baikal not working with homeassistant caldav calendar component: unauthorized access etc.

[linuxlurak]

The problem

I can't get my calendar running in home assistant... Works perfect in Thunderbird but not in home assistant.

Environment

Home Assistant Version: 0.115.6 Ubuntu Server 20.04 Linux homeautomation 5.4.0-47-generic #51-Ubuntu SMP Fri Sep 4 19:50:52 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux baikal v. 0.7.1

Problem-relevant configs:

This is my config: part of configuration.yaml:

calendar:
  - platform: caldav
    username: !secret caldav_user
    password: !secret caldav_password
    url: http://192.168.10.4:8018/cal.php/calendars/homeassistant/tasks
    calendars: tasks

apache config:

<VirtualHost 0.0.0.0:8018>
        ServerName baikalserver

        ServerAdmin webmaster@localhost
        DocumentRoot /var/www/html/baikal/html

        RewriteEngine on
        RewriteRule /.well-known/carddav /dav.php [R=308,L]
        RewriteRule /.well-known/caldav  /dav.php [R=308,L]

        LogLevel info
        ErrorLog ${APACHE_LOG_DIR}/error.log
        CustomLog ${APACHE_LOG_DIR}/access.log combined

   <Directory "/var/www/baikal/html">
        Options None
        AllowOverride None
        Require all granted
    </Directory>

    <IfModule mod_expires.c>
        ExpiresActive Off
    </IfModule>
</VirtualHost>

baikal config /var/www/html/baikal/config/baikal.yaml:

system:
    configured_version: 0.7.1
    timezone: Europe/Paris
    card_enabled: false
    cal_enabled: true
    dav_auth_type: Basic
    admin_passwordhash: *CUT*
    auth_realm: BaikalDAV
    base_uri: ''
    invite_from: ''
database:
    sqlite_file: /var/www/html/baikal/Specific/db/db.sqlite
    mysql: true
    mysql_host: localhost
    mysql_dbname: baikal
    mysql_username: baikal
    mysql_password: baikal
    encryption_key:  *CUT*
    configured_version: ''

Traceback/Error logs

As stated thunderbird works fine, home assistant tells me:

2020-10-02 19:36:48 ERROR (MainThread) [homeassistant.components.calendar] caldav: Error on device update! Traceback (most recent call last): File "/usr/local/lib/python3.8/dist-packages/homeassistant/helpers/entity_platform.py", line 346, in _async_add_entity await entity.async_device_update(warning=False) File "/usr/local/lib/python3.8/dist-packages/homeassistant/helpers/entity.py", line 471, in async_device_update await self.hass.async_add_executor_job(self.update) # type: ignore File "/usr/lib/python3.8/concurrent/futures/thread.py", line 57, in run result = self.fn(*self.args, **self.kwargs) File "/usr/local/lib/python3.8/dist-packages/homeassistant/components/caldav/calendar.py", line 146, in update self.data.update() File "/usr/local/lib/python3.8/dist-packages/homeassistant/util/init.py", line 239, in wrapper result = method(*args, **kwargs) File "/usr/local/lib/python3.8/dist-packages/homeassistant/components/caldav/calendar.py", line 203, in update results = self.calendar.date_search(start_of_today, start_of_tomorrow) File "/home/homeassistant/.homeassistant/deps/lib/python3.8/site-packages/caldav/objects.py", line 594, in date_search response = self._query(root, 1, 'report') File "/home/homeassistant/.homeassistant/deps/lib/python3.8/site-packages/caldav/objects.py", line 167, in _query raise error.exception_by_methodquery_method caldav.lib.error.ReportError: 500 Internal Server Error

b'\n<d:error xmlns:d="DAV:" xmlns:s="http://sabredav.org/ns">\n <s:sabredav-version>4.1.0</s:sabredav-version>\n <s:exception>Sabre\VObject\ParseException</s:exception>\n <s:message>This parser only supports VCARD and VCALENDAR files</s:message>\n</d:error>\n'

and apache2 error and access log tells me this:

==> /var/log/apache2/access.log <== 192.168.10.4 - - [02/Oct/2020:19:51:32 +0200] "PROPFIND /cal.php/calendars/homeassistant/tasks/ HTTP/1.1" 401 1141 "-" "Mozilla/5.0" 192.168.10.4 - homeassistant [02/Oct/2020:19:51:32 +0200] "PROPFIND /cal.php/calendars/homeassistant/tasks/ HTTP/1.1" 207 1098 "-" "Mozilla/5.0" 192.168.10.4 - homeassistant [02/Oct/2020:19:51:32 +0200] "PROPFIND /cal.php/principals/homeassistant/ HTTP/1.1" 207 1086 "-" "Mozilla/5.0" 192.168.10.4 - homeassistant [02/Oct/2020:19:51:32 +0200] "PROPFIND /cal.php/calendars/homeassistant/ HTTP/1.1" 207 2363 "-" "Mozilla/5.0"

