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perf(aws): aws signer has cache and can be reused #886

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perf(aws): aws signer has cache and can be reused #886

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5 changes: 3 additions & 2 deletions pkg/roundtripper/roundtripper.go
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Original file line number Diff line number Diff line change
Expand Up @@ -40,6 +40,7 @@ type AWSSigningTransport struct {
creds aws.CredentialsProvider
region string
log log.Logger
signer *v4.Signer
}

func NewAWSSigningTransport(transport http.RoundTripper, region string, roleArn string, log log.Logger) (*AWSSigningTransport, error) {
Expand Down Expand Up @@ -67,11 +68,11 @@ func NewAWSSigningTransport(transport http.RoundTripper, region string, roleArn
region: region,
creds: creds,
log: log,
signer: v4.NewSigner(),
}, err
}

func (a *AWSSigningTransport) RoundTrip(req *http.Request) (*http.Response, error) {
signer := v4.NewSigner()
payloadHash, newReader, err := hashPayload(req.Body)
if err != nil {
level.Error(a.log).Log("msg", "failed to hash request body", "err", err)
Expand All @@ -85,7 +86,7 @@ func (a *AWSSigningTransport) RoundTrip(req *http.Request) (*http.Response, erro
return nil, err
}

err = signer.SignHTTP(context.Background(), creds, req, payloadHash, service, a.region, time.Now())
err = a.signer.SignHTTP(context.Background(), creds, req, payloadHash, service, a.region, time.Now())
if err != nil {
level.Error(a.log).Log("msg", "failed to sign request body", "err", err)
return nil, err
Expand Down