Golang unversioned.NegotiateVersion函數代碼示例

// 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

	// `version` does not necessarily equal `config.Version`.  However, we know that we call this method again with
	// `config.Version`, we should get the the config we've just built.
	config = config
	c.configs[config.Version] = &config

	return &config, nil
}

// 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
}

// 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

	// TODO these fall out when we finish the refactor
	var preferredGV *unversioned.GroupVersion
	if len(version) > 0 {
		gv, err := unversioned.ParseGroupVersion(version)
		if err != nil {
			return nil, err
		}
		preferredGV = &gv
	}
	registeredGVs := []unversioned.GroupVersion{}
	for _, gvString := range registered.RegisteredVersions {
		gv, err := unversioned.ParseGroupVersion(gvString)
		if err != nil {
			return nil, err
		}
		registeredGVs = append(registeredGVs, gv)
	}

	negotiatedVersion, err := client.NegotiateVersion(c.defaultClient, &config, preferredGV, registeredGVs)
	if err != nil {
		return nil, err
	}
	config.GroupVersion = negotiatedVersion
	client.SetKubernetesDefaults(&config)
	c.configs[version] = &config

	// `version` does not necessarily equal `config.Version`.  However, we know that we call this method again with
	// `config.Version`, we should get the the config we've just built.
	configCopy := config
	c.configs[config.GroupVersion.String()] = &configCopy

	return &config, nil
}

// ClientConfigForVersion returns the correct config for a server
func (c *ClientCache) ClientConfigForVersion(version *unversioned.GroupVersion) (*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 version != nil {
		if config, ok := c.configs[*version]; ok {
			return config, nil
		}
	}

	// TODO: have a better config copy method
	config := *c.defaultConfig

	// TODO these fall out when we finish the refactor
	var preferredGV *unversioned.GroupVersion
	if version != nil {
		versionCopy := *version
		preferredGV = &versionCopy
	}

	negotiatedVersion, err := client.NegotiateVersion(c.defaultClient, &config, preferredGV, registered.RegisteredGroupVersions)
	if err != nil {
		return nil, err
	}
	config.GroupVersion = negotiatedVersion
	client.SetKubernetesDefaults(&config)

	if version != nil {
		c.configs[*version] = &config
	}

	// `version` does not necessarily equal `config.Version`.  However, we know that we call this method again with
	// `config.Version`, we should get the the config we've just built.
	configCopy := config
	c.configs[*config.GroupVersion] = &configCopy

	return &config, nil
}

// ClientConfigForVersion returns the correct config for a server
func (c *clientCache) ClientConfigForVersion(version string) (*kclient.Config, error) {
	if c.defaultConfig == nil {
		config, err := c.loader.ClientConfig()
		if err != nil {
			return nil, err
		}
		c.defaultConfig = config
	}
	// TODO: have a better config copy method
	if config, ok := c.configs[version]; ok {
		return config, nil
	}
	if c.negotiatingClient == nil {
		// TODO: We want to reuse the upstream negotiation logic, which is coupled
		// to a concrete kube Client. The negotiation will ultimately try and
		// build an unversioned URL using the config prefix to ask for supported
		// server versions. If we use the default kube client config, the prefix
		// will be /api, while we need to use the OpenShift prefix to ask for the
		// OpenShift server versions. For now, set OpenShift defaults on the
		// config to ensure the right prefix gets used. The client cache and
		// negotiation logic should be refactored upstream to support downstream
		// reuse so that we don't need to do any of this cache or negotiation
		// duplication.
		negotiatingConfig := *c.defaultConfig
		client.SetOpenShiftDefaults(&negotiatingConfig)
		negotiatingClient, err := kclient.New(&negotiatingConfig)
		if err != nil {
			return nil, err
		}
		c.negotiatingClient = negotiatingClient
	}
	config := *c.defaultConfig
	negotiatedVersion, err := kclient.NegotiateVersion(c.negotiatingClient, &config, version, latest.Versions)
	if err != nil {
		return nil, err
	}
	config.Version = negotiatedVersion
	client.SetOpenShiftDefaults(&config)
	c.configs[version] = &config

