96 lines
3.1 KiB
Go
96 lines
3.1 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package mux
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import (
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"bytes"
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"fmt"
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"net/http"
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rt "runtime"
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"github.com/emicklei/go-restful"
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"github.com/golang/glog"
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apierrors "k8s.io/apimachinery/pkg/api/errors"
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"k8s.io/apimachinery/pkg/runtime"
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"k8s.io/apimachinery/pkg/runtime/schema"
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"k8s.io/kubernetes/pkg/api"
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"k8s.io/kubernetes/pkg/genericapiserver/api/handlers/responsewriters"
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)
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// APIContainer is a restful container which in addition support registering
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// handlers that do not show up in swagger or in /
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type APIContainer struct {
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*restful.Container
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// NonSwaggerRoutes are recorded and are visible at /, but do not show up in Swagger.
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NonSwaggerRoutes PathRecorderMux
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// UnlistedRoutes are not recorded, therefore not visible at / and do not show up in Swagger.
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UnlistedRoutes *http.ServeMux
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}
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// NewAPIContainer constructs a new container for APIs
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func NewAPIContainer(mux *http.ServeMux, s runtime.NegotiatedSerializer) *APIContainer {
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c := APIContainer{
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Container: restful.NewContainer(),
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NonSwaggerRoutes: PathRecorderMux{
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mux: mux,
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},
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UnlistedRoutes: mux,
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}
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c.Container.ServeMux = mux
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c.Container.Router(restful.CurlyRouter{}) // e.g. for proxy/{kind}/{name}/{*}
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c.Container.RecoverHandler(func(panicReason interface{}, httpWriter http.ResponseWriter) {
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logStackOnRecover(s, panicReason, httpWriter)
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})
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c.Container.ServiceErrorHandler(func(serviceErr restful.ServiceError, request *restful.Request, response *restful.Response) {
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serviceErrorHandler(s, serviceErr, request, response)
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})
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return &c
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}
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//TODO: Unify with RecoverPanics?
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func logStackOnRecover(s runtime.NegotiatedSerializer, panicReason interface{}, w http.ResponseWriter) {
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var buffer bytes.Buffer
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buffer.WriteString(fmt.Sprintf("recover from panic situation: - %v\r\n", panicReason))
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for i := 2; ; i++ {
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_, file, line, ok := rt.Caller(i)
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if !ok {
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break
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}
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buffer.WriteString(fmt.Sprintf(" %s:%d\r\n", file, line))
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}
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glog.Errorln(buffer.String())
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headers := http.Header{}
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if ct := w.Header().Get("Content-Type"); len(ct) > 0 {
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headers.Set("Accept", ct)
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}
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responsewriters.ErrorNegotiated(apierrors.NewGenericServerResponse(http.StatusInternalServerError, "", api.Resource(""), "", "", 0, false), s, schema.GroupVersion{}, w, &http.Request{Header: headers})
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}
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func serviceErrorHandler(s runtime.NegotiatedSerializer, serviceErr restful.ServiceError, request *restful.Request, resp *restful.Response) {
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responsewriters.ErrorNegotiated(
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apierrors.NewGenericServerResponse(serviceErr.Code, "", api.Resource(""), "", serviceErr.Message, 0, false),
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s,
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schema.GroupVersion{},
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resp,
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request.Request,
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)
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}
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