// ClientConfigForVersion returns the correct config for a server
func (c *ClientCache) ClientConfigForVersion(version string) (*client.Config, error) {
if c.defaultConfig == nil {
config, err := c.loader.ClientConfig()
if err != nil {
return nil, err
}
c.defaultConfig = config
if c.matchVersion {
if err := client.MatchesServerVersion(c.defaultClient, config); err != nil {
return nil, err
}
}
}
if config, ok := c.configs[version]; ok {
return config, nil
}
// TODO: have a better config copy method
config := *c.defaultConfig
negotiatedVersion, err := client.NegotiateVersion(c.defaultClient, &config, version, registered.RegisteredVersions)
if err != nil {
return nil, err
}
config.Version = negotiatedVersion
client.SetKubernetesDefaults(&config)
c.configs[version] = &config
return &config, nil
}
func TestNegotiateVersion(t *testing.T) {
tests := []struct {
name, version, expectedVersion string
serverVersions []string
clientVersions []string
config *unversioned.Config
expectErr bool
}{
{
name: "server supports client default",
version: "version1",
config: &unversioned.Config{},
serverVersions: []string{"version1", testapi.Default.Version()},
clientVersions: []string{"version1", testapi.Default.Version()},
expectedVersion: "version1",
expectErr: false,
},
{
name: "server falls back to client supported",
version: testapi.Default.Version(),
config: &unversioned.Config{},
serverVersions: []string{"version1"},
clientVersions: []string{"version1", testapi.Default.Version()},
expectedVersion: "version1",
expectErr: false,
},
{
name: "explicit version supported",
version: "",
config: &unversioned.Config{Version: testapi.Default.Version()},
serverVersions: []string{"version1", testapi.Default.Version()},
clientVersions: []string{"version1", testapi.Default.Version()},
expectedVersion: testapi.Default.Version(),
expectErr: false,
},
{
name: "explicit version not supported",
version: "",
config: &unversioned.Config{Version: testapi.Default.Version()},
serverVersions: []string{"version1"},
clientVersions: []string{"version1", testapi.Default.Version()},
expectedVersion: "",
expectErr: true,
},
}
codec := testapi.Default.Codec()
for _, test := range tests {
fakeClient := &fake.RESTClient{
Codec: codec,
Resp: &http.Response{
StatusCode: 200,
Body: objBody(&unversioned_api.APIVersions{Versions: test.serverVersions}),
},
Client: fake.HTTPClientFunc(func(req *http.Request) (*http.Response, error) {
return &http.Response{StatusCode: 200, Body: objBody(&unversioned_api.APIVersions{Versions: test.serverVersions})}, nil
}),
}
c := unversioned.NewOrDie(test.config)
c.Client = fakeClient.Client
response, err := unversioned.NegotiateVersion(c, test.config, test.version, test.clientVersions)
if err == nil && test.expectErr {
t.Errorf("expected error, got nil for [%s].", test.name)
}
if err != nil && !test.expectErr {
t.Errorf("unexpected error for [%s]: %v.", test.name, err)
}
if response != test.expectedVersion {
t.Errorf("expected version %s, got %s.", test.expectedVersion, response)
}
}
}
func TestNegotiateVersion(t *testing.T) {
refusedErr := fmt.Errorf("connection refused")
tests := []struct {
name, version, expectedVersion string
serverVersions []string
clientVersions []string
config *unversioned.Config
expectErr func(err error) bool
sendErr error
}{
{
name: "server supports client default",
version: "version1",
config: &unversioned.Config{},
serverVersions: []string{"version1", testapi.Default.Version()},
clientVersions: []string{"version1", testapi.Default.Version()},
expectedVersion: "version1",
},
{
name: "server falls back to client supported",
version: testapi.Default.Version(),
config: &unversioned.Config{},
serverVersions: []string{"version1"},
clientVersions: []string{"version1", testapi.Default.Version()},
expectedVersion: "version1",
},
{
name: "explicit version supported",
version: "",
config: &unversioned.Config{Version: testapi.Default.Version()},
serverVersions: []string{"version1", testapi.Default.Version()},
clientVersions: []string{"version1", testapi.Default.Version()},
expectedVersion: testapi.Default.Version(),
},
{
name: "explicit version not supported",
version: "",
config: &unversioned.Config{Version: testapi.Default.Version()},
serverVersions: []string{"version1"},
clientVersions: []string{"version1", testapi.Default.Version()},
expectErr: func(err error) bool { return strings.Contains(err.Error(), `server does not support API version "v1"`) },
},
{
name: "connection refused error",
config: &unversioned.Config{Version: testapi.Default.Version()},
serverVersions: []string{"version1"},
clientVersions: []string{"version1", testapi.Default.Version()},
sendErr: refusedErr,
expectErr: func(err error) bool { return err == refusedErr },
},
}
codec := testapi.Default.Codec()
for _, test := range tests {
fakeClient := &fake.RESTClient{
Codec: codec,
Resp: &http.Response{
StatusCode: 200,
Body: objBody(&unversionedapi.APIVersions{Versions: test.serverVersions}),
},
Client: fake.HTTPClientFunc(func(req *http.Request) (*http.Response, error) {
if test.sendErr != nil {
return nil, test.sendErr
}
return &http.Response{StatusCode: 200, Body: objBody(&unversionedapi.APIVersions{Versions: test.serverVersions})}, nil
}),
}
c := unversioned.NewOrDie(test.config)
c.Client = fakeClient.Client
response, err := unversioned.NegotiateVersion(c, test.config, test.version, test.clientVersions)
if err == nil && test.expectErr != nil {
t.Errorf("expected error, got nil for [%s].", test.name)
}
if err != nil {
if test.expectErr == nil || !test.expectErr(err) {
t.Errorf("unexpected error for [%s]: %v.", test.name, err)
}
continue
}
if response != test.expectedVersion {
t.Errorf("expected version %s, got %s.", test.expectedVersion, response)
}
}
}