	// `version` does not necessarily equal `config.Version`.  However, we know that we call this method again with
	// `config.Version`, we should get the the config we've just built.
	configCopy := config
	c.configs[config.Version] = &configCopy

	return &config, nil
}

func TestNegotiateVersion(t *testing.T) {
	tests := []struct {
		name            string
		version         *uapi.GroupVersion
		expectedVersion *uapi.GroupVersion
		serverVersions  []string
		clientVersions  []uapi.GroupVersion
		config          *restclient.Config
		expectErr       func(err error) bool
		sendErr         error
		statusCode      int
	}{
		{
			name:            "server supports client default",
			version:         &uapi.GroupVersion{Version: "version1"},
			config:          &restclient.Config{},
			serverVersions:  []string{"version1", registered.GroupOrDie(api.GroupName).GroupVersion.String()},
			clientVersions:  []uapi.GroupVersion{{Version: "version1"}, registered.GroupOrDie(api.GroupName).GroupVersion},
			expectedVersion: &uapi.GroupVersion{Version: "version1"},
			statusCode:      http.StatusOK,
		},
		{
			name:            "server falls back to client supported",
			version:         &registered.GroupOrDie(api.GroupName).GroupVersion,
			config:          &restclient.Config{},
			serverVersions:  []string{"version1"},
			clientVersions:  []uapi.GroupVersion{{Version: "version1"}, registered.GroupOrDie(api.GroupName).GroupVersion},
			expectedVersion: &uapi.GroupVersion{Version: "version1"},
			statusCode:      http.StatusOK,
		},
		{
			name:            "explicit version supported",
			config:          &restclient.Config{ContentConfig: restclient.ContentConfig{GroupVersion: &registered.GroupOrDie(api.GroupName).GroupVersion}},
			serverVersions:  []string{"/version1", registered.GroupOrDie(api.GroupName).GroupVersion.String()},
			clientVersions:  []uapi.GroupVersion{{Version: "version1"}, registered.GroupOrDie(api.GroupName).GroupVersion},
			expectedVersion: &registered.GroupOrDie(api.GroupName).GroupVersion,
			statusCode:      http.StatusOK,
		},
		{
			name:           "explicit version not supported",
			config:         &restclient.Config{ContentConfig: restclient.ContentConfig{GroupVersion: &registered.GroupOrDie(api.GroupName).GroupVersion}},
			serverVersions: []string{"version1"},
			clientVersions: []uapi.GroupVersion{{Version: "version1"}, registered.GroupOrDie(api.GroupName).GroupVersion},
			expectErr:      func(err error) bool { return strings.Contains(err.Error(), `server does not support API version "v1"`) },
			statusCode:     http.StatusOK,
		},
		{
			name:           "connection refused error",
			config:         &restclient.Config{ContentConfig: restclient.ContentConfig{GroupVersion: &registered.GroupOrDie(api.GroupName).GroupVersion}},
			serverVersions: []string{"version1"},
			clientVersions: []uapi.GroupVersion{{Version: "version1"}, registered.GroupOrDie(api.GroupName).GroupVersion},
			sendErr:        errors.New("connection refused"),
			expectErr:      func(err error) bool { return strings.Contains(err.Error(), "connection refused") },
			statusCode:     http.StatusOK,
		},
		{
			name:            "discovery fails due to 403 Forbidden errors and thus serverVersions is empty, use default GroupVersion",
			config:          &restclient.Config{ContentConfig: restclient.ContentConfig{GroupVersion: &registered.GroupOrDie(api.GroupName).GroupVersion}},
			clientVersions:  []uapi.GroupVersion{{Version: "version1"}, registered.GroupOrDie(api.GroupName).GroupVersion},
			expectedVersion: &registered.GroupOrDie(api.GroupName).GroupVersion,
			statusCode:      http.StatusForbidden,
		},
		{
			name:            "discovery fails due to 404 Not Found errors and thus serverVersions is empty, use requested GroupVersion",
			version:         &uapi.GroupVersion{Version: "version1"},
			config:          &restclient.Config{ContentConfig: restclient.ContentConfig{GroupVersion: &registered.GroupOrDie(api.GroupName).GroupVersion}},
			clientVersions:  []uapi.GroupVersion{{Version: "version1"}, registered.GroupOrDie(api.GroupName).GroupVersion},
			expectedVersion: &uapi.GroupVersion{Version: "version1"},
			statusCode:      http.StatusNotFound,
		},
		{
			name:           "discovery fails due to 403 Forbidden errors and thus serverVersions is empty, no fallback GroupVersion",
			config:         &restclient.Config{},
			clientVersions: []uapi.GroupVersion{{Version: "version1"}, registered.GroupOrDie(api.GroupName).GroupVersion},
			expectErr:      func(err error) bool { return strings.Contains(err.Error(), "failed to negotiate an api version;") },
			statusCode:     http.StatusForbidden,
		},
	}

