json-to-xml cannot extract data

[Patrick Cailly]

what's wrong with this config ( simple test ? ! )

<config>
<var-def name="params">
<xpath expression="data(//height)">
<json-to-xml>
<http url="http://gallica.bnf.fr/proxy?method=M&amp;ark=btv1b7710894p.f1"/>
</json-to-xml>
</xpath>

</var-def>

<file action="write" path="/home/metronome/harvest/bnf_image/params.txt" charset = "utf-8" >
    <template>
        WIDTH : {$height}
    </template>

</file>

</config>

[Patrick Cailly]

the config has been cut

[nutcracker]

you could add a root code. like this:

<var-def name="p">
<template>&lt;aaa&gt;${params}&lt;/aaa&gt;</template>
</var-def>