在缓冲阅读器中寻找

Question

I need to create a buffered reader of an existing child io.Reader, but that reader must support seeking in data already read and buffered from the child.

So when n bytes were already read, I want to be able to reset the reader to offset 0 and read that chunk again.

Unfortunately bufio.Reader doesn't support seeking.

Is there a standard reader that supports this, or do I have to implement my own?

Answer 1

The purpose of bufio is to provide buffered I/O. Buffered I/O is intended for performance, not time travel.

You can just read your data into a byte slice, then use bytes.Reader to process it further.