54 lines
997 B
Go
54 lines
997 B
Go
package oauth
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import (
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"errors"
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"sync"
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"golang.org/x/oauth2"
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)
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type refreshTokenSource struct {
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mu sync.Mutex
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token *oauth2.Token
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refresher func(token *oauth2.Token) (*oauth2.Token, error)
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}
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func RefreshTokenSource(token *oauth2.Token, refresher func(token *oauth2.Token) (*oauth2.Token, error)) oauth2.TokenSource {
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if token == nil {
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// allocate an (expired) token or mergeToken will fail
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token = new(oauth2.Token)
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}
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ts := &refreshTokenSource{
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token: token,
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refresher: refresher,
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}
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return ts
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}
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func (ts *refreshTokenSource) Token() (*oauth2.Token, error) {
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ts.mu.Lock()
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defer ts.mu.Unlock()
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if ts.token.Valid() {
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return ts.token, nil
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}
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token, err := ts.refresher(ts.token)
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if err != nil {
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return ts.token, err
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}
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if token.AccessToken == "" {
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return nil, errors.New("token refresh failed to obtain access token")
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}
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if token.RefreshToken == "" {
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token.RefreshToken = ts.token.RefreshToken
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}
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ts.token = token
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return ts.token, nil
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}
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