    - response code
-func WithAudit(handler http.Handler, attributeGetter apiserver.RequestAttributeGetter, out io.Writer) http.Handler {
+func WithAudit(handler http.Handler, attributeGetter RequestAttributeGetter, out io.Writer) http.Handler {
 	if out == nil {
 		return handler
 	}

pkg/apiserver/filters/audit_test.go

@@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-package audit
+package filters
 
 import (
 	"bufio"
@@ -85,7 +85,7 @@ func (*fakeRequestContextMapper) Update(req *http.Request, context api.Context)
 
 func TestAudit(t *testing.T) {
 	var buf bytes.Buffer
-	attributeGetter := apiserver.NewRequestAttributeGetter(&fakeRequestContextMapper{},
+	attributeGetter := NewRequestAttributeGetter(&fakeRequestContextMapper{},
 		&apiserver.RequestInfoResolver{APIPrefixes: sets.NewString("api", "apis"), GrouplessAPIPrefixes: sets.NewString("api")})
 	handler := WithAudit(&fakeHTTPHandler{}, attributeGetter, &buf)
 	req, _ := http.NewRequest("GET", "/api/v1/namespaces/default/pods", nil)

pkg/apiserver/filters/authorization.go

@@ -0,0 +1,91 @@
+/*
+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 (
+	"net/http"
+
+	"github.com/golang/glog"
+
+	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/apiserver"
+	"k8s.io/kubernetes/pkg/auth/authorizer"
+)
+
+// WithAuthorizationCheck passes all authorized requests on to handler, and returns a forbidden error otherwise.
+func WithAuthorization(handler http.Handler, getAttribs RequestAttributeGetter, a authorizer.Authorizer) http.Handler {
+	if a == nil {
+		glog.Warningf("Authorization is disabled")
+		return handler
+	}
+	return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
+		authorized, reason, err := a.Authorize(getAttribs.GetAttribs(req))
+		if err != nil {
+			internalError(w, req, err)
+			return
+		}
+		if !authorized {
+			glog.V(4).Infof("Forbidden: %#v, Reason: %s", req.RequestURI, reason)
+			forbidden(w, req)
+			return
+		}
+		handler.ServeHTTP(w, req)
+	})
+}
+
+// RequestAttributeGetter is a function that extracts authorizer.Attributes from an http.Request
+type RequestAttributeGetter interface {
+	GetAttribs(req *http.Request) (attribs authorizer.Attributes)
+}
+
+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 {
+	return &requestAttributeGetter{requestContextMapper, requestInfoResolver}
+}
+
+func (r *requestAttributeGetter) GetAttribs(req *http.Request) authorizer.Attributes {
+	attribs := authorizer.AttributesRecord{}
+
+	ctx, ok := r.requestContextMapper.Get(req)
+	if ok {
+		user, ok := api.UserFrom(ctx)
+		if ok {
+			attribs.User = user
+		}
+	}
+
+	requestInfo, _ := r.requestInfoResolver.GetRequestInfo(req)
+
+	// Start with common attributes that apply to resource and non-resource requests
+	attribs.ResourceRequest = requestInfo.IsResourceRequest
+	attribs.Path = requestInfo.Path
+	attribs.Verb = requestInfo.Verb
+
+	attribs.APIGroup = requestInfo.APIGroup
+	attribs.APIVersion = requestInfo.APIVersion
+	attribs.Resource = requestInfo.Resource
+	attribs.Subresource = requestInfo.Subresource
+	attribs.Namespace = requestInfo.Namespace
+	attribs.Name = requestInfo.Name
+
+	return &attribs
+}

