Details
-
Bug
-
Resolution: Won't Fix
-
P2
-
6u11
-
x86
-
windows_xp
Backports
| Issue | Fix Version | Assignee | Priority | Status | Resolution | Resolved In Build |
|---|---|---|---|---|---|---|
| JDK-2206869 | 7 | Henry Jen | P2 | Closed | Fixed | b136 |
Description
JRE version: JRE 6u11
OS: IE 6 SP1 and Windows XP SP1
When a JavaScript-to-Java call is described just after object tag in html, the JavaScript call
is sometimes invoked before Server-side Java plugin attempts to start Client-side Java plugin
process, and the call causes an exception.
<body>
<object classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93" width="100" height="100">
<param name="code" value="example/Test" >
<param name="archive" value="Test.class" >
<param name="scriptable" value="true">
</object>
<script>
var obj = document.applets[0];
try {
obj.fromJavaScript();
}
catch(e){
alert("error was occured " + e.message)
}
</script>
</body>
According to the following document, A JavaScript-to-Java call should be blocked until
Applet.init() returns.
http://java.sun.com/javase/6/webnotes/6u10/plugin2/liveconnect/index.html#INITIAL_JS_J_CALL
In Classic plugins (including plugins before 6u10), the code never causes an exception
and the JavaScript-to-Java call is always invoked after Applet.init(). It is a regression.
Customer's reproducible program:
/net/cores.central/cores/dir24/72440542/
test.zip
test_source.zip
Reproduction procedure:
(1) Extract test.zip.
(2) Open test.html using IE 6.
(3) When Test applet in test.html starts, you can see the following messages
in Java Console.
init start
init continue
init continue
init continue
init continue
init continue
init continue
init continue
init continue
init continue
init continue
init end
basic: Applet initialized
basic: Removed progress listener: sun.plugin.util.GrayBoxPainter$GrayBoxProgressListener@578ceb
basic: Applet made visible
basic: Starting applet
basic: Applet started
basic: Told clients applet is started
fromJavaScript start
fromJavaScript end
Where the pair of "init start" and "init end" shows that Applet.init()
was called and the pair of "fromJavaScript start" and "fromJavaScript end"
shows that the method was called by a JavaScript-to-Java call.
The JavaScript-to-Java call is normally blocked until Applet.init() finishes
at the first loading.
(4) Refresh the same page by pressing F5 key.
The JavaScript-to-Java call is not blocked until Applet.init() and
immediately return with an exception at the first and later refresh operations.
If an error dialog appears, it means the exception occurs (See the following
code in test.html) and the JavaScript-to-Java call is not blocked.
var obj = document.applets[0];
try {
obj.fromJavaScript();
}
catch(e){
alert("error was occured " + e.message)
}
OS: IE 6 SP1 and Windows XP SP1
When a JavaScript-to-Java call is described just after object tag in html, the JavaScript call
is sometimes invoked before Server-side Java plugin attempts to start Client-side Java plugin
process, and the call causes an exception.
<body>
<object classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93" width="100" height="100">
<param name="code" value="example/Test" >
<param name="archive" value="Test.class" >
<param name="scriptable" value="true">
</object>
<script>
var obj = document.applets[0];
try {
obj.fromJavaScript();
}
catch(e){
alert("error was occured " + e.message)
}
</script>
</body>
According to the following document, A JavaScript-to-Java call should be blocked until
Applet.init() returns.
http://java.sun.com/javase/6/webnotes/6u10/plugin2/liveconnect/index.html#INITIAL_JS_J_CALL
In Classic plugins (including plugins before 6u10), the code never causes an exception
and the JavaScript-to-Java call is always invoked after Applet.init(). It is a regression.
Customer's reproducible program:
/net/cores.central/cores/dir24/72440542/
test.zip
test_source.zip
Reproduction procedure:
(1) Extract test.zip.
(2) Open test.html using IE 6.
(3) When Test applet in test.html starts, you can see the following messages
in Java Console.
init start
init continue
init continue
init continue
init continue
init continue
init continue
init continue
init continue
init continue
init continue
init end
basic: Applet initialized
basic: Removed progress listener: sun.plugin.util.GrayBoxPainter$GrayBoxProgressListener@578ceb
basic: Applet made visible
basic: Starting applet
basic: Applet started
basic: Told clients applet is started
fromJavaScript start
fromJavaScript end
Where the pair of "init start" and "init end" shows that Applet.init()
was called and the pair of "fromJavaScript start" and "fromJavaScript end"
shows that the method was called by a JavaScript-to-Java call.
The JavaScript-to-Java call is normally blocked until Applet.init() finishes
at the first loading.
(4) Refresh the same page by pressing F5 key.
The JavaScript-to-Java call is not blocked until Applet.init() and
immediately return with an exception at the first and later refresh operations.
If an error dialog appears, it means the exception occurs (See the following
code in test.html) and the JavaScript-to-Java call is not blocked.
var obj = document.applets[0];
try {
obj.fromJavaScript();
}
catch(e){
alert("error was occured " + e.message)
}
Attachments
Issue Links
- backported by
-
JDK-2206869 Regression: JavaScript-to-Java call following object tag sometimes occurs exception.
-
- Closed
-