	for _, test := range tests {
		fakeClient := &fake.RESTClient{
			NegotiatedSerializer: testapi.Default.NegotiatedSerializer(),
			Resp: &http.Response{
				StatusCode: test.statusCode,
				Body:       objBody(&uapi.APIVersions{Versions: test.serverVersions}),
			},
			Client: fake.CreateHTTPClient(func(req *http.Request) (*http.Response, error) {
				if test.sendErr != nil {
					return nil, test.sendErr
				}
				header := http.Header{}
				header.Set("Content-Type", runtime.ContentTypeJSON)
				return &http.Response{StatusCode: test.statusCode, Header: header, Body: objBody(&uapi.APIVersions{Versions: test.serverVersions})}, nil
			}),
		}
		c := unversioned.NewOrDie(test.config)
		c.DiscoveryClient.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)
//.........這裏部分代碼省略.........

func TestNegotiateVersion(t *testing.T) {
	tests := []struct {
		name            string
		version         *uapi.GroupVersion
		expectedVersion *uapi.GroupVersion
		serverVersions  []string
		clientVersions  []uapi.GroupVersion
		config          *unversioned.Config
		expectErr       func(err error) bool
		sendErr         error
	}{
		{
			name:            "server supports client default",
			version:         &uapi.GroupVersion{Version: "version1"},
			config:          &unversioned.Config{},
			serverVersions:  []string{"/version1", testapi.Default.Version()},
			clientVersions:  []uapi.GroupVersion{{Version: "version1"}, {Version: testapi.Default.Version()}},
			expectedVersion: &uapi.GroupVersion{Version: "version1"},
		},
		{
			name:            "server falls back to client supported",
			version:         &uapi.GroupVersion{Version: testapi.Default.Version()},
			config:          &unversioned.Config{},
			serverVersions:  []string{"/version1"},
			clientVersions:  []uapi.GroupVersion{{Version: "version1"}, {Version: testapi.Default.Version()}},
			expectedVersion: &uapi.GroupVersion{Version: "version1"},
		},
		{
			name:            "explicit version supported",
			config:          &unversioned.Config{GroupVersion: testapi.Default.GroupVersion()},
			serverVersions:  []string{"/version1", testapi.Default.Version()},
			clientVersions:  []uapi.GroupVersion{{Version: "version1"}, {Version: testapi.Default.Version()}},
			expectedVersion: &uapi.GroupVersion{Version: testapi.Default.Version()},
		},
		{
			name:           "explicit version not supported",
			config:         &unversioned.Config{GroupVersion: testapi.Default.GroupVersion()},
			serverVersions: []string{"/version1"},
			clientVersions: []uapi.GroupVersion{{Version: "version1"}, {Version: 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{GroupVersion: testapi.Default.GroupVersion()},
			serverVersions: []string{"/version1"},
			clientVersions: []uapi.GroupVersion{{Version: "version1"}, {Version: testapi.Default.Version()}},
			sendErr:        errors.New("connection refused"),
			expectErr:      func(err error) bool { return strings.Contains(err.Error(), "connection refused") },
		},
	}
	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.CreateHTTPClient(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("%s: expected version %s, got %s.", test.name, test.expectedVersion, response)
		}
	}
}

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(&api.APIVersions{Versions: test.serverVersions}),
			},
			Client: fake.HTTPClientFunc(func(req *http.Request) (*http.Response, error) {
				return &http.Response{StatusCode: 200, Body: objBody(&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)
		}
	}
}