How to change the timeout only for some specific XML-RPC calls

Question

I'm using the XML-RPC for C/C++ (over CURL) client library in version 1.25.23 to:

• send data to ...

and

• receive (poll) events from ...

...XML-RPC application server.

To reduce the data traffic (while polling the events) i'm trying to implement the "long polling" mechanism for some (!) specific methods. To do so i need to change the "Global Request Timeout" value only for those calls to "no timeout", wich is different from the global timeout value (e.g. 3 sec.). Unfortunately i don't see the possibility to do so, without to destroy and recreate the global client instance (xmlrpc_client_cleanup / xmlrpc_client_init2) for every single request!!!! i dont think it would be a good solution.

Has anybody experience in implementation of "long polling" with XML-RPC over CURL?

Thank You in advance! Max

Answer 1

Thanks to Bryan Henderson!!

I can think of two things.

First, you don't have to use the global XML-RPC client. You could have two private clients - use one for regular XML-RPC RPCs and the other one for RPCs that take a long time.

http://xmlrpc-c.sourceforge.net/doc/libxmlrpc_client.html#privateclient

The other thing you can do is not use the Curl transport timeout and instead use an alarm signal (SIGALRM) to interrupt RPCs that are taking too long.

http://xmlrpc-c.sourceforge.net/doc/libxmlrpc_client.html#interrupting

The idea of "private client" did it for me!!!