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KB Article #176031

XSLT Transformation filter fails with nested fault "XML parse failed: libxml error 9: Input is not proper UTF-8" when using special characters

Problem

XSLT Transformation filter fails with nested fault "XML parse failed: libxml error 9: Input is not proper UTF-8" when using special characters

XSLT Transformation filter is being used to remove the namespaces from a web service XML response. The issue occurs when special characters are present in the XML reposnse. e.g.

<?xml version="1.0" encoding="utf-8" standalone="no"?>
<soap:Envelope xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/">
<soap:Body>
<tns:Response xmlns:tns="http://www.axway.com">UTF-8 special characters test é € @</tns:Response> ;
</soap:Body>
</soap:Envelope>

The full error message is:

nested fault: XML parse failed: libxml error 9: Input is not proper UTF-8, indicate encoding ! Bytes: 0x80 0x20 0x40 0x20 : java.io.IOException: XML parse failed: libxml error 9: Input is not proper UTF-8, indicate encoding ! Bytes: 0x80 0x20 0x40 0x20 at com.vordel.mime.XMLBody.parse(XMLBody.java:122) at com.vordel.mime.Body.parse(Body.java:260)

Resolution

UTF-8 encoding can be set for the API Gateway if not the default.

In a UNIX environment:

$ env | grep UTF

LANG=en_US.UTF-8
GDM_LANG=en_US.UTF-8

If not already UTF-8 set it with a command similar to below with any local language variant: e.g.

$ export LANG=en_US.UTF-8

For the JRE add the attached jvm.xml in the
Gateway_install/conf directory:

It contains the following line

<VMArg name="-Dfile.encoding=UTF-8" />

If there is already a jvm.xml located in the API Gateway_install/conf directory simply add the line above between the <ConfigurationFragment> nodes.

Restart the API Gateway.