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Outputting a valid .ics file from an Event for download
Hi,
i wish, my Events could be downloadable as a file for an iCalendar or vCalendar to get the Event-Informations in the own digital calendar.
Is there any plugins or “how to” to make this with a valid .ics file?
I have try http://de-online.co.uk/2006/05/05/textpattern-and-ical, but its not outputting a link from the .ics file – i can only see the content, cant downloadable the event-informations.
What I do wrong or could do others?
Best would be, if the .ics-file-link would be inside the event-article or as button.
Best regards
Lythande
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Re: Outputting a valid .ics file from an Event for download
I’m no expert on this, but I think you need the correct download headers to make the ics file download rather than display.
One way you can do that is to put your code to generate the ics file in a form for using with rah_external_output form (github link as gocom’s homepage seems to be down at the moment) and prefixing that form with:
; Content-Type: text/calendar
; Content-Disposition: attachment; filename=invite.icsSee the instructions with rah_external_output. The Content-Type infos I’ve given are from this page.
If, for example, you name your form rah_eo_generate-ics, you can then call it as a link in your page template as:
<a href="http://example.com/?rah_external_output=generate-ics&event=<txp:article_id />">Download ics</a>You then use adi_gps, rah_gps or similar in your form to grab the article id and plug that into your article_custom tag as a tag in tag, e.g.
<txp:rah_gps name="event" />
<!-- OR: <txp:adi_gps name="event" quiet="1" /> if using adi_gps -->
<txp:article_custom id='<txp:variable name="event" />' section="events">
…
</txp:article_custom>PS: You should also put some checks in place to ensure the ics generator can’t be misused: for example, check that the event attribute you get is a valid integer and end the ics generator if not, restrict your article_custom tag to the section with your events so that other article ids from your site cannot be processed, and prevent it from doing anything if no event is specified.
TXP Builders – finely-crafted code, design and txp
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Re: Outputting a valid .ics file from an Event for download
I think you can do the integer safety check like this:
<txp:rah_gps name="event" />
<!-- OR: <txp:adi_gps name="event" quiet="1" /> if using adi_gps -->
<txp:php>
global $variable;
if( !ctype_digit($variable['event']) ){
$variable['event'] = '';
}
</txp:php>
<txp:if_variable name="event" value=""><txp:else />
<txp:article_custom id='<txp:variable name="event" />' section="events">
…
</txp:article_custom>
</txp:if_variable>That should check if the event string is comprised just of digits (see ctype_digit) and set it to nothing if not. The if_variable-is-empty-else bit then only outputs the code if the variable event is actually a digit.
TXP Builders – finely-crafted code, design and txp
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Re: Outputting a valid .ics file from an Event for download
this would be an excellent howto for txptips. Julian, would you mind very much if you submitted it there?
Yiannis
——————————
NeMe | hblack.art | EMAP | A Sea change | Toolkit of Care
I do my best editing after I click on the submit button.
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Re: Outputting a valid .ics file from an Event for download
In principle, that’s fine, but let’s see how Lythande gets on with it.
TXP Builders – finely-crafted code, design and txp
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Re: Outputting a valid .ics file from an Event for download
Much thanks jakob! :)
I try it now…
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Re: Outputting a valid .ics file from an Event for download
From rah_gps – is there any a .txt-File with the Plugin? On GitHub I dont find it… (only a .php)
I think, I try with ads_gps, because I there find a .txt-plugin.
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Re: Outputting a valid .ics file from an Event for download
adi_gps is just fine but requires the extra attribute. Here’s a compile of jukka’s rah_gps:
# Name: rah_gps v0.1
# Extract HTTP POST/GET values as Textpattern variables
# Author: Jukka Svahn
# URL: http://rahforum.biz
# Recommended load order: 5
# .....................................................................
# This is a plugin for Textpattern - http://textpattern.com/
# To install: textpattern > admin > plugins
# Paste the following text into the "Install plugin" box:
# .....................................................................
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MzI6IjFlYmZhN2E4ZGFiOWJmYThmNzQ4OWNhYzUyMjgyY2QzIjt9And here as files:
TXP Builders – finely-crafted code, design and txp
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Re: Outputting a valid .ics file from an Event for download
colak wrote #307686:
this would be an excellent howto for txptips. Julian, would you mind very much if you submitted it there?
You might wait for txp4.7 before submitting, since it can be done in core now (note to myself: update history).
