I have had more problems than worth mentioning with the LocalConnection API, but felt compelled to write about it after finally getting everything up and running.

The setup I have involves an AIR app communicating with a Flex 3 application running on an SSL enabled web page and back again. There seems to be rarely any problems going from browser to AIR, since the AIR app is easily addressable using the applicationID and publisherID strings or by passing strings though outside of the localconnection method in arguments along with the browserInvoke event.

When communicating from the AIR app back to the browser it seems to be rather fragile and fails regularly. Addressing the browser I use the last part of the domain and random ID of the browser flex instance (see previous post) eg “imbimp.com:dhdvgks35357″.

Now unbeknown to me, the domain string should not be the top level domain shown in the browsers address bar but should in fact match the TLD of where the Flex SWF file is hosted if of course it is different from your original site.

There are a few confusing bits and pieces to include around allowDomain and allowInsecureDomain, all of which are fairly well documented on Adobe’s livedocs pages, but seemed to have little effect when faced with inadvertantly addressing the wrong place.

No error event is thown in this case, just a statusEvent classing the connection attempt as an error of no particular type. Annoying.