c - G-WAN persist request data in handler -


solution:

int session = (int)get_env(argv, session_id); identifier unique connection us_vhost_data (vhost) or us_handler_data (listener) or us_server_data (server) data persistent > current connection

missing pieces:

  • either persistent data connection only
  • or way execute code when current connection closed client (econnreset etc.) or server (e.g. kalive_tmo reached)

this should solvable new hdl_before_close state handlers added, makes question answered me.

original question:

is possible in g-wan handler store information persistent request/connection (don't know if "request" applies here)?

to better illustrate mean, got now:

  • client (browser, javascript) sends websocket handshake
  • handler starts, gets into:
    • hdl_after_accept - here call gc_init us_request_data, , no error
    • hdl_after_read - here check us_request_data not yet set, websocket handshake , gc_malloc + set us_request_data, increase kalive_tmo, , return 2 send data
  • client sees websocket connection being established, (manually triggered seconds afterwards) send message
  • handler goes hdl_after_read again, but us_request_data not set

what i've tried: returning 1 instead of 2 in hdl_after_read -> client gets 404 , handshake not work

at moment i'm using us_request_data identify if websocket connection established , next incoming data should in websocket message format, if there different (maybe better?) solution, i'm open of course.

thanks!

edit: added clarification request/connection

i not sure why us_request_data not seem keep allocated block of memory.

can try persistence.c example see if works expected you?

other g-wan persistent pointers, can use os services linux shared memory api, etc.

but g-wan api should work fine once copy & paste example above.

other values have different scopes:

  • us_vhost_data (scope:vhost)
  • us_handler_data (scope:listener)
  • us_server_data (scope:server)

use session id below unique each connection:

int session = (int)get_env(argv, session_id);

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