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POGenerate JNLP dynamically
 

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    <p>I need to pass argument to JNLP dynamically for which I tried using a servlet which extends <code>JnlpDownloadServlet</code> and then includes a jsp which has all the JNLP XML written into it.</p> <p>But when I invoke the downloaded JNLP I get <code>BadFieldException</code>.</p> <h2>Servlet</h2> <pre><code>public class TestServlet extends JnlpDownloadServlet { public void service(ServletRequest req, ServletResponse res) throws ServletException, IOException { HttpServletRequest request = (HttpServletRequest) req; res.setContentType("application/x-java-jnlp-file"); request.getRequestDispatcher("/jnlp.jsp").include(request, res); } </code></pre> <h2>jnlp.jsp</h2> <p>Used for dumping dynamic JNLP:</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;jnlp spec="1.0+" codebase=&lt;%=request.getScheme() + "://"+ request.getServerName() + ":" + request.getServerPort()+ request.getContextPath() + "/" %&gt; href="test.jnlp"&gt; &lt;information&gt; &lt;title&gt;Demo&lt;/title&gt; &lt;vendor&gt;Sun Microsystems, Inc.&lt;/vendor&gt; &lt;/information&gt; &lt;security&gt; &lt;all-permissions/&gt; &lt;/security&gt; &lt;resources&gt; &lt;j2se version="1.6+" href="http://java.sun.com/products/autodl/j2se"/&gt; &lt;jar href="lib/test.jar" main="true" /&gt; &lt;/resources&gt; &lt;application-desc name="Dynamic Tree Demo Application" main-class="org.Test" width="300" height="300"&gt; &lt;argument&gt;&lt;%=request.getParameter("arg1")%&gt;&lt;/argument&gt; &lt;argument&gt;&lt;%=request.getParameter("arg2")%&gt;&lt;/argument&gt; &lt;/application-desc&gt; &lt;update check="background"/&gt; &lt;/jnlp&gt; </code></pre> <p>I cannot see the request parameters being received correctly in downloaded JNLP but the above <code>request.getScheme</code> and <code>request.getServerName</code> seem to be working fine. Because of argument value not being received correctly I get <code>BadFieldException</code> when JNLP tries to execute.</p> <p>How to solve this?</p>
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    1. COactually it's even harder as you need to include the jnlp in the jar later (for signed jars), so the jar has to be signed dynamically too
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    2. COAre you sure you are using the arguments in the call? Could you provide the url you are using to download the jnlp?
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    3. COI don't intend to include jnlp in the jar again, it works fine without that.
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