pkg/apiserver/filters/authorization_test.go

@@ -0,0 +1,111 @@
+/*
+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 (
+	"net/http"
+	"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")}}
+
+	testcases := map[string]struct {
+		Verb               string
+		Path               string
+		ExpectedAttributes *authorizer.AttributesRecord
+	}{
+		"non-resource root": {
+			Verb: "POST",
+			Path: "/",
+			ExpectedAttributes: &authorizer.AttributesRecord{
+				Verb: "post",
+				Path: "/",
+			},
+		},
+		"non-resource api prefix": {
+			Verb: "GET",
+			Path: "/api/",
+			ExpectedAttributes: &authorizer.AttributesRecord{
+				Verb: "get",
+				Path: "/api/",
+			},
+		},
+		"non-resource group api prefix": {
+			Verb: "GET",
+			Path: "/apis/extensions/",
+			ExpectedAttributes: &authorizer.AttributesRecord{
+				Verb: "get",
+				Path: "/apis/extensions/",
+			},
+		},
+
+		"resource": {
+			Verb: "POST",
+			Path: "/api/v1/nodes/mynode",
+			ExpectedAttributes: &authorizer.AttributesRecord{
+				Verb:            "create",
+				Path:            "/api/v1/nodes/mynode",
+				ResourceRequest: true,
+				Resource:        "nodes",
+				APIVersion:      "v1",
+				Name:            "mynode",
+			},
+		},
+		"namespaced resource": {
+			Verb: "PUT",
+			Path: "/api/v1/namespaces/myns/pods/mypod",
+			ExpectedAttributes: &authorizer.AttributesRecord{
+				Verb:            "update",
+				Path:            "/api/v1/namespaces/myns/pods/mypod",
+				ResourceRequest: true,
+				Namespace:       "myns",
+				Resource:        "pods",
+				APIVersion:      "v1",
+				Name:            "mypod",
+			},
+		},
+		"API group resource": {
+			Verb: "GET",
+			Path: "/apis/extensions/v1beta1/namespaces/myns/jobs",
+			ExpectedAttributes: &authorizer.AttributesRecord{
+				Verb:            "list",
+				Path:            "/apis/extensions/v1beta1/namespaces/myns/jobs",
+				ResourceRequest: true,
+				APIGroup:        extensions.GroupName,
+				APIVersion:      "v1beta1",
+				Namespace:       "myns",
+				Resource:        "jobs",
+			},
+		},
+	}
+
+	for k, tc := range testcases {
+		req, _ := http.NewRequest(tc.Verb, tc.Path, nil)
+		attribs := r.GetAttribs(req)
+		if !reflect.DeepEqual(attribs, tc.ExpectedAttributes) {
+			t.Errorf("%s: expected\n\t%#v\ngot\n\t%#v", k, tc.ExpectedAttributes, attribs)
+		}
+	}
+}

pkg/apiserver/filters/doc.go

@@ -0,0 +1,19 @@
+/*
+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 contains all the http handler chain filters which
+// _are_ api related.
+package filters // import "k8s.io/kubernetes/pkg/apiserver/filters"

pkg/apiserver/filters/errors.go

@@ -0,0 +1,43 @@
+/*
+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 filters
+
+import (
+	"fmt"
+	"net/http"
+
+	"k8s.io/kubernetes/pkg/util/runtime"
+)
+
+// badGatewayError renders a simple bad gateway error.
+func badGatewayError(w http.ResponseWriter, req *http.Request) {
+	w.WriteHeader(http.StatusBadGateway)
+	fmt.Fprintf(w, "Bad Gateway: %#v", req.RequestURI)
+}
+
+// forbidden renders a simple forbidden error
+func forbidden(w http.ResponseWriter, req *http.Request) {
+	w.WriteHeader(http.StatusForbidden)
+	fmt.Fprintf(w, "Forbidden: %#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)
+}

pkg/apiserver/filters/impersonation.go

@@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-package apiserver
+package filters
 
 import (
 	"fmt"

pkg/apiserver/filters/impersonation_test.go

@@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
 limitations under the License.
 */
 
-package apiserver
+package filters
 
 import (
 	"fmt"
@@ -264,7 +264,7 @@ func TestImpersonationFilter(t *testing.T) {
 		},
 	}
 
