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

[Jonathan Zitelman]

Thank you so much, works great!  I've been googling all afternoon and 
trying different scenarios, but couldn't find anything that worked.

Also happened to come across your recent skin and will have to try that out 
soon as well.

Thanks again!

-JZ


On Sunday, September 16, 2018 at 8:46:43 PM UTC-5, Pat wrote:
>
> 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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