Merge pull request #117 from sheetaljoshi/master

Added support for unsigned_payload. New services such as Lattice does…

cmd/aws-sigv4-proxy/main.go

@@ -47,6 +47,8 @@ var (
 	regionOverride         = kingpin.Flag("region", "AWS region to sign for").String()
 	disableSSLVerification = kingpin.Flag("no-verify-ssl", "Disable peer SSL certificate validation").Bool()
 	idleConnTimeout        = kingpin.Flag("transport.idle-conn-timeout", "Idle timeout to the upstream service").Default("40s").Duration()
+	unsignedPayload        = kingpin.Flag("unsigned-payload", "Prevent signing of the payload").Default("false").Bool()
+
 )
 
 type awsLoggerAdapter struct {
@@ -102,12 +104,13 @@ func main() {
 	} else {
 		credentials = session.Config.Credentials
 	}
-
+	
 	signer := v4.NewSigner(credentials, func(s *v4.Signer) {
 		if shouldLogSigning() {
 			s.Logger = awsLoggerAdapter{}
 			s.Debug = aws.LogDebugWithSigning
 		}
+		s.UnsignedPayload = *unsignedPayload
 	})
 	client := &http.Client{
 		CheckRedirect: func(req *http.Request, via []*http.Request) error {