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?
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