Track the progress of downloading file

Getting Help
1

How to track percentage or bytes download when downloading a file from URL.

2

Do you have any code you use to make this HTTP GET?

3

This will detect the os and downloads the code and the unzip it.
But it will not show the progress of downloading.

func DownloadFile(filepath string, url string) error {
    out, err := os.Create(filepath)
    if err != nil {
        return err
    }
    defer out.Close()
    resp, err := http.Get(url)
    if err != nil {
        return err
    }
    defer resp.Body.Close()
    _, err = io.Copy(out, resp.Body)
    if err != nil {
        return err
    }
    return nil
}
4

Why dump all this code when the only interesting line is this?

resp, err := http.Get(url)

This function is blocking. It returns as soon as it has finished executing the HTTP GET request.

Maybe this blog post can help you:

5

Here they were using third party package. Is there any way to do with go package itself.

Thanks.

6

“github.com/dustin/go-humanize” is just a package to write bytes as kB, MB, GB etc. You don’t need what

7

If it uses other pakages then I have to mention the users who download my pakage that they must have that yo must have http://github.com/dustin/go-humanize this package

8

What Johan means is that you may change this line to avoid using that package:

// We use the humanize package to print the bytes in a meaningful way (e.g. 10 MB)
fmt.Printf("\rDownloading... %s complete", humanize.Bytes(wc.Total))

You may just dump the raw amount of bytes, or write your own formatting function to replace the 3rd party call, e.g.:

//Just print the bytes.
fmt.Printf("\rDownloading... %d complete", wc.Total)
//Or use your custom function.
fmt.Printf("\rDownloading... %s complete", yourFormatterFunction(wc.Total))

There, now you have no dependencies apart from the stdlib.

1 Like
9

Ok.
Thanks

10

And a really small replacement for humanize is this function:

1 Like
11

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