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63 lines
2.3 KiB
Go
63 lines
2.3 KiB
Go
/*
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* MinIO Go Library for Amazon S3 Compatible Cloud Storage
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* Copyright 2017 MinIO, Inc.
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*
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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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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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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 credentials provides credential retrieval and management
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// for S3 compatible object storage.
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//
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// By default the Credentials.Get() will cache the successful result of a
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// Provider's Retrieve() until Provider.IsExpired() returns true. At which
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// point Credentials will call Provider's Retrieve() to get new credential Value.
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//
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// The Provider is responsible for determining when credentials have expired.
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// It is also important to note that Credentials will always call Retrieve the
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// first time Credentials.Get() is called.
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//
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// Example of using the environment variable credentials.
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//
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// creds := NewFromEnv()
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// // Retrieve the credentials value
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// credValue, err := creds.Get()
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// if err != nil {
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// // handle error
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// }
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//
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// Example of forcing credentials to expire and be refreshed on the next Get().
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// This may be helpful to proactively expire credentials and refresh them sooner
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// than they would naturally expire on their own.
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//
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// creds := NewFromIAM("")
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// creds.Expire()
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// credsValue, err := creds.Get()
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// // New credentials will be retrieved instead of from cache.
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//
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//
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// Custom Provider
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//
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// Each Provider built into this package also provides a helper method to generate
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// a Credentials pointer setup with the provider. To use a custom Provider just
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// create a type which satisfies the Provider interface and pass it to the
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// NewCredentials method.
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//
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// type MyProvider struct{}
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// func (m *MyProvider) Retrieve() (Value, error) {...}
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// func (m *MyProvider) IsExpired() bool {...}
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//
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// creds := NewCredentials(&MyProvider{})
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// credValue, err := creds.Get()
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//
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package credentials
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