helper

Documentation

Index

• func Download(url string, filename string) error
• func GetExtension() string
• type WriteCounter
  • func (wc WriteCounter) PrintProgress()
  • func (wc *WriteCounter) Write(p []byte) (int, error)

Functions

func Download

func Download(url string, filename string) error

download will download a url to a local file. It's efficient because it will write as it downloads and not load the whole file into memory. We pass an io.TeeReader into Copy() to report progress on the download.

func GetExtension

func GetExtension() string

Get the extension used for the compressed oc file

Types

type WriteCounter

type WriteCounter struct {
	Total uint64
}

WriteCounter counts the number of bytes written to it. It implements to the io.Writer interface and we can pass this into io.TeeReader() which will report progress on each write cycle.

func (WriteCounter) PrintProgress

func (wc WriteCounter) PrintProgress()

func (*WriteCounter) Write

func (wc *WriteCounter) Write(p []byte) (int, error)