Example #1
0
// getResourceHandler is an HTTP handler function for get requests. It delegates to the
// passed-in getterFunc to perform the actual get.
func getResourceHandler(scope RequestScope, getter getterFunc) restful.RouteFunction {
	return func(req *restful.Request, res *restful.Response) {
		w := res.ResponseWriter
		namespace, name, err := scope.Namer.Name(req)
		if err != nil {
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}
		ctx := scope.ContextFunc(req)
		ctx = request.WithNamespace(ctx, namespace)

		result, err := getter(ctx, name, req)
		if err != nil {
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}
		if err := setSelfLink(result, req, scope.Namer); err != nil {
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}
		responsewriters.WriteObject(http.StatusOK, scope.Kind.GroupVersion(), scope.Serializer, result, w, req.Request)
	}
}
Example #2
0
// DeleteResource returns a function that will handle a resource deletion
func DeleteResource(r rest.GracefulDeleter, allowsOptions bool, scope RequestScope, admit admission.Interface) restful.RouteFunction {
	return func(req *restful.Request, res *restful.Response) {
		// For performance tracking purposes.
		trace := util.NewTrace("Delete " + req.Request.URL.Path)
		defer trace.LogIfLong(500 * time.Millisecond)

		w := res.ResponseWriter

		// TODO: we either want to remove timeout or document it (if we document, move timeout out of this function and declare it in api_installer)
		timeout := parseTimeout(req.Request.URL.Query().Get("timeout"))

		namespace, name, err := scope.Namer.Name(req)
		if err != nil {
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}
		ctx := scope.ContextFunc(req)
		ctx = request.WithNamespace(ctx, namespace)

		options := &api.DeleteOptions{}
		if allowsOptions {
			body, err := readBody(req.Request)
			if err != nil {
				scope.err(err, res.ResponseWriter, req.Request)
				return
			}
			if len(body) > 0 {
				s, err := negotiation.NegotiateInputSerializer(req.Request, scope.Serializer)
				if err != nil {
					scope.err(err, res.ResponseWriter, req.Request)
					return
				}
				defaultGVK := scope.Kind.GroupVersion().WithKind("DeleteOptions")
				obj, _, err := scope.Serializer.DecoderToVersion(s.Serializer, defaultGVK.GroupVersion()).Decode(body, &defaultGVK, options)
				if err != nil {
					scope.err(err, res.ResponseWriter, req.Request)
					return
				}
				if obj != options {
					scope.err(fmt.Errorf("decoded object cannot be converted to DeleteOptions"), res.ResponseWriter, req.Request)
					return
				}
			} else {
				if values := req.Request.URL.Query(); len(values) > 0 {
					if err := scope.ParameterCodec.DecodeParameters(values, scope.Kind.GroupVersion(), options); err != nil {
						scope.err(err, res.ResponseWriter, req.Request)
						return
					}
				}
			}
		}

		if admit != nil && admit.Handles(admission.Delete) {
			userInfo, _ := request.UserFrom(ctx)

			err = admit.Admit(admission.NewAttributesRecord(nil, nil, scope.Kind, namespace, name, scope.Resource, scope.Subresource, admission.Delete, userInfo))
			if err != nil {
				scope.err(err, res.ResponseWriter, req.Request)
				return
			}
		}

		trace.Step("About do delete object from database")
		result, err := finishRequest(timeout, func() (runtime.Object, error) {
			return r.Delete(ctx, name, options)
		})
		if err != nil {
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}
		trace.Step("Object deleted from database")

		// if the rest.Deleter returns a nil object, fill out a status. Callers may return a valid
		// object with the response.
		if result == nil {
			result = &metav1.Status{
				Status: metav1.StatusSuccess,
				Code:   http.StatusOK,
				Details: &metav1.StatusDetails{
					Name: name,
					Kind: scope.Kind.Kind,
				},
			}
		} else {
			// when a non-status response is returned, set the self link
			if _, ok := result.(*metav1.Status); !ok {
				if err := setSelfLink(result, req, scope.Namer); err != nil {
					scope.err(err, res.ResponseWriter, req.Request)
					return
				}
			}
		}
		responsewriters.WriteObject(http.StatusOK, scope.Kind.GroupVersion(), scope.Serializer, result, w, req.Request)
	}
}
Example #3
0
// UpdateResource returns a function that will handle a resource update
func UpdateResource(r rest.Updater, scope RequestScope, typer runtime.ObjectTyper, admit admission.Interface) restful.RouteFunction {
	return func(req *restful.Request, res *restful.Response) {
		// For performance tracking purposes.
		trace := util.NewTrace("Update " + req.Request.URL.Path)
		defer trace.LogIfLong(500 * time.Millisecond)

