[SOLVED] Conky: Maintain Curl Output When Off-line?

jakfish · 09-23-2016, 09:05 AM

On my Chromebook Acer C720, running GalliumOS (Xubuntu 16.04), I run a simple conky for weather temperature:

Code:

$color${execi 300 /home/jake/Scripts_Icons/weather 20902}

This calls a weather script, which is this:

Code:

curl -s http://rss.accuweather.com/rss/liveweather_rss.asp\?metric\=${METRIC}\&locCode\=$1 \
| sed -n '/Currently:/ s/.*: \(.*\): \([0-9]*\)\([CF]\).*/\2°\3 \1/p'

This works, but if I disable wifi, the script obviously can't go on-line to get the weather and conky goes blank.

When off-line, is there a way to maintain the print-out of the last retrieved weather temperature?

Thank you,
Jake

goumba · 09-23-2016, 09:12 AM

Save the data to a file, then pull the weather data from the cache. BTW, please use code tags, makes code easier to read.

Give this a try:

Code:

#!/bin/env bash
wxcache=${HOME}/tmp/wxdata-cached

curl -o ${wxcache} -s http://rss.accuweather.com/rss/liveweather_rss.asp\?metric\=${METRIC}\&locCode\=$1
sed -n '/Currently:/ s/.*: \(.*\): \([0-9]*\)\([CF]\).*/\2°\3 \1/p' ${wxcache}

jakfish · 09-23-2016, 09:46 AM

That absolutely did it

You script guys are amazing. (I edited original post to add code tags)

Many, many thanks,
Jake

goumba · 09-23-2016, 10:03 AM

You know it's possible that the data downloaded may be valid but not contain weather data (URL Moved?). In that case you will lose your conky display, but in that case you'll at least something's seriously wrong.

Now if you want to get fancy... you can just have it cache the old data and not overwrite it unless valid data is found. You can also only cache the weather info and not the whole page as I simply did above (however in doing so you can pull any cached data at any time, not just the temperature and conditions).

jakfish · 09-24-2016, 04:54 PM

Sorry for the late post, I was away. So far, your suggested setup has worked with wifi on or off.

My conky interval is:

Code:

update_interval = 1.0,

But it would be appear by looking at the cached data that the interval for temperature retrieval is far greater, maybe 10+ minutes. That's okay, but I was wondering why. The curl command doesn't appear to have a built-in interval.

Jake

descendant_command · 09-24-2016, 07:48 PM

Quote:

Code:

execi 300

You're calling the script every 300 seconds.

jakfish · 09-24-2016, 10:19 PM

That would explain it

Thanks,
Jake