seekinghttp

package module

v0.0.0-...-148e434 Latest Latest Go to latest Published: Sep 25, 2023 License: BSD-3-Clause Imports: 7 Imported by: 7

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An implementation of io.ReaderAt that works via GET and the Range header.

This was discussed in an article for Gopher Academy in 2017.

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type HttpClient interface {
	Do(req *http.Request) (*http.Response, error)
}

type Logger interface {
	Infof(format string, args ...interface{})
	Debugf(format string, args ...interface{})
}

type SeekingHTTP struct {
	URL    string
	Client HttpClient

	Logger Logger
	// contains filtered or unexported fields
}

SeekingHTTP uses a series of HTTP GETs with Range headers to implement io.ReadSeeker and io.ReaderAt.

func New(url string) *SeekingHTTP

New initializes a SeekingHTTP for the given URL. The SeekingHTTP.Client field may be set before the first call to Read or Seek.

func (s *SeekingHTTP) Read(buf []byte) (int, error)

func (s *SeekingHTTP) ReadAt(buf []byte, off int64) (n int, err error)

ReadAt reads len(buf) bytes into buf starting at offset off.

func (s *SeekingHTTP) Seek(offset int64, whence int) (int64, error)

Seek sets the offset for the next Read.

func (s *SeekingHTTP) SetLogger(logger Logger)

func (s *SeekingHTTP) Size() (int64, error)

Size uses an HTTP HEAD to find out how many bytes are available in total.

Path	Synopsis
cmd
remote-archive-ls