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Re: Outputting a valid .ics file from an Event for download
at moment I try it out:
inside the form rah_eo_generate-ics (set as “diverse” – was this right?) is now follow:
- Content-Type: text/calendar
- Content-Disposition: attachment; filename=invite.ics
BEGIN:VCALENDAR
VERSION:2.0
X-WR-CALNAME:Führungstermine
PRODID:-//Apple Computer, Inc//iCal 1.5//EN
X-WR-TIMEZONE:Europe/London
<txp:article_custom form=“icsitem” time=“any” section=“naechste-fuehrungen” sortdir=“asc” limit=“10000”/>
END:VCALENDAR
the form icsitem (set as “article”) has follow text:
BEGIN:VEVENT
DTSTART:<txp:custom_field name=“DTSTART” />
DTEND:<txp:custom_field name=“DTEND” />
SUMMARY:<txp:body />
END:VEVENT
I have created two custom-fields with both names. Inside the custom-fields are follow texts in this form of the time-stamps with the true numbers:
YYYYMMDD HH:MM
Now I dont sure understanding for adi_gps-form (where should i do this line?).
Inside a new form get-article-id i have:
<txp:rah_gps name=“event” />
<txp:php> global $variable; if( !ctype_digit($variable[‘event’]) ){ $variable[‘event’] = ‘’; }
</txp:php>
<txp:if_variable name=“event” value=”“><txp:else /> <txp:article_custom id=’<txp:variable name=“event” />’ section=“naechste-fuehrungen”> … </txp:article_custom>
</txp:if_variable>
the form ics-download-link
<a href=”/?rah_external_output=generate-ics&event=<txp:article_id />”>Download ics</a>
should be inside from an article, because is for every event-article. My events is named “naechste-fuehrungen” – the section is named too. I am dont sure, leave “events” in php-lines.
So I have get the form kommende-fuehrungen for my event-article writing follow:
<div class=“artcolumn”>
<h1><txp:title /></h1>
<h2 class=“category”><txp:category1 title=“1” /></h2><txp:if_article_image>
<txp:images form=“image-grid-thumb” wraptag=“section” class=“thumbgrid” break=“figure” />
</txp:if_article_image>
<txp:output_form form=“artikel-body” />
<txp:output_form form=“ics-download-link” />
</div>
and on my site-template is this my forms for the event-articles:
<txp:article_custom section=“naechste-fuehrungen” category=”[true categories names inside…]” limit=“8” form=“kommende-fuehrungen” sort=“expires asc” offset=“0” status=“live” />
The ics-download-link has work – but the ics-event is empty, my calendar couldnt read that.
The ics-download-link outputting the article-id:
http://mydomain.de/?rah_external_output=generate-ics&event=5
Why is the content empty?
Edit the adi_gps to rah_gps-line.
Last edited by lythande (2017-11-08 11:53:43)
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Re: Outputting a valid .ics file from an Event for download
Ah much thanks for the rah_gps-Plugin! I would use this, because the other Plugin is from rah_ too.
So i have changed from adi_gps to rah_gps, inside the one form too.
But the results are same:
Kalender kann diese Kalenderdatei nicht lesen. Es wurden keine Ereignisse zu Ihrem Kalender hinzugefügt.
(translated: Calendar cant read this calendar-file. No events have been added to your calendar.)
Last edited by lythande (2017-11-08 11:43:31)
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Re: Outputting a valid .ics file from an Event for download
I have validated the calendar-link on http://severinghaus.org/projects/icv/
and he found the first error:
Your calendar is using an invalid newline format. Make sure to use \r\n to end lines rather than just \n (RFC 2445 §4.1).
Sorry, your calendar could not be parsed.
Error: Error was: Error at line 8:[DTSTART] Unparseable date: “20180217 15:00”
Cause: Caused by: [DTSTART] Unparseable date: “20180217 15:00”
I understand now, that my timestamp was not correct. I corrected them to “20180217T150000” and End-Date same too.
(would there possible parsing the date “20180217 15:00” to “YYYYMMDDTHHMMSS”, so that I can fill in the custom-field a readable timestamp?)
Now validating again and now he fount follow error:
Your calendar is using an invalid newline format. Make sure to use \r\n to end lines rather than just \n (RFC 2445 §4.1).
Sorry, your calendar could not be parsed.
Error: Error was: Error at line 13:Illegal property [F?HRUNG IN
Cause: Caused by: Illegal property [<DL><DT>F?HRUNG IN <SPAN CLASS]
It seems, I can’t containing the <txp:body /> inside the .ics-file.
Now I thinking about how i can make it better… It would be fine, if inside the ics-file are informations from the event and the url to the event. Maybe it should parsing to another “vCalendar”-readable informations.
The Title is the Date of the Event, inside txp:body are the informations for the event. On my startpage are the events sort of the title-date and show the informations from event (with an image).
So its make not sense to use the title in the vCalendar-Summary.
Edit: I try it with txp:title instead of txp:body and the validator mean now:
Your calendar parsed, but with errors.
Error: Error was: Property [UID] must be specified once
Cause: Sorry, I couldn’t get an exact cause.
I dont know what he mean with Property [UID]?
My iCalendar couldnt get the .ics-file, is still empty….
Last edited by lythande (2017-11-08 13:28:39)
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