Hi,
I'm writing an iPhone client in Objective-C to communicate with the
APE server (real-time chat example). I used Firefox with Firebug to
check out the communication between the web browser and the APE server
in JSON format (the info on the wiki doesn't fully apply on the real-
time chat example with channel and session support).
The first request:
[{"cmd":"CONNECT","chl":1,"params":{"name":"Michiel"}},
{"cmd":"JOIN","chl":2,"params":{"channels":"testChannel"}}]
APE server responds:
[{"time":"1274259299","raw":"LOGIN","data":
{"sessid":"ff7876da9f6d3ea9c84d0510f5f44fc9"}},
{"time":"1274259299","raw":"IDENT","data":{"user":
{"casttype":"uni","pubid":"49826c351f9b49b785ae0255daf8017b","properties":
{"name":"GERT"}}}},{"time":"1274259299","raw":"CHANNEL","data":
{"users":
[{"casttype":"uni","pubid":"49826c351f9b49b785ae0255daf8017b","properties":
{"name":"Michiel"},"level":1}],"pipe":
{"casttype":"multi","pubid":"163d8c9f290d81b6dbb336f7755dd3e4","properties":
{"name":"testchannel"}}}}]
The session ID from the first server response is used to send the next
CHECK command with HTTP header Connection: Keep-Alive.
The second request:
[{"cmd":"CHECK","chl":3,"sessid":"ff7876da9f6d3ea9c84d0510f5f44fc9"}]
If some event happens in the upcoming 25 seconds after sending the
CHECK command (e.g. LEFT, JOIN or someone who broadcasts a message in
the channel) the APE server responds with the raw response. Example:
[{"time":"1274259307","raw":"JOIN","data":{"user":
{"casttype":"uni","pubid":"4ce6a7087e4fddae7e8d801e296e5af0","properties":
{"name":"Firefox"}},"pipe":
{"casttype":"multi","pubid":"163d8c9f290d81b6dbb336f7755dd3e4","properties":
{"name":"testchannel"}}}}]
Until now it's all working OK. But when there's no event in the 25
seconds after the CHECK command, the server responds with an error
which keeps telling me my session ID is wrong (BAD_SESSID). While
using FireFox I'm not encountering this problem (server responds with
CLOSE).
Does anyone know in which way my custom client differs from what the
web browser does, which could lead to the BAD_SESSID error?
Thanks.
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APE Project (Ajax Push Engine)
Official website : http://www.ape-project.org/
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