通过urlconnection调用html嵌入的小程序

发布于 2024-11-18 11:26:55 字数 1223 浏览 1 评论 0原文

我有以下简单的嵌入小程序 html 页面：

<html>
    <applet code="WelcomeApplet.class" archive="WelcomeApplet.jar" width=300 height=30>
    </applet>
</html>

如果我调用此页面（即地址是“http://192.168.0.2/WelcomeApplet.html”），小程序正确显示在浏览器中。

我应该仅通过 servlet 调用此页面，因为不应显示 url 页面，因此在 doGet servlet 方法中插入以下代码：

URL url = new URL("http://192.168.0.2/WelcomeApplet.html");    
URLConnection conn = url.openConnection();     
conn.setRequestProperty("Content-Language", "en-US");    
conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");    
conn.setDoInput(true);    
conn.setUseCaches(false);    
conn.setAllowUserInteraction(true);    

BufferedInputStream buffer = new BufferedInputStream(conn.getInputStream());    
StringBuilder builder = new StringBuilder();    
int byteRead;    
while ((byteRead = buffer.read()) != -1)    
    builder.append((char) byteRead);    
buffer.close();    
out.write(builder.toString());

一切正常，解析的 html 与上面相同，但是小程序未显示，JVM 报告：“WelcomeApplet.class not found”

看起来不是安全问题，而是实现问题（我猜）。

有什么想法吗？

谢谢

原文

I have the following simple embedding applet html page:

<html>
    <applet code="WelcomeApplet.class" archive="WelcomeApplet.jar" width=300 height=30>
    </applet>
</html>

If I call for this page (i.e. the address is "http://192.168.0.2/WelcomeApplet.html"),
the applet is correctly shown in the browser.

I should call this page only by a servlet because the url page should not be shown, so in the doGet servlet method the following code is inserted:

URL url = new URL("http://192.168.0.2/WelcomeApplet.html");    
URLConnection conn = url.openConnection();     
conn.setRequestProperty("Content-Language", "en-US");    
conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");    
conn.setDoInput(true);    
conn.setUseCaches(false);    
conn.setAllowUserInteraction(true);    

BufferedInputStream buffer = new BufferedInputStream(conn.getInputStream());    
StringBuilder builder = new StringBuilder();    
int byteRead;    
while ((byteRead = buffer.read()) != -1)    
    builder.append((char) byteRead);    
buffer.close();    
out.write(builder.toString());

Everything works fine the html parsed is the same as above, but the applet is not shown, the JVM reports : "WelcomeApplet.class not found"

It looks like is not a security problem, but an implementation stuff (i guess).

Any idea?

Thanks

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