-	requestContextMapper = api.NewRequestContextMapper()
+	requestContextMapper := api.NewRequestContextMapper()
 	var ctx api.Context
 	var actualUser user.Info
 	var lock sync.Mutex

pkg/apiserver/requestinfo.go

@@ -1,5 +1,5 @@
 /*
-Copyright 2014 The Kubernetes Authors.
+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.
@@ -19,156 +19,12 @@ package apiserver
 import (
 	"fmt"
 	"net/http"
-	"runtime/debug"
 	"strings"
 
-	"github.com/golang/glog"
 	"k8s.io/kubernetes/pkg/api"
-	"k8s.io/kubernetes/pkg/api/errors"
-	"k8s.io/kubernetes/pkg/auth/authorizer"
-	"k8s.io/kubernetes/pkg/httplog"
-	"k8s.io/kubernetes/pkg/util/runtime"
 	"k8s.io/kubernetes/pkg/util/sets"
 )
 
-// specialVerbs contains just strings which are used in REST paths for special actions that don't fall under the normal
-// CRUDdy GET/POST/PUT/DELETE actions on REST objects.
-// TODO: find a way to keep this up to date automatically.  Maybe dynamically populate list as handlers added to
-// master's Mux.
-var specialVerbs = sets.NewString("proxy", "redirect", "watch")
-
-// specialVerbsNoSubresources contains root verbs which do not allow subresources
-var specialVerbsNoSubresources = sets.NewString("proxy", "redirect")
-
-// namespaceSubresources contains subresources of namespace
-// this list allows the parser to distinguish between a namespace subresource, and a namespaced resource
-var namespaceSubresources = sets.NewString("status", "finalize")
-
-// NamespaceSubResourcesForTest exports namespaceSubresources for testing in pkg/master/master_test.go, so we never drift
-var NamespaceSubResourcesForTest = sets.NewString(namespaceSubresources.List()...)
-
-// IsReadOnlyReq() is true for any (or at least many) request which has no observable
-// side effects on state of apiserver (though there may be internal side effects like
-// caching and logging).
-func IsReadOnlyReq(req http.Request) bool {
-	if req.Method == "GET" {
-		// TODO: add OPTIONS and HEAD if we ever support those.
-		return true
-	}
-	return false
-}
-
-// ReadOnly passes all GET requests on to handler, and returns an error on all other requests.
-func ReadOnly(handler http.Handler) http.Handler {
-	return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
-		if IsReadOnlyReq(*req) {
-			handler.ServeHTTP(w, req)
-			return
-		}
-		w.WriteHeader(http.StatusForbidden)
-		fmt.Fprintf(w, "This is a read-only endpoint.")
-	})
-}
-
-// RecoverPanics wraps an http Handler to recover and log panics.
-func RecoverPanics(handler http.Handler, resolver *RequestInfoResolver) 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)
-			glog.Errorf("APIServer panic'd on %v %v: %v\n%s\n", req.Method, req.RequestURI, err, debug.Stack())
-		})
-
-		logger := httplog.NewLogged(req, &w)
-		requestInfo, err := resolver.GetRequestInfo(req)
-		if err != nil || requestInfo.Verb != "proxy" {
-			logger.StacktraceWhen(
-				httplog.StatusIsNot(
-					http.StatusOK,
-					http.StatusCreated,
-					http.StatusAccepted,
-					http.StatusBadRequest,
-					http.StatusMovedPermanently,
-					http.StatusTemporaryRedirect,
-					http.StatusConflict,
-					http.StatusNotFound,
-					http.StatusUnauthorized,
-					http.StatusForbidden,
-					http.StatusNotModified,
-					errors.StatusUnprocessableEntity,
-					http.StatusSwitchingProtocols,
-				),
-			)
-		}
-		defer logger.Log()
-		// Dispatch to the internal handler
-		handler.ServeHTTP(w, req)
-	})
-}
-
-// RequestAttributeGetter is a function that extracts authorizer.Attributes from an http.Request
-type RequestAttributeGetter interface {
-	GetAttribs(req *http.Request) (attribs authorizer.Attributes)
-}
-
-type requestAttributeGetter struct {
-	requestContextMapper api.RequestContextMapper
-	requestInfoResolver  *RequestInfoResolver
-}
-
-// NewAttributeGetter returns an object which implements the RequestAttributeGetter interface.
-func NewRequestAttributeGetter(requestContextMapper api.RequestContextMapper, requestInfoResolver *RequestInfoResolver) RequestAttributeGetter {
-	return &requestAttributeGetter{requestContextMapper, requestInfoResolver}
-}
-
-func (r *requestAttributeGetter) GetAttribs(req *http.Request) authorizer.Attributes {
-	attribs := authorizer.AttributesRecord{}
-
-	ctx, ok := r.requestContextMapper.Get(req)
-	if ok {
-		user, ok := api.UserFrom(ctx)
-		if ok {
-			attribs.User = user
-		}
-	}
-
-	requestInfo, _ := r.requestInfoResolver.GetRequestInfo(req)
-
-	// Start with common attributes that apply to resource and non-resource requests
-	attribs.ResourceRequest = requestInfo.IsResourceRequest
-	attribs.Path = requestInfo.Path
-	attribs.Verb = requestInfo.Verb
-
-	attribs.APIGroup = requestInfo.APIGroup
-	attribs.APIVersion = requestInfo.APIVersion
-	attribs.Resource = requestInfo.Resource
-	attribs.Subresource = requestInfo.Subresource
-	attribs.Namespace = requestInfo.Namespace
-	attribs.Name = requestInfo.Name
-
-	return &attribs
-}
-
-// WithAuthorizationCheck passes all authorized requests on to handler, and returns a forbidden error otherwise.
-func WithAuthorization(handler http.Handler, getAttribs RequestAttributeGetter, a authorizer.Authorizer) http.Handler {
-	if a == nil {
-		glog.Warningf("Authorization is disabled")
-		return handler
-	}
-	return http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
-		authorized, reason, err := a.Authorize(getAttribs.GetAttribs(req))
-		if err != nil {
-			internalError(w, req, err)
-			return
-		}
-		if !authorized {
-			glog.V(4).Infof("Forbidden: %#v, Reason: %s", req.RequestURI, reason)
-			forbidden(w, req)
-			return
-		}
-		handler.ServeHTTP(w, req)
-	})
-}
-
 // RequestInfo holds information parsed from the http.Request
 type RequestInfo struct {
 	// IsResourceRequest indicates whether or not the request is for an API resource or subresource
@@ -195,6 +51,22 @@ type RequestInfo struct {
 	Parts []string
 }
 
