Need help with redirection in bash. Where to dig?

Question

linux

Good afternoon! The task is simple, and everything should theoretically work, but it does not work out a little.
There is a bash script, it has one variable. It is
necessary to take a txt file from the server and parse this variable using the pipe of commands that are written in this file
. In the console, I do this:

asterisk -rx 'gsm send ussd 1 *112*1#' | cut -d' ' -f2 | tail -n 1 | awk -F ":" '{print $1}'
1156

everything works
now I take

cut -d' ' -f2 | tail -n 1 | awk -F ":" '{print $1}' и помещаю в файл на сервере http://192.168.240.47/ussdkstregexp.txt

and execute:

asterisk -rx 'gsm send ussd 1 *112*1#' | `wget -qO- http://192.168.240.47/ussdkstregexp.txt`

and doesn't work.
what could be the problem?

Answer 1

Yaroslav, when you execute a command
, the wget program (GNU Wget is a free utility for non-interactive download of files from the Web) downloads the specified file from the web server, and, taking into account the -O- switch, outputs its contents to standard output (stdout) .
Therefore, if you want to use the received data, downloaded from a file on the web server, and output to stdout, then simply pipe the output of wget to the following command through the pipeline:

wget -qO- http://192.168.240.47/ussdkstregexp.txt | next_command

Answer 2

IMHO it's a big perversion to make tricky *** one-liners, although theoretically you can make such a one-liner by cheating with streams.
minus one, few people will understand it, and in a month you yourself will be thinking "what did I do"
maybe just asterisk -rx 'gsm send ussd 1 *112*1#' | cut -d' ' -f2 | tail -n 1 | awk -F ":" '{print $1}' put into a file,
then you can download it and redirect it to bash, bash will process the commands from the stream.
it will be much easier to understand the work.