How do I find the root cause of a NetConnection closed event?

[davidxop]

Hi,

I am maintaining a large project developed in Flex/Actionscript.

The application is using tunneling (RTMPT), and we often get Netconnection "closed" events.

There is no problem with the physical network.

I think the event may be caused by either a TCP/HTTP/RTMP event, or may be caused by

some function in the client calling close() on the connection.

How can I find the root cause of the "closed" event being thrown?

Thanks,

David

[kglad]

use a network analyzer like wireshark or charles (or maybe firebug).

[davidxop]

We have used wireshark to check the network packets.  Everything seems ok.

Where is the specification that describes RTPMT and how the sockets and HTTP content (including header settings)

should work?

[kglad]

this should get you started:

http://www.adobe.com/devnet/rtmp.html

http://help.adobe.com/en_US/ActionScript/3.0_ProgrammingAS3/WS5b3ccc516d4fbf351e63e3d118a9b90204-7cf...

[davidxop]

Thanks. 

It does describe the basic RTMP, but we are having trouble with the tunneled variant (RTMPT).

Where is the specification for RTMPT?

[kglad]

there are different implementations of rtmpt for different servers. 

here's the redhat implementation:  http://www.joachim-bauch.de/tutorials/red5/rtmpt-protocol/

[davidxop]

Thanks for the information.  It is helpful but it seems there must be a specification of

what the client side is expecting, independent of any server implementation. 

When I say client side, I mean the Adobe communication libraries.

Where is the specification or source code for how the client libraries treat HTTP tunneled requests and responses?

One question in particular:  How does the client side library treat a

   Connection: Keep-Alive

versuse

   Connection:close

HTTP header setting?

[kglad]

that i don't know off-hand.

[davidxop]

Is there a particular function call where we can set a breakpoint in the debugger to see where

"connection closed" events are generated?