cloudflare/cloudflared
Publicmirrored fromhttps://github.com/cloudflare/cloudflaredAvailable
cfio/copy.go
27lines · modecode
| 1 | package cfio |
| 2 | |
| 3 | import ( |
| 4 | "io" |
| 5 | "sync" |
| 6 | ) |
| 7 | |
| 8 | const defaultBufferSize = 16 * 1024 |
| 9 | |
| 10 | var bufferPool = sync.Pool{ |
| 11 | New: func() interface{} { |
| 12 | return make([]byte, defaultBufferSize) |
| 13 | }, |
| 14 | } |
| 15 | |
| 16 | func Copy(dst io.Writer, src io.Reader) (written int64, err error) { |
| 17 | _, okWriteTo := src.(io.WriterTo) |
| 18 | _, okReadFrom := dst.(io.ReaderFrom) |
| 19 | var buffer []byte = nil |
| 20 | |
| 21 | if !(okWriteTo || okReadFrom) { |
| 22 | buffer = bufferPool.Get().([]byte) |
| 23 | defer bufferPool.Put(buffer) |
| 24 | } |
| 25 | |
| 26 | return io.CopyBuffer(dst, src, buffer) |
| 27 | } |
| 28 | |