Get Mbps from wget -o logged output-CodePudding

I'm using wget inside Python to test internet speed. My goal is to track the latency throughout the download, so I need to know the Mbps at least every second during the download.

If I manually run script and then wget I get the desired output ...

--2022-06-20 04:14:13--  https://speed.hetzner.de/100MB.bin
Resolving speed.hetzner.de (speed.hetzner.de)... 88.198.248.254
Connecting to speed.hetzner.de (speed.hetzner.de)|88.198.248.254|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 104857600 (100M) [application/octet-stream]
Saving to: ‘100MB.bin.9’

100MB.bin.9                         0%[                                                              ]       0  --.-KB/s               
100MB.bin.9                         0%[                                                              ] 119.69K   516KB/s               
100MB.bin.9                         0%[                                                              ] 231.69K   488KB/s               
100MB.bin.9                         0%[                                                              ] 343.69K   494KB/s               
100MB.bin.9                         0%[                                                              ] 423.69K   447KB/s               
100MB.bin.9                         0%[                                                              ] 519.69K   431KB/s

But if I run wget <address> -o wget.log I get the follwowing...

Resolving speed.hetzner.de (speed.hetzner.de)... 88.198.248.254
Connecting to speed.hetzner.de (speed.hetzner.de)|88.198.248.254|:443... connected.
HTTP request sent, awaiting response... 200 OK
Length: 104857600 (100M) [application/octet-stream]
Saving to: ‘100MB.bin.7’

     0K .......... .......... .......... .......... ..........  0% 1.22M 82s
    50K .......... .......... .......... .......... ..........  0% 1.68M 71s
   100K .......... .......... .......... .......... ..........  0% 1.70M 67s
   150K .......... .......... .......... .......... ..........  0% 8.41M 53s
   200K .......... .......... .......... .......... ..........  0% 3.89M 47s
(snip)
102250K .......... .......... .......... .......... .......... 99% 3.45M 0s
102300K .......... .......... .......... .......... .......... 99% 2.86M 0s
102350K .......... .......... .......... .......... ..........100% 3.22M 0s
102400K                                                       100% 0.00 =30s

2022-06-20 03:44:11 (3.37 MB/s) - ‘100MB.bin.7’ saved [104857600/104857600]

What exactly does each column mean? For example in the lines...

50K .......... .......... .......... .......... ..........  0% 1.68M 71s
100K .......... .......... .......... .......... ..........  0% 1.70M 67s

Does the 1.68M mean that the first 50 Kilo(bytes?) of data was downloaded at 1.68Mega(bits?) per second, and the 1.70M means the next 50K was at 1.70Mbps?

CodePudding user response：

GNU wget has 2 distinct ways of representing progress: thermometer and dot, 1st is used when output is TTY (as is your first example), writing to file is non-TTY, so you need to instruct GNU wget to use thermometer implicitly if you want first style written to file, that is

wget --progress=bar:force <address> -o wget.log

for more detailed description see --progress in wget man page