Go Package bytes

External

• https://golang.org/pkg/bytes

Internal

• Standard Library

Buffer

• https://golang.org/pkg/bytes/#Buffer

A Buffer is a variable-sized buffer of bytes with Read and Write methods. The zero value for Buffer is an empty buffer ready to use. A Buffer does not have to be initialized and supports both Reader and Writer interface.

Conversion of a Buffer into a []byte:

var buffer bytes.Buffer
bytes := buffer.Bytes()

Why would I use an bytes.Buffer and not a byte slice?

Wrapping a byte[] into a Reader

Wrapping a []byte into a Reader