==> /var/log/apache2/error.log <==

[Fri Oct 02 19:51:33.785481 2020] [php7:notice] [pid 331104] [client 192.168.10.4:58680] Sabre\VObject\ParseException: This parser only supports VCARD and VCALENDAR files in /var/www/html/baikal/vendor/sabre/vobject/lib/Parser/MimeDir.php:163\nStack trace:\n#0 /var/www/html/baikal/vendor/sabre/vobject/lib/Parser/MimeDir.php(90): Sabre\VObject\Parser\MimeDir->parseDocument()\n#1 /var/www/html/baikal/vendor/sabre/vobject/lib/Reader.php(47): Sabre\VObject\Parser\MimeDir->parse()\n#2 /var/www/html/baikal/vendor/sabre/dav/lib/CalDAV/Plugin.php(513): Sabre\VObject\Reader::read()\n#3 /var/www/html/baikal/vendor/sabre/dav/lib/CalDAV/Plugin.php(258): Sabre\CalDAV\Plugin->calendarQueryReport()\n#4 /var/www/html/baikal/vendor/sabre/event/lib/WildcardEmitterTrait.php(89): Sabre\CalDAV\Plugin->report()\n#5 /var/www/html/baikal/vendor/sabre/dav/lib/DAV/CorePlugin.php(685): Sabre\DAV\Server->emit()\n#6 /var/www/html/baikal/vendor/sabre/event/lib/WildcardEmitterTrait.php(89): Sabre\DAV\CorePlugin->httpReport()\n#7 /var/www/html/baikal/vendor/sabre/dav/lib/DAV/Server.php(470): Sabre\DAV\Server->emit()\n#8 /var/www/html/baikal/vendor/sabre/dav/lib/DAV/Server.php(251): Sabre\DAV\Server->invokeMethod()\n#9 /var/www/html/baikal/vendor/sabre/dav/lib/DAV/Server.php(319): Sabre\DAV\Server->start()\n#10 /var/www/html/baikal/Core/Frameworks/Baikal/Core/Server.php(119): Sabre\DAV\Server->exec()\n#11 /var/www/html/baikal/html/cal.php(74): Baikal\Core\Server->start()\n#12 {main}

and after this:

==> /var/log/apache2/access.log <== 192.168.10.4 - homeassistant [02/Oct/2020:19:51:33 +0200] "REPORT /cal.php/calendars/homeassistant/tasks/ HTTP/1.1" 500 687 "-" "Mozilla/5.0"

First apache gives me a 401 (unauthorized), and later a internal server error 500... baikal seems to work just fine with thunderbird, but not with home assistant...

Additional information

Community Topic: https://community.home-assistant.io/t/correct-config-for-calendar-component-caldac-baikal-apache2/232055 homeassistant core issue: https://github.com/home-assistant/core/issues/41222

[elliottjohnson]

Using some of the info found here https://github.com/sabre-io/Baikal/issues/695

Adding the debugging statement to the thrown error in MimeDir.php and did indeed get my designated timezone printed out. Apparently the timezone is being sent instead of the string "BEGIN:VCARD" or "BEGIN:VCALENDAR". I assume this is some old broken behavior in setting up the calendar, sending the TZ instead of the BEGIN statement.

[elliottjohnson]

I put a print statement in the python3.8/site-packages/caldav/objects.py just above line 167 and the following XML is triggering this issue:

<?xml version='1.0' encoding='utf-8'?> <C:calendar-query xmlns:D="DAV" xmlns:C="urn:ietf:params:xml:ns:caldav" xmlns:I="http://apple.com/ns/ical/"><ns0:prop xmlns:ns0="DAV:"><C:calendar-data><C:expand start="20210107T080000Z" end="20210114T080000Z"/></C:calendar-data></ns0:prop><C:filter><C:comp-filter name="VCALENDAR"><C:comp-filter name="VEVENT"><C:time-range start="20210107T080000Z" end="20210114T080000Z"/></C:comp-filter></C:comp-filter></C:filter></C:calendar-query>

So it appears that the python caldav request issued by homeassistant are using an iCal namespace and possibly a method that baikal no longer accepts: https://github.com/sabre-io/Baikal/issues/695#issuecomment-309304378 I removed my Baikal calendar and created a new one with a very different TZ than I use and that new TZ appears to be what is requested, not the TZ from homeassistant.

I'll look into it more, since I have to head to my dayjob. Issue 695 above attributes the problem to a bad iCal entry, but this issue might be how homeassistant is using the data it gathers from Baikal to query VEVENTs or it maybe an issue with how caldav/objects.py handles homeassistant's request. Hopefully I'll have time to look at this more later tonight.

[elliottjohnson]

@linuxlurak see my "fix" at the end of https://github.com/sabre-io/dav/issues/1318

[tobixen]

This is possibly something that should be fixed in the python caldav library?

[rarroyo6]

The problem still exists in HA 2024.3.2.

[tobixen]

So it appears that the python caldav request issued by homeassistant are using an iCal namespace

Oh. I've been wondering a bit about that. The link to Apple has been broken probably for a decade, and the namespace seems not to be documented anywhere - but quite some calendars supports the calendar-color and calendar-order attributes that apparently belongs to this namespace.

There is a comment in caldav.lib.namespace indicating that it should not be sent in requests where it's not needed. I'll try to investigate it, possibly later today.

[tobixen]

The git commit message reads: Ref https://github.com/python-caldav/caldav/issues/98 - only send the invalid namespace URL http://apple.com/ns/ical if this namespace is actually used.

[tobixen]

This is probably not related to the passing of the invalid namespace anyway. If I understand it correctly, the incompability here is between homeassistant and baikal, and hence unrelated to "my" caldav library.