Saxon » SaxonJS

It seems const sef = SaxonJS.compile(xslDoc); is not part of the publicly documented API. Do you get the error on the compile call on Node.js? Or later, on the attempt to transform? I would try to check/infer whether the compile call takes an argument or option, similar to the command line, to declare -relocate:on. That might help to have the files found.

You haven't shown in all detail how your base stylesheet URI looks for the /tmp directory, I would think it needs to be e.g. file:/tmp/.

What should be possible is to use SaxonJS.XPath.evaluate to call fn:transform:

'use strict';

const SaxonJS = require('saxon-js');

const transformXml = (xml, xslt, xsltBaseUri) => {
	try {

		const result = SaxonJS.XPath.evaluate(`
			  transform(
				  map {
					  'stylesheet-text' : $xslt,
					  'stylesheet-base-uri' : $xsltBaseUri,
					  'source-node' : parse-xml($xml),
					  'delivery-format' : 'raw'
				  }
			  )
		  `,
			[],
			{
				params: {
					xml: xml,
					xslt: xslt,
					xsltBaseUri: xsltBaseUri
				}
			}

		);

		return SaxonJS.serialize(result.output, { method: "xml" });
	} catch (error) {
		console.error(`Transform err: ${error.message}`);
	}
};

const xml = `<root>
  <item>b</item>
  <item>c</item>
  <item>a</item>
</root>`;

const xslt = `<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  version="3.0"
  xmlns:xs="http://www.w3.org/2001/XMLSchema"
  exclude-result-prefixes="#all"
  expand-text="yes">

  <xsl:import href="module-test1.xsl"/>

  <xsl:mode on-no-match="shallow-copy"/>

  <xsl:output indent="yes"/>

  <xsl:template match="/" name="xsl:initial-template">
    <xsl:copy>
	  <xsl:apply-templates/>
	  <xsl:comment>Run with {system-property('xsl:product-name')} {system-property('xsl:product-version')} {system-property('Q{http://saxon.sf.net/}platform')}</xsl:comment>
	</xsl:copy>
  </xsl:template>
  
</xsl:stylesheet>`;

console.log(transformXml(xml, xslt, `file:///C:/Users/username/AppData/Local/Temp/`));

Thanks for replying Martin.

No, there seems no public documentation on that, but I found it somewhere and it certainly works.

If I use the following adaption of your code with the undocumented API I can run it successfully under both Windows and Linux:

'use strict';

const SaxonJS = require('saxon-js');

const url = require('url');


const transformXml = (xml, xslt, xsltBaseUri) => {
	try {
		const env = SaxonJS.getPlatform();
		const xslDoc = env.parseXmlFromString(xslt);

		xslDoc._saxonBaseUri = xsltBaseUri; 

		const sef = SaxonJS.compile(xslDoc);

		const result = SaxonJS.transform({
			stylesheetInternal: sef,
			sourceText: xml,
			logLevel: 1,
		});

		return SaxonJS.serialize(result.principalResult, { method: "xml" });
	} catch (error) {
		console.error(`Transform err: ${error.message}`);
	}
};

const xml = `<root>
  <item>b</item>
  <item>c</item>
  <item>a</item>
</root>`;

const xslt = `<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  version="3.0"
  xmlns:xs="http://www.w3.org/2001/XMLSchema"
  exclude-result-prefixes="#all"
  expand-text="yes">

  <xsl:import href="module-test1.xsl"/>

  <xsl:mode on-no-match="shallow-copy"/>

  <xsl:output indent="yes"/>

  <xsl:template match="/" name="xsl:initial-template">
    <xsl:copy>
	  <xsl:apply-templates/>
	  <xsl:comment>Run with {system-property('xsl:product-name')} {system-property('xsl:product-version')} {system-property('Q{http://saxon.sf.net/}platform')}</xsl:comment>
	</xsl:copy>
  </xsl:template>
  
</xsl:stylesheet>`;

console.log(process.env.TEMP)

const temp_dir = process.env.TEMP;

var temp_dir_url = url.pathToFileURL(temp_dir).href;

if (!temp_dir_url.endsWith('/')) {
	temp_dir_url += '/';
}

console.log(transformXml(xml, xslt, temp_dir_url));

It assumes an environment variable TEMP is set to a directory where the module-test1.xsl is found. Somehow WSL Ubuntu Linux or perhaps Ubuntu Linux in general does not have a predefined TMP o TEMP environment variable.

