> I'm using MIDAS javascript interface (mjsonrpc) to communicate with a frontend from a custom web page 
> and observe that the if the frontend's response exceeds certain number of bytes, it is always truncated. 
> 
> MIDAS C/C++ RPC interface allows users to specify the max response length :
> 
> https://daq00.triumf.ca/MidasWiki/index.php/Remote_Procedure_Calls_(RPC)#C++_2
> 
> How would one do the same from with mjsonrpc ? 

I just documented the max_reply_length (javascript) and max_len (python) parameters on that page. Both are optional and default to 1024 bytes.

I also added a link to the full mjsonrpc schema https://daq00.triumf.ca/MidasWiki/index.php/Mjsonrpc#Schema_(List_of_all_RPC_methods) . You can also find the auto-generated schema on any midas installation by going to the "Help" webpage served by mhttpd and clicking the "JSON-RPC schema" > "text table format" link.