动态生成JNLP [英] Generate JNLP dynamically

问题描述

我需要动态地将参数传递给JNLP，为此我尝试使用一个扩展 JnlpDownloadServlet 的servlet，然后包含一个jsp，其中写入了所有的JNLP XML。 / p>

但是当我调用下载的JNLP时，我得到 BadFieldException 。

Servlet

  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）; 
} 
  

jnlp.jsp

用于转储动态JNLP：

 <？xml version =1.0encoding =UTF-8？> ; 
< jnlp spec =1.0+codebase =<％= request.getScheme（）+：//+ request.getServerName（）+：+ request.getServerPort（）+ request.getContextPath （）+/％> HREF = test.jnlp > 
< information> 
< title>演示< / title> 
< vendor> Sun Microsystems，Inc.< / vendor> 
< / information> 
< security> 
< all-permissions /> 
< / security> 
< resources> 
< j2se version =1.6+href =http://java.sun.com/products/autodl/j2se/> 
< jar href =lib / test.jarmain =true/> 
< / resources> 
< application-desc name =Dynamic Tree Demo Applicationmain-class =org.Testwidth =300height =300> 
< argument><％= request.getParameter（arg1）％>< / argument> 
< argument><％= request.getParameter（arg2）％>< / argument> 
< / application-desc> 
< update check =background/> 
< / jnlp> 
  

我看不到在下载的JNLP中正确接收到请求参数，但上述 request.getScheme 和 request.getServerName 似乎工作正常。由于参数值未正确接收，JNLP尝试执行时，我会获得 BadFieldException 。

如何解决？

解决方案

逻辑上， href =test.jnlp应该是像 href =test.jnlp？arg1 = blah& arg2 = tah。

AFAIU JWS客户端将使用JNLP中所述的确切的 coodebase / href 返回服务器。

此外，绝对听取最好的消息。

I need to pass argument to JNLP dynamically for which I tried using a servlet which extends JnlpDownloadServlet and then includes a jsp which has all the JNLP XML written into it.

But when I invoke the downloaded JNLP I get BadFieldException.

Servlet

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);  
}  

jnlp.jsp

Used for dumping dynamic JNLP:

<?xml version="1.0" encoding="UTF-8"?>
<jnlp spec="1.0+" codebase=<%=request.getScheme() + "://"+ request.getServerName() + ":" + request.getServerPort()+ request.getContextPath() + "/" %> href="test.jnlp">
  <information>
   <title>Demo</title>
   <vendor>Sun Microsystems, Inc.</vendor>
  </information>
  <security>
   <all-permissions/>
  </security>
  <resources>
   <j2se version="1.6+" href="http://java.sun.com/products/autodl/j2se"/>
   <jar href="lib/test.jar" main="true" />
  </resources>
  <application-desc name="Dynamic Tree Demo Application" main-class="org.Test" width="300"   height="300">
       <argument><%=request.getParameter("arg1")%></argument>  
       <argument><%=request.getParameter("arg2")%></argument>
  </application-desc>
  <update check="background"/>
</jnlp>

I cannot see the request parameters being received correctly in downloaded JNLP but the above request.getScheme and request.getServerName seem to be working fine. Because of argument value not being received correctly I get BadFieldException when JNLP tries to execute.

How to solve this?

解决方案

Logically, href="test.jnlp" should be something like href="test.jnlp?arg1=blah&arg2=tah".

AFAIU the JWS client will reach back to the server using the exact coodebase/href stated in the JNLP.

Also, definitely listen to what bestsss has to say.

这篇关于动态生成JNLP的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！