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Re: [C2.2] Get Element from uploaded file

by Matthias Müller :: Rate this Message:

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I extended your first approach:

in the flow script I use the inputStream from the uploaded file to feed a XpathEvaluator class in combination with the an xpath expression.

var inputStream = widget.getValue().getInputStream();
var xpath = "/my/path/to/element";
var result = cocoon.getComponent('XPathEvaluator').evaluate(inputStream, xpath);

Thanks again, Matthias

Von: Robby Pelssers <Robby.Pelssers@...>
An: Matthias Müller <pymote@...>; "users@..." <users@...>
Gesendet: 16:22 Donnerstag, 17.November 2011
Betreff: RE: [C2.2] Get Element from uploaded file

I actually had a similar need the other week and while I have used some XML-JAVA mappers like Castor and XStream in the past I decided to try another approach where I generated JSON which can be used from flowscript:

/** flowscript function to generate the pdf **/

function json2Object(json) {

return eval("(" + json + ")");

}

function generatePDF() {

var id = cocoon.parameters.id; //e.g. PH3330L

//var fileName = cocoon.getComponent('fileNameExtractor').getFileName(id);

var output = new Packages.java.io.ByteArrayOutputStream();

var uri = "extractData/" + id;

//now we invoke a pipeline which returns a JSON string. E.g:

/**

* {"id": "PH3330L","fileName": "PH3330L.pdf"},

cocoon.processPipelineTo(uri, null, output);

var responseData = json2Object(output.toString());

var response = cocoon.response;

response.setHeader(

"Content-Disposition",

"attachment; filename=" + responseData.fileName;

);

cocoon.sendPage('source2pdf/' + id);

}

Sitemap:

----------

<!--

{1} id: unique identifier for the source xml used to generate the PDF

-->

<map:match pattern="generatePdf/*">

<map:call function="generatePDF">

<map:parameter name="id" value="{1}"/>

</map:call>

</map:match>

<map:match pattern="source2pdf/*">

<map:generate src="source/{1}.xml"/>

<map:transform src="xslt/source2poi.xslt"/>

<map:serialize type="pdf"/>

</map:match>

<!--

{1} id: unique identifier for the source xml used to generate the PDF

-->

<map:match pattern="extractData/*">

<map:generate src="source/{1}.xml"/>

<map:transform src="extractData.xslt"/>

<map:serialize type="json"/>

</map:match>

/**** ExtractData.xslt will generate a JSON representation of the DATA needed ****/

<?xml version="1.0" encoding="UTF-8"?>

<!--

Author: Robby Pelssers

-->

<xsl:stylesheet version="2.0"

xmlns:xsl="http://www.w3.org/1999/XSL/Transform"

xmlns:xs="http://www.w3.org/2001/XMLSchema">

<xsl:output method="text" version="1.0" encoding="UTF-8"/>

<xsl:template match="/">

<xsl:text>{"id": "</xsl:text><xsl:value-of select="someXpathExpr"/><xsl:text>", "fileName: "</xsl:text><xsl:value-of select="someXpathExpr"/>"}<xsl:text></xsl:text>

</xsl:template>

</xsl:stylesheet>

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