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Modify rhttp preconnect by instantiating a new session for each connection attempt. Connection is thus linked to a session directly on its instantiation contrary to previously where no session existed until listener_accept(). This patch will allow to extend rhttp usage. Most notably, it will be useful to use various sample fetches on the server line and extend logging capabilities. Changes are minimal, yet consequences are considered not trivial as for the first time a FE connection session is instantiated before listener_accept(). This requires an extra explicit check in session_accept_fd() to not overwrite an existing session. Also, flag SESS_FL_RELEASE_LI is not set immediately as listener counters must note be decremented if connection and its session are freed before reversal is completed, or else listener counters will be invalid. conn_session_free() is used as connection destroy callback to ensure the session will be freed automatically on connection release. |
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