+// specialVerbs contains just strings which are used in REST paths for special actions that don't fall under the normal
+// CRUDdy GET/POST/PUT/DELETE actions on REST objects.
+// TODO: find a way to keep this up to date automatically.  Maybe dynamically populate list as handlers added to
+// master's Mux.
+var specialVerbs = sets.NewString("proxy", "redirect", "watch")
+
+// specialVerbsNoSubresources contains root verbs which do not allow subresources
+var specialVerbsNoSubresources = sets.NewString("proxy", "redirect")
+
+// namespaceSubresources contains subresources of namespace
+// this list allows the parser to distinguish between a namespace subresource, and a namespaced resource
+var namespaceSubresources = sets.NewString("status", "finalize")
+
+// NamespaceSubResourcesForTest exports namespaceSubresources for testing in pkg/master/master_test.go, so we never drift
+var NamespaceSubResourcesForTest = sets.NewString(namespaceSubresources.List()...)
+
 type RequestInfoResolver struct {
 	APIPrefixes          sets.String
 	GrouplessAPIPrefixes sets.String
@@ -334,3 +206,12 @@ func (r *RequestInfoResolver) GetRequestInfo(req *http.Request) (RequestInfo, er
 
 	return requestInfo, nil
 }
+
+// splitPath returns the segments for a URL path.
+func splitPath(path string) []string {
+	path = strings.Trim(path, "/")
+	if path == "" {
+		return []string{}
+	}
+	return strings.Split(path, "/")
+}

pkg/apiserver/requestinfo_test.go

@@ -18,14 +18,11 @@ package apiserver
 
 import (
 	"net/http"
-	"net/http/httptest"
 	"reflect"
 	"testing"
 
