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https://github.com/edgelesssys/constellation.git
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c743398a23
Generalize retrier: * Generalize Do to use a supplied 'retriable' function * Make clock an optional argument in NewIntervalRetrier * Move grpc/retrier to interal package * Update existing unittests to not use retry feature Add retryDownloadToTempDir: * Wrap downloadToTempDir with retrier. * Retry if TCP connection is reset. * Abort by canceling the context. * Use a mock server in the unit test that serves responses depending on the state received through a state channel. Co-authored-by: katexochen <49727155+katexochen@users.noreply.github.com>
36 lines
881 B
Go
36 lines
881 B
Go
package retry
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import (
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"errors"
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"strings"
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"google.golang.org/grpc/codes"
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"google.golang.org/grpc/status"
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)
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// ServiceIsUnavailable checks if the error is a grpc status with code Unavailable.
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// In the special case of an authentication handshake failure, false is returned to prevent further retries.
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func ServiceIsUnavailable(err error) bool {
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// taken from google.golang.org/grpc/status.FromError
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var targetErr interface {
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GRPCStatus() *status.Status
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Error() string
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}
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if !errors.As(err, &targetErr) {
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return false
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}
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statusErr, ok := status.FromError(targetErr)
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if !ok {
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return false
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}
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if statusErr.Code() != codes.Unavailable {
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return false
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}
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// ideally we would check the error type directly, but grpc only provides a string
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return !strings.HasPrefix(statusErr.Message(), `connection error: desc = "transport: authentication handshake failed`)
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}
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