Bad XML output on 0 hits
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Tomaž Erjavec
May 28, 2020, 3:13:45 AM5/28/20
to NoSketch Engine
Hi,
SkE URLs have the very useful "format" parameter, and I've just written
a small XSLT script, where you give it a list of CQL query / corpus name
pairs, and the XSLT constructs the query URLs with &format=xml,
retrieves the concordances via the document() function, slightly
polishes the results and returns a XML document with all the hits. So
far, so good.
However, if any query returns 0 results, the return XML ends with a
"spam" comment which contains a HTML page with a a stack trace, as if an
error occurred, as below.
The problem is that the <body> elements in the comment end with "-->",
i.e. the XML comment in fact ends there, and the rest is taken as part
of the XML, resulting in ill-formed XML, which can't be parsed and hence
used.
It is not a big issue, but it would simplify matters for those using the
XML output if the complete spam comment at the end were removed, or at
least if all the "-->" were removed from it.
Best,
Tomaž
Example XML output with 0 hits:
<?xml version='1.0' encoding='UTF-8' ?>
<export>
<header>
<corpus>imp</corpus>
<subcorpus>-</subcorpus>
<query>
<subquery operation="Query" size="0">[lc="tvit" |
lemma_lc="tvit"]</subquery>
</query>
</header>
<concordance>
<!--: spam
Content-Type: text/html
<body bgcolor="#f0f0f8"><font color="#f0f0f8" size="-5"> -->
<body bgcolor="#f0f0f8"><font color="#f0f0f8" size="-5"> --> -->
</font> </font> </font> </script> </object> </blockquote> </pre>
</table> </table> </table> </table> </table> </font> </font>
</font><body bgcolor="#f0f0f8">
<table width="100%" cellspacing=0 cellpadding=2 border=0 summary="heading">
<tr bgcolor="#6622aa">
<td valign=bottom> <br>
<font color="#ffffff" face="helvetica,
arial"> <br><big><big><strong><type
'exceptions.KeyError'></strong></big></big></font></td><td
align=right valign=bottom><font color="#ffffff" face="helvetica,
arial">Python 2.7.17: /usr/bin/python<br>Wed May 27 17:46:56
2020</font></td></tr></table>
<p>A problem occurred in a Python script. Here is the sequence of
function calls leading up to the error, in the order they occurred.</p>
...
SkE URLs have the very useful "format" parameter, and I've just written
a small XSLT script, where you give it a list of CQL query / corpus name
pairs, and the XSLT constructs the query URLs with &format=xml,
retrieves the concordances via the document() function, slightly
polishes the results and returns a XML document with all the hits. So
far, so good.
However, if any query returns 0 results, the return XML ends with a
"spam" comment which contains a HTML page with a a stack trace, as if an
error occurred, as below.
The problem is that the <body> elements in the comment end with "-->",
i.e. the XML comment in fact ends there, and the rest is taken as part
of the XML, resulting in ill-formed XML, which can't be parsed and hence
used.
It is not a big issue, but it would simplify matters for those using the
XML output if the complete spam comment at the end were removed, or at
least if all the "-->" were removed from it.
Best,
Tomaž
Example XML output with 0 hits:
<?xml version='1.0' encoding='UTF-8' ?>
<export>
<header>
<corpus>imp</corpus>
<subcorpus>-</subcorpus>
<query>
<subquery operation="Query" size="0">[lc="tvit" |
lemma_lc="tvit"]</subquery>
</query>
</header>
<concordance>
<!--: spam
Content-Type: text/html
<body bgcolor="#f0f0f8"><font color="#f0f0f8" size="-5"> -->
<body bgcolor="#f0f0f8"><font color="#f0f0f8" size="-5"> --> -->
</font> </font> </font> </script> </object> </blockquote> </pre>
</table> </table> </table> </table> </table> </font> </font>
</font><body bgcolor="#f0f0f8">
<table width="100%" cellspacing=0 cellpadding=2 border=0 summary="heading">
<tr bgcolor="#6622aa">
<td valign=bottom> <br>
<font color="#ffffff" face="helvetica,
arial"> <br><big><big><strong><type
'exceptions.KeyError'></strong></big></big></font></td><td
align=right valign=bottom><font color="#ffffff" face="helvetica,
arial">Python 2.7.17: /usr/bin/python<br>Wed May 27 17:46:56
2020</font></td></tr></table>
<p>A problem occurred in a Python script. Here is the sequence of
function calls leading up to the error, in the order they occurred.</p>
...
Miloš Jakubíček
May 28, 2020, 3:49:47 AM5/28/20
to Tomaž Erjavec, NoSketch Engine
This is a feature of Python's cgitb module. If you disable it in run.cgi, it will go away.
Best
Milos
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Tomaž Erjavec
May 28, 2020, 5:56:40 AM5/28/20
to NoSketch Engine
Hi Miloš,
thanks for the answer - I tried it out, and the comment indeed
disappears. However, the resulting XML is now truncated, i.e. it
is still invalid and now looks like this:
<?xml version='1.0' encoding='UTF-8' ?>
<export>
<header>
<corpus>ssj500k22</corpus>
<subcorpus>-</subcorpus>
<query>
<subquery operation="Query"
size="0">[lc="kravaxxxx" |
lemma_lc="kravaxxxx"]</subquery>
</query>
</header>
<concordance>
Best,
Tomaž
Miloš Jakubíček je 28/05/2020 ob
09:49 napisal:
Tomáš Svoboda
Jun 15, 2020, 4:31:03 AM6/15/20
to NoSketch Engine
Hi everyone,
Tomaž and I have already solved the issue. The problem was using an obsolete Bonito. Described bug is already fixed in the current version.
Best regards
Tomas
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