How ELMAH can log Jayrock exceptions

[Eduardo Guardiola]

Hi Atif,

The exceptions produced calling JayRock's rpc methods aren't logged by ELMAH, instead they are sent to the client including stacktraces.

I only want to send the exception Message to the client and the exception to be logged by ELMAH...

Can you help on this?

[Atif Aziz]

Stack traces are only included and sent to the client if the request is local (within the same host).

Errors won't be logged to ELMAH because they are not unhandled, so to speak. They are “handled” on the server and transmitted back to the client as the response. What you can do is register your own subclass of JsonRpcDispatcher and override the OnError method to then log to ELMAH. I have published a gist showing your just how to do that. You can download and run the file in LINQPad.

- Atif

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[Edu]

Many many thanks. The support you bring to your projects is awesome. :-)

[Edu]

Hi Atif,

Following your directions it easy to log jayrocks exceptions into ELMAH but it seems the form data of the rpc calls isn't being logged (raw XML is not showing it either). ¿Do you think it is expected in this context ? Can be added someway?

[Atif Aziz]

Hi,

Yes, that's quite normal. A JSON-RPC call is not “forms data”. In other words, it's not a POST where the Content-Type header specifies application/x-www-form-urlencoded.

- Atif

[Edu]

What i'm trying to log is the json request payload with the rpc method and parameters. No way? :-/

[Atif Aziz]

Here's the problem, a JSON-RPC request is in the HTTP body, which is represented as a stream. Once this stream has been consumed, such as by Jayrock to call your service, it cannot be rewound by something like ELMAH to be read again for logging. You would need to buffer the stream & then customize Jayrock & ELMAH through their various extensibility points to use the buffered input.

- Atif

[Edu]

I see.. :-/ thanks for your help!