chore: refactor log limit in rest (#3572)

core/iox/read.go

@@ -28,6 +28,13 @@ func DupReadCloser(reader io.ReadCloser) (io.ReadCloser, io.ReadCloser) {
 	return io.NopCloser(tee), io.NopCloser(&buf)
 }
 
+// KeepSpace customizes the reading functions to keep leading and tailing spaces.
+func KeepSpace() TextReadOption {
+	return func(o *textReadOptions) {
+		o.keepSpace = true
+	}
+}
+
 // LimitDupReadCloser returns two io.ReadCloser that read from the first will be written to the second.
 // But the second io.ReadCloser is limited to up to n bytes.
 // The first returned reader needs to be read first, because the content
@@ -38,13 +45,6 @@ func LimitDupReadCloser(reader io.ReadCloser, n int64) (io.ReadCloser, io.ReadCl
 	return io.NopCloser(tee), io.NopCloser(&buf)
 }
 
-// KeepSpace customizes the reading functions to keep leading and tailing spaces.
-func KeepSpace() TextReadOption {
-	return func(o *textReadOptions) {
-		o.keepSpace = true
-	}
-}
-
 // ReadBytes reads exactly the bytes with the length of len(buf)
 func ReadBytes(reader io.Reader, buf []byte) error {
 	var got int