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Parse Shell Variable to Text Sensor
Posted: Thursday 29 April 2021 11:40
by michaelb
Hello all,
I want to update a custom text sensor with the expiration date of my free Lets Encrypt certificate on my Synology.
So far I've been able to find and store the date in a Shell Variable using Bash but updating the text sensor is not working (in various use of brackets and parenthises)..
The code I use is the following:
Code: Select all
export expdate=$(openssl x509 -noout -dates -in /usr/syno/etc/certificate/_archive/******/cert.pem | grep 'notAfter=' | sed 's/.........//')
curl -s "http://domoipaddress:8080/json.htm?param=udevice&username=******=&password=******==&type=command&idx=365&nvalue=0&svalue='$expdate'"
The text in the sensor gets updated but only with the text
$expdate instead of its value...
What's going wrong?
Re: Parse Shell Variable to Text Sensor
Posted: Thursday 29 April 2021 12:12
by waaren
michaelb wrote: ↑Thursday 29 April 2021 11:40
What's going wrong?
I tried this with just a text value in expdate and the text sensor then gets updated with the expected value. Can you repeat that test and if that works share the value / format of your expdate date var?'
Re: Parse Shell Variable to Text Sensor
Posted: Thursday 29 April 2021 13:10
by erem
Inside single quotes everything is preserved literally, without exception.
That means you have to close the quotes, insert something, and then re-enter again.
Code: Select all
curl -s "http://domoipaddress:8080/json.htm?param=udevice&username=******=&password=******==&type=command&idx=365&nvalue=0&svalue=" $expdate" "
Re: Parse Shell Variable to Text Sensor
Posted: Thursday 29 April 2021 13:47
by waaren
erem wrote: ↑Thursday 29 April 2021 13:10
Inside single quotes everything is preserved literally, without exception.
Without exception?
Code: Select all
export expdate=test
curl -s "http://127.0.0.1:8080/json.htm?param=udevice&type=command&idx=12&nvalue=0&svalue='$expdate'"
{
"status" : "OK",
"title" : "Update Device"
}
- text sensor.png (8.76 KiB) Viewed 2181 times
Re: Parse Shell Variable to Text Sensor
Posted: Thursday 29 April 2021 15:16
by erem
from here:
https://www.gnu.org/savannah-checkouts/ ... gle-Quotes
Sorry, it seems i was misinformed.
Mea Culpa, Mea Maxima Culpa.
Re: Parse Shell Variable to Text Sensor
Posted: Thursday 29 April 2021 16:28
by waltervl
But bash is not the same as running commands from the command line
@waaren did you run a bash script or ran the commands from a command line?
@michaelb I think you can skip the single quotes in your bash script
Code: Select all
curl -s "http://domoipaddress:8080/json.htm?param=udevice&username=******=&password=******==&type=command&idx=365&nvalue=0&svalue=$expdate"
Re: Parse Shell Variable to Text Sensor
Posted: Thursday 29 April 2021 18:11
by waaren
waltervl wrote: ↑Thursday 29 April 2021 16:28
@waaren did you run a bash script or ran the commands from a command line?
From a bash command line
Code: Select all
ps -p $$
PID TTY TIME CMD
1331003 pts/0 00:00:00 bash
waltervl wrote: ↑Thursday 29 April 2021 16:28
@michaelb I think you can skip the single quotes in your bash script
The reason I asked to share the value / format of your expdate date var is that there might be spaces and other chars in the var that cannot be send 'raw' to domoticz.
Code: Select all
#!/bin/bash
#
rawDate=$(date)
echo $rawDate
#
#This will fail
#
curl -s "http://127.0.0.1:8080/json.htm?param=udevice&type=command&idx=12&nvalue=0&svalue=$rawDate"
echo;echo;echo
# Oneliner to URL encode a string
URL_EncodedDate=$(date | curl --get --silent --output /dev/null --write-out %{url_effective} --data-urlencode @- "" | sed -E 's/..(.*).../\1/'i)
echo $URL_EncodedDate
curl -s "http://127.0.0.1:8080/json.htm?param=udevice&type=command&idx=13&nvalue=0&svalue=$URL_EncodedDate"
result
Code: Select all
./curlTest.sh
Thu 29 Apr 2021 06:06:47 PM CEST
<html><head><title>Bad Request</title></head><body><h1>400 Bad Request</h1></body></html>
Thu%2029%20Apr%202021%2006%3A06%3A47%20PM%20CEST
{
"status" : "OK",
"title" : "Update Device"
}
- text sensor.png (18.16 KiB) Viewed 2150 times