 	"k8s.io/kubernetes/pkg/api"
 	"k8s.io/kubernetes/pkg/api/testapi"
-	"k8s.io/kubernetes/pkg/apis/extensions"
-	"k8s.io/kubernetes/pkg/auth/authorizer"
 	"k8s.io/kubernetes/pkg/util/sets"
 )
 
@@ -43,106 +40,6 @@ func pathWithPrefix(prefix, resource, namespace, name string) string {
 	return testapi.Default.ResourcePathWithPrefix(prefix, resource, namespace, name)
 }
 
-func TestReadOnly(t *testing.T) {
-	server := httptest.NewServer(ReadOnly(http.HandlerFunc(
-		func(w http.ResponseWriter, req *http.Request) {
-			if req.Method != "GET" {
-				t.Errorf("Unexpected call: %v", req.Method)
-			}
-		},
-	)))
-	defer server.Close()
-	for _, verb := range []string{"GET", "POST", "PUT", "DELETE", "CREATE"} {
-		req, err := http.NewRequest(verb, server.URL, nil)
-		if err != nil {
-			t.Fatalf("Couldn't make request: %v", err)
-		}
-		http.DefaultClient.Do(req)
-	}
-}
-
-func TestGetAttribs(t *testing.T) {
-	r := &requestAttributeGetter{api.NewRequestContextMapper(), &RequestInfoResolver{sets.NewString("api", "apis"), sets.NewString("api")}}
-
-	testcases := map[string]struct {
-		Verb               string
-		Path               string
-		ExpectedAttributes *authorizer.AttributesRecord
-	}{
-		"non-resource root": {
-			Verb: "POST",
-			Path: "/",
-			ExpectedAttributes: &authorizer.AttributesRecord{
-				Verb: "post",
-				Path: "/",
-			},
-		},
-		"non-resource api prefix": {
-			Verb: "GET",
-			Path: "/api/",
-			ExpectedAttributes: &authorizer.AttributesRecord{
-				Verb: "get",
-				Path: "/api/",
-			},
-		},
-		"non-resource group api prefix": {
-			Verb: "GET",
-			Path: "/apis/extensions/",
-			ExpectedAttributes: &authorizer.AttributesRecord{
-				Verb: "get",
-				Path: "/apis/extensions/",
-			},
-		},
-
-		"resource": {
-			Verb: "POST",
-			Path: "/api/v1/nodes/mynode",
-			ExpectedAttributes: &authorizer.AttributesRecord{
-				Verb:            "create",
-				Path:            "/api/v1/nodes/mynode",
-				ResourceRequest: true,
-				Resource:        "nodes",
-				APIVersion:      "v1",
-				Name:            "mynode",
-			},
-		},
-		"namespaced resource": {
-			Verb: "PUT",
-			Path: "/api/v1/namespaces/myns/pods/mypod",
-			ExpectedAttributes: &authorizer.AttributesRecord{
-				Verb:            "update",
-				Path:            "/api/v1/namespaces/myns/pods/mypod",
-				ResourceRequest: true,
-				Namespace:       "myns",
-				Resource:        "pods",
-				APIVersion:      "v1",
-				Name:            "mypod",
-			},
-		},
-		"API group resource": {
-			Verb: "GET",
-			Path: "/apis/extensions/v1beta1/namespaces/myns/jobs",
-			ExpectedAttributes: &authorizer.AttributesRecord{
-				Verb:            "list",
-				Path:            "/apis/extensions/v1beta1/namespaces/myns/jobs",
-				ResourceRequest: true,
-				APIGroup:        extensions.GroupName,
-				APIVersion:      "v1beta1",
-				Namespace:       "myns",
-				Resource:        "jobs",
-			},
-		},
-	}
-
-	for k, tc := range testcases {
-		req, _ := http.NewRequest(tc.Verb, tc.Path, nil)
-		attribs := r.GetAttribs(req)
-		if !reflect.DeepEqual(attribs, tc.ExpectedAttributes) {
-			t.Errorf("%s: expected\n\t%#v\ngot\n\t%#v", k, tc.ExpectedAttributes, attribs)
-		}
-	}
-}
-
 func TestGetAPIRequestInfo(t *testing.T) {
 	successCases := []struct {
 		method              string
@@ -202,12 +99,12 @@ func TestGetAPIRequestInfo(t *testing.T) {
 		{"POST", "/apis/extensions/v1beta3/namespaces/other/pods", "create", "api", "extensions", "v1beta3", "other", "pods", "", "", []string{"pods"}},
 	}
 
