Re: JNLP validation

From:

Owen Jacobson <angrybaldguy@gmail.com>

Newsgroups:

comp.lang.java.programmer

Date:

Thu, 27 Mar 2008 08:53:35 -0700 (PDT)

Message-ID:

<94e7cbd5-e35c-44ec-8dda-2d9193a084bf@d4g2000prg.googlegroups.com>

On Mar 27, 10:40 am, Roedy Green <see_webs...@mindprod.com.invalid>
wrote:

I took Sun's DTD to validate JNLP 6.0 athttp://java.sun.com/dtd/JNLP-6.0.dtd
and ran in through the DTD->XSD converter athttp://www.hitsw.com/xml_utilites/

I then I tried validating one of my JNLP files. It seems to think you
are not supposed to nest <java inside <resources which Sun's example
says is kosher.

Presumably the problem is the DTD->XSD conversion process was flawed.
The XSD is baffling. It seems to show both <java inside <resources and
<resources inside <java.

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


<jnlp spec="6.0+" codebase="http://mindprod.com/replicator"
href="replicatorreceiverwebsite.jnlp" version="9.8">
  <information>
    <title>The Replicator 9.8 via website</title>

    <vendor>Canadian Mind Products</vendor>
    <homepage href="webstart/replicator.html" />

    <description>Replicates files via website. Also keeps them up to
date efficiently.</description>
    <description kind="short">Replicates files via
website.</description>
    <description kind="one-line">Replicates files via
website.</description>
    <description kind="tooltip">the Replicator</description>
    
    <icon href="replicatoricon64.png" width="64" height="64"
kind="default" />
    <icon href="replicatorsplash.png" width="128" height="128"
kind="splash" />
    
    
    <shortcut online="true">
      <desktop />
      <menu submenu="The Replicator" />
    </shortcut>
  </information>

  <security>
    <all-permissions />
  </security>

  <update check="always" policy="always" />

  <resources>
    
    
    <java version="1.6.0_05"
href="http://java.sun.com/products/autodl/j2se" java-vm-args="-ea"
initial-heap-size="128m" max-heap-size="512m" />
    <java version="1.6+"
href="http://java.sun.com/products/autodl/j2se" java-vm-args="-ea"
initial-heap-size="128m" max-heap-size="512m" />
    
    <java version="1.6+" java-vm-args="-ea" initial-heap-size="128m"
max-heap-size="512m" />

    
    <jar href="replicator.jar" main="true" download="eager" />

    
    <property name="VIA" value="website" />
    <property name="PROJECT_NAME" value="Mindprod.com" />
    <property name="UNIQUE_PROJECT_NAME"
value="com.mindprod.replicator" />
    <property name="SUGGESTED_RECEIVER_BASE_DIR" value="C:\mindprod"
/>
    <property name="SUGGESTED_RECEIVER_ZIP_STAGING_DIR"
value="C:\mpstaging" />
    <property name="WEBSITE_ZIP_URL"
value="http://mindprod.com/replicator" />
    <property name="SUGGESTED_LAN_ZIP_URL"
value="http://mindprod.com/replicator" />
    <property name="KEEP_ZIPS" value="false" />
    <property name="UNPACK_ZIPS" value="true" />
    <property name="AUTHENTICATION" value="none" />
    <property name="DEBUGGING" value="true" />
  </resources>

  
  <application-desc main-class="com.mindprod.replicator.Replicator" />

</jnlp>

I've uploaded this document, plus the appropriate <!DOCTYPE directive,
to my own server at <http://bast.lionsanctuary.net/~owen/jnlp> and
used
the W3C markup validator - which determined that the document is
invalid per the DTD. Here is its output:

    Line 204, Column 16: character ">" invalid: only delimiter "-",
    number, "ANY", "CDATA", "EMPTY", "O", "RCDATA" and parameter
    separators allowed. ...

    Line 629, Column 29: name start character invalid: only delimiter
    "&", delimiter "|", delimiter ",", delimiter ")" and token
    separators are allowed. ...

    Line 31, Column 27: element "shortcut" undefined. <shortcut
    online="true">

    You have used the element named above in your document, but the
    document type you are using does not define an element of that
    name.

    Line 39, Column 42: element "update" undefined. <update
    check="always" policy="always" />

    You have used the element named above in your document, but the
    document type you are using does not define an element of that
    name.

I believe the first two errors are related to parsing problems with
the
DTD - the XML document itself is not 204 lines long, and the error
message relates to the validity of a DTD, not to a document. The Sun
DTD
contains errors in the definitions of the 'update' and 'shortcut'
elements, and this should be reported to Sun as a bug:

  <update> should be <!ELEMENT update EMPTY>
  <shortcut> should be <!ELEMENT shortcut (desktop?, menu?)>

I uploaded a mutilated copy of the DTD alongside the document (which
is
what you see if you look at the document now) that contains fixes for
these bugs. This is sufficient to allow DTD-based validation to
complete:

  <http://validator.w3.org/check?uri=http%3A%2F
%2Fbast.lionsanctuary.net%2F%7Eowen%2Fjnlp&charset=%28detect
+automatically%29&doctype=Inline&group=0>

More to come...
-o

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