Home » Eclipse Projects » Remote Application Platform (RAP) » Occasional Network Error popup
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| Re: Occasional Network Error popup [message #1738655 is a reply to message #1738615] |
Thu, 21 July 2016 18:32   |
 Vincenzo Caselli
Messages: 202
Registered: January 2012 |
Senior Member |
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Hi Ivan,
I was on a customer pc today, so I made some tests:
- I tried several times to reproduce the problem on Chrome (the only alternative browser allowed here) and it never happened!
- IE 10 seems updated to 10.0.35 (KB3124275)
- I couldn't find a way to inspect the statusCode, but the IE console showed this error (not shown in Chrome console)
Quote:SCRIPT7002: XMLHttpRequest: Errore di rete 0x2eff, Impossibile completare l'operazione a causa di un errore 00002eff.
(translated is: Network error 0x2eff, Impossible to complete the operation because of error 00002eff)
Does this help?
Thank you
Vincenzo
[Updated on: Thu, 21 July 2016 18:34] Report message to a moderator |
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| Re: Occasional Network Error popup [message #1738693 is a reply to message #1738689] |
Fri, 22 July 2016 10:14 |
Ivan Furnadjiev
Messages: 2277
Registered: July 2009
Location: Sofia, Bulgaria |
Senior Member |
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Hi Vincenzo,
there is always a 'hack' :-). You could patch the JavaScript
ErrorHandler.js#showErrorBox function at runtime with
JavaScriptExecutor. Execute a script in your entry point like this:
---
(function() {
var origShowErrorBox= rwt.runtime.ErrorHandler.showErrorBox;
rwt.runtime.ErrorHandler.showErrorBox = function(errorType, freeze,
errorDetails) {
if (errorType !== "connection error") {
origShowErrorBox(errorType, freeze, errorDetails);
}
};
}());
---
This will skip the error box if errorType is "connection error" and call
original function otherwise.
Note, that this approach (patching RAP client at runtime) is really,
really a BIG hack :-) and it's not recommended as RAP internals (RAP
client) can change between RAP versions without notice.
Regards,
Ivan
--
Ivan Furnadjiev
Twitter: @EclipseRAP
Blog: http://eclipsesource.com/blogs/
Professional services for RAP and RCP?
http://eclipsesource.com/services/rap/
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| Re: Occasional Network Error popup [message #1738737 is a reply to message #1738693] |
Fri, 22 July 2016 18:21 |
Vincenzo Caselli
Messages: 202
Registered: January 2012 |
Senior Member |
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Wow, great!
Ok, we are perfectly aware that this is a bad practice, but risks are under control if balanced with finding a working solution.
And It works! but I was a little in a rush and was not precise.
Given that when the "Network popup" appears, it is sufficient to click on Retry button to get back to normal functionality, I would like to automate this.
So my original request to not showing the popup should indeed be reformulated in: "when the problem occours simulate a Retry action, ideally avoiding the popup, but not necessarily, since the Retry action just after should take care of closing it, maybe even whitout making the user aware of it".
Should I do something like this (I put your previous code in the unique Perspective class that I have, is it ok?)?
String script =
"(function() {"
+ " var origShowErrorBox= rwt.runtime.ErrorHandler.showErrorBox;"
+ " rwt.runtime.ErrorHandler.showErrorBox = function(errorType, freeze, errorDetails) {"
+ " if (errorType !== \"connection error\") {"
+ " origShowErrorBox(errorType, freeze, errorDetails);"
+ " } else {"
+ " rwt.remote.Connection.getInstance()._retry();"
+ " };"
+ " };"
+ "}());";
or
String script =
"(function() {"
+ " var origShowErrorBox= rwt.runtime.ErrorHandler.showErrorBox;"
+ " rwt.runtime.ErrorHandler.showErrorBox = function(errorType, freeze, errorDetails) {"
+ " if (errorType === \"connection error\") {"
+ " rwt.remote.Connection.getInstance()._retry();"
+ " };"
+ " };"
+ "}());";
?
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| Re: Occasional Network Error popup [message #1739040 is a reply to message #1739007] |
Wed, 27 July 2016 07:17 |
Vincenzo Caselli
Messages: 202
Registered: January 2012 |
Senior Member |
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Hi Ivan,
thank you, I tried, but doesn't work.
But there is something more basic that I do not understand:
if I get it correctly (I am very poor at JS) from your very first snippet in this thread, this is a way to override the original method.
Assuming this, then this variant:
String script =
"(function() {"
+ " var origShowErrorBox=rwt.runtime.ErrorHandler.showErrorBox;"
+ " rwt.runtime.ErrorHandler.showErrorBox = function(errorType, freeze, errorDetails){"
+ " origShowErrorBox(errorType, freeze, errorDetails);"
+ " };"
+ "}()"
+ ");";
should have zero-effect, that is, should override the showErrorBox() method with itself unchanged.
Instead if I try this (just stopping the server and trying to continue to use the application) I see a different behaviour with or without executing this script: without executing a get a Network Error popup, while executing this I get no popup, just the application doesn't respond (which is normal since the server is stopped).
Shouldn't the behaviour be the same?
What am I missing?
Thank you
Vincenzo
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| Re: Occasional Network Error popup [message #1739043 is a reply to message #1739040] |
Wed, 27 July 2016 08:03 |
Ivan Furnadjiev
Messages: 2277
Registered: July 2009
Location: Sofia, Bulgaria |
Senior Member |
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Hi Vincenzo,
here is a working Java function:
---
private static void patchClient() {
JavaScriptExecutor executor = RWT.getClient().getService(
JavaScriptExecutor.class );
StringBuilder builder = new StringBuilder();
builder.append( "(function() {" );
builder.append( " var errorHandler = rwt.runtime.ErrorHandler;" );
builder.append( " var origShowErrorBox = rwt.util.Functions.bind(
errorHandler.showErrorBox, errorHandler );" );
builder.append( " errorHandler.showErrorBox = function( errorType,
freeze, errorDetails ) {" );
builder.append( " if( errorType === \"connection error\" ) {" );
builder.append( " setTimeout( function() {");
builder.append( " rwt.remote.Connection.getInstance()._retry();" );
builder.append( " }, 100 );");
builder.append( " } else {");
builder.append( " origShowErrorBox( errorType, freeze,
errorDetails );");
builder.append( " }");
builder.append( " };" );
builder.append( "}() );" );
executor.execute( builder.toString() );
}
---
The "context" was not set when the original function is called.
HTH,
Ivan
On 7/27/2016 10:17, Vincenzo Caselli wrote:
> origShowErrorBox(errorType, freeze, errorDetails);
--
Ivan Furnadjiev
Twitter: @EclipseRAP
Blog: http://eclipsesource.com/blogs/
Professional services for RAP and RCP?
http://eclipsesource.com/services/rap/
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