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Is there any way to set a static base URI for https://www.saxonica.com/saxon-c/doc/html/saxonc.html#PyXslt30Processor-compile_stylesheet when passing in the XSLT code as a string?
Added by Martin Honnen almost 5 years ago
The various APIs to XSLT 3 from Python in Saxon-C 1.2.1 allow you to pass in the XSLT code as a Python string, e.g. https://www.saxonica.com/saxon-c/doc/html/saxonc.html#PyXslt30Processor-compile_stylesheet has stylesheet_text
as a possible keyword argument.
However, when doing that, I find no way to set a static base URI so that for instance relative URIs in calls to the doc
or collection
or uri-collection
function can be resolved. The Java API I think for the compile method takes a Java Source where you can provide a base URI, the .NET API has a BaseUri property on the XsltCompiler.
Is there any similar way in the Python API?
Replies (5)
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RE: Is there any way to set a static base URI for https://www.saxonica.com/saxon-c/doc/html/saxonc.html#PyXslt30Processor-compile_stylesheet when passing in the XSLT code as a string? - Added by O'Neil Delpratt almost 5 years ago
Unfortunately currently not possible. The bug issue #4395 is still open to add the base URI method in the C++/PHP/Python APIs. I have added the method on the Saxon/C Java side, but this change requires a maintenance release.
RE: Is there any way to set a static base URI for https://www.saxonica.com/saxon-c/doc/html/saxonc.html#PyXslt30Processor-compile_stylesheet when passing in the XSLT code as a string? - Added by Martin Honnen almost 5 years ago
But that bug is about the base output URI used for resolving relative URIs in xsl:result-document
. This question is about the static base URI that would be used to resolve relative URIs in calls to doc()
, collection()
and uri-collection()
.
If I am not mistaken on the .NET and Java side there are two different methods/setters for these two distinct type of URIs.
RE: Is there any way to set a static base URI for https://www.saxonica.com/saxon-c/doc/html/saxonc.html#PyXslt30Processor-compile_stylesheet when passing in the XSLT code as a string? - Added by O'Neil Delpratt almost 5 years ago
Ah yes you are right. This method is missing. I will create bug issue to keep track of this issue.
As a workaround you should be able to pass the base URI via the set_cwd method on the PyXsltProcessor or PyXslt30Processor before you call the compile_stylesheet function.
Bug issue added: #4411
RE: Is there any way to set a static base URI for https://www.saxonica.com/saxon-c/doc/html/saxonc.html#PyXslt30Processor-compile_stylesheet when passing in the XSLT code as a string? - Added by Martin Honnen almost 5 years ago
I can't seem to get the workaround to use set_cwd
working either:
Here is a simple example:
import saxonc
import os
with saxonc.PySaxonProcessor() as proc:
print(proc.version)
xslt30_processor = proc.new_xslt30_processor()
xslt30_processor.set_cwd(os.getcwd())
xslt30_code = '''<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
exclude-result-prefixes="#all"
version="3.0">
<xsl:param name="pattern" as="xs:string">?select=sample-*.xml</xsl:param>
<xsl:output method="text" item-separator=" "/>
<xsl:template match="/" name="xsl:initial-template">
<xsl:value-of select="$pattern"/>
<xsl:value-of select="static-base-uri()"/>
<xsl:value-of select="doc-available('sample-10.xml')"/>
<!-- <xsl:variable name="input-uris" select="uri-collection($pattern)"/>
<xsl:value-of select="$input-uris"/> -->
</xsl:template>
</xsl:stylesheet>
'''
xslt30_processor.compile_stylesheet(stylesheet_text = xslt30_code)
result = xslt30_processor.call_template_returning_string()
print(result)
This runs without error but only outputs
Saxon/C 1.2.1 running with Saxon-HE 9.9.1.5C from Saxonica
?select=sample-*.xml
true
meaning no static base URI has been set by the set_cwd call.
If remove the comment to try to use uri-collection
I get an error:
Saxon/C 1.2.1 running with Saxon-HE 9.9.1.5C from Saxonica
Error evaluating (fn:uri-collection(...)) in xsl:variable/@select on line 15 column 73
XTDE1162: Relative URI passed to document() function (); but no base URI is available
at template xsl:initial-template on line 11
invoked by unknown caller (null)
None
Complete code that produces that error:
import saxonc
import os
with saxonc.PySaxonProcessor() as proc:
print(proc.version)
xslt30_processor = proc.new_xslt30_processor()
xslt30_processor.set_cwd(os.getcwd())
xslt30_code = '''<?xml version="1.0" encoding="UTF-8"?>
<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
xmlns:xs="http://www.w3.org/2001/XMLSchema"
exclude-result-prefixes="#all"
version="3.0">
<xsl:param name="pattern" as="xs:string">?select=sample-*.xml</xsl:param>
<xsl:output method="text" item-separator=" "/>
<xsl:template match="/" name="xsl:initial-template">
<xsl:value-of select="$pattern"/>
<xsl:value-of select="static-base-uri()"/>
<xsl:value-of select="doc-available('sample-10.xml')"/>
<xsl:variable name="input-uris" select="uri-collection($pattern)"/>
<xsl:value-of select="$input-uris"/>
</xsl:template>
</xsl:stylesheet>
'''
xslt30_processor.compile_stylesheet(stylesheet_text = xslt30_code)
result = xslt30_processor.call_template_returning_string()
print(result)
Is there anything missing in that attempt to use set_cwd
?
RE: Is there any way to set a static base URI for https://www.saxonica.com/saxon-c/doc/html/saxonc.html#PyXslt30Processor-compile_stylesheet when passing in the XSLT code as a string? - Added by O'Neil Delpratt almost 5 years ago
Sorry,
Looking back at the code on the java I see the problem with the workaround. The code has been commented out. A fix for this and a new set base URI function will be available in the next maintenance release, which I will be getting out soon.
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