Re: [Libevent-users] evhttp, evhttp_send_reply_start and client close

[Vincent Bernat <bernat@xxxxxxxx>]

 â 12 aoÃt 2012 11:02 CEST, Vincent Bernat <bernat@xxxxxxxx>Â:

> I am trying to use HTTP chunked answers to implement a publish/subscribe
> mechanism on top of evhttp. A client will subscribe to a topic by
> requesting some URL, I invoke evhttp_send_reply_start(), put the request
> into some list and once a message is available for a topic, I take my
> list and for each member, I will send the new messages with
> evhttp_send_reply_chunk().
>
> My question is: how do I handle the case where the client disconnects? I
> have found a similar problem in this post:
>  http://archives.seul.org/libevent/users/Jan-2010/msg00054.html
>
> The linked gist does not crash anymore but, in my case, I need to remove
> the "dead" clients from my linked list (or I will soon run into some
> memory issue).

Reading a bit the source code, I have discovered that I can check if
`evhttp_request_get_connection(h->req)` is `NULL` or not. If it is, I
need to remove the request from my list of requests.
-- 
Watch out for off-by-one errors.
            - The Elements of Programming Style (Kernighan & Plauger)
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