# Download file with multiple connections

**URL:** <https://discourse.julialang.org/t/download-file-with-multiple-connections/91110>\
**Category:** Web Stack\
**Created:** [December 1, 2022, 6:18pm UTC](https://discourse.julialang.org/t/download-file-with-multiple-connections/91110 "2022-12-01T18:18:13Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![mkoculak](https://sea2.discourse-cdn.com/julialang/user_avatar/discourse.julialang.org/mkoculak/32/28310_2.png) [@mkoculak](https://discourse.julialang.org/u/mkoculak)\
**Post date:** [December 1, 2022, 6:18pm UTC](https://discourse.julialang.org/t/download-file-with-multiple-connections/91110/1 "2022-12-01T18:18:13Z")

</div>

Hey,  
while testing a downloading script in python, I also wanted to check if Julia behaves similarly, but could not figure out how to do a script that:

- downloads a big file from the internet (\>5GB)
- has a progress meter
- could download the file in chunks (preferably in parallel with multiple connections)
- writes to disk and not to memory (because size)

I have seen there are a couple of ways you could implement file downloading, with code from Base and from external packages, but couldn’t find a total match.

So I settled on a simple handwritten code that does some of the things:

```julia
using HTTP
using ProgressMeter

url = "http://images.cocodataset.org/zips/train2014.zip"
dst = path/to/file

open(dst, "w") do f
    HTTP.open("GET", url) do io
        r = startread(io)
        l = parse(Int, HTTP.header(r, "Content-Length"))
        p = Progress(l, 1)
        dat = 0
        while !eof(io)
            write(f, read(io, 8192))
            dat +=8192
            update!(p,dat)
        end
    end
end

```

And this does the basic download well (mind you, the url is to a 12gb file I was troubleshooting, that fails to be downloaded beyond 4gb with a single connection, hence the multiple route I was looking for).  
Also got something similar with `Downloads.download`, but here I feel I have more control to alter things.

So, does anyone have a suggestion how to hit all the points mentioned? Do I have to do custom threaded loop with requesting data in ranges directly (the server allows for it)? Or maybe I missed some obvious package/function?  
Thanks in advance!