[weewx-user] Re: Including dynamic link in skin

[Pat]

Give this a try. Admittedly, this took a bit of trial and error with some 
help from Google. Worked for me to get yesterday's date without having to 
import anything. 


#echo time.strftime('%Y%m%d', time.localtime( int( time.time() ) - 86400 ) 
) #



On Sunday, September 16, 2018 at 9:17:39 PM UTC-4, Jonathan Zitelman wrote:
>
> From researching cheetah generator it looks like most of the python syntax 
> carries over when outputting complex expressions using #echo.  So I have 
> tried a few python options, primarily variants of datetime or 
> time.localtime() - timedelta(1) but they're not defined.  I am not sure 
> where I can import a module that will not be overwritten in upgrades.  I 
> tried adding the import to /usr/share/weewx/user/extensions.py but it 
> doesn't seem to carry over.  I have seen a few examples using time-86400, 
> but I would have to define time in epoch values somewhere as well.
>
> I've learned more python than when I first installed WeeWX, and I'm trying 
> to bridge the gaps, but I'm just not there.  Cheetah throws another kink 
> in... and the user guide is less thorough than I would have hoped.
>
> Thank you in advance to any more suggestions on how to specify yesterday's 
> date in the link either in skin.conf or index.html.tmpl!
>
> -Jonathan †
>
>
> On Sunday, September 16, 2018 at 2:30:20 PM UTC-5, Jonathan Zitelman wrote:
>>
>> Thanks!  That generated the output I needed.  I also figured out why you 
>> got the 404 (aside from an extra slash)... the day is always 'yesterday'.  
>> I tried to define yesterday with a timedelta, but can't figure out where I 
>> would put that.  I tried searching for a guide on cheetah on how I could 
>> format strftime directly, but haven't been successful.  Any other advice 
>> would be very helpful!
>>
>> -JZ
>>
>>
>> On Sunday, September 16, 2018 at 1:11:09 PM UTC-5, Pat wrote:
>>>
>>> The Cheetah generator can use #echo to print 
>>> <http://cheetahtemplate.sourceforge.net/docs/users_guide_html/users_guide.html#SECTION000810000000000000000>
>>>  the 
>>> date (and other things)... So you can try this in index.html.tmpl:
>>>
>>>
>>> #echo time.strftime('%Y%m%d')#
>>>
>>> So the full line would be:
>>>
>>> <img src="https://twc.tamu.edu/weather_images/rawsfcst/rawsfcst/#echo 
>>> time.strftime('%Y%m%d')#.png">
>>>
>>>
>>> Which gives me this output:
>>>
>>> <img src="
>>> https://twc.tamu.edu/weather_images/rawsfcst/rawsfcst/20180916.png";>
>>>
>>> But that img returns a 404 for me, so I think you're missing something. 
>>> Either way, hopefully this is enough to get you started. 
>>>
>>>
>>> On Sunday, September 16, 2018 at 1:50:18 PM UTC-4, Jonathan Zitelman 
>>> wrote:
>>>>
>>>> I am using the standard skin on WeeWX 3.8.0.  I am trying to include a 
>>>> link to a remote image, but the filename changes each day.  I have 
>>>> attempted adding it directly to index.html.tmpl using PHP (I know, not the 
>>>> correct location):
>>>>
>>>> https://twc.tamu.edu/weather_images/rawsfcst/rawsfcst<?php echo 
>>>> date(Ymd); ?>.png
>>>>
>>>>
>>>> But it does not look like there is a PHP parser.  Next I added it into 
>>>> the Extras section on skin.conf using direct python replacement, but it 
>>>> does not parse correctly and spits out the actual code in the final HTML 
>>>> document:
>>>>
>>>> https://twc.tamu.edu/weather_images/rawsfcst/rawsfcst' + 
>>>> datetime.strftime.today().strftime('%Y%m%d') + '.png
>>>>
>>>>
>>>> Lastly I tried python using string replacement, and this seems to break 
>>>> the skin.conf file:
>>>>
>>>> skin.conf Code:
>>>>
>>>> fire_date = datetime.strftime.today().strftime('%Y%m%d')
>>>> fire_img = "https://twc.tamu.edu/weather_images/rawsfcst/rawsfcst%s.png"; 
>>>> % (fire_date)
>>>>
>>>>
>>>> Error:
>>>>
>>>> reportengine: Failed to read skin configuration file 
>>>> /etc/weewx/skins/Standard/skin.conf for report StandardReport: Parse error 
>>>> in value at line 17.
>>>>
>>>>
>>>> Does anyone have suggestions on what code to use?  Or if I should be 
>>>> adding this in a different file?  The file on the other site is always 
>>>> "rawsfcstYYYYMMDD.png" and I just need to parse out the date in the report.
>>>>
>>>> -Jonathan †
>>>>
>>>>

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