Details
-
Bug
-
Resolution: Fixed
-
P3
-
1.4.0
-
beta2
-
x86, sparc
-
linux, solaris_7, solaris_8, windows_98
-
Verified
Description
Name: dfR10049 Date: 07/24/2001
Java(TM) Plug-in: Version 1.4.0
Using JRE version 1.4.0-beta Java HotSpot(TM) Client VM
does not throw exception when try to open stream with URL created
with unknown host. (on Solaris 2.8 with Netscape 4.76)
Plugin version of 1.3.1 throws java.io.FileNotFoundException in this case
This is the test demonstrating the bug:
------------------------------------------------------------------
import java.net.URL;
import java.net.MalformedURLException;
import java.io.InputStream;
import java.applet.Applet;
import java.awt.Graphics;
public class IOE extends Applet {
public static void main (String args[]){
System.out.println(test());
}
public void paint(Graphics g) {
String result = test();
System.out.println(result);
g.drawString(result, 50, 25);
}
static String test() {
URL url = null;
try {
url = new URL("http://unknownhost/files");
} catch (MalformedURLException e) {
return "TEST FAILED: Unexpected exception:" + e;
}
try {
InputStream is = url.openStream();
return "TEST FAILED with " + url + "no exceptions, stream: " + is;
} catch (Exception e) {
return "TEST PASSED. " + e + " thrown";
}
}
}
---------------------- pluginIOE.html -------------------------------
<html>
<title> URL Test</title>
<body>
<center><h1> URL.openStream() with unknown hosts </h1></center>
<hr>
<EMBED type="application/x-java-applet;version=1.3"
width="800"
height="200"
align="baseline"
code="IOE.class">
<NOEMBED>
No Java 2 SDK, Standard Edition v 1.3 support for APPLET!!
</NOEMBED>
</EMBED>
</body>
</html>
---------------------------------------------------------------------
output from the test:
running from command line:
#> java IOE
TEST PASSED. java.net.UnknownHostException: unknownhost throw
#---
running with:
Java(TM) Plug-in: Version 1.3.1
Using JRE version 1.3.1 Java HotSpot(TM) Client VM(
TEST PASSED. java.io.FileNotFoundException: http://unknownhost/files throwng
#---
running with:
Java(TM) Plug-in: Version 1.4.0
Using JRE version 1.4.0-beta_refresh Java HotSpot(TM) Client VM
TEST FAILED with http://unknownhost/files no exceptions, stream: sun.plugin.usability.ProgressInputStream@3a4211
It is incorrect behavior to return input stream on inexistent resource.
It breaks compatibility. The correct way is throwing IOException.
======================================================================