// getIoProgressReader returns a reader that wraps the HTTP response
// body, so it prints a pretty progress bar when reading data from it.
func getIoProgressReader(label string, res *http.Response) io.Reader {
prefix := "Downloading " + label
fmtBytesSize := 18
barSize := int64(80 - len(prefix) - fmtBytesSize)
bar := ioprogress.DrawTextFormatBarForW(barSize, os.Stderr)
fmtfunc := func(progress, total int64) string {
// Content-Length is set to -1 when unknown.
if total == -1 {
return fmt.Sprintf(
"%s: %v of an unknown total size",
prefix,
ioprogress.ByteUnitStr(progress),
)
}
return fmt.Sprintf(
"%s: %s %s",
prefix,
bar(progress, total),
ioprogress.DrawTextFormatBytes(progress, total),
)
}
return &ioprogress.Reader{
Reader: res.Body,
Size: res.ContentLength,
DrawFunc: ioprogress.DrawTerminalf(os.Stderr, fmtfunc),
DrawInterval: time.Second,
}
}
func ProgressBarReader(r io.Reader, size int64) io.Reader {
if size > 0 && size < 5120 { // TODO: isatty
// Don't bother with progress bar below 50k
return r
}
bar := ioprogress.DrawTextFormatBar(int64(56))
fmtfunc := func(progress, total int64) string {
// Content-Length is set to -1 when unknown.
if total == -1 {
return fmt.Sprintf(
"Progress: %v/?",
ioprogress.ByteUnitStr(progress),
)
}
return fmt.Sprintf(
"Progress: %s %s",
bar(progress, total),
ioprogress.DrawTextFormatBytes(progress, total),
)
}
return &ioprogress.Reader{
Reader: r,
Size: size,
DrawFunc: ioprogress.DrawTerminalf(os.Stderr, fmtfunc),
DrawInterval: time.Second,
}
}
func genProgressBar(file *os.File, label string) (io.Reader, error) {
finfo, err := file.Stat()
if err != nil {
return nil, err
}
var prefix string
if label != "" {
prefix = "Uploading " + label
} else {
prefix = "Uploading"
}
fmtBytesSize := 18
barSize := int64(80 - len(prefix) - fmtBytesSize)
bar := ioprogress.DrawTextFormatBarForW(barSize, os.Stderr)
fmtfunc := func(progress, total int64) string {
// Content-Length is set to -1 when unknown.
if total == -1 {
return fmt.Sprintf(
"%s: %v of an unknown total size",
prefix,
ioprogress.ByteUnitStr(progress),
)
}
return fmt.Sprintf(
"%s: %s %s",
prefix,
bar(progress, total),
ioprogress.DrawTextFormatBytes(progress, total),
)
}
return &ioprogress.Reader{
Reader: file,
Size: finfo.Size(),
DrawFunc: ioprogress.DrawTerminalf(os.Stderr, fmtfunc),
DrawInterval: time.Second,
}, nil
}
func newIoprogress(label string, size int64, rdr io.Reader) io.Reader {
prefix := "Downloading " + label
fmtBytesSize := 18
// if barSize < 2, drawing the bar will panic; 3 will at least give a spinny
// thing.
barSize := int64(80 - len(prefix) - fmtBytesSize)
if barSize < 2 {
barSize = 2
}
bar := ioprogress.DrawTextFormatBarForW(barSize, os.Stderr)
fmtfunc := func(progress, total int64) string {
// Content-Length is set to -1 when unknown.
if total == -1 {
return fmt.Sprintf(
"%s: %v of an unknown total size",
prefix,
ioprogress.ByteUnitStr(progress),
)
}
return fmt.Sprintf(
"%s: %s %s",
prefix,
bar(progress, total),
ioprogress.DrawTextFormatBytes(progress, total),
)
}
return &ioprogress.Reader{
Reader: rdr,
Size: size,
DrawFunc: ioprogress.DrawTerminalf(os.Stderr, fmtfunc),
DrawInterval: time.Second,
}
}