-	requestInfoResolver := newTestRequestInfoResolver()
+	resolver := newTestRequestInfoResolver()
 
 	for _, successCase := range successCases {
 		req, _ := http.NewRequest(successCase.method, successCase.url, nil)
 
-		apiRequestInfo, err := requestInfoResolver.GetRequestInfo(req)
+		apiRequestInfo, err := resolver.GetRequestInfo(req)
 		if err != nil {
 			t.Errorf("Unexpected error for url: %s %v", successCase.url, err)
 		}
@@ -250,7 +147,7 @@ func TestGetAPIRequestInfo(t *testing.T) {
 		if err != nil {
 			t.Errorf("Unexpected error %v", err)
 		}
-		apiRequestInfo, err := requestInfoResolver.GetRequestInfo(req)
+		apiRequestInfo, err := resolver.GetRequestInfo(req)
 		if err != nil {
 			t.Errorf("%s: Unexpected error %v", k, err)
 		}
@@ -281,12 +178,12 @@ func TestGetNonAPIRequestInfo(t *testing.T) {
 		"empty":                        {"", false},
 	}
 
-	requestInfoResolver := newTestRequestInfoResolver()
+	resolver := newTestRequestInfoResolver()
 
 	for testName, tc := range tests {
 		req, _ := http.NewRequest("GET", tc.url, nil)
 
-		apiRequestInfo, err := requestInfoResolver.GetRequestInfo(req)
+		apiRequestInfo, err := resolver.GetRequestInfo(req)
 		if err != nil {
 			t.Errorf("%s: Unexpected error %v", testName, err)
 		}
@@ -295,3 +192,7 @@ func TestGetNonAPIRequestInfo(t *testing.T) {
 		}
 	}
 }
+
+func newTestRequestInfoResolver() *RequestInfoResolver {
+	return &RequestInfoResolver{sets.NewString("api", "apis"), sets.NewString("api")}
+}

pkg/apiserver/serviceerror.go

@@ -0,0 +1,42 @@
+/*
+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 apiserver
+
+import (
+	"github.com/emicklei/go-restful"
+
+	"k8s.io/kubernetes/pkg/api"
+	apierrors "k8s.io/kubernetes/pkg/api/errors"
+	"k8s.io/kubernetes/pkg/api/unversioned"
+	"k8s.io/kubernetes/pkg/runtime"
+)
+
+func InstallServiceErrorHandler(s runtime.NegotiatedSerializer, container *restful.Container) {
+	container.ServiceErrorHandler(func(serviceErr restful.ServiceError, request *restful.Request, response *restful.Response) {
+		serviceErrorHandler(s, serviceErr, request, response)
+	})
+}
+
+func serviceErrorHandler(s runtime.NegotiatedSerializer, serviceErr restful.ServiceError, request *restful.Request, response *restful.Response) {
+	errorNegotiated(
+		apierrors.NewGenericServerResponse(serviceErr.Code, "", api.Resource(""), "", serviceErr.Message, 0, false),
+		s,
+		unversioned.GroupVersion{},
+		response.ResponseWriter,
+		request.Request,
+	)
+}

pkg/genericapiserver/config.go

@@ -36,7 +36,7 @@ import (
 	"k8s.io/kubernetes/pkg/api"
 	"k8s.io/kubernetes/pkg/api/unversioned"
 	"k8s.io/kubernetes/pkg/apiserver"
-	"k8s.io/kubernetes/pkg/apiserver/audit"
+	apiserverfilters "k8s.io/kubernetes/pkg/apiserver/filters"
 	"k8s.io/kubernetes/pkg/auth/authenticator"
 	"k8s.io/kubernetes/pkg/auth/authorizer"
 	authhandlers "k8s.io/kubernetes/pkg/auth/handlers"
@@ -363,19 +363,17 @@ func (s *GenericAPIServer) buildHandlerChains(c *Config, handler http.Handler) (
 
