[s3] refactor duplicate put-object code paths (#6727)

weed/s3api/s3api_put_object_helper.go

@@ -0,0 +1,30 @@
+package s3api
+
+import (
+	"io"
+	"net/http"
+
+	"github.com/seaweedfs/seaweedfs/weed/s3api/s3err"
+)
+
+func getRequestDataReader(s3a *S3ApiServer, r *http.Request) (io.ReadCloser, s3err.ErrorCode) {
+	var s3ErrCode s3err.ErrorCode
+	dataReader := r.Body
+	rAuthType := getRequestAuthType(r)
+	if s3a.iam.isEnabled() {
+		switch rAuthType {
+		case authTypeStreamingSigned, authTypeStreamingUnsigned:
+			dataReader, s3ErrCode = s3a.iam.newChunkedReader(r)
+		case authTypeSignedV2, authTypePresignedV2:
+			_, s3ErrCode = s3a.iam.isReqAuthenticatedV2(r)
+		case authTypePresigned, authTypeSigned:
+			_, s3ErrCode = s3a.iam.reqSignatureV4Verify(r)
+		}
+	} else {
+		if authTypeStreamingSigned == rAuthType {
+			s3ErrCode = s3err.ErrAuthNotSetup
+		}
+	}
+
+	return dataReader, s3ErrCode
+}