		w := res.ResponseWriter

		// TODO: we either want to remove timeout or document it (if we document, move timeout out of this function and declare it in api_installer)
		timeout := parseTimeout(req.Request.URL.Query().Get("timeout"))

		namespace, name, err := scope.Namer.Name(req)
		if err != nil {
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}
		ctx := scope.ContextFunc(req)
		ctx = request.WithNamespace(ctx, namespace)

		body, err := readBody(req.Request)
		if err != nil {
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}

		s, err := negotiation.NegotiateInputSerializer(req.Request, scope.Serializer)
		if err != nil {
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}
		defaultGVK := scope.Kind
		original := r.New()
		trace.Step("About to convert to expected version")
		obj, gvk, err := scope.Serializer.DecoderToVersion(s.Serializer, defaultGVK.GroupVersion()).Decode(body, &defaultGVK, original)
		if err != nil {
			err = transformDecodeError(typer, err, original, gvk, body)
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}
		if gvk.GroupVersion() != defaultGVK.GroupVersion() {
			err = errors.NewBadRequest(fmt.Sprintf("the API version in the data (%s) does not match the expected API version (%s)", gvk.GroupVersion(), defaultGVK.GroupVersion()))
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}
		trace.Step("Conversion done")

		if err := checkName(obj, name, namespace, scope.Namer); err != nil {
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}

		var transformers []rest.TransformFunc
		if admit != nil && admit.Handles(admission.Update) {
			transformers = append(transformers, func(ctx request.Context, newObj, oldObj runtime.Object) (runtime.Object, error) {
				userInfo, _ := request.UserFrom(ctx)
				return newObj, admit.Admit(admission.NewAttributesRecord(newObj, oldObj, scope.Kind, namespace, name, scope.Resource, scope.Subresource, admission.Update, userInfo))
			})
		}

		trace.Step("About to store object in database")
		wasCreated := false
		result, err := finishRequest(timeout, func() (runtime.Object, error) {
			obj, created, err := r.Update(ctx, name, rest.DefaultUpdatedObjectInfo(obj, scope.Copier, transformers...))
			wasCreated = created
			return obj, err
		})
		if err != nil {
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}
		trace.Step("Object stored in database")

		if err := setSelfLink(result, req, scope.Namer); err != nil {
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}
		trace.Step("Self-link added")

		status := http.StatusOK
		if wasCreated {
			status = http.StatusCreated
		}
		responsewriters.WriteObject(status, scope.Kind.GroupVersion(), scope.Serializer, result, w, req.Request)
	}
}
Example #4
0
// PatchResource returns a function that will handle a resource patch
// TODO: Eventually PatchResource should just use GuaranteedUpdate and this routine should be a bit cleaner
func PatchResource(r rest.Patcher, scope RequestScope, admit admission.Interface, converter runtime.ObjectConvertor) restful.RouteFunction {
	return func(req *restful.Request, res *restful.Response) {
		w := res.ResponseWriter

		// TODO: we either want to remove timeout or document it (if we
		// document, move timeout out of this function and declare it in
		// api_installer)
		timeout := parseTimeout(req.Request.URL.Query().Get("timeout"))

		namespace, name, err := scope.Namer.Name(req)
		if err != nil {
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}

		ctx := scope.ContextFunc(req)
		ctx = request.WithNamespace(ctx, namespace)

		versionedObj, err := converter.ConvertToVersion(r.New(), scope.Kind.GroupVersion())
		if err != nil {
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}