 	// insecure filters
 	insecure = handler
-	insecure = api.WithRequestContext(insecure, c.RequestContextMapper)
-	insecure = apiserver.RecoverPanics(insecure, s.NewRequestInfoResolver())
+	insecure = genericfilters.WithPanicRecovery(insecure, s.NewRequestInfoResolver())
 	insecure = genericfilters.WithTimeoutForNonLongRunningRequests(insecure, longRunningFunc)
 
 	// secure filters
-	attributeGetter := apiserver.NewRequestAttributeGetter(c.RequestContextMapper, s.NewRequestInfoResolver())
+	attributeGetter := apiserverfilters.NewRequestAttributeGetter(c.RequestContextMapper, s.NewRequestInfoResolver())
 	secure = handler
-	secure = apiserver.WithAuthorization(secure, attributeGetter, c.Authorizer)
-	secure = apiserver.WithImpersonation(secure, c.RequestContextMapper, c.Authorizer)
-	secure = audit.WithAudit(secure, attributeGetter, s.auditWriter) // before impersonation to read original user
+	secure = apiserverfilters.WithAuthorization(secure, attributeGetter, c.Authorizer)
+	secure = apiserverfilters.WithImpersonation(secure, c.RequestContextMapper, c.Authorizer)
+	secure = apiserverfilters.WithAudit(secure, attributeGetter, s.auditWriter) // before impersonation to read original user
 	secure = authhandlers.WithAuthentication(secure, c.RequestContextMapper, c.Authenticator, authhandlers.Unauthorized(c.SupportsBasicAuth))
-	secure = api.WithRequestContext(secure, c.RequestContextMapper)
-	secure = apiserver.RecoverPanics(secure, s.NewRequestInfoResolver())
+	secure = genericfilters.WithPanicRecovery(secure, s.NewRequestInfoResolver())
 	secure = genericfilters.WithTimeoutForNonLongRunningRequests(secure, longRunningFunc)
 	secure = genericfilters.WithMaxInFlightLimit(secure, c.MaxRequestsInFlight, longRunningFunc)
 

pkg/genericapiserver/filters/panics.go

@@ -0,0 +1,64 @@
+/*
+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 (
+	"net/http"
+	"runtime/debug"
+
+	"github.com/golang/glog"
+
+	"k8s.io/kubernetes/pkg/api/errors"
+	"k8s.io/kubernetes/pkg/apiserver"
+	"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 {
+	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)
+			glog.Errorf("APIServer panic'd on %v %v: %v\n%s\n", req.Method, req.RequestURI, err, debug.Stack())
+		})
+
+		logger := httplog.NewLogged(req, &w)
+		requestInfo, err := resolver.GetRequestInfo(req)
+		if err != nil || requestInfo.Verb != "proxy" {
+			logger.StacktraceWhen(
+				httplog.StatusIsNot(
+					http.StatusOK,
+					http.StatusCreated,
+					http.StatusAccepted,
+					http.StatusBadRequest,
+					http.StatusMovedPermanently,
+					http.StatusTemporaryRedirect,
+					http.StatusConflict,
+					http.StatusNotFound,
+					http.StatusUnauthorized,
+					http.StatusForbidden,
+					http.StatusNotModified,
+					errors.StatusUnprocessableEntity,
+					http.StatusSwitchingProtocols,
+				),
+			)
+		}
+		defer logger.Log()
+		// Dispatch to the internal handler
+		handler.ServeHTTP(w, req)
+	})
+}