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web service call: curl output to xsltproc input

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# 1  
Old 07-15-2011
web service call: curl output to xsltproc input
I need to invoke a web service and extract what I need from the response using a combination of curl and xsltproc. However, any file-based parameters that must be supplied to both these programs must be from stdin and not actual files.

At least with curl, it seems to think that I am supplying a file with the "--data @" parameter, while what I am actually doing is supplying the contents of the expected file via standard input (by placing a hyphen next to the @ symbol). With xsltproc, it is a little more tricky because the syntax is...
Code:
xsltproc stylesheet xml-file

If I used the same trick to supply the XML-file contents to xsltproc via stdin, that works (see below):
Code:
xsltproc remove-soap-envelope.xslt - <<EOF
... // XML response
EOF

...but I don't know how to specify the stylesheet via stdin.

Below are all the relevant details.

The following Bash script sends a SOAP request via curl.
holidayrequest.sh
Code:
ENDPOINT="http://server/webservices/operations-ws"
startDate="2011-06-30"
duration=3
curl --silent --user-agent "" --data @- --header "Content-Type: text/xml; charset=UTF-8" ${ENDPOINT} <<EOF
<?xml version="1.0" encoding="utf-8"?>
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:sch="http://server.com/webservices/operations/schema">
   <soapenv:Header/>
   <soapenv:Body>
      <sch:HolidayRequest>
         <sch:Duration>${duration}</sch:Duration>
         <sch:StartDate>${startDate}</sch:StartDate>
      </sch:HolidayRequest>
   </soapenv:Body>
</soapenv:Envelope>
EOF

The following [sample] SOAP response is received by stdout (formatted for clarity):
Code:
<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:ns2="http://server/webservices/operations/schema">
   <soapenv:Header />
   <soapenv:Body>
      <ns2:HolidayResponse>
         <ns2:Status>Approved</ns2:Status>
      </ns2:HolidayResponse>
   </soapenv:Body>
</soapenv:Envelope>

(I saved the above response to output.xml and transformed it using an XSLT stylesheet remove-soap-envelope.xslt and xsltproc; "Approved" prints to stdout.)

remove-soap-envelope.xslt
Code:
<?xml version="1.0" ?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform">
   <xsl:output method="text" />
   <xsl:template match='//Status'>
      <xsl:value-of select="." />
   </xsl:template>
</xsl:stylesheet>

A push in the right direction will be much appreciated!

Thanks.

Ashwin
Last edited by webuser; 07-16-2011 at 12:10 AM.. Reason: incorrect code
# 2  
Old 07-15-2011
Why can you not hardcode in the name of the stylesheet?

Oh, and by the way, your stylesheet is incorrect. Compare the output of your stylesheet and the following stylesheet
Code:
<?xml version="1.0" ?>
<xsl:stylesheet version="1.0" xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
                              xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"
                              xmlns:ns2="http://server/webservices/operations/schema">

   <xsl:output method="text" />

   <xsl:template match='soapenv:Envelope'>
       <xsl:apply-templates select="soapenv:Body"/>
   </xsl:template>

   <xsl:template match='soapenv:Body'>
       <xsl:apply-templates select="ns2:HolidayResponse"/>
   </xsl:template>

   <xsl:template match='ns2:HolidayResponse'>
       <xsl:apply-templates select="ns2:Status"/>
   </xsl:template>

   <xsl:template match='ns2:Status'>
      <xsl:value-of select="." />
   </xsl:template>


</xsl:stylesheet>

# 3  
Old 07-16-2011
curl and xsltproc
I don't want to maintain a separate file for the stylesheet, if I can help it. And the stylesheet I posted works -- this is straight from working code.

Thanks.
# 4  
Old 07-16-2011
Quote:
And the stylesheet I posted works -- this is straight from working code.
Yes it works - but only by accident. Your stylesheet ignores namespaces. Have you compared the output from each?
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