Really appreciate the code, Martin, thank you.

However, the result is the same.

2023-06-28T10:21:47.338+01:00	2023-06-28T09:21:47.338Z a6e0ec33-4751-4e2d-9850-8e487da51dec INFO baseURI set to: file:///tmp

2023-06-28T10:21:47.338+01:00	2023-06-28T09:21:47.338Z a6e0ec33-4751-4e2d-9850-8e487da51dec INFO fs.existsSync("/tmp/landing-pages.xsl") true

2023-06-28T10:21:47.692+01:00	2023-06-28T09:21:47.692Z a6e0ec33-4751-4e2d-9850-8e487da51dec ERROR Transform err: xsl:import of file:///landing-pages.xsl failed:Cannot read file file:///landing-pages.xsl - ENOENT: no such file or directory, open '/landing-pages.xsl'

Seemingly, it's because the Transform is not looking in the correct place. Question is: how do I get it to do that?

const temp_dir = process.env.TEMP;

..is exactly what I have, although no trailing backslash.

But, even with one, the result is the same.

2023-06-28T10:28:02.887+01:00	2023-06-28T09:28:02.887Z bcdf61bd-14b3-468b-b26f-1c3fd3e58652 INFO baseURI set to: file:///tmp/

2023-06-28T10:28:02.887+01:00	2023-06-28T09:28:02.887Z bcdf61bd-14b3-468b-b26f-1c3fd3e58652 INFO fs.existsSync("/tmp//landing-pages.xsl") true

2023-06-28T10:28:03.231+01:00	2023-06-28T09:28:03.231Z bcdf61bd-14b3-468b-b26f-1c3fd3e58652 ERROR Transform err: xsl:import of file:///landing-pages.xsl failed:Cannot read file file:///landing-pages.xsl - ENOENT: no such file or directory, open '/landing-pages.xsl'

FYI, this works:

<xsl:import href="/tmp/landing-pages.xsl" />

But, I don't want to include the path since the same stylesheet is used in another application.

Yes, I am sorry, I don't know how to use that API, as I commented, I guess the -relocate:on setting from the command line somehow needs to be set from the API but I don't know where/how and the minimized source code of the released module is hard to read.

Wait whether someone from Saxonica tells you whether and how you can use that API for your use case.

Thanks Martin. I appreciate your replies.

Thanks to both.

I finally got it working with Martin's

const result = SaxonJS.XPath.evaluate(` ....

It seems the trailing slash on the BaseUri is critical. With it, it works. Without it, it fails and (slightly oddly) the path doesn't get reported in the error (ie the unfound file:///tmpimported.xsl gets reported as file:///imported.xsl).

John Cotton wrote in #note-12:

Thanks to both.

I finally got it working with Martin's

const result = SaxonJS.XPath.evaluate(` ....

It seems the trailing slash on the BaseUri is critical. With it, it works. Without it, it fails and (slightly oddly) the path doesn't get reported in the error (ie the unfound file:///tmpimported.xsl gets reported as file:///imported.xsl).

John Cotton wrote in #note-12:

Thanks to both.

I finally got it working with Martin's

const result = SaxonJS.XPath.evaluate(` ....

It seems the trailing slash on the BaseUri is critical. With it, it works. Without it, it fails and (slightly oddly) the path doesn't get reported in the error (ie the unfound file:///tmpimported.xsl gets reported as file:///imported.xsl).

You can try resolve-uri('imported.xsl', 'file:///tmp') with other XPath 2/XSLT 2 or later or XQuery implementations like BaseX, the result is indeed file:///imported.xsl. So file URI resolution if you have a file URI denoting a folder or directory as the base URI is only ending up with a URI in that directory if the base URI ends in a slash.