		// TODO: handle this in negotiation
		contentType := req.HeaderParameter("Content-Type")
		// Remove "; charset=" if included in header.
		if idx := strings.Index(contentType, ";"); idx > 0 {
			contentType = contentType[:idx]
		}
		patchType := types.PatchType(contentType)

		patchJS, err := readBody(req.Request)
		if err != nil {
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}

		s, ok := runtime.SerializerInfoForMediaType(scope.Serializer.SupportedMediaTypes(), runtime.ContentTypeJSON)
		if !ok {
			scope.err(fmt.Errorf("no serializer defined for JSON"), res.ResponseWriter, req.Request)
			return
		}
		gv := scope.Kind.GroupVersion()
		codec := runtime.NewCodec(
			scope.Serializer.EncoderForVersion(s.Serializer, gv),
			scope.Serializer.DecoderToVersion(s.Serializer, schema.GroupVersion{Group: gv.Group, Version: runtime.APIVersionInternal}),
		)

		updateAdmit := func(updatedObject runtime.Object, currentObject runtime.Object) error {
			if admit != nil && admit.Handles(admission.Update) {
				userInfo, _ := request.UserFrom(ctx)
				return admit.Admit(admission.NewAttributesRecord(updatedObject, currentObject, scope.Kind, namespace, name, scope.Resource, scope.Subresource, admission.Update, userInfo))
			}

			return nil
		}

		result, err := patchResource(ctx, updateAdmit, timeout, versionedObj, r, name, patchType, patchJS, scope.Namer, scope.Copier, scope.Resource, codec)
		if err != nil {
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}

		if err := setSelfLink(result, req, scope.Namer); err != nil {
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}

		responsewriters.WriteObject(http.StatusOK, scope.Kind.GroupVersion(), scope.Serializer, result, w, req.Request)
	}

}
Example #5
0
func createHandler(r rest.NamedCreater, scope RequestScope, typer runtime.ObjectTyper, admit admission.Interface, includeName bool) restful.RouteFunction {
	return func(req *restful.Request, res *restful.Response) {
		// For performance tracking purposes.
		trace := util.NewTrace("Create " + req.Request.URL.Path)
		defer trace.LogIfLong(500 * time.Millisecond)

		w := res.ResponseWriter

		// TODO: we either want to remove timeout or document it (if we document, move timeout out of this function and declare it in api_installer)
		timeout := parseTimeout(req.Request.URL.Query().Get("timeout"))

		var (
			namespace, name string
			err             error
		)
		if includeName {
			namespace, name, err = scope.Namer.Name(req)
		} else {
			namespace, err = scope.Namer.Namespace(req)
		}
		if err != nil {
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}

		ctx := scope.ContextFunc(req)
		ctx = request.WithNamespace(ctx, namespace)

		gv := scope.Kind.GroupVersion()
		s, err := negotiation.NegotiateInputSerializer(req.Request, scope.Serializer)
		if err != nil {
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}
		decoder := scope.Serializer.DecoderToVersion(s.Serializer, schema.GroupVersion{Group: gv.Group, Version: runtime.APIVersionInternal})

		body, err := readBody(req.Request)
		if err != nil {
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}

		defaultGVK := scope.Kind
		original := r.New()
		trace.Step("About to convert to expected version")
		obj, gvk, err := decoder.Decode(body, &defaultGVK, original)
		if err != nil {
			err = transformDecodeError(typer, err, original, gvk, body)
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}
		if gvk.GroupVersion() != gv {
			err = errors.NewBadRequest(fmt.Sprintf("the API version in the data (%s) does not match the expected API version (%v)", gvk.GroupVersion().String(), gv.String()))
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}
		trace.Step("Conversion done")

		if admit != nil && admit.Handles(admission.Create) {
			userInfo, _ := request.UserFrom(ctx)

			err = admit.Admit(admission.NewAttributesRecord(obj, nil, scope.Kind, namespace, name, scope.Resource, scope.Subresource, admission.Create, userInfo))
			if err != nil {
				scope.err(err, res.ResponseWriter, req.Request)
				return
			}
		}

		trace.Step("About to store object in database")
		result, err := finishRequest(timeout, func() (runtime.Object, error) {
			out, err := r.Create(ctx, name, obj)
			if status, ok := out.(*metav1.Status); ok && err == nil && status.Code == 0 {
				status.Code = http.StatusCreated
			}
			return out, err
		})
		if err != nil {
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}
		trace.Step("Object stored in database")

		if err := setSelfLink(result, req, scope.Namer); err != nil {
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}
		trace.Step("Self-link added")

		responsewriters.WriteObject(http.StatusCreated, scope.Kind.GroupVersion(), scope.Serializer, result, w, req.Request)
	}
}
Example #6
0
// ListResource returns a function that handles retrieving a list of resources from a rest.Storage object.
func ListResource(r rest.Lister, rw rest.Watcher, scope RequestScope, forceWatch bool, minRequestTimeout time.Duration) restful.RouteFunction {
	return func(req *restful.Request, res *restful.Response) {
		// For performance tracking purposes.
		trace := util.NewTrace("List " + req.Request.URL.Path)

		w := res.ResponseWriter

		namespace, err := scope.Namer.Namespace(req)
		if err != nil {
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}

