Hello, after the discussion regarding http and http_async, I started some labs to make a comparison and see what’s the trade off and the associated cost.

Main problem (to me) is im not clear on how transactions behave. Im running some fast tests now before I start to deploy the final scenarios and

1. A new transaction is created before the http_async call (as the module example shows for http_async_query function
2. The http_async_query call is executed, receives a response and the HTTP_REPLY route for http_async_query is executed.
3. As we need to redirect the call, im adding Contact information with append_to_reply and then calling t_reply(302,”Redirect)

Up to here INVITE is received, a 100 is answered and then the 302 with the expected Contact information (collected and built from the http_async_query response), problem is that the 302 is retransmitted 3 more times.

So, im not even sure that im doing the correct actions to process the call this way. Is there a document/book/reference I can read to understand transactions better?

By now I can not handle the call to be processed correctly (without the retransmissions) and finish the transaction the correct way.

Any help, link, guide, will be appreciated.

Regards.

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