streamquote 
This package provides a streaming version of strconv.Quote.
It allows you to quote the data in an io.Reader and write it out to
an io.Writer without having to store the entire input
and the entire output in memory.
Its primary use case is go.rice and similar tools, which need to convert lots of files, some of them quite large, to go strings.
converter := streamquote.New()
converter.Convert(inputfile, outfile)Unlike strconv.Quote, it does not add quotes around the output.