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Include Base64 encoded data into XML

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Join Date: Sep 2008

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afolli

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Include Base64 encoded data into XML

Sep 11th, 2008

Hello,
I have to base64 encode a large quantity of data and include it in the XML response of the webservice.The WSDL define the XML element in the following way:

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<xs:complexType name="MessagePart">
<xs:simpleContent>
<xs:extension base="xs:base64Binary">
<xs:attribute name="contentType" type="xs:string" default="text/plain" use="optional"/>
<xs:attribute name="length" type="xs:int" default="0" use="optional"/>
<xs:attribute name="offset" type="xs:int" default="0" use="optional"/>
</xs:extension>
</xs:simpleContent>
</xs:complexType>
<xs:complexType name="MessagePart">
<xs:simpleContent>
<xs:extension base="xs:base64Binary">
<xs:attribute name="contentType" type="xs:string" default="text/plain" use="optional"/>
<xs:attribute name="length" type="xs:int" default="0" use="optional"/>
<xs:attribute name="offset" type="xs:int" default="0" use="optional"/>
</xs:extension>
</xs:simpleContent>
</xs:complexType>

I have implemented it but I have some doubts. I'm not sure it's the better way for doing it.

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import org.apache.commons.codec.binary.Base64;
...
 
OMElement part = factory.createOMElement("part", emptyNs);
part.addAttribute("length", this.attachment.getLength(), null);
byte[] value = Base64.encodeBase64(this.attachment.getValue());
part.setText( new String(value) );
import org.apache.commons.codec.binary.Base64;
...

OMElement part = factory.createOMElement("part", emptyNs);
part.addAttribute("length", this.attachment.getLength(), null);
byte[] value = Base64.encodeBase64(this.attachment.getValue());
part.setText( new String(value) );

What about performance if I have an attachment of 1MB? I'm specially worried about the "new String()" operation.
Any suggestion will be appreciated. Thanks,

Alessandro

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~s.o.s~

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Failure as a human

Re: Include Base64 encoded data into XML

Sep 12th, 2008

Why are you encoding textual data? Base64 is primarily meant to encode binary data.

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Join Date: Sep 2008

Posts: 2

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afolli

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Re: Include Base64 encoded data into XML

Sep 16th, 2008

In fact I'm encoding binary data. Actually, I have changed it in the following way.

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import com.sun.xml.rpc.encoding.simpletype.XSDBase64BinaryEncoder;
...
OMElement part = factory.createOMElement("part", emptyNs);
part.addAttribute("length", "" + this.attachment.getLength() + "",null);
part.setText(XSDBase64BinaryEncoder.getInstance().objectToString( this.attachment.get_value() , null ));
import com.sun.xml.rpc.encoding.simpletype.XSDBase64BinaryEncoder;
...
OMElement part = factory.createOMElement("part", emptyNs);
part.addAttribute("length", "" + this.attachment.getLength() + "",null);
part.setText(XSDBase64BinaryEncoder.getInstance().objectToString( this.attachment.get_value() , null ));