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xds/bootstrap: add plugin system for credentials specified in bootstr…
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/* | ||
* | ||
* Copyright 2022 gRPC authors. | ||
* | ||
* Licensed under the Apache License, Version 2.0 (the "License"); | ||
* you may not use this file except in compliance with the License. | ||
* You may obtain a copy of the License at | ||
* | ||
* http://www.apache.org/licenses/LICENSE-2.0 | ||
* | ||
* Unless required by applicable law or agreed to in writing, software | ||
* distributed under the License is distributed on an "AS IS" BASIS, | ||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
* See the License for the specific language governing permissions and | ||
* limitations under the License. | ||
* | ||
*/ | ||
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// Package bootstrap provides the functionality to register possible options | ||
// for aspects of the xDS client through the bootstrap file. | ||
// | ||
// Experimental | ||
// | ||
// Notice: This package is EXPERIMENTAL and may be changed or removed | ||
// in a later release. | ||
package bootstrap | ||
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import ( | ||
"encoding/json" | ||
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"google.golang.org/grpc/credentials" | ||
) | ||
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// registry is a map from credential type name to Credential builder. | ||
var registry = make(map[string]Credentials) | ||
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// Credentials interface encapsulates a credentials.Bundle builder | ||
// that can be used for communicating with the xDS Management server. | ||
type Credentials interface { | ||
// Build returns a credential bundle associated with this credential. | ||
Build(config json.RawMessage) (credentials.Bundle, error) | ||
// Name returns the credential name associated with this credential. | ||
Name() string | ||
} | ||
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// RegisterCredentials registers Credentials used for connecting to the xds | ||
// management server. | ||
// | ||
// NOTE: this function must only be called during initialization time (i.e. in | ||
// an init() function), and is not thread-safe. If multiple credentials are | ||
// registered with the same name, the one registered last will take effect. | ||
func RegisterCredentials(c Credentials) { | ||
registry[c.Name()] = c | ||
} | ||
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// GetCredentials returns the credentials associated with a given name. | ||
// If no credentials are registered with the name, nil will be returned. | ||
func GetCredentials(name string) Credentials { | ||
if c, ok := registry[name]; ok { | ||
return c | ||
} | ||
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return nil | ||
} |
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/* | ||
* | ||
* Copyright 2022 gRPC authors. | ||
* | ||
* Licensed under the Apache License, Version 2.0 (the "License"); | ||
* you may not use this file except in compliance with the License. | ||
* You may obtain a copy of the License at | ||
* | ||
* http://www.apache.org/licenses/LICENSE-2.0 | ||
* | ||
* Unless required by applicable law or agreed to in writing, software | ||
* distributed under the License is distributed on an "AS IS" BASIS, | ||
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
* See the License for the specific language governing permissions and | ||
* limitations under the License. | ||
* | ||
*/ | ||
package bootstrap | ||
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import ( | ||
"encoding/json" | ||
"testing" | ||
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"google.golang.org/grpc/credentials" | ||
) | ||
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const testCredsBuilderName = "test_creds" | ||
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var builder = &testCredsBuilder{} | ||
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func init() { | ||
RegisterCredentials(builder) | ||
} | ||
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type testCredsBuilder struct { | ||
config json.RawMessage | ||
} | ||
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func (t *testCredsBuilder) Build(config json.RawMessage) (credentials.Bundle, error) { | ||
t.config = config | ||
return nil, nil | ||
} | ||
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func (t *testCredsBuilder) Name() string { | ||
return testCredsBuilderName | ||
} | ||
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func TestRegisterNew(t *testing.T) { | ||
c := GetCredentials(testCredsBuilderName) | ||
if c == nil { | ||
t.Fatalf("GetCredentials(%q) credential = nil", testCredsBuilderName) | ||
} | ||
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const sampleConfig = "sample_config" | ||
rawMessage := json.RawMessage(sampleConfig) | ||
if _, err := c.Build(rawMessage); err != nil { | ||
t.Errorf("Build(%v) error = %v, want nil", rawMessage, err) | ||
} | ||
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if got, want := string(builder.config), sampleConfig; got != want { | ||
t.Errorf("Build config = %v, want %v", got, want) | ||
} | ||
} |
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