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POJava WebStart with version Update
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  1. POJava WebStart with version Update
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    copied!<p>I'm using Java WebStart with this simple application that I'm working on and I have also made it so that it would be able to check for updates for the latest versions of the jar file. Although when running it, I get an error message saying that there is a missing version response from the server. </p> <p>below is my code for the jnlp file:</p> <pre><code>&lt;?xml version="1.0" encoding="utf-8"?&gt; &lt;jnlp spec="1.0+" codebase="http://localhost:8081/WebStartLauncher/app" href="Agecalc.jnlp"&gt; &lt;information&gt; &lt;title&gt;Jnlp Testing&lt;/title&gt; &lt;vendor&gt;Peter Ivan &amp; co&lt;/vendor&gt; &lt;homepage href="http://localhost:8081/WebStartLauncher" /&gt; &lt;description&gt;Testing Testing&lt;/description&gt; &lt;icon href="app/index.jpeg" kind="default"/&gt; &lt;icon kind="shortcut" href="app/index.jpeg" width="32" height="32"/&gt; &lt;offline-allowed/&gt; &lt;/information&gt; &lt;security&gt; &lt;all-permissions/&gt; &lt;/security&gt; &lt;resources&gt; &lt;j2se version="1.6+" /&gt; &lt;jar href="AgeCalc__V1.0.jar" version="1.0"/&gt; &lt;jar href="AgeCalc__V1.1.jar" version="1.1"/&gt; &lt;property name="jnlp.versionEnabled" value="true"/&gt; &lt;/resources&gt; &lt;application-desc main-class="com.webstart.AgeCalculator" /&gt; &lt;/jnlp&gt; </code></pre> <p>for the version.xml:</p> <pre><code>&lt;jnlp-versions&gt; &lt;resource&gt; &lt;pattern&gt; &lt;name&gt;AgeCalc__V1.0.jar&lt;/name&gt; &lt;version-id&gt;1.0&lt;/version-id&gt; &lt;/pattern&gt; &lt;file&gt;AgeCalc__V1.0.jar&lt;/file&gt; &lt;/resource&gt; &lt;/jnlp-versions&gt; </code></pre> <p>for the web.xml:</p> <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt; &lt;web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd"&gt; &lt;display-name&gt;WebStartLauncher&lt;/display-name&gt; &lt;welcome-file-list&gt; &lt;welcome-file&gt;webstart.jsp&lt;/welcome-file&gt; &lt;/welcome-file-list&gt; &lt;servlet&gt; &lt;servlet-name&gt;JnlpDownloadServlet&lt;/servlet-name&gt; &lt;servlet-class&gt;jnlp.sample.servlet.JnlpDownloadServlet&lt;/servlet-class&gt; &lt;/servlet&gt; &lt;servlet-mapping&gt; &lt;servlet-name&gt;JnlpDownloadServlet&lt;/servlet-name&gt; &lt;url-pattern&gt;/WebContent/WEB-INF/lib&lt;/url-pattern&gt; &lt;/servlet-mapping&gt; &lt;/web-app&gt; </code></pre> <p>and these are the error logs that i get:</p> <pre><code>com.sun.deploy.net.FailedDownloadException: Unable to load resource: (http://localhost:8081/WebStartLauncher/app/AgeCalc__V1.0.jar, 1.0) at com.sun.deploy.net.DownloadEngine.actionDownload(Unknown Source) at com.sun.deploy.net.DownloadEngine.getCacheEntry(Unknown Source) at com.sun.deploy.net.DownloadEngine.getCacheEntry(Unknown Source) at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(Unknown Source) at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(Unknown Source) at com.sun.deploy.net.DownloadEngine.getResource(Unknown Source) at com.sun.javaws.LaunchDownload.downloadJarFiles(Unknown Source) at com.sun.javaws.LaunchDownload.downloadEagerorAll(Unknown Source) at com.sun.javaws.Launcher.downloadResources(Unknown Source) at com.sun.javaws.Launcher.prepareLaunchFile(Unknown Source) at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source) at com.sun.javaws.Launcher.launch(Unknown Source) at com.sun.javaws.Main.launchApp(Unknown Source) at com.sun.javaws.Main.continueInSecureThread(Unknown Source) at com.sun.javaws.Main$1.run(Unknown Source) at java.lang.Thread.run(Unknown Source) java.io.IOException: missing version response from server at com.sun.deploy.net.DownloadEngine.actionDownload(Unknown Source) at com.sun.deploy.net.DownloadEngine.getCacheEntry(Unknown Source) at com.sun.deploy.net.DownloadEngine.getCacheEntry(Unknown Source) at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(Unknown Source) at com.sun.deploy.net.DownloadEngine.getResourceCacheEntry(Unknown Source) at com.sun.deploy.net.DownloadEngine.getResource(Unknown Source) at com.sun.javaws.LaunchDownload.downloadJarFiles(Unknown Source) at com.sun.javaws.LaunchDownload.downloadEagerorAll(Unknown Source) at com.sun.javaws.Launcher.downloadResources(Unknown Source) at com.sun.javaws.Launcher.prepareLaunchFile(Unknown Source) at com.sun.javaws.Launcher.prepareToLaunch(Unknown Source) at com.sun.javaws.Launcher.launch(Unknown Source) at com.sun.javaws.Main.launchApp(Unknown Source) at com.sun.javaws.Main.continueInSecureThread(Unknown Source) at com.sun.javaws.Main$1.run(Unknown Source) at java.lang.Thread.run(Unknown Source) </code></pre> <p>Please advise on how to proceed. Many thanks!</p>
 

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