filer: avoid encryption and compression at the same time

fix https://github.com/chrislusf/seaweedfs/issues/1828

weed/operation/upload_content.go

@@ -130,7 +130,8 @@ func doUploadData(uploadUrl string, filename string, cipher bool, data []byte, i
 	// gzip if possible
 	// this could be double copying
 	clearDataLen = len(data)
-	if shouldGzipNow {
+	clearData := data
+	if shouldGzipNow && !cipher {
 		compressed, compressErr := util.GzipData(data)
 		// fmt.Printf("data is compressed from %d ==> %d\n", len(data), len(compressed))
 		if compressErr == nil {
@@ -139,7 +140,7 @@ func doUploadData(uploadUrl string, filename string, cipher bool, data []byte, i
 		}
 	} else if isInputCompressed {
 		// just to get the clear data length
-		clearData, err := util.DecompressData(data)
+		clearData, err = util.DecompressData(data)
 		if err == nil {
 			clearDataLen = len(clearData)
 		}
@@ -150,7 +151,7 @@ func doUploadData(uploadUrl string, filename string, cipher bool, data []byte, i
 
 		// encrypt
 		cipherKey := util.GenCipherKey()
-		encryptedData, encryptionErr := util.Encrypt(data, cipherKey)
+		encryptedData, encryptionErr := util.Encrypt(clearData, cipherKey)
 		if encryptionErr != nil {
 			err = fmt.Errorf("encrypt input: %v", encryptionErr)
 			return
@@ -161,26 +162,26 @@ func doUploadData(uploadUrl string, filename string, cipher bool, data []byte, i
 			_, err = w.Write(encryptedData)
 			return
 		}, "", false, len(encryptedData), "", nil, jwt)
-		if uploadResult != nil {
-			uploadResult.Name = filename
-			uploadResult.Mime = mtype
-			uploadResult.CipherKey = cipherKey
+		if uploadResult == nil {
+			return
 		}
+		uploadResult.Name = filename
+		uploadResult.Mime = mtype
+		uploadResult.CipherKey = cipherKey
+		uploadResult.Size = uint32(clearDataLen)
 	} else {
 		// upload data
 		uploadResult, err = upload_content(uploadUrl, func(w io.Writer) (err error) {
 			_, err = w.Write(data)
 			return
 		}, filename, contentIsGzipped, len(data), mtype, pairMap, jwt)
-	}
-
-	if uploadResult == nil {
-		return
-	}
-
-	uploadResult.Size = uint32(clearDataLen)
-	if contentIsGzipped {
-		uploadResult.Gzip = 1
+		if uploadResult == nil {
+			return
+		}
+		uploadResult.Size = uint32(clearDataLen)
+		if contentIsGzipped {
+			uploadResult.Gzip = 1
+		}
 	}
 
 	return uploadResult, err