ISSUES with TopCat

Hi Yori,

sorry about the slow response, I've just got back from a couple
of weeks on holiday.

The error about an unclosed link tag relates to the examples document
at https://gaia.aip.de/tap/examples.
Although it doesn't explicitly say this in the TAP 1.1 specification,
this document must be XHTML, i.e. well-formed XML (unlike HTML,
close tags may not be omitted); this is written in sec 2.3 of DALI 1.1,
to which the TAP examples document must conform.
There are some unclosed elements in that document:

% curl -s https://gaia.aip.de/tap/examples | xmllint -noout -
-:33: parser error : Opening and ending tag mismatch: link line 30 and head
^ -:1551: parser error : Opening and ending tag mismatch: link line 30 and html ^ -:1552: parser error : EndTag: 'which are causing the problem. That means that the machine-readable
examples are not visible from topcat, though it doesn't itself break
other things.

However, this error:

WARNING: Row count for TAP_SCHEMA.columns failed: java.io.IOException:
Unexpected column count: 0 != 1

is reporting something different. The problem here is that the
following query:

SELECT COUNT(*) AS nrow FROM TAP_SCHEMA.columns

which topcat does as part of the metadata acquisition returns a
table with no columns. Looking at it
(REQUEST=doQuery&LANG=ADQL&QUERY=SELECT+COUNT%28*%29+AS+nrow+FROM+TAP_SCHEMA.columns)
the problem seems to be that there is a missing FIELD element in the
output.

If you run topcat with the flags "-verbose -verbose" you can see what
it's doing in a way that may help you to diagnose problems.

Even better, run the stilts taplint command on your service
(topcat -stilts taplint tapurl=https://gaia.aip.de/tap)
which will show up these and other compliance issues in the service,
with hopefully somewhat explanatory explanations - see
http://www.starlink.ac.uk/stilts/sun256/taplint.html

Mark

TODO

solve issue with example page
solve issue with TAP_SCHEMA

Typically this returns an unvalid VOTable:
https://gaia.aip.de/tap/sync?REQUEST=doQuery&LANG=ADQL&QUERY=SELECT+COUNT%28*%29+AS+nrow+FROM+TAP_SCHEMA.columns

Where FIELD (column info) are missing.

With async all is fine.

Regarding the unclosed link tag, it seems that the django-compressor removes the closing tags.

daiquiri/daiquiri/tap/templates/tap/examples.html

Lines 7 to 9 in 33094c5

    
           {% compress css %} 
        
           <link rel="stylesheet" type="text/x-scss" href="{% static 'tap/css/examples.scss' %}" /> 
        
           {% endcompress css %}

results in

<link rel="stylesheet" href="/static/CACHE/css/output.53dea850c36b.css" type="text/css">

It's also the case in the header

daiquiri/daiquiri/core/templates/core/base_head.html

Lines 22 to 27 in 33094c5

    
           {% compress css %} 
        
           <link rel="stylesheet" type="text/x-scss" href="{% static 'core/css/base.scss' %}" /> 
        
           <link rel="stylesheet" type="text/x-scss" href="{% static 'core/css/fonts.scss' %}" /> 
        
           <link rel="stylesheet" type="text/x-scss" href="{% static 'core/css/style.scss' %}" /> 
        
           <link rel="stylesheet" type="text/x-scss" href="{% static 'core/css/codehilite.scss' %}" /> 
        
           {% endcompress %}

is compressed to

<link rel="stylesheet" href="/static/CACHE/css/output.caa75e54c6ac.css" type="text/css">

	{% compress css %}
	<link rel="stylesheet" type="text/x-scss" href="{% static 'tap/css/examples.scss' %}" />
	{% endcompress css %}