		// Watches for single objects are routed to this function.
		// Treat a /name parameter the same as a field selector entry.
		hasName := true
		_, name, err := scope.Namer.Name(req)
		if err != nil {
			hasName = false
		}

		ctx := scope.ContextFunc(req)
		ctx = request.WithNamespace(ctx, namespace)

		opts := api.ListOptions{}
		if err := scope.ParameterCodec.DecodeParameters(req.Request.URL.Query(), scope.Kind.GroupVersion(), &opts); err != nil {
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}

		// transform fields
		// TODO: DecodeParametersInto should do this.
		if opts.FieldSelector != nil {
			fn := func(label, value string) (newLabel, newValue string, err error) {
				return scope.Convertor.ConvertFieldLabel(scope.Kind.GroupVersion().String(), scope.Kind.Kind, label, value)
			}
			if opts.FieldSelector, err = opts.FieldSelector.Transform(fn); err != nil {
				// TODO: allow bad request to set field causes based on query parameters
				err = errors.NewBadRequest(err.Error())
				scope.err(err, res.ResponseWriter, req.Request)
				return
			}
		}

		if hasName {
			// metadata.name is the canonical internal name.
			// SelectionPredicate will notice that this is
			// a request for a single object and optimize the
			// storage query accordingly.
			nameSelector := fields.OneTermEqualSelector("metadata.name", name)
			if opts.FieldSelector != nil && !opts.FieldSelector.Empty() {
				// It doesn't make sense to ask for both a name
				// and a field selector, since just the name is
				// sufficient to narrow down the request to a
				// single object.
				scope.err(errors.NewBadRequest("both a name and a field selector provided; please provide one or the other."), res.ResponseWriter, req.Request)
				return
			}
			opts.FieldSelector = nameSelector
		}

		if (opts.Watch || forceWatch) && rw != nil {
			watcher, err := rw.Watch(ctx, &opts)
			if err != nil {
				scope.err(err, res.ResponseWriter, req.Request)
				return
			}
			// TODO: Currently we explicitly ignore ?timeout= and use only ?timeoutSeconds=.
			timeout := time.Duration(0)
			if opts.TimeoutSeconds != nil {
				timeout = time.Duration(*opts.TimeoutSeconds) * time.Second
			}
			if timeout == 0 && minRequestTimeout > 0 {
				timeout = time.Duration(float64(minRequestTimeout) * (rand.Float64() + 1.0))
			}
			serveWatch(watcher, scope, req, res, timeout)
			return
		}

		// Log only long List requests (ignore Watch).
		defer trace.LogIfLong(500 * time.Millisecond)
		trace.Step("About to List from storage")
		result, err := r.List(ctx, &opts)
		if err != nil {
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}
		trace.Step("Listing from storage done")
		numberOfItems, err := setListSelfLink(result, req, scope.Namer)
		if err != nil {
			scope.err(err, res.ResponseWriter, req.Request)
			return
		}
		trace.Step("Self-linking done")
		// Ensure empty lists return a non-nil items slice
		if numberOfItems == 0 && meta.IsListType(result) {
			if err := meta.SetList(result, []runtime.Object{}); err != nil {
				scope.err(err, res.ResponseWriter, req.Request)
				return
			}
		}
		responsewriters.WriteObject(http.StatusOK, scope.Kind.GroupVersion(), scope.Serializer, result, w, req.Request)
		trace.Step(fmt.Sprintf("Writing http response done (%d items)", numberOfItems))
	}
}
Example #7
0
func (r *responder) Object(statusCode int, obj runtime.Object) {
	responsewriters.WriteObject(statusCode, r.scope.Kind.GroupVersion(), r.scope.Serializer, obj, r.res.ResponseWriter, r.req.Request)
}