Implement the dot progress bar

Wget 1.x has had the "dot" progress bar for a very long time. This is a fall back mechanism for cases where the output document can't support ansi escape sequences, like very dumb terminals, a text file or even an in memory buffer.

It would be nice if we had such a progress bar implemented as well.

And for Windows, also the Console Taskbar progress in Wget 1.x would be nice. And maybe the Taskbar progress (as Chrome etc. uses). Ref: https://eternallybored.org/misc/wget/src/taskbar-progress.patch.

The latter I've modified somewhat to better work with MSVC: The tbprogress.c and the tbprogress.h.

@darnir I would like to work on it, exploring the codebase now. I believe the implementation will go in bar.c only. will see if I can comeup with something.

can you recommend me how to use a dumb terminal terminal? I've never used something like that before.

Hi @geekodour.

I'm not entirely sure of where the implementation will go. Either bar.c, or it could have its own file.

Well, you don't really need a dumb terminal. Take a look at how --progress=dot works in wget. We want something like that here as well. It's not really very complicated. Should be a fairly straightforward task

In case you're stuck, please feel free to leave a comment here and we'll try to help you out.

added GSoC label

@darnir I am continuing working on this. I left after I faced some issues figuring it out back then. will update soon.

A dynamic multiplier on the left would be nice (K->M->G).

assigned to @DalmeGNU

What do we expect to be the behavior of the dot bar when downloading more than 1 file at the same time?

If it behaves like the "usual" bar (this is, just having more than one dot bar on the screen) then this won't work when output is a text file (which is one of the cases stated above). If we just have a "global" dot bar amounting for all the files we download, the percentages that are showed at the end of every line should be removed, as anything displayed there could be misleading

Can we have both ? More than one dot bar on the console, but just one for a text file ? Currently I can imagine how this would look like in a text file, tbh. Could you create an example output file and share it here ?

This is the output to wget --progress=bar -o file https://ftp.gnu.org/gnu/emacs/emacs-27.2.tar.gz on the file called 'file' (I attached the full file):

     0K .......... .......... .......... .......... ..........  0%  121K 9m1s
    50K .......... .......... .......... .......... ..........  0%  246K 6m43s
   100K .......... .......... .......... .......... ..........  0% 5,20M 4m33s
   150K .......... .......... .......... .......... ..........  0%  124K 5m36s
   200K .......... .......... .......... .......... ..........  0%  116M 4m29s
   250K .......... .......... .......... .......... ..........  0%  248K 4m27s
   300K .......... .......... .......... .......... ..........  0% 6,90M 3m50s
   350K .......... .......... .......... .......... ..........  0% 10,5M 3m22s
   400K .......... .......... .......... .......... ..........  0%  125K 3m57s
   450K .......... .......... .......... .......... ..........  0%  115M 3m34s
   500K .......... .......... .......... .......... ..........  0%  244K 3m38s
   550K .......... .......... .......... .......... ..........  0% 12,3M 3m20s
   600K .......... .......... .......... .......... ..........  0% 11,0M 3m5s

The idea would be to implement a similar dot bar to this one but without the percentage on the right, as it could be misleading (Because when downloading more than one file in parallel, we don't know the full size of the download queue, and so we can't calculate a coherent percentage. Think for example on a recursive download). Of course, we can support multiple dot bars when downloading in the console.

file