mirror of
https://github.com/ceph/ceph-csi.git
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114 lines
3.7 KiB
Go
114 lines
3.7 KiB
Go
/*
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Copyright 2019 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 runtime
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import (
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"fmt"
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"k8s.io/apimachinery/pkg/runtime/schema"
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)
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// NegotiateError is returned when a ClientNegotiator is unable to locate
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// a serializer for the requested operation.
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type NegotiateError struct {
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ContentType string
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Stream bool
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}
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func (e NegotiateError) Error() string {
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if e.Stream {
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return fmt.Sprintf("no stream serializers registered for %s", e.ContentType)
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}
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return fmt.Sprintf("no serializers registered for %s", e.ContentType)
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}
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type clientNegotiator struct {
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serializer NegotiatedSerializer
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encode, decode GroupVersioner
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}
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func (n *clientNegotiator) Encoder(contentType string, params map[string]string) (Encoder, error) {
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// TODO: `pretty=1` is handled in NegotiateOutputMediaType, consider moving it to this method
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// if client negotiators truly need to use it
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mediaTypes := n.serializer.SupportedMediaTypes()
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info, ok := SerializerInfoForMediaType(mediaTypes, contentType)
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if !ok {
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if len(contentType) != 0 || len(mediaTypes) == 0 {
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return nil, NegotiateError{ContentType: contentType}
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}
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info = mediaTypes[0]
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}
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return n.serializer.EncoderForVersion(info.Serializer, n.encode), nil
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}
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func (n *clientNegotiator) Decoder(contentType string, params map[string]string) (Decoder, error) {
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mediaTypes := n.serializer.SupportedMediaTypes()
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info, ok := SerializerInfoForMediaType(mediaTypes, contentType)
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if !ok {
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if len(contentType) != 0 || len(mediaTypes) == 0 {
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return nil, NegotiateError{ContentType: contentType}
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}
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info = mediaTypes[0]
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}
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return n.serializer.DecoderToVersion(info.Serializer, n.decode), nil
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}
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func (n *clientNegotiator) StreamDecoder(contentType string, params map[string]string) (Decoder, Serializer, Framer, error) {
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mediaTypes := n.serializer.SupportedMediaTypes()
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info, ok := SerializerInfoForMediaType(mediaTypes, contentType)
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if !ok {
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if len(contentType) != 0 || len(mediaTypes) == 0 {
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return nil, nil, nil, NegotiateError{ContentType: contentType, Stream: true}
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}
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info = mediaTypes[0]
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}
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if info.StreamSerializer == nil {
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return nil, nil, nil, NegotiateError{ContentType: info.MediaType, Stream: true}
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}
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return n.serializer.DecoderToVersion(info.Serializer, n.decode), info.StreamSerializer.Serializer, info.StreamSerializer.Framer, nil
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}
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// NewClientNegotiator will attempt to retrieve the appropriate encoder, decoder, or
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// stream decoder for a given content type. Does not perform any conversion, but will
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// encode the object to the desired group, version, and kind. Use when creating a client.
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func NewClientNegotiator(serializer NegotiatedSerializer, gv schema.GroupVersion) ClientNegotiator {
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return &clientNegotiator{
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serializer: serializer,
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encode: gv,
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}
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}
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type simpleNegotiatedSerializer struct {
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info SerializerInfo
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}
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func NewSimpleNegotiatedSerializer(info SerializerInfo) NegotiatedSerializer {
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return &simpleNegotiatedSerializer{info: info}
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}
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func (n *simpleNegotiatedSerializer) SupportedMediaTypes() []SerializerInfo {
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return []SerializerInfo{n.info}
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}
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func (n *simpleNegotiatedSerializer) EncoderForVersion(e Encoder, _ GroupVersioner) Encoder {
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return e
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}
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func (n *simpleNegotiatedSerializer) DecoderToVersion(d Decoder, _gv GroupVersioner) Decoder {
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return d
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}
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