Basile, It was my experience with libevent 1.4 that the entire post was buffered prior to callback. At a very minimum this opened my system up to a DOS attack. Since I didn't find a way to get incremental callbacks in the end I abandoned use of the http layer in libevent.
Ron Parker Movik Networks On Nov 6, 2010, at 4:32 AM, Basile Starynkevitch <bas...@starynkevitch.net> wrote: > On Fri, 5 Nov 2010 23:58:47 +0100 > Basile Starynkevitch <bas...@starynkevitch.net> wrote: >> Do you have an example of an HTTP server in libevent which handles a >> POST request? >> >> Apparently, calling evbuffer_readline (hreq->input_buffer); from inside >> a callback registered with evhttp_set_cb don't work as expected. > > In fact, the POST-ed data is available with EVBUFFER_LENGTH > (req->input_buffer) & EVBUFFER_DATA(req->input_buffer) as tge > regress_http.c test example shows. But this is not well documented, and > perhaps might not work for big data. > > Of course, in the usual case, the POST-ed data is coming from > submitting an HTML form, so its Content-type is > "application/x-www-form-urlencoded" and the application has to decode > that. > > What I don't know is what happens when the web client (e.g. some > Firefox browser in my case) sends the data in several write(2) or send > (2) system calls. This probably could happen (I suppose) when the data > is large enough (e.g >10kbytes), as could be the case when a TEXTAREA > HTML element is implied. > > In that case, I don't understand if the libevent is buffering the > entire HTTP request (so that the HTTP callback is always called once, > after all the buffering succeeded) or not. > > Cheers. > > -- > Basile STARYNKEVITCH http://starynkevitch.net/Basile/ > email: basile<at>starynkevitch<dot>net mobile: +33 6 8501 2359 > 8, rue de la Faiencerie, 92340 Bourg La Reine, France > *** opinions {are only mine, sont seulement les miennes} *** > *********************************************************************** > To unsubscribe, send an e-mail to majord...@freehaven.net with > unsubscribe libevent-users in the body. *********************************************************************** To unsubscribe, send an e-mail to majord...@freehaven.net with unsubscribe libevent-users in the body.
