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Regression? Unknown parameter: 'wrap' in 8.0.x

Wednesday, 18 February 2015 · 4 messages
GB
Gioele Barabucci18 Feb 2015 10:41 #
Hello, I am toying around with BaseX 8.0.1 (beta 161c4fd) and it looks like there is a regression from BaseX 7.9. In BaseX 7.9 I could issue the following POST query via the REST interface.
     <query xmlns="http://basex.org/rest">
             <text>...</text>
             <parameter name='wrap' value='yes'/>
     </query>
Now, the same query raises an exception in the server:
     org.basex.http.HTTPException: Unknown parameter: 'wrap'.
         at org.basex.http.HTTPCode.get(HTTPCode.java:55)
         at org.basex.http.rest.RESTPost.get(RESTPost.java:65)
         at org.basex.http.rest.RESTServlet.code(RESTServlet.java:43)
Has something been changed in the way REST requests are processed? What is the proper way in 8.0.x to wrap results? Regards,
-- Gioele Barabucci <gioele at svario.it>
GB
Gioele Barabucci18 Feb 2015 11:14 #
Quoted text · Gioele Barabucci · 10 lines
Am 18.02.2015 um 10:41 schrieb Gioele Barabucci: > Hello, > > I am toying around with BaseX 8.0.1 (beta 161c4fd) and it looks like > there is a regression from BaseX 7.9. > > [...] > > Has something been changed in the way REST requests are processed? What > is the proper way in 8.0.x to wrap results?
It looks like support for wrapping results has been removed recently in this commit in favour of a new "adaptive" serialization method. https://github.com/BaseXdb/basex/commit/7619d16cc611f4f0ccd2e77e3f12322a263c4782 Given that in my use-case (uncontrolled user queries [1]) I need each result to be wrapped, could someone suggest a reliable workaround? [1] https://github.com/gioele/xpathquery/blob/master/lib/xpathquery/basex.rb#L42
-- Gioele Barabucci <gioele at svario.it>
CG
Christian Grün18 Feb 2015 11:41 #
Hi Gioele, Good to hear that the query is evaluated faster now.
Quoted text · Gioele Barabucci · 1 line
> It looks like support for wrapping results has been removed recently [...]
Exactly, the wrap parameter was removed. The reason was that our wrapping mechanism never really fit well together with the existing serialization parameters (unless the default parameters were used).
Quoted text · Gioele Barabucci · 2 lines
> Given that in my use-case (uncontrolled user queries [1]) I need each result > to be wrapped, could someone suggest a reliable workaround?
The easiest way out is to wrap your results via XQuery. If your query string is "/a/b/c", you could e.g. rewrite it to: ( /a/b/c ) ! element wrap { . } Cheers, Christian [1] http://docs.basex.org/wiki/Serialization
GB
Gioele Barabucci18 Feb 2015 13:42 #
Quoted text · Christian Grün · 5 lines
Am 18.02.2015 um 11:41 schrieb Christian Grün: > The easiest way out is to wrap your results via XQuery. If your query > string is "/a/b/c", you could e.g. rewrite it to: > > ( /a/b/c ) ! element wrap { . }
Thank you for the suggestion. My current solution looks like this:
     declare namespace basex='http://basex.org/rest';

     let $results := ( QUERY ) ! element basex:result { . }
     return <basex:results>{$results}</basex:results>
This simulates well enough the wrapped results as returned by BaseX 7.9. Regards,
-- Gioele Barabucci <gioele at svario.it>

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