fetchup

README

Overview

A lib to fetch the target file from remote. It will auto choose the fastest url to download and decompress the file.

Documentation

Overview

Example (Install_golang_migrate)

os.Setenv("GOBIN", "bin")

err := golang_migrate.Install()
if err != nil {
	panic(err)
}

fmt.Print(shellExec("./bin/migrate -version"))

Output:
4.19.0

Example (Install_golangci_lint)

os.Setenv("GOBIN", "bin")

err := golangci_lint.Install()
if err != nil {
	panic(err)
}

fmt.Print(shellExec("./bin/golangci-lint version --short"))

Output:
2.5.0

Index

• func CacheDir() string
• func StripFirstDir(dir string) error
• type DefaultTransport
  • func (t *DefaultTransport) RoundTrip(req *http.Request) (*http.Response, error)
• type ErrNoURLs
  • func (e *ErrNoURLs) Error() string
• type Event
• type Fetchup
  • func New(us ...string) *Fetchup
  • func (fu *Fetchup) Download(u string) error
  • func (fu *Fetchup) FastestURL() (fastest string)
  • func (fu *Fetchup) Fetch() error
  • func (fu *Fetchup) Request(u string) (*Response, error)
  • func (fu *Fetchup) UnTar(r io.Reader) error
  • func (fu *Fetchup) UnZip(r io.Reader) error
  • func (fu *Fetchup) WithContext(ctx context.Context) *Fetchup
  • func (fu *Fetchup) WithLogger(logger Logger) *Fetchup
  • func (fu *Fetchup) WithSaveTo(to string) *Fetchup
• type Log
  • func MultiLogger(list ...Logger) Log
  • func (l Log) Println(msg ...interface{})
• type Logger
• type Response

Examples

• Package (Install_golang_migrate)
• Package (Install_golangci_lint)

Functions

func CacheDir

func CacheDir() string

func StripFirstDir

func StripFirstDir(dir string) error

StripFirstDir removes the first dir but keep all its children.

Types

type DefaultTransport

type DefaultTransport struct {
	UA string
}

DefaultTransport is the default http transport for fetchup, it auto handles the gzip and user-agent.

func (*DefaultTransport) RoundTrip

func (t *DefaultTransport) RoundTrip(req *http.Request) (*http.Response, error)

type ErrNoURLs

type ErrNoURLs struct {
	URLs []string
}

func (*ErrNoURLs) Error

func (e *ErrNoURLs) Error() string

type Event

type Event string

const (
	EventDownload   Event = "Download:"
	EventProgress   Event = "Progress:"
	EventUnzip      Event = "Unzip:"
	EventDownloaded Event = "Downloaded:"
)

type Fetchup

type Fetchup struct {
	Ctx context.Context

	// SaveTo is the path to save the file.
	SaveTo string

	// URLs is the list of candidates, the fastest one will be used to download the file.
	URLs []string

	Logger Logger

	// SpeedPacketSize is the size of the packet used to calculate the download speed.
	// The size should be much smaller than the whole file size to download.
	SpeedPacketSize int

	MinReportSpan time.Duration

	HttpClient *http.Client
}

func New

func New(us ...string) *Fetchup

func (*Fetchup) Download

func (fu *Fetchup) Download(u string) error

func (*Fetchup) FastestURL

func (fu *Fetchup) FastestURL() (fastest string)

func (*Fetchup) Fetch

func (fu *Fetchup) Fetch() error

func (*Fetchup) Request

func (fu *Fetchup) Request(u string) (*Response, error)

func (*Fetchup) UnTar

func (fu *Fetchup) UnTar(r io.Reader) error

func (*Fetchup) UnZip

func (fu *Fetchup) UnZip(r io.Reader) error

func (*Fetchup) WithContext

func (fu *Fetchup) WithContext(ctx context.Context) *Fetchup

func (*Fetchup) WithLogger

func (fu *Fetchup) WithLogger(logger Logger) *Fetchup

func (*Fetchup) WithSaveTo

func (fu *Fetchup) WithSaveTo(to string) *Fetchup

type Log

type Log func(msg ...interface{})

Log type for Println

func MultiLogger

func MultiLogger(list ...Logger) Log

MultiLogger is similar to https://golang.org/pkg/io/#MultiWriter

func (Log) Println

func (l Log) Println(msg ...interface{})

Println interface

type Logger

type Logger interface {
	// Same as fmt.Printf
	Println(...interface{})
}

Logger interface

var LoggerQuiet Logger = Log(func(_ ...interface{}) {})

LoggerQuiet does nothing

type Response

type Response struct {
	Req            *http.Request
	ResHeader      http.Header
	ProgressedBody io